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THE INTERNET FUND

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Investment Objectives

Objective, Secondary [Text Block]

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The investment objective of the Internet Fund is long-term growth of capital.

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The Internet Fund seeks to obtain current income as a secondary objective. The Internet Fund is the sole “feeder fund” to The Internet Portfolio, a series of Kinetics Portfolios Trust.

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Fees and Expenses of the Fund

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This table describes the fees and expenses that you may pay if you buy, hold, and sell shares of the Internet Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the table and example below.

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SHAREHOLDER FEES(fees paid directly from your investment)

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ANNUAL FUND OPERATING EXPENSES (expenses that you pay each year as a percentage of the value of your investment)

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Portfolio Turnover.

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The Internet Portfolio pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the Example, affect the Internet Portfolio’s, and therefore the Internet Fund’s, performance. During the most recent fiscal year, the Internet Portfolio’s portfolio turnover rate was 19% of the average value of its portfolio.

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19.00%

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This table and the example below reflect the aggregate expenses of the Internet Fund and the Internet Portfolio. The management fees paid by the Internet Fund reflect the proportionate share of fees allocated to the Internet Fund from the Internet Portfolio.The fees and expenses of the Internet Portfolio included those incurred by any subsidiary wholly-owned and controlled by the Internet Portfolio.

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Example.

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This Example is intended to help you compare the cost of investing in the Internet Fund with the cost of investing in other mutual funds. This Example assumes that you invest $10,000 in the Internet Fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Internet Fund’s operating expenses remain the same (taking into account the expense limitation only in the first year).

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Although your actual costs may be higher or lower, based on these assumptions your costs for the Internet Fund would be:

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Principal Investment Strategy

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The Internet Fund is a non-diversified fund that invests all of its investable assets in the Internet Portfolio, a series of Kinetics Portfolios Trust. Under normal circumstances, the Internet Portfolio invests at least 80% of its net assets plus any borrowings for investment purposes in common stocks, convertible securities, warrants and other equity securities having the characteristics of common stocks (such as American Depositary Receipts (“ADRs”), Global Depositary Receipts (“GDRs”) and International Depositary Receipts (“IDRs”)), of U.S. and foreign companies engaged in the Internet and Internet‑related activities and whose businesses are vastly improved through the distribution of content and reduction of costs with the use of the Internet, such as content providers, computer hardware and software, venture capital, Internet service providers, Internet portals, wireless/broadband access, e-commerce, financial service companies, auction houses, and telecommunications. The Internet Portfolio may also invest in exchange-traded funds (“ETFs”) and purchase and write options for hedging purposes and/or direct investment.

The Internet Portfolio may invest up to 20% of its total assets in convertible and non-convertible debt securities rated below investment grade, also known as junk bonds, or unrated securities that the Investment Adviser has determined to be of comparable quality.

The Investment Adviser selects portfolio securities by evaluating a company’s positioning and business model as well as its ability to grow and expand its activities via the Internet or achieve a competitive advantage in cost/profitability and brand image leveraging via use of the Internet. The Investment Adviser also considers a company’s fundamentals by reviewing its balance sheets, corporate revenues, earnings and dividends. Furthermore, the Investment Adviser looks at the amount of capital a company currently expends on research and development. The Internet Portfolio may invest in companies of any size, including small and medium-sized companies. Additionally, the Internet Portfolio may participate in securities lending arrangements up to 33-1/3% of the securities in its portfolio with brokers, dealers, and financial institutions (but not individuals) in order to increase the return on its portfolio.

The Internet Portfolio may invest indirectly in bitcoin through a Delaware statutory trust, Grayscale Bitcoin Trust ETF (“Grayscale Bitcoin Trust”) and through other pooled investment vehicles that provide exposure to crypto assets. Certain of these vehicles may not be registered under the Investment Company Act of 1940, as amended (the “1940 Act”) and do not receive the protections of the 1940 Act. The Internet Portfolio will not invest directly in Bitcoin or other crypto assets. Grayscale Bitcoin Trust is one of the first spot Bitcoin ETFs in the U.S. It enables investors to gain exposure to bitcoin in the form of a security while avoiding the challenges of buying, storing, and safekeeping bitcoin, directly. Bitcoins are a type of crypto assets that are not issued by a government, bank or central organization. Bitcoins exist on an online, peer-to-peer computer network (the “Bitcoin Network”) that hosts a public transaction ledger where bitcoin transfers are recorded (the “Blockchain”). Bitcoins have no physical existence beyond the record of transactions on the Blockchain. The Grayscale Bitcoin Trust invests principally in bitcoins. The Internet Portfolio held 52.67% of its net assets in the Grayscale Bitcoin Trust as of March 31, 2024. The amount of the Internet Portfolio’s investment in crypto assets may be limited by law or by tax considerations.

The Internet Portfolio contributed a portion of its holdings in the Grayscale Bitcoin Trust to a wholly-owned and controlled subsidiary organized under the laws of the Cayman Islands (the “Cayman Subsidiary”).

The Internet Portfolio is also the sole shareholder of a wholly owned subsidiary organized under Delaware law (the “Delaware Subsidiary”). The Internet Portfolio contributed a portion of its holdings in the Grayscale Bitcoin Trust to the Delaware Subsidiary. Any net gains that the Delaware Subsidiary recognizes on future sales of the contributed Grayscale Bitcoin Trust shares will be subject to federal and state corporate income tax, but the dividends that the Delaware Subsidiary pays to the Internet Portfolio (i.e., those gains, net of the tax paid and any other expenses of the Delaware Subsidiary, such as its management and advisory fees) will be eligible to be treated as “qualified dividend income” under the Internal Revenue Code of 1986, as amended (the “Internal Revenue Code”). The Delaware Subsidiary and the Cayman Subsidiary are each referred to herein as a “Subsidiary” and collectively as “Subsidiaries.” Additional information regarding the tax treatment of the Fund is provided in the “Taxes” section of the SAI.

In the future, the Internet Portfolio may seek to gain additional exposure to the Grayscale Bitcoin Trust that may not produce qualifying income for the Internet Fund under the Internal Revenue Code if held directly. The Internet Portfolio will not make any additional investments in the Grayscale Bitcoin Trust if as a result of such investment, its aggregate investment in the Grayscale Bitcoin Trust, either directly or through a Subsidiary, would be more than 15% of its assets at the time of the investment. However, the Portfolio’s investment in the Grayscale Bitcoin Trust may, at times, exceed 15% of its net assets, due to appreciation.

Each Subsidiary invests primarily in the Grayscale Bitcoin Trust. The Internet Portfolio will invest in its Subsidiaries in a manner that is consistent with the limitations of the federal tax laws, rules and regulations that apply to the Internet Fund as a “regulated investment company” (“RIC”) under Subchapter M of Subtitle A, Chapter 1, of the Internal Revenue Code (“Subchapter M”). However, the Internet Portfolio and each Subsidiary comply with the same fundamental investment restrictions on an aggregate basis, to the extent those restrictions are applicable to the investment activities of each Subsidiary. Each Subsidiary also complies with Section 17 of the 1940 Act relating to affiliated transactions and custody, and the Investment Adviser complies with Section 15 of the 1940 Act, relating to investment advisory contracts with respect to the Subsidiaries. Unlike the Internet Fund, each Subsidiary does not, and will not, seek to qualify as a RIC. The Internet Portfolio is the sole shareholder of each Subsidiary and does not expect shares of the Subsidiaries to be offered or sold to other investors. The Subsidiaries include entities that engage in investment activities in securities or other assets that are primarily controlled by the Internet Portfolio. The Internet Portfolio does not intend to create or acquire primary control of any entity which primarily engages in investment activities in securities or other assets other than entities wholly-owned by the Internet Portfolio.

Sell decisions are generally triggered by either adequate value being achieved, as determined by the Investment Adviser, or by an adverse change in a company’s operating performance or a deterioration of the company’s business model. A sell trigger may also occur if the Investment Adviser discovers a new investment opportunity that it believes is more compelling and represents a greater risk reward profile than other investment(s) held by the Internet Portfolio.

The Internet Portfolio may maintain during a temporary period, which could be for a short period or a longer period lasting several years or more, of abnormal conditions, a significant portion of its total assets in cash and securities, generally considered to be cash and cash equivalents, including, but not limited to: high quality, U.S. short-term debt securities and money market instruments. The Investment

Adviser will invest in such short-term cash positions to the extent that the Investment Adviser is unable to find sufficient investments meeting its criteria and when the Investment Adviser believes the purchase of additional equity securities would not further the investment objective of the Internet Portfolio during such periods of time. Additionally, to respond to adverse market, economic, political or other conditions, which may persist for short or long periods of time, the Internet Portfolio may invest up to 100% of its assets in the types of high quality, U.S. short-term debt securities and money market instruments described above.

If the market advances during periods when the Internet Portfolio is holding a large cash position, the Portfolio may not participate as much as it would have if it had been more fully invested in securities. In the aforementioned temporary defensive periods, the Investment Adviser believes that an additional amount of liquidity in the Internet Portfolio is desirable both to meet operating requirements and to take advantage of new investment opportunities. When the Internet Portfolio holds a significant portion of assets in cash and cash equivalents, it may not meet its investment objective.

The Internet Portfolio held 14.20% of its net assets in the Texas Pacific Land Corporation (the “Land Corporation”) as of March 31, 2024. The Land Corporation is a corporation organized under the laws of the state of New York. One of the largest land owners in Texas, the Land Corporation derives most of its income from oil and gas royalty revenue, land easements and water royalties and sales. The Land Corporation has historically operated with minimal operating expenses, little to no debt and utilized cash flow to return capital to unitholders through share repurchases and dividends. While the Land Corporation has held the majority of its assets since its formation in 1888, the development of energy resources subject to its royalty interests and related land use have experienced rapid growth in recent years due to advances in energy exploration and extraction technologies.

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Under normal circumstances, the Internet Portfolio invests at least 80% of its net assets plus any borrowings for investment purposes in common stocks, convertible securities, warrants and other equity securities having the characteristics of common stocks (such as American Depositary Receipts (“ADRs”), Global Depositary Receipts (“GDRs”) and International Depositary Receipts (“IDRs”)), of U.S. and foreign companies engaged in the Internet and Internet‑related activities and whose businesses are vastly improved through the distribution of content and reduction of costs with the use of the Internet, such as content providers, computer hardware and software, venture capital, Internet service providers, Internet portals, wireless/broadband access, e-commerce, financial service companies, auction houses, and telecommunications. The Internet Portfolio may also invest in exchange-traded funds (“ETFs”) and purchase and write options for hedging purposes and/or direct investment. The Internet Portfolio may invest up to 20% of its total assets in convertible and non-convertible debt securities rated below investment grade, also known as junk bonds, or unrated securities that the Investment Adviser has determined to be of comparable quality.

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Principal Investment Risks

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Performance

Performance Information Illustrates Variability of Returns [Text]

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The bar chart and table shown below illustrate the variability of the Internet Fund’s returns. The bar chart indicates the risks of investing in the Internet Fund by showing the changes in the Internet Fund’s performance from year to year (on a calendar year basis). The table shows how the Internet Fund’s average annual returns, before and after taxes, compare with those of the S&P 500® Index and the NASDAQ Composite® Index, which represent broad measures of market performance. The past performance of the Internet Fund, before and after taxes, is not necessarily an indication of how the Internet Fund or the Internet Portfolio will perform in the future. Updated performance information is available on the Fund’s website at http://www.kineticsfunds.com or by calling the Fund toll-free at (800) 930-3828.

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The bar chart and table shown below illustrate the variability of the Internet Fund’s returns.

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(800) 930-3828

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http://www.kineticsfunds.com

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The past performance of the Internet Fund, before and after taxes, is not necessarily an indication of how the Internet Fund or the Internet Portfolio will perform in the future.

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The Internet Fund – No Load ClassCalendar Year Returns as of 12/31

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Best Quarter:	Q4 2020	51.80	%
Worst Quarter:	Q2 2022	-25.13	%

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Best Quarter:

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Dec. 31, 2020

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51.80%

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Worst Quarter:

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Jun. 30, 2022

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(25.13%)

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Average Annual Total Returns as of 12/31/2023

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If you own Fund shares in a tax-deferred account, such as a 401(k) plan or an individual retirement account (“IRA”), the information on after-tax returns is not relevant to your investment.

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The Return After Taxes on Distributions and Sale of Fund Shares is higher than other return figures when a capital loss occurs upon the redemption of Fund shares.

No Load Class Prospectus | Kinetics Internet Fund | Risk Lose Money [Member]

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The Internet Fund’s after-tax returns as shown in the following table are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Your actual after-tax returns depend on your tax situation and may differ from those shown. If you own Fund shares in a tax-deferred account, such as a 401(k) plan or an individual retirement account (“IRA”), the information on after-tax returns is not relevant to your investment. The Return After Taxes on Distributions and Sale of Fund Shares is higher than other return figures when a capital loss occurs upon the redemption of Fund shares.

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No Load Class Prospectus | Kinetics Internet Fund | Crypto Asset Exposure Risk Member

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Investing in common stocks has inherent risks that could cause you to lose money.

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No Load Class Prospectus | Kinetics Internet Fund | Crypto Asset Industry Risk Member

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ª Crypto Asset Exposure Risk: Crypto assets (also referred to as “virtual currencies” and “digital currencies”) are digital assets designed to act as a medium of exchange. Although crypto assets are an emerging asset class, they are not presently widely accepted as a medium of exchange. There are thousands of crypto assets, the most well-known of which is bitcoin.

Bitcoin or BTC was the first decentralized crypto asset. Bitcoin is a type of crypto asset that is not issued by a government, bank or central organization. Bitcoin exists on an online, peer-to-peer computer network that hosts the Blockchain. Bitcoin has no physical existence beyond the record of transactions on the Blockchain. The Bitcoin Network allows people to exchange tokens of value, bitcoins, which are recorded on a public transaction ledger known as a Blockchain. The Fund may invest indirectly in bitcoin through the Grayscale Bitcoin Trust and through other pooled investment vehicles that provide exposure to crypto assets. Grayscale Bitcoin Trust is one of the first spot Bitcoin ETFs in the U.S. It enables investors to gain exposure to bitcoin in the form of a security while avoiding the challenges of buying, storing, and safekeeping bitcoin, directly.

In addition to the general risks of investing in other investment vehicles, the value of the Internet Portfolio’s indirect investments in crypto assets are subject to fluctuations in the value of the crypto asset, which can be highly volatile. The value of crypto assets is determined by the supply and demand for crypto assets in the global market for the trading of crypto assets, which consists primarily of transactions on crypto asset trading platforms. The value of crypto assets has been, and may continue to be, substantially dependent on speculation, such that trading and investing in crypto assets generally may not be based on fundamental analysis. The Internet Portfolio’s exposure to crypto assets can result in substantial losses to the Internet Fund.

Crypto assets facilitate decentralized, peer-to-peer financial exchange and value storage, without the oversight of a central authority or banks. The value of crypto assets are not backed by any government, corporation, or other identified body. Crypto assets are also susceptible to theft, loss and destruction.

Crypto assets trade on crypto asset trading platforms, which are largely unregulated and may therefore be more exposed to fraud and failure than established, regulated exchanges for securities, derivatives and other currencies. These crypto asset trading platforms can cease operating temporarily or even permanently, resulting in the potential loss of users’ crypto assets or other market disruptions. Crypto asset trading platforms may be more exposed to the risk of market manipulation than exchanges for more traditional assets. Individuals or organizations holding a large amount of crypto assets in which the Internet Portfolio may invest indirectly (also known as “whales”) may have the ability to manipulate the prices of those crypto assets. Crypto asset trading platforms on which crypto assets are traded are or may become subject to enforcement actions by regulatory authorities. Crypto asset trading platforms that are regulated typically must comply with minimum net worth, cybersecurity, and anti-money laundering requirements, but are not typically required to protect customers or their markets to the same extent that regulated securities exchanges or futures exchanges are required to do so. Furthermore, crypto asset trading platforms may be operating out of compliance with regulations, and many crypto asset trading platforms lack certain safeguards established by more traditional exchanges to enhance the stability of trading on the exchange, such as measures designed to prevent sudden drops in value of items traded on the exchange (i.e., “flash crashes”). As a result, the prices of crypto assets on crypto asset trading platforms may be subject to larger and more frequent sudden declines than assets traded on more traditional exchanges.

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No Load Class Prospectus | Kinetics Internet Fund | Crypto Asset Regulatory Risk Member

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ª Crypto Asset Industry Risk: The crypto asset industry is a newer, speculative, and still-developing industry that faces many risks. The crypto asset industry may still be experiencing a bubble or may experience a bubble again in the future. For example, in the first half of 2022, each of Celsius Network, Voyager Digital Ltd., and Three Arrows Capital declared bankruptcy, resulting in a loss of confidence in participants of the digital asset ecosystem and negative publicity surrounding digital assets more broadly. In November 2022, FTX Trading Ltd. (“FTX”), one of the largest digital asset platforms by volume at the time, halted customer withdrawals amid rumors of the company’s liquidity issues and likely insolvency, which were subsequently corroborated by its CEO. Shortly thereafter, FTX’s CEO resigned and FTX and many of its affiliates filed for bankruptcy in the United States, while other affiliates have entered insolvency, liquidation, or similar proceedings around the globe, following which the U.S. Department of Justice brought criminal fraud and other charges, and the SEC and CFTC brought civil securities and commodities fraud charges, against certain of FTX’s and its affiliates’ senior executives, including its former CEO. In addition, several other entities in the crypto asset industry filed for bankruptcy following FTX’s bankruptcy filing, such as BlockFi Inc. and Genesis Global Capital, LLC. In response to these events, the prices of crypto assets have experienced extreme volatility and other entities in the crypto asset industry have been, and may continue to be, negatively affected, further undermining confidence in the crypto asset industry.

These events are continuing to develop and the full facts are continuing to emerge. It is not possible to predict at this time all of the risks that they may pose to the Internet Portfolio, and therefore the Internet Fund, its service providers or to the crypto asset industry as a whole.

Factors affecting the further development of crypto assets include, but are not limited to, continued worldwide growth or possible cessation or reversal in the adoption and use of crypto assets and other digital assets; government and quasi-government regulation or restrictions on or regulation of access to and operation of digital asset networks; changes in consumer demographics and public preferences; maintenance and development of open-source software protocol; availability and popularity of other forms or methods of buying and selling goods and services; the use of the networks supporting digital assets, such as those for developing smart contracts and distributed applications; general economic conditions and the regulatory environment relating to digital assets; negative consumer or public perception; and general risks tied to the use of information technologies, including cyber risks. A hack or failure of one crypto asset may lead to a loss in confidence in, and thus decreased usage and/or value of, other crypto assets.

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No Load Class Prospectus | Kinetics Internet Fund | Risk Nondiversified Status [Member]

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ª Crypto Asset Regulatory Risk: Crypto asset markets in the U.S. exist in a state of regulatory uncertainty. Regulatory changes or actions by Congress as well as U.S. federal or state agencies may adversely affect the value of the Internet Portfolio’s indirect investments in crypto assets. As digital assets have grown in both popularity and market size, a number of state and federal agencies have issued consumer advisories regarding the risks posed by digital assets to investors. In addition, the Securities and Exchange Commission, U.S. state securities regulators and several foreign governments have issued warnings and instituted legal proceedings in which they argue that certain digital assets may be classified as securities and that both those digital assets and any related initial coin offerings are subject to securities regulations. Additionally, U.S. state and federal, and foreign regulators and legislatures have taken action against virtual currency businesses or enacted restrictive regimes in response to adverse publicity arising from hacks, consumer harm, or criminal activity stemming from virtual currency activity.

Currently, there is relatively limited use of crypto assets in the retail and commercial marketplace, which contributes to price volatility. A lack of expansion by crypto assets into retail and commercial markets, or a contraction of such use, may result in increased volatility or a reduction in the value of crypto assets, either of which could adversely impact the value of the Internet Portfolio’s investment. In addition, to the extent market participants develop a preference for one crypto asset over another, the value of the less preferred crypto assets would likely be adversely affected.

The Internet Portfolio’s exposure to crypto assets may change over time and, accordingly, such exposure may not be represented in the Internet Portfolio’s portfolio at any given time. Many significant aspects of the tax treatment of investments in crypto assets are uncertain, and a direct or indirect investment in crypto assets may produce non-qualifying income. Crypto assets are a new technological innovation with a limited history; it is a highly speculative asset and future regulatory actions or policies may limit, perhaps to a materially adverse extent, the value of the Internet Portfolio’s indirect investment in crypto assets and the ability to exchange a crypto asset or utilize it for payments.

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No Load Class Prospectus | Kinetics Internet Fund | Single Stock Concentration Risk Member

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ª Non-Diversification Risks: As a non-diversified investment company, the Internet Portfolio can invest a large percentage of its assets in a small number of issuers. As a result, a change in the value of any one investment may affect the overall value of the Internet Portfolio’s shares, and therefore the Internet Fund’s shares, more than shares of a diversified mutual fund that holds more investments.

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No Load Class Prospectus | Kinetics Internet Fund | Liquidity Risks Member

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ª Single Stock Concentration Risk: The Internet Portfolio may hold a large concentration of its net assets in a single security or issuer. Holding a large concentration in a single security or issuer may expose the portfolio to the market volatility of that specific security or issuer if the security or issuer performs worse than the market as a whole, which could adversely affect the Portfolio’s performance.

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No Load Class Prospectus | Kinetics Internet Fund | Below Investment Grade Debt Securities Risk Member

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ª Liquidity Risks: The Investment Adviser may not be able to sell portfolio securities at an optimal time or price. The Portfolio’s significant investment in a single position, makes the Portfolio especially susceptible to the risk that during certain periods the liquidity of the single position will decrease or disappear suddenly and without warning as a result of adverse market or political events, or adverse investor perceptions.

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No Load Class Prospectus | Kinetics Internet Fund | Sector Concentration Risk Member

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ª Below Investment Grade Debt Securities Risks: Generally, below investment grade debt securities, i.e., junk bonds, are subject to greater credit risk, price volatility and risk of loss than investment grade securities. Junk bonds are considered to be speculative in nature.

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No Load Class Prospectus | Kinetics Internet Fund | Convertible Securities Risks Member

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ª Sector Concentration Risk: Although the Internet Portfolio will not concentrate its investments in any industries, the Internet Portfolio may, at certain times, have concentrations in one or more sectors which may cause the Portfolio to be more sensitive to economic changes or events occurring in those sectors, and the Portfolio's investments may be more volatile. As of December 31, 2023, the Portfolio had 45.3% invested in the Finance and Insurance sector and 17.5% invested in the Mining, Quarrying and Oil & Gas Extraction sector.

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No Load Class Prospectus | Kinetics Internet Fund | Exchange-Traded Funds (ETFs) Risks Member

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ª Convertible Securities Risks: Convertible securities are subject to the risks affecting both equity and fixed income securities, including market, credit, liquidity and interest rate risk.

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No Load Class Prospectus | Kinetics Internet Fund | Foreign Securities Risks Member

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ª Exchange-Traded Funds (ETFs) Risks: ETFs are registered investment companies whose shares are listed and traded on U.S. stock exchanges or otherwise traded in the over-the-counter market. In general, passively-managed ETFs seek to track a specified securities index or a basket of securities that an “index provider,” such as S&P Global, selects as representative of a market, market segment or industry sector. A passively-managed ETF is designed so that its performance will correspond closely with that of the index it tracks. A leveraged ETF will engage in transactions and purchase instruments that give rise to forms of leverage, including, among others, the use of reverse repurchase agreements and other borrowings, the investment of collateral from loans of portfolio securities, the use of when issued, delayed-delivery or forward commitment transactions or short sales. To the extent a fund invests in ETFs that achieve leveraged exposure to their underlying indexes through the use of derivative instruments, the fund will indirectly be subject to leveraging risk. As a shareholder in an ETF, the Internet Portfolio will bear its pro rata portion of an ETF’s expenses, including advisory fees, in addition to its own expenses. The existence of extreme market volatility or potential lack of an active trading market for an ETF’s shares could result in such shares trading at a significant premium or discount to their NAV.

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No Load Class Prospectus | Kinetics Internet Fund | Interest Rate Risk Member

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ª Foreign Securities Risks: The Internet Portfolio may invest in foreign securities directly or through ADRs, GDRs and IDRs. Foreign securities can carry higher returns but involve more risks than those associated with U.S. investments. Additional risks associated with investment in foreign securities include currency fluctuations, political and economic instability, less publicly available information, differences in financial reporting standards and less stringent regulation of securities markets. Foreign securities in which the Portfolio invests may be traded in markets that close before the time that the Portfolio calculates its NAV. Furthermore, certain foreign securities in which the Portfolio invests may be listed on foreign exchanges that trade on weekends or other days when the Portfolio does not calculate its NAV. As a result, the value of the Portfolio’s holdings may change on days when shareholders are not able to purchase or redeem the Internet Fund’s shares.

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No Load Class Prospectus | Kinetics Internet Fund | Internet Industry Concentration Risk Member

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ª Interest Rate Risk: The risk that when interest rates increase, fixed-income securities held by the Internet Portfolio will decline in value. Long-term fixed-income securities will normally have more price volatility because of this risk than short-term fixed-income securities. A low or negative interest rate environment could cause the Internet Portfolio's earnings to fall below the Portfolio's expense

ratio, resulting in a decline in the Portfolio's share price. A general rise in interest rates may cause investors to move out of fixed income securities on a large scale, which could adversely affect the price and liquidity of fixed income securities. The risks associated with changing interest rates may have unpredictable effects on the markets and the Internet Portfolio's investments.

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No Load Class Prospectus | Kinetics Internet Fund | Leveraging Risks Member

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ª Internet Industry Concentration Risks: Investing a substantial portion of the Internet Portfolio’s assets in the Internet industry carries the risk that Internet-related securities will decline in price due to Internet developments. Companies that conduct business on the Internet or derive a substantial portion of their revenues from Internet-related activities in general are subject to a rate of change in technology and competition which is generally higher than that of other industries.

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No Load Class Prospectus | Kinetics Internet Fund | Management Risks Member

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ª Leveraging Risks: Investments in derivative instruments may give rise to a form of leverage. The Investment Adviser may engage in speculative transactions, which involve substantial risk and leverage. The use of leverage by the Investment Adviser may increase the volatility of the Internet Portfolio. These leveraged instruments may result in losses to the Internet Portfolio or may adversely affect the Internet Portfolio’s NAV or total return, because instruments that contain leverage are more sensitive to changes in interest rates. The Internet Portfolio may also have to sell assets at inopportune times to satisfy its obligations in connection with such transactions.

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No Load Class Prospectus | Kinetics Internet Fund | Petroleum And Gas Sector Risk Member

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ª Management Risks: There is no guarantee that the Internet Fund will meet its investment objective. The Investment Adviser does not guarantee the performance of the Internet Fund, nor can it assure you that the market value of your investment will not decline.

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No Load Class Prospectus | Kinetics Internet Fund | Small And Medium-Size Company Risks Member

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ª Petroleum and Gas Sector Risk: The profitability of companies in the oil and gas industry is related to worldwide energy prices, exploration costs and production spending. Companies in the oil and gas industry may be at risk for environmental damage claims and other types of litigation. Companies in the oil and gas industry may be adversely affected by: natural disasters or other catastrophes; changes in exchange rates or interest rates; prices for competitive energy services, economic conditions, tax treatment, or government regulation; government intervention; negative public perception; or unfavorable events in the regions where companies operate (e.g., expropriation, nationalization, confiscation of assets and property, imposition of restrictions on foreign investments or repatriation of capital, military coups, social or political unrest, violence or labor unrest). Companies in the oil and gas industry may have significant capital investments in, or engage in transactions involving, emerging market countries, which may heighten these risks.

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No Load Class Prospectus | Kinetics Internet Fund | Stock Market Risks Member

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ª Small and Medium-Size Company Risks: The Internet Portfolio may invest in the equity securities of small and medium-size companies. Small and medium-size companies often have narrower markets and more limited managerial and financial resources than do larger, more established companies. As a result, their performance can be more volatile and they face a greater risk of business failure, which could increase the volatility of the Internet Portfolio’s assets.

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No Load Class Prospectus | Kinetics Internet Fund | Stock Selection Risks Member

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ª Stock Market Risks: Stock mutual funds are subject to stock market risks and significant fluctuations in value. If the stock market declines in value, the Internet Portfolio is likely to decline in value and you could lose money on your investment. Natural disasters, public health emergencies (including

epidemics and pandemics), geopolitical events, terrorism and other global unforeseeable events may lead to instability in world economies and markets, market volatility and may have adverse long-term effects.

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No Load Class Prospectus | Kinetics Internet Fund | Subsidiary Risks Member

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ª Stock Selection Risks: The portfolio securities selected by the Investment Adviser may decline in value or not increase in value when the stock market in general is rising and may fail to meet the Internet Portfolio’s, and therefore the Internet Fund’s, investment objective.

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No Load Class Prospectus | Kinetics Internet Fund | Tax Risks Member

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ª Subsidiary Risks: By investing in its Subsidiaries, the Internet Portfolio is indirectly exposed to the risks associated with each Subsidiary’s investments. Those investments held by the Subsidiaries are generally similar to the investments that are permitted to be held by the Internet Portfolio and are subject to the same risks that would apply to similar investments if held directly by the Internet Portfolio. Each Subsidiary is not registered under the 1940 Act and, unless otherwise noted in this Prospectus, is not subject to all the investor protections of the 1940 Act. In addition, changes in the laws of the United States, Delaware and/or the Cayman Islands could result in the inability of the Internet Portfolio and/or its Subsidiaries to continue to operate and could adversely affect the Internet Fund’s performance.

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No Load Class Prospectus | Kinetics Internet Fund | Valuation Risk Member

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ª Tax Risks: In order to qualify as a RIC, the Internet Fund must meet certain requirements regarding the source of its income, the diversification of its assets and the distribution of its income. Under the test regarding the source of a RIC’s income, at least 90% of the gross income of the RIC each year must be qualifying income, which consists of dividends, interest, gains on investments in securities and certain other categories of investment income. It appears to be the position of the Internal Revenue Service (the “IRS”) that gain realized on bitcoin investments such as investments in the Grayscale Bitcoin Trust will not be qualifying income. The Internet Portfolio’s investment in each Subsidiary is expected to provide the Internet Fund with exposure to such bitcoin investments within the limitations of the Internal Revenue Code for qualification as a RIC because, under applicable tax rules, the earnings of each Subsidiary will be qualifying income for the RIC when distributed by the Subsidiary even though the income would not be qualifying income if earned directly by the RIC or indirectly by an entity classified as a partnership for federal income tax purposes, such as the Internet Portfolio, in which the RIC invests. There is a risk, however, that the IRS might assert that the income derived from the Internet Portfolio’s investment in a Subsidiary will not be considered qualifying income. If the Internet Fund were to fail to qualify as a RIC and became subject to federal income tax, shareholders of the Internet Fund would be subject to diminished returns. Additionally, the Internet Fund invests, directly and indirectly, in entities that take the position that they are not subject to entity-level tax. If any such entity is reclassified as a corporation for U.S. federal income tax purposes, shareholders of the Internet Fund would be subject to diminished returns. Changes in the laws of the United States, Delaware and/or the Cayman Islands could result in the inability of the Internet Portfolio and/or its Subsidiaries to operate as described in this Prospectus and could adversely affect the Internet Fund. For example, the Cayman Islands does not currently impose any income, corporate or capital gains tax or withholding tax on the Cayman Subsidiary. If Cayman Islands law changes such that the Cayman Subsidiary must pay Cayman Islands taxes, Fund shareholders would likely suffer decreased investment returns.

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No Load Class Prospectus | Kinetics Internet Fund | Volatility Risk Member

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its investments may be impacted by technological issues and/or errors by pricing services or other third-party service providers. Shares of Grayscale Bitcoin Trust are intended to reflect the price of bitcoin assets, less fees and expenses, and shares of the Grayscale Bitcoin Trust have historically traded, and may continue to trade, at a significant discount or premium to net asset value. As such, the price of Grayscale Bitcoin Trust may go down even if the price of the underlying asset, bitcoin, remains unchanged. Additionally, shares that trade at a premium mean that an investor who purchases $1 of a portfolio will actually own less than $1 in assets.

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No Load Class Prospectus | Kinetics Internet Fund | S&P 500® Index (reflects no deductions for fees, expenses or taxes)

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ª Volatility Risk: The Portfolio may have investments, including but not limited to Bitcoin, that appreciate or depreciate significantly in value over short periods of time. This may cause the Portfolio’s net asset value per share to experience significant increases or declines in value over short periods of time.

Index No Deduction for Fees, Expenses, Taxes [Text]

rr_ProspectusLineItems

rr_IndexNoDeductionForFeesExpensesTaxes

(reflects no deductions for fees, expenses or taxes)

rr_AverageAnnualReturnLabel

S&P 500® Index (reflects no deductions for fees, expenses or taxes)

rr_AverageAnnualReturnYear01

26.29%

rr_AverageAnnualReturnYear05

15.69%

rr_AverageAnnualReturnYear10

12.03%

rr_AverageAnnualReturnSinceInception

9.26%

^[1]

No Load Class Prospectus | Kinetics Internet Fund | NASDAQ Composite® Index (reflects no deductions for fees, expenses or taxes)

rr_AverageAnnualReturnInceptionDate

Oct. 21, 1996

Index No Deduction for Fees, Expenses, Taxes [Text]

rr_ProspectusLineItems

rr_IndexNoDeductionForFeesExpensesTaxes

(reflects no deductions for fees, expenses or taxes)

rr_AverageAnnualReturnLabel

NASDAQ Composite® Index (reflects no deductions for fees, expenses or taxes)

rr_AverageAnnualReturnYear01

43.42%

rr_AverageAnnualReturnYear05

17.74%

rr_AverageAnnualReturnYear10

13.65%

rr_AverageAnnualReturnSinceInception

9.62%

^[1]

No Load Class Prospectus | Kinetics Internet Fund | No Load Class

rr_AverageAnnualReturnInceptionDate

Oct. 21, 1996

rr_ProspectusLineItems

Redemption Fee (as a percentage of Amount Redeemed)

dei_TradingSymbol

WWWFX

rr_RedemptionFeeOverRedemption

(2.00%)

^[2]

rr_ManagementFeesOverAssets

1.25%

^[2]

rr_DistributionAndService12b1FeesOverAssets

none

rr_Component1OtherExpensesOverAssets

0.25%

rr_Component2OtherExpensesOverAssets

0.25%

rr_OtherExpensesOverAssets

0.50%

rr_ExpensesOverAssets

1.75%

rr_ExpenseExampleYear01

$ 178

rr_ExpenseExampleYear03

551

rr_ExpenseExampleYear05

949

rr_ExpenseExampleYear10

$ 2,062

rr_AnnualReturn2014

(0.16%)

rr_AnnualReturn2015

(5.42%)

rr_AnnualReturn2016

2.59%

rr_AnnualReturn2017

57.43%

rr_AnnualReturn2018

(27.32%)

rr_AnnualReturn2019

26.45%

rr_AnnualReturn2020

56.42%

rr_AnnualReturn2021

15.35%

rr_AnnualReturn2022

(24.28%)

rr_AnnualReturn2023

29.76%

rr_AverageAnnualReturnLabel

Return Before Taxes

rr_AverageAnnualReturnYear01

29.76%

rr_AverageAnnualReturnYear05

17.52%

rr_AverageAnnualReturnYear10

9.53%

rr_AverageAnnualReturnSinceInception

13.81%

^[1]

No Load Class Prospectus | Kinetics Internet Fund | No Load Class | After Taxes on Distributions

rr_AverageAnnualReturnInceptionDate

Oct. 21, 1996

rr_ProspectusLineItems

rr_AverageAnnualReturnLabel

Return After Taxes on Distributions

rr_AverageAnnualReturnYear01

29.53%

rr_AverageAnnualReturnYear05

17.31%

rr_AverageAnnualReturnYear10

7.34%

No Load Class Prospectus | Kinetics Internet Fund | No Load Class | After Taxes on Distributions and Sales

rr_AverageAnnualReturnSinceInception

12.84%

^[1]

rr_ProspectusLineItems

rr_AverageAnnualReturnLabel

Return After Taxes on Distributions and Sale of Fund Shares (2)

^[3]

rr_AverageAnnualReturnYear01

17.78%

^[3]

rr_AverageAnnualReturnYear05

14.21%

^[3]

rr_AverageAnnualReturnYear10

6.88%

^[3]

No Load Class Prospectus | Kinetics Global Fund

rr_AverageAnnualReturnSinceInception

9.62%

^[1],[3]

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THE GLOBAL FUND

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Investment Objective

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The investment objective of the Global Fund is long-term growth of capital. The Global Fund is the sole “feeder fund” to The Global Portfolio, a series of Kinetics Portfolios Trust.

rr_ExpenseHeading

Fees and Expenses of the Fund

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This table describes the fees and expenses that you may pay if you buy, hold, and sell shares of the Global Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the table and example below.

rr_ShareholderFeesCaption

SHAREHOLDER FEES(fees paid directly from your investment)

Fee Waiver or Reimbursement over Assets, Date of Termination

rr_OperatingExpensesCaption

ANNUAL FUND OPERATING EXPENSES (expenses that you pay each year as a percentage of the value of your investment)

rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination

April 30, 2025

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Portfolio Turnover.

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The Global Portfolio pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the Example, affect the Global Portfolio’s, and therefore the Global Fund’s, performance. During the most recent fiscal year, the Global Portfolio’s portfolio turnover rate was 16% of the average value of its portfolio.

rr_PortfolioTurnoverRate

16.00%

rr_ExpensesRepresentBothMasterAndFeeder

This table and the example below reflect the aggregate expenses of the Global Fund and the Global Portfolio. The management fees paid by the Global Fund reflect the proportionate share of fees allocated to the Global Fund from the Global Portfolio. The fees and expenses of the Global Portfolio included those incurred by any subsidiary wholly-owned and controlled by the Global Portfolio.

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Example.

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This Example is intended to help you compare the cost of investing in No Load Class shares of the Global Fund with the cost of investing in other mutual funds. This Example assumes that you invest $10,000 in the Global Fund for the time periods indicated and then redeem all of your shares at the end of these periods. The Example also assumes that your investment has a 5% return each year and that the Global Fund’s operating expenses remain the same (taking into account the expense limitation only in the first year).

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Although your actual costs may be higher or lower, based on these assumptions your cost for the Global Fund would be:

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Principal Investment Strategy

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The Global Fund is a diversified fund that invests all of its investable assets in the Global Portfolio, a series of Kinetics Portfolios Trust. Under normal circumstances, the Global Portfolio invests at least 65% of its net assets plus any borrowings for investment purposes in common stocks, exchange-traded funds (“ETFs”), convertible securities, warrants and other equity securities having the characteristics of common stocks (such as American Depositary Receipts (“ADRs”), Global Depositary Receipts (“GDRs”) and International Depositary Receipts (“IDRs”)) of foreign and U.S. companies listed on publicly traded exchanges. At least 40% of the Global Portfolio’s net assets will be invested in companies located outside the United States. The Global Portfolio will at all times have exposure to at least three (3) countries, which may include the United States. The Global Portfolio may also purchase and write options for hedging purposes and/or direct investment and invest in participatory notes (commonly known as “P-notes”) to take positions in certain foreign securities.

The Global Portfolio may invest up to 20% of its total assets in convertible and non-convertible debt securities rated below investment grade, also known as junk bonds, or unrated securities that the Investment Adviser has determined to be of comparable quality. The Global Portfolio may invest up to 100% of its assets in companies located in emerging markets.

The Investment Adviser selects portfolio securities by evaluating a company’s positioning and business model as well as its ability to grow and expand its activities or achieve a greater competitive advantage in cost/profitability and brand image leveraging. This evaluation by the Investment Adviser includes consideration of a company’s potential to maintain and grow long lived assets, while generating high returns on capital with operating predictability and transparency. The Investment Adviser also considers a company’s fundamentals by reviewing its balance sheets, corporate revenues, earnings and dividends. The Global Portfolio may invest in companies of any size, including small and medium-sized companies. Additionally, the Global Portfolio may participate in securities lending arrangements up to 33-1/3% of the securities in its portfolio with brokers, dealers, and financial institutions (but not individuals) in order to increase the return on its portfolio.

The Global Portfolio may invest indirectly in bitcoin through a Delaware statutory trust, Grayscale Bitcoin Trust ETF (“Grayscale Bitcoin Trust”) and through other pooled investment vehicles that provide exposure to crypto assets. Certain of these vehicles may not be registered under the Investment Company Act of 1940, as amended (the “1940 Act”) and do not receive the protections of the 1940 Act. The Global Portfolio will not invest directly in Bitcoin or other crypto assets. Grayscale Bitcoin Trust is one of the first spot Bitcoin ETFs in the U.S. It enables investors to gain exposure to bitcoin in the form of a security while avoiding the challenges of buying, storing, and safekeeping bitcoin, directly. Bitcoins are a type of crypto assets that are not issued by a government, bank or central organization. Bitcoins exist on an online, peer-to-peer computer network (the “Bitcoin Network”) that hosts a public transaction ledger where bitcoin transfers are recorded (the “Blockchain”). Bitcoins have no physical existence beyond the record of transactions on the Blockchain. The Grayscale Bitcoin Trust invests principally in bitcoins. The Global Portfolio held 41.84% of its net assets in the Grayscale Bitcoin Trust as of March 31, 2024. The Global Portfolio may also invest in other pooled investment vehicles that provide exposure to the spot

price of crypto assets. For example, the Global Portfolio may invest in the Grayscale Ethereum Classic Trust. The amount of the Global Portfolio’s investment in crypto assets may be limited by law or by tax considerations.

The Global Portfolio contributed a portion of its holdings in the Grayscale Bitcoin Trust to a wholly-owned and controlled subsidiary organized under the laws of the Cayman Islands (the “Cayman Subsidiary”).

The Global Portfolio is also the sole shareholder of a wholly owned subsidiary organized under Delaware law (the “Delaware Subsidiary”). The Global Portfolio contributed a portion of its holdings in the Grayscale Bitcoin Trust to the Delaware Subsidiary. Any net gains that the Delaware Subsidiary recognizes on future sales of the contributed Grayscale Bitcoin Trust shares will be subject to federal and state corporate income tax, but the dividends that the Delaware Subsidiary pays to the Global Portfolio (i.e., those gains, net of the tax paid and any other expenses of the Delaware Subsidiary, such as its management and advisory fees) will be eligible to be treated as “qualified dividend income” under the Internal Revenue Code of 1986, as amended (the “Internal Revenue Code”). The Delaware Subsidiary and the Cayman Subsidiary are each referred to herein as a “Subsidiary” and collectively as “Subsidiaries.” Additional information regarding the tax treatment of the Fund is provided in the “Taxes” section of the SAI.

In the future, the Global Portfolio may seek to gain additional exposure to the Grayscale Bitcoin Trust that may not produce qualifying income for the Global Fund under the Internal Revenue Code if held directly. The Global Portfolio will not make any additional investments in the Grayscale Bitcoin Trust if as a result of such investment, its aggregate investment in the Grayscale Bitcoin Trust, either directly or through a Subsidiary, would be more than 15% of its assets at the time of the investment. However, the Portfolio’s investment in the Grayscale Bitcoin Trust may, at times, exceed 15% of its net assets, due to appreciation.

Each Subsidiary invests primarily in the Grayscale Bitcoin Trust. The Global Portfolio will invest in its Subsidiaries in a manner that is consistent with the limitations of the federal tax laws, rules and regulations that apply to the Global Fund as a “regulated investment company” (“RIC”) under Subchapter M of Subtitle A, Chapter 1, of the Internal Revenue Code (“Subchapter M”). However, the Global Portfolio and each Subsidiary comply with the same fundamental investment restrictions on an aggregate basis, to the extent those restrictions are applicable to the investment activities of each Subsidiary. Each Subsidiary also complies with Section 17 of the 1940 Act relating to affiliated transactions and custody, and the Investment Adviser complies with Section 15 of the 1940 Act relating to investment advisory contracts with respect to the Subsidiaries. Unlike the Global Fund, each Subsidiary does not, and will not, seek to qualify as a RIC. The Global Portfolio is the sole shareholder of each Subsidiary and does not expect shares of the Subsidiaries to be offered or sold to other investors. The Subsidiaries include entities that engage in investment activities in securities or other assets that are primarily controlled by the Global Portfolio. The Global Portfolio does not intend to create or acquire primary control of any entity which primarily engages in investment activities in securities or other assets other than entities wholly-owned by the Global Portfolio.

The Global Portfolio may maintain during a temporary period, which could be for a short period or a longer period lasting several years or more, of abnormal conditions, a significant portion of its total assets in cash and securities, generally considered to be cash and cash equivalents, including, but not limited to: high quality, U.S. short-term debt securities and money market instruments. The Investment Adviser will invest in such short-term cash positions to the extent that the Investment Adviser is unable to find sufficient investments meeting its criteria and when the Investment Adviser believes the purchase of additional equity securities would not further the investment objective of the Global Portfolio during such periods of time. Additionally, to respond to adverse market, economic, political or other conditions, which may persist for short or long periods of time, the Global Portfolio may invest up to 100% of its assets in the types of high quality, U.S. short-term debt securities and money market instruments described above.

If the market advances during periods when the Global Portfolio is holding a large cash position, the Portfolio may not participate as much as it would have if it had been more fully invested in securities. In the aforementioned temporary defensive periods, the Investment Adviser believes that an additional amount of liquidity in the Global Portfolio is desirable both to meet operating requirements and to take advantage of new investment opportunities. When the Global Portfolio holds a significant portion of assets in cash and cash equivalents, it may not meet its investment objective.

The Global Portfolio held 21.55% of its net assets in the Texas Pacific Land Corporation (the “Land Corporation”) as of March 31, 2024. The Land Corporation is a corporation organized under the laws of the state of New York. One of the largest land owners in Texas, the Land Corporation derives most of its income from oil and gas royalty revenue, land easements and water royalties and sales. The Land Corporation has historically operated with minimal operating expenses, little to no debt and utilized cash flow to return capital to unitholders through share repurchases and dividends. While the Land Corporation has held the majority of its assets since its formation in 1888, the development of energy resources subject to its royalty interests and related land use have experienced rapid growth in recent years due to advances in energy exploration and extraction technologies.

rr_StrategyPortfolioConcentration

Under normal circumstances, the Global Portfolio invests at least 65% of its net assets plus any borrowings for investment purposes in common stocks, exchange-traded funds (“ETFs”), convertible securities, warrants and other equity securities having the characteristics of common stocks (such as American Depositary Receipts (“ADRs”), Global Depositary Receipts (“GDRs”) and International Depositary Receipts (“IDRs”)) of foreign and U.S. companies listed on publicly traded exchanges. At least 40% of the Global Portfolio’s net assets will be invested in companies located outside the United States. The Global Portfolio will at all times have exposure to at least three (3) countries, which may include the United States. The Global Portfolio may also purchase and write options for hedging purposes and/or direct investment and invest in participatory notes (commonly known as “P-notes”) to take positions in certain foreign securities. The Global Portfolio may invest up to 20% of its total assets in convertible and non-convertible debt securities rated below investment grade, also known as junk bonds, or unrated securities that the Investment Adviser has determined to be of comparable quality. The Global Portfolio may invest up to 100% of its assets in companies located in emerging markets.

rr_RiskHeading

Principal Investment Risks

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Performance

Performance Information Illustrates Variability of Returns [Text]

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The bar chart and table shown below illustrate the variability of the Global Fund’s returns. The bar chart indicates the risks of investing in the Global Fund by showing the changes in the Global Fund’s performance from year to year (on a calendar year basis). The table shows how the Global Fund’s average annual returns, before and after taxes, compare with those of the S&P® 500 Index and the MSCI ACWI (All Country World Index) Index (“MSCI ACWI Index”), which represent broad measures of market performance. As of March 14, 2008, the Global Fund and the Global Portfolio, which were formerly known as the Internet Emerging Growth Fund and the Internet Emerging Growth Portfolio, respectively, changed to the investment strategy set forth in this Prospectus. The performance shown for the periods or portion of periods prior to March 14, 2008 represents performance of the Global Portfolio’s prior strategy to invest at least 80% of its net assets plus any borrowings for investment purposes in equity securities of small and medium-capitalization U.S. and foreign companies engaged in the Internet and Internet-related

activities. The past performance of the Global Fund, before and after taxes, is not necessarily an indication of how the Global Fund or the Global Portfolio will perform in the future. Performance reflects fee waivers in effect. If fee waivers were not in place, the Global Fund’s performance would be reduced. Updated performance information is available on the Fund’s website at http://www.kineticsfunds.com or by calling the Fund toll-free at (800) 930-3828.

rr_PerformanceInformationIllustratesVariabilityOfReturns

The bar chart and table shown below illustrate the variability of the Global Fund’s returns.

rr_PerformanceAvailabilityPhone

(800) 930-3828

rr_PerformanceAvailabilityWebSiteAddress

http://www.kineticsfunds.com

rr_PerformancePastDoesNotIndicateFuture

The past performance of the Global Fund, before and after taxes, is not necessarily an indication of how the Global Fund or the Global Portfolio will perform in the future.

rr_BarChartHeading

The Global Fund – No Load ClassCalendar Year Returns as of 12/31

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Best Quarter:	Q4 2020	30.71	%
Worst Quarter:	Q4 2018	-18.32	%

rr_HighestQuarterlyReturnLabel

Best Quarter:

rr_BarChartHighestQuarterlyReturnDate

Dec. 31, 2020

rr_BarChartHighestQuarterlyReturn

30.71%

rr_LowestQuarterlyReturnLabel

Worst Quarter:

rr_BarChartLowestQuarterlyReturnDate

Dec. 31, 2018

rr_BarChartLowestQuarterlyReturn

(18.32%)

rr_PerformanceTableHeading

Average Annual Total Returns as of 12/31/2023

rr_PerformanceTableUsesHighestFederalRate

rr_PerformanceTableNotRelevantToTaxDeferred

If you own Fund shares in a tax-deferred account, such as a 401(k) plan or an individual retirement account (“IRA”), the information on after-tax returns is not relevant to your investment.

rr_PerformanceTableExplanationAfterTaxHigher

The Return After Taxes on Distributions and Sale of Fund Shares is higher than other return figures when a capital loss occurs upon the redemption of Fund shares.

No Load Class Prospectus | Kinetics Global Fund | Risk Lose Money [Member]

rr_PerformanceTableNarrativeTextBlock

The Global Fund’s after-tax returns as shown in the following table are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Your actual after-tax returns depend on your tax situation and may differ from those shown. If you own Fund shares in a tax-deferred account, such as a 401(k) plan or an individual retirement account (“IRA”), the information on after-tax returns is not relevant to your investment. The Return After Taxes on Distributions and Sale of Fund Shares is higher than other return figures when a capital loss occurs upon the redemption of Fund shares.

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No Load Class Prospectus | Kinetics Global Fund | Crypto Asset Exposure Risk Member

rr_RiskTextBlock

The Global Portfolio’s investments, including common stocks, have inherent risks that could cause you to lose money.

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No Load Class Prospectus | Kinetics Global Fund | Crypto Asset Industry Risk Member

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bitcoins, which are recorded on a public transaction ledger known as a Blockchain. The Fund may invest indirectly in bitcoin through the Grayscale Bitcoin Trust and through other pooled investment vehicles that provide exposure to crypto assets. Grayscale Bitcoin Trust is one of the first spot Bitcoin ETFs in the U.S. It enables investors to gain exposure to bitcoin in the form of a security while avoiding the challenges of buying, storing, and safekeeping bitcoin, directly.

In addition to the general risks of investing in other investment vehicles, the value of the Global Portfolio’s indirect investments in crypto assets are subject to fluctuations in the value of the crypto asset, which can be highly volatile. The value of crypto assets is determined by the supply and demand for crypto assets in the global market for the trading of crypto assets, which consists primarily of transactions on crypto asset trading platforms. The value of crypto assets has been, and may continue to be, substantially dependent on speculation, such that trading and investing in crypto assets generally may not be based on fundamental analysis. The Global Portfolio’s exposure to crypto assets can result in substantial losses to the Global Fund.

Crypto assets trade on crypto asset trading platforms, which are largely unregulated and may therefore be more exposed to fraud and failure than established, regulated exchanges for securities, derivatives and other currencies. These crypto asset trading platforms can cease operating temporarily or even permanently, resulting in the potential loss of users’ crypto assets or other market disruptions. Crypto asset trading platforms may be more exposed to the risk of market manipulation than exchanges for more traditional assets. Individuals or organizations holding a large amount of crypto assets in which the Global Portfolio may invest indirectly (also known as “whales”) may have the ability to manipulate the prices of those crypto assets. Crypto asset trading platforms on which crypto assets are traded are or may become subject to enforcement actions by regulatory authorities. Crypto asset trading platforms that are regulated typically must comply with minimum net worth, cybersecurity, and anti-money laundering requirements, but are not typically required to protect customers or their markets to the same extent that regulated securities exchanges or futures exchanges are required to do so. Furthermore, crypto asset trading platforms may be operating out of compliance with regulations and many crypto asset trading platforms lack certain safeguards established by more traditional exchanges to enhance the stability of trading on the exchange, such as measures designed to prevent sudden drops in value of items traded on the exchange (i.e., “flash crashes”). As a result, the prices of crypto assets on crypto asset trading platforms may be subject to larger and more frequent sudden declines than assets traded on more traditional exchanges.

rr_ProspectusLineItems

No Load Class Prospectus | Kinetics Global Fund | Crypto Asset Regulatory Risk Member

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globe, following which the U.S. Department of Justice brought criminal fraud and other charges, and the SEC and CFTC brought civil securities and commodities fraud charges, against certain of FTX’s and its affiliates’ senior executives, including its former CEO. In addition, several other entities in the crypto asset industry filed for bankruptcy following FTX’s bankruptcy filing, such as BlockFi Inc. and Genesis Global Capital, LLC. In response to these events, the prices of crypto assets have experienced extreme volatility and other entities in the crypto asset industry have been, and may continue to be, negatively affected, further undermining confidence in the crypto asset industry. These events are continuing to develop and the full facts are continuing to emerge. It is not possible to predict at this time all of the risks that they may pose to the Global Portfolio, and therefore the Global Fund, its service providers or to the crypto asset industry as a whole.

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No Load Class Prospectus | Kinetics Global Fund | Single Stock Concentration Risk Member

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ª Crypto Asset Regulatory Risk: Crypto asset markets in the U.S. exist in a state of regulatory uncertainty. Regulatory changes or actions by Congress as well as U.S. federal or state agencies may adversely affect the value of the Global Portfolio’s indirect investments in crypto assets. As digital assets have grown in both popularity and market size, a number of state and federal agencies have issued consumer advisories regarding the risks posed by digital assets to investors. In addition, the Securities and Exchange Commission, U.S. state securities regulators and several foreign governments have issued warnings and instituted legal proceedings in which they argue that certain digital assets may be classified as securities and that both those digital assets and any related initial coin offerings are subject to securities regulations. Additionally, U.S. state and federal, and foreign regulators and legislatures have taken action against virtual currency businesses or enacted restrictive regimes in response to adverse publicity arising from hacks, consumer harm, or criminal activity stemming from virtual currency activity.

Currently, there is relatively limited use of crypto assets in the retail and commercial marketplace, which contributes to price volatility. A lack of expansion by crypto assets into retail and commercial markets, or a contraction of such use, may result in increased volatility or a reduction in the value of crypto assets, either of which could adversely impact the value of the Global Portfolio’s investment. In addition, to the extent market participants develop a preference for one crypto asset over another, the value of the less preferred crypto assets would likely be adversely affected.

The Global Portfolio’s exposure to crypto assets may change over time and, accordingly, such exposure may not be represented in the Global Portfolio’s portfolio at any given time. Many significant aspects of the tax treatment of investments in crypto assets are uncertain, and a direct or indirect investment in crypto assets may produce non-qualifying income. Crypto assets are a new technological innovation with a limited history; it is a highly speculative asset and future regulatory

actions or policies may limit, perhaps to a materially adverse extent, the value of the Global Portfolio’s indirect investment in crypto assets and the ability to exchange a crypto asset or utilize it for payments.

rr_ProspectusLineItems

No Load Class Prospectus | Kinetics Global Fund | Liquidity Risks Member

rr_RiskTextBlock

ª Single Stock Concentration Risk: The Global Portfolio may hold a large concentration of its net assets in a single security or issuer. Holding a large concentration in a single security or issuer may expose the portfolio to the market volatility of that specific security or issuer if the security or issuer performs worse than the market as a whole, which could adversely affect the Portfolio’s performance.

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No Load Class Prospectus | Kinetics Global Fund | Below Investment Grade Debt Securities Risk Member

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No Load Class Prospectus | Kinetics Global Fund | Sector Concentration Risk Member

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rr_ProspectusLineItems

No Load Class Prospectus | Kinetics Global Fund | Convertible Securities Risks Member

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ª Sector Concentration Risk: Although the Global Portfolio will not concentrate its investments in any industries, the Global Portfolio may, at certain times, have concentrations in one or more sectors which may cause the Portfolio to be more sensitive to economic changes or events occurring in those sectors, and the Portfolio's investments may be more volatile. As of December 31, 2023, the Portfolio had 28.47% invested in the Mining, Quarrying and Oil & Gas Extraction sector.

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No Load Class Prospectus | Kinetics Global Fund | Counterparty Risks Member

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ª Convertible Securities Risks: Convertible securities are subject to the risks affecting both equity and fixed income securities, including market, credit, liquidity and interest rate risk.

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No Load Class Prospectus | Kinetics Global Fund | Emerging Markets Risks Member

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ª Counterparty Risks: Transactions involving a counterparty are subject to the credit risk of the counterparty. A Portfolio that enters into contracts with counterparties, such as repurchase or reverse repurchase agreements or over-the-counter (“OTC”) derivatives contracts, or that lends its securities run the risk that the counterparty will be unable or unwilling to make timely settlement payments or otherwise honor its obligations. If a counterparty fails to meet its contractual obligations, goes bankrupt, or otherwise experiences a business interruption, the Portfolio could suffer losses, including monetary losses, miss investment opportunities or be forced to hold investments it would prefer to sell. Counterparty risk is heightened during unusually adverse market conditions.

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No Load Class Prospectus | Kinetics Global Fund | Exchange-Traded Funds (ETFs) Risks Member

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ª Emerging Markets Risks: The risk that the securities markets of emerging countries are less liquid, are especially subject to greater price volatility, have smaller market capitalizations, have less government regulation and are not subject to as extensive and frequent accounting, financial and other reporting requirements as the securities markets of more developed countries as have historically been the case. The information available about an emerging market issuer may be less reliable than for comparable issuers in more developed capital markets. In addition, investments in certain emerging markets are subject to an elevated risk of loss resulting from market manipulation and the imposition of exchange controls (including repatriation restrictions). The legal rights and remedies available for investors in emerging markets may be more limited than the rights and

remedies available in the U.S., and the ability of U.S. authorities (e.g., SEC and the U.S. Department of Justice) to bring actions against bad actors in emerging markets may be limited.

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No Load Class Prospectus | Kinetics Global Fund | Foreign Securities Risks Member

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ª Exchange-Traded Funds (ETFs) Risks: ETFs are registered investment companies whose shares are listed and traded on U.S. stock exchanges or otherwise traded in the over-the-counter market. In general, passively-managed ETFs seek to track a specified securities index or a basket of securities that an “index provider,” such as S&P Global, selects as representative of a market, market segment or industry sector. A passively-managed ETF is designed so that its performance will correspond closely with that of the index it tracks. A leveraged ETF will engage in transactions and purchase instruments that give rise to forms of leverage, including, among others, the use of reverse repurchase agreements and other borrowings, the investment of collateral from loans of portfolio securities, the use of when issued, delayed-delivery or forward commitment transactions or short sales. To the extent a fund invests in ETFs that achieve leveraged exposure to their underlying indexes through the use of derivative instruments, the fund will indirectly be subject to leveraging risk. As a shareholder in an ETF, the Global Portfolio will bear its pro rata portion of an ETF’s expenses, including advisory fees, in addition to its own expenses. The existence of extreme market volatility or potential lack of an active trading market for an ETF’s shares could result in such shares trading at a significant premium or discount to their NAV.

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No Load Class Prospectus | Kinetics Global Fund | Interest Rate Risk Member

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ª Foreign Securities Risks: The Global Portfolio may invest in foreign securities directly or through ADRs, GDRs and IDRs. Foreign securities can carry higher returns but involve more risks than those associated with U.S. investments. Additional risks associated with investment in foreign securities include currency fluctuations, political and economic instability, less publicly available information, differences in financial reporting standards and less stringent regulation of securities markets. Foreign securities in which the Portfolio invests may be traded in markets that close before the time that the Portfolio calculates its NAV. Furthermore, certain foreign securities in which the Portfolio invests may be listed on foreign exchanges that trade on weekends or other days when the Portfolio does not calculate its NAV. As a result, the value of the Portfolio’s holdings may change on days when shareholders are not able to purchase or redeem the Global Fund’s shares.

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No Load Class Prospectus | Kinetics Global Fund | Leveraging Risks Member

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ª Interest Rate Risk: The risk that when interest rates increase, fixed-income securities held by the Global Portfolio will decline in value. Long-term fixed-income securities will normally have more price volatility because of this risk than short-term fixed-income securities. A low or negative interest rate environment could cause the Global Portfolio's earnings to fall below the Portfolio's expense ratio, resulting in a decline in the Portfolio's share price. A general rise in interest rates may cause investors to move out of fixed income securities on a large scale, which could adversely affect the price and liquidity of fixed income securities. The risks associated with changing interest rates may have unpredictable effects on the markets and the Global Portfolio's investments.

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No Load Class Prospectus | Kinetics Global Fund | Management Risks Member

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ª Leveraging Risks: Investments in derivative instruments may give rise to a form of leverage. The Investment Adviser may engage in speculative transactions, which involve substantial risk and leverage. The use of leverage by the Investment Adviser may increase the volatility of the Global Portfolio. These leveraged instruments may result in losses to the Global Portfolio or may adversely affect the Global Portfolio’s NAV or total return, because instruments that contain leverage are more sensitive to changes in interest rates. The Global Portfolio may also have to sell assets at inopportune times to satisfy its obligations in connection with such transactions.

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No Load Class Prospectus | Kinetics Global Fund | Petroleum And Gas Sector Risk Member

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ª Management Risks: There is no guarantee that the Global Fund will meet its investment objective. The Investment Adviser does not guarantee the performance of the Global Fund, nor can it assure you that the market value of your investment will not decline.

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No Load Class Prospectus | Kinetics Global Fund | Small And Medium-Size Company Risks Member

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No Load Class Prospectus | Kinetics Global Fund | Stock Market Risks Member

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ª Small and Medium-Size Company Risks: The Global Portfolio may invest in the equity securities of small and medium-size companies. Small and medium-size companies often have narrower markets and more limited managerial and financial resources than do larger, more established companies. As a result, their performance can be more volatile and they face a greater risk of business failure, which could increase the volatility of the Global Portfolio’s assets.

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No Load Class Prospectus | Kinetics Global Fund | Stock Selection Risks Member

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ª Stock Market Risks: Stock mutual funds are subject to stock market risks and significant fluctuations in value. If the stock market declines in value, the Global Portfolio, and therefore the Global Fund, is likely to decline in value and you could lose money on your investment. Natural disasters, public health emergencies (including epidemics and pandemics), geopolitical events, terrorism and other global unforeseeable events may lead to instability in world economies and markets, market volatility and may have adverse long-term effects.

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No Load Class Prospectus | Kinetics Global Fund | Subsidiary Risks Member

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ª Stock Selection Risks: The portfolio securities selected by the Investment Adviser may decline in value or not increase in value when the stock market in general is rising and may fail to meet the Global Portfolio’s, and therefore the Global Fund’s, investment objective.

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No Load Class Prospectus | Kinetics Global Fund | Tax Risks Member

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ª Subsidiary Risks: By investing in its Subsidiaries, the Global Portfolio is indirectly exposed to the risks associated with each Subsidiary’s investments. Those investments held by the Subsidiaries are generally similar to the investments that are permitted to be held by the Global Portfolio and are subject to the same risks that would apply to similar investments if held directly by the Global Portfolio. Each Subsidiary is not registered under the 1940 Act and, unless otherwise noted in this Prospectus, is not subject to all the investor protections of the 1940 Act. In addition, changes in the laws of the United States, Delaware and/or the Cayman Islands could result in the inability of the Global Portfolio and/or its Subsidiaries to continue to operate and could adversely affect the Global Fund’s performance.

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No Load Class Prospectus | Kinetics Global Fund | Valuation Risk Member

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ª Tax Risks: In order to qualify as a RIC, the Global Fund must meet certain requirements regarding the source of its income, the diversification of its assets and the distribution of its income. Under the test regarding the source of a RIC’s income, at least 90% of the gross income of the RIC each year must be qualifying income, which consists of dividends, interest, gains on investments in securities and certain other categories of investment income. It appears to be the position of the Internal Revenue Service (the “IRS”) that gain realized on bitcoin investments such as investments in the Grayscale Bitcoin Trust will not be qualifying income. The Global Portfolio’s investment in each Subsidiary is expected to provide the Global Fund with exposure to such bitcoin investments within the limitations of the Internal Revenue Code for qualification as a RIC because, under applicable tax rules, the earnings of each Subsidiary will be qualifying income for the RIC when distributed by the Subsidiary even though the income would not be qualifying income if earned directly by the RIC or directly by an entity classified as a partnership for federal income tax purposes, such as the Global Portfolio, in which the RIC invests. There is a risk, however, that the IRS might assert that the income derived from the Global Portfolio’s investment in a Subsidiary will not be considered qualifying income. If the Global Fund were to fail to qualify as a RIC and became subject to federal income tax, shareholders of the Global Fund would be subject to diminished returns. Additionally, the Global Fund invests, directly and indirectly, in entities that take the position that they are not subject to

entity-level tax. If any such entity is reclassified as a corporation for U.S. federal income tax purposes, shareholders of the Global Fund would be subject to diminished returns. Changes in the laws of the United States, Delaware and/or the Cayman Islands could result in the inability of the Global Portfolio and/or its Subsidiaries to operate as described in this Prospectus and could adversely affect the Global Fund. For example, the Cayman Islands does not currently impose any income, corporate or capital gains tax or withholding tax on the Cayman Subsidiary. If Cayman Islands law changes such that the Cayman Subsidiary must pay Cayman Islands taxes, Global Fund shareholders would likely suffer decreased investment returns.

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No Load Class Prospectus | Kinetics Global Fund | Volatility Risk Member

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ª Valuation Risk: The sales price the Portfolio could receive for any particular portfolio investment may differ from the Portfolio’s valuation of the investment, particularly for securities or other investments, such as Bitcoin, that trade in thin or volatile markets or that are valued using a fair value methodology. Valuation may be more difficult in times of market turmoil since many investors and market makers may be reluctant to purchase complex instruments or quote prices for them. Fair valuation of the Portfolio’s investments involves subjective judgment. The Portfolio’s ability to value its investments may be impacted by technological issues and/or errors by pricing services or other third-party service providers. Shares of Grayscale Bitcoin Trust are intended to reflect the price of bitcoin assets, less fees and expenses, and the shares of the Grayscale Bitcoin Trust have historically traded, and may continue to trade, at a significant discount or premium to net asset value. As such, the price of Grayscale Bitcoin Trust may go down even if the price of the underlying asset, bitcoin, remains unchanged. Additionally, shares that trade at a premium mean that an investor who purchases $1 of a portfolio will actually own less than $1 in assets.

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No Load Class Prospectus | Kinetics Global Fund | S&P 500® Index (reflects no deductions for fees, expenses or taxes)

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Index No Deduction for Fees, Expenses, Taxes [Text]

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rr_IndexNoDeductionForFeesExpensesTaxes

(reflects no deductions for fees, expenses or taxes)

rr_AverageAnnualReturnLabel

S&P 500® Index (reflects no deductions for fees, expenses or taxes)

rr_AverageAnnualReturnYear01

26.29%

rr_AverageAnnualReturnYear05

15.69%

rr_AverageAnnualReturnYear10

12.03%

rr_AverageAnnualReturnSinceInception

7.03%

^[4]

No Load Class Prospectus | Kinetics Global Fund | MSCI ACWI Index (reflects no deductions for fees, expenses or taxes)

rr_AverageAnnualReturnInceptionDate

Dec. 31, 1999

Index No Deduction for Fees, Expenses, Taxes [Text]

rr_ProspectusLineItems

rr_IndexNoDeductionForFeesExpensesTaxes

(reflects no deductions for fees, expenses or taxes)

rr_AverageAnnualReturnLabel

MSCI ACWI Index (reflects no deductions for fees, expenses or taxes)

rr_AverageAnnualReturnYear01

22.20%

rr_AverageAnnualReturnYear05

11.72%

rr_AverageAnnualReturnYear10

7.93%

rr_AverageAnnualReturnSinceInception

5.14%

^[4]

No Load Class Prospectus | Kinetics Global Fund | No Load Class

rr_AverageAnnualReturnInceptionDate

Dec. 31, 1999

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Redemption Fee (as a percentage of Amount Redeemed)

dei_TradingSymbol

WWWEX

rr_RedemptionFeeOverRedemption

(2.00%)

^[5]

rr_ManagementFeesOverAssets

1.25%

^[5]

rr_DistributionAndService12b1FeesOverAssets

none

rr_Component1OtherExpensesOverAssets

0.25%

rr_Component2OtherExpensesOverAssets

0.63%

rr_OtherExpensesOverAssets

0.88%

rr_ExpensesOverAssets

2.13%

rr_FeeWaiverOrReimbursementOverAssets

(0.74%)

^[6]

rr_NetExpensesOverAssets

1.39%

rr_ExpenseExampleYear01

$ 142

rr_ExpenseExampleYear03

596

rr_ExpenseExampleYear05

1,076

rr_ExpenseExampleYear10

$ 2,404

rr_AnnualReturn2014

(11.89%)

rr_AnnualReturn2015

(13.83%)

rr_AnnualReturn2016

14.40%

rr_AnnualReturn2017

49.20%

rr_AnnualReturn2018

(23.58%)

rr_AnnualReturn2019

21.61%

rr_AnnualReturn2020

25.00%

rr_AnnualReturn2021

16.32%

rr_AnnualReturn2022

(6.46%)

rr_AnnualReturn2023

11.89%

rr_AverageAnnualReturnLabel

Return Before Taxes

rr_AverageAnnualReturnYear01

11.89%

rr_AverageAnnualReturnYear05

13.10%

rr_AverageAnnualReturnYear10

6.25%

rr_AverageAnnualReturnSinceInception

1.46%

^[4]

No Load Class Prospectus | Kinetics Global Fund | No Load Class | After Taxes on Distributions

rr_AverageAnnualReturnInceptionDate

Dec. 31, 1999

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rr_AverageAnnualReturnLabel

Return After Taxes on Distributions

rr_AverageAnnualReturnYear01

10.88%

rr_AverageAnnualReturnYear05

12.56%

rr_AverageAnnualReturnYear10

5.74%

No Load Class Prospectus | Kinetics Global Fund | No Load Class | After Taxes on Distributions and Sales

rr_AverageAnnualReturnSinceInception

1.03%

^[4]

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rr_AverageAnnualReturnLabel

Return After Taxes on Distributions and Sale of Fund Shares

rr_AverageAnnualReturnYear01

7.14%

rr_AverageAnnualReturnYear05

10.33%

rr_AverageAnnualReturnYear10

4.87%

No Load Class Prospectus | Kinetics Paradigm Fund

rr_AverageAnnualReturnSinceInception

0.98%

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THE PARADIGM FUND

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Investment Objective

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The investment objective of the Paradigm Fund is long-term growth of capital.

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Fees and Expenses of the Fund

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This table describes the fees and expenses that you may pay if you buy, hold, and sell shares of the Paradigm Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the table and example below.

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SHAREHOLDER FEES(fees paid directly from your investment)

Fee Waiver or Reimbursement over Assets, Date of Termination

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ANNUAL FUND OPERATING EXPENSES (expenses that you pay each year as a percentage of the value of your investment)

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April 30, 2025

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Portfolio Turnover.

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The Paradigm Portfolio pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the Example, affect the Paradigm Portfolio’s, and therefore the Paradigm Fund’s, performance. During the most recent fiscal year, the Paradigm Portfolio’s portfolio turnover rate was 0% of the average value of its portfolio.

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none

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This table and the example below reflect the aggregate expenses of the Paradigm Fund and the Paradigm Portfolio. The management fees paid by the Paradigm Fund reflect the proportionate share of fees allocated to the Paradigm Fund from the Paradigm Portfolio. The fees and expenses of the Paradigm Portfolio included those incurred by any subsidiary wholly-owned and controlled by the Paradigm Portfolio.

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Example.

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This Example is intended to help you compare the cost of investing in the Paradigm Fund with the cost of investing in other mutual funds. This Example assumes that you invest $10,000 in the Paradigm Fund for the time periods indicated and then redeem all of your shares at the end of these periods. The Example also assumes that your investment has a 5% return each year and that the Paradigm Fund’s operating expenses remain the same (taking into account the expense limitation only in the first year).

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Although your actual costs may be higher or lower, based on these assumptions your cost for the Paradigm Fund would be:

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Principal Investment Strategy

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The Paradigm Fund is a non-diversified fund that invests all of its investable assets in the Paradigm Portfolio, a series of Kinetics Portfolios Trust. Under normal circumstances, the Paradigm Portfolio invests at least 65% of its net assets in common stocks, exchange-traded funds (“ETFs”), convertible securities, warrants, and other equity securities having the characteristics of common stocks (such as American Depositary Receipts (“ADRs”), Global Depositary Receipts (“GDRs”) and International Depositary Receipts (“IDRs”)) of U.S. and foreign companies that the Investment Adviser believes are undervalued, that have, or are expected to soon have, high returns on equity and that are well positioned to reduce their costs, extend the reach of their distribution channels and experience significant growth in their assets or revenues. The Paradigm Portfolio will carry out its investment strategy by regarding investments as representing fractional ownership in the underlying companies’ assets. This will allow the Paradigm Portfolio, and therefore the Paradigm Fund, to attempt to achieve its investment objective by acting as a classic value investor seeking high returns on equity, an intrinsic characteristic of the investment, not a reappraisal of a company’s stock value by the market, an external factor. The Paradigm Portfolio may also purchase and write options for hedging purposes and/or direct investment.

The Paradigm Portfolio may invest up to 20% of its total assets in convertible and non-convertible debt securities rated below investment grade, also known as junk bonds, or unrated securities that the Investment Adviser has determined to be of comparable quality. The Paradigm Portfolio may invest up to 100% of its total assets in companies located in emerging markets.

The Investment Adviser selects portfolio securities by evaluating a company’s positioning and traditional business lines as well as its ability to expand its activities or achieve competitive advantage in cost/profitability and brand image leveraging. The Investment Adviser also considers a company’s fundamentals by reviewing its balance sheets, corporate revenues, earnings and dividends. The Paradigm Portfolio may invest in companies of any size, including small and medium-size companies. Additionally, the Paradigm Portfolio may participate in securities lending arrangements up to 33-1/3% of the securities in its portfolio with brokers, dealers, and financial institutions (but not individuals) in order to increase the return on its portfolio.

The Paradigm Portfolio may invest indirectly in bitcoin through a Delaware statutory trust, Grayscale Bitcoin Trust ETF (“Grayscale Bitcoin Trust”) and through other pooled investment vehicles that provide exposure to crypto assets. Certain of these vehicles may not be registered under the Investment Company Act of 1940, as amended (the “1940 Act”) and do not receive the protections of the 1940 Act. The Paradigm Portfolio will not invest directly in Bitcoin or other crypto assets. Grayscale Bitcoin Trust is one of the first spot Bitcoin ETFs in the U.S. It enables investors to gain exposure to bitcoin in the form of a security while avoiding the challenges of buying, storing, and safekeeping bitcoin, directly. Bitcoins are a type of crypto assets that are not issued by a government, bank or central organization. Bitcoins exist on an online, peer-to-peer computer network (the “Bitcoin Network”) that hosts a public transaction ledger where bitcoin transfers are recorded (the “Blockchain”). Bitcoins have no physical existence beyond the record of transactions on the Blockchain. The Grayscale Bitcoin Trust invests principally in bitcoins. The Paradigm Portfolio held 14.30% of its net assets in the Grayscale Bitcoin Trust as of March 31, 2024. The Paradigm Portfolio may also invest in other pooled investment vehicles that provide

exposure to the spot price of crypto assets. For example, the Paradigm Portfolio may invest in the Grayscale Ethereum Classic Trust. The amount of the Paradigm Portfolio’s investment in crypto assets may be limited by law or by tax considerations.

The Paradigm Portfolio contributed a portion of its holdings in the Grayscale Bitcoin Trust to a wholly-owned and controlled subsidiary organized under the laws of the Cayman Islands (the “Subsidiary” or the “Cayman Subsidiary”). Additional information regarding the tax treatment of the Fund is provided in the “Taxes” section of the SAI.

In the future, the Paradigm Portfolio may seek to gain additional exposure to the Grayscale Bitcoin Trust that may not produce qualifying income for the Paradigm Fund under the Internal Revenue Code of 1986, as amended (the “Internal Revenue Code”) if held directly. The Paradigm Portfolio will not make any additional investments in the Grayscale Bitcoin Trust if as a result of such investment, its aggregate investment in the Grayscale Bitcoin Trust, either directly or through the Subsidiary, would be more than 15% of its assets at the time of the investment. However, the Portfolio’s investment in the Grayscale Bitcoin Trust may, at times, exceed 15% of its net assets, due to appreciation.

The Subsidiary invests primarily in the Grayscale Bitcoin Trust. The Paradigm Portfolio will invest in its Subsidiary in a manner that is consistent with the limitations of the federal tax laws, rules and regulations that apply to the Paradigm Fund as a “regulated investment company” (“RIC”) under Subchapter M of Subtitle A, Chapter 1, of the Internal Revenue Code (“Subchapter M”). However, the Paradigm Portfolio and the Subsidiary comply with the same fundamental investment restrictions on an aggregate basis, to the extent those restrictions are applicable to the investment activities of the Subsidiary. The Subsidiary also complies with Section 17 of the 1940 Act relating to affiliated transactions and custody, and the Investment Adviser complies with Section 15 of the 1940 Act, relating to investment advisory contracts with respect to the Subsidiary. Unlike the Paradigm Fund, the Subsidiary does not, and will not, seek to qualify as a RIC. The Paradigm Portfolio is the sole shareholder of the Subsidiary and does not expect shares of the Subsidiary to be offered or sold to other investors. The Subsidiary includes entities that engage in investment activities in securities or other assets that are primarily controlled by the Paradigm Portfolio. The Paradigm Portfolio does not intend to create or acquire primary control of any entity which primarily engages in investment activities in securities or other assets other than entities wholly-owned by the Paradigm Portfolio.

The Paradigm Portfolio may maintain during a temporary period, which could be for a short period or a longer period lasting several years or more, of abnormal conditions, a significant portion of its total assets in cash and securities, generally considered to be cash and cash equivalents, including, but not limited to: high quality, U.S. short-term debt securities and money market instruments. The Investment Adviser will invest in such short-term cash positions to the extent that the Investment Adviser is unable to find sufficient investments meeting its criteria and when the Investment Adviser believes the purchase of additional equity securities would not further the investment objective of the Paradigm Portfolio during such periods of time. Additionally, to respond to adverse market, economic, political or other conditions, which may persist for short or long periods of time, the Paradigm Portfolio may invest up to 100% of its assets in the types of high quality, U.S. short-term debt securities and money market instruments described above.

If the market advances during periods when the Paradigm Portfolio is holding a large cash position, the Portfolio may not participate as much as it would have if it had been more fully invested in securities. In the aforementioned temporary defensive periods, the Investment Adviser believes that an additional amount of liquidity in the Paradigm Portfolio is desirable both to meet operating requirements and to take advantage of new investment opportunities. When the Paradigm Portfolio holds a significant portion of assets in cash and cash equivalents, it may not meet its investment objective.

The Paradigm Portfolio held 57.62% of its net assets in the Texas Pacific Land Corporation (the “Land Corporation”) as of March 31, 2024. The Land Corporation is a corporation organized under the laws of the state of New York. One of the largest land owners in Texas, the Land Corporation derives most of its income from oil and gas royalty revenue, land easements and water royalties and sales. The Land Corporation has historically operated with minimal operating expenses, little to no debt and utilized cash flow to return capital to unitholders through share repurchases and dividends. While the Land Corporation has held the majority of its assets since its formation in 1888, the development of energy resources subject to its royalty interests and related land use have experienced rapid growth in recent years due to advances in energy exploration and extraction technologies.

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Under normal circumstances, the Paradigm Portfolio invests at least 65% of its net assets in common stocks, exchange-traded funds (“ETFs”), convertible securities, warrants, and other equity securities having the characteristics of common stocks (such as American Depositary Receipts (“ADRs”), Global Depositary Receipts (“GDRs”) and International Depositary Receipts (“IDRs”)) of U.S. and foreign companies that the Investment Adviser believes are undervalued, that have, or are expected to soon have, high returns on equity and that are well positioned to reduce their costs, extend the reach of their distribution channels and experience significant growth in their assets or revenues. The Paradigm Portfolio will carry out its investment strategy by regarding investments as representing fractional ownership in the underlying companies’ assets. This will allow the Paradigm Portfolio, and therefore the Paradigm Fund, to attempt to achieve its investment objective by acting as a classic value investor seeking high returns on equity, an intrinsic characteristic of the investment, not a reappraisal of a company’s stock value by the market, an external factor. The Paradigm Portfolio may also purchase and write options for hedging purposes and/or direct investment.The Paradigm Portfolio may invest up to 20% of its total assets in convertible and non-convertible debt securities rated below investment grade, also known as junk bonds, or unrated securities that the Investment Adviser has determined to be of comparable quality. The Paradigm Portfolio may invest up to 100% of its total assets in companies located in emerging markets.

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Principal Investment Risks

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Performance

Performance Information Illustrates Variability of Returns [Text]

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The bar chart and table shown below illustrate the variability of the Paradigm Fund’s returns. The bar chart indicates the risks of investing in the Paradigm Fund by showing the changes in the Paradigm Fund’s performance from year to year (on a calendar year basis). The table shows how the Paradigm Fund’s average annual returns, before and after taxes, compare with those of the S&P 500® Index and the MSCI ACWI (All Country World Index) Index (“MSCI ACWI Index”), which represent broad measures of market performance. The past performance of the Paradigm Fund, before and after taxes, is not necessarily an indication of how the Paradigm Fund or the Paradigm Portfolio will perform in the future. Performance reflects fee waivers in effect. If fee waivers were not in effect, the Paradigm Fund’s performance would be reduced. Updated performance information is available on the Fund’s website at http://www.kineticsfunds.com or by calling the Fund toll-free at (800) 930-3828.

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The bar chart and table shown below illustrate the variability of the Paradigm Fund’s returns.

rr_PerformanceAvailabilityPhone

(800) 930-3828

rr_PerformanceAvailabilityWebSiteAddress

http://www.kineticsfunds.com

rr_PerformancePastDoesNotIndicateFuture

The past performance of the Paradigm Fund, before and after taxes, is not necessarily an indication of how the Paradigm Fund or the Paradigm Portfolio will perform in the future.

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The Paradigm Fund – No Load ClassCalendar Year Returns as of 12/31

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Best Quarter:	Q1 2021	54.40	%
Worst Quarter:	Q1 2020	-32.22	%

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Best Quarter:

rr_BarChartHighestQuarterlyReturnDate

Mar. 31, 2021

rr_BarChartHighestQuarterlyReturn

54.40%

rr_LowestQuarterlyReturnLabel

Worst Quarter:

rr_BarChartLowestQuarterlyReturnDate

Mar. 31, 2020

rr_BarChartLowestQuarterlyReturn

(32.22%)

rr_PerformanceTableHeading

Average Annual Total Returns as of 12/31/2023

rr_PerformanceTableUsesHighestFederalRate

rr_PerformanceTableNotRelevantToTaxDeferred

If you own Fund shares in a tax-deferred account, such as a 401(k) plan or an individual retirement account (“IRA”), the information on after-tax returns is not relevant to your investment.

rr_PerformanceTableExplanationAfterTaxHigher

In some cases, the Return After Taxes on Distributions and Sale of Fund Shares may exceed the Return After Taxes on Distributions or Return Before Taxes due to an assumed benefit from any losses on a sale of Fund Shares at the end of the measurement period.

No Load Class Prospectus | Kinetics Paradigm Fund | Risk Lose Money [Member]

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The Paradigm Fund’s after-tax returns as shown in the following table are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes.Your actual after-tax returns depend on your tax situation and may differ from those shown. If you own Fund shares in a tax-deferred account, such as a 401(k) plan or an individual retirement account (“IRA”), the information on after-tax returns is not relevant to your investment.

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No Load Class Prospectus | Kinetics Paradigm Fund | Crypto Asset Exposure Risk Member

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Investing in common stocks has inherent risks that could cause you to lose money.

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No Load Class Prospectus | Kinetics Paradigm Fund | Crypto Asset Industry Risk Member

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In addition to the general risks of investing in other investment vehicles, the value of the Paradigm Portfolio’s indirect investments in crypto assets are subject to fluctuations in the value of the crypto asset, which can be highly volatile. The value of crypto assets is determined by the supply and demand for crypto assets in the global market for the trading of crypto assets, which consists primarily of transactions on crypto asset trading platforms. The value of crypto assets has been, and may continue to be, substantially dependent on speculation, such that trading and investing in crypto assets generally may not be based on fundamental analysis. The Paradigm Portfolio’s exposure to crypto assets can result in substantial losses to the Paradigm Fund.

Crypto assets trade on crypto asset trading platforms, which are largely unregulated and may therefore be more exposed to fraud and failure than established, regulated exchanges for securities, derivatives and other currencies. These crypto asset trading platforms can cease operating temporarily or even permanently, resulting in the potential loss of users’ crypto assets or other market disruptions. Crypto asset trading platforms may be more exposed to the risk of market manipulation than exchanges for more traditional assets. Individuals or organizations holding a large amount of crypto assets in which the Paradigm Portfolio may invest indirectly (also known as “whales”) may have the ability to manipulate the prices of those crypto assets. Crypto asset trading platforms on which crypto assets are traded are or may become subject to enforcement actions by regulatory authorities. Crypto asset trading platforms that are regulated typically must comply with minimum net worth, cybersecurity, and anti-money laundering requirements, but are not typically required to protect customers or their markets to the same extent that regulated securities exchanges or futures exchanges are required to do so. Furthermore, crypto asset trading platforms may be operating out of compliance with regulations, and many crypto asset trading platforms lack certain safeguards established by more traditional exchanges to enhance the stability of trading on the exchange, such as measures designed to prevent sudden drops in value of items traded on the exchange (i.e., “flash crashes”). As a result, the prices of crypto assets on crypto asset trading platforms may be subject to larger and more frequent sudden declines than assets traded on more traditional exchanges.

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No Load Class Prospectus | Kinetics Paradigm Fund | Crypto Asset Regulatory Risk Member

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experienced extreme volatility and other entities in the crypto asset industry have been, and may continue to be, negatively affected, further undermining confidence in the crypto asset industry. These events are continuing to develop and the full facts are continuing to emerge. It is not possible to predict at this time all of the risks that they may pose to the Paradigm Portfolio, and therefore the Paradigm Fund, its service providers or to the crypto asset industry as a whole.

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No Load Class Prospectus | Kinetics Paradigm Fund | Risk Nondiversified Status [Member]

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ª Crypto Asset Regulatory Risk: Crypto asset markets in the U.S. exist in a state of regulatory uncertainty. Regulatory changes or actions by Congress as well as U.S. federal or state agencies may adversely affect the value of the Paradigm Portfolio’s indirect investments in crypto assets. As digital assets have grown in both popularity and market size, a number of state and federal agencies have issued consumer advisories regarding the risks posed by digital assets to investors. In addition, the Securities and Exchange Commission, U.S. state securities regulators and several foreign governments have issued warnings and instituted legal proceedings in which they argue that certain digital assets may be classified as securities and that both those digital assets and any related initial coin offerings are subject to securities regulations. Additionally, U.S. state and federal, and foreign regulators and legislatures have taken action against virtual currency businesses or enacted restrictive regimes in response to adverse publicity arising from hacks, consumer harm, or criminal activity stemming from virtual currency activity.

Currently, there is relatively limited use of crypto assets in the retail and commercial marketplace, which contributes to price volatility. A lack of expansion by crypto assets into retail and commercial markets, or a contraction of such use, may result in increased volatility or a reduction in the value of crypto assets, either of which could adversely impact the value of the Paradigm Portfolio’s investment. In addition, to the extent market participants develop a preference for one crypto asset over another, the value of the less preferred crypto assets would likely be adversely affected.

The Paradigm Portfolio’s exposure to crypto assets may change over time and, accordingly, such exposure may not be represented in the Paradigm Portfolio’s portfolio at any given time. Many significant aspects of the tax treatment of investments in crypto assets are uncertain, and a direct or indirect investment in crypto assets may produce non-qualifying income. Crypto assets are a new technological innovation with a limited history; it is a highly speculative asset and future regulatory actions or policies may limit, perhaps to a materially adverse extent, the value of the Paradigm Portfolio’s indirect investment in crypto assets and the ability to exchange a crypto asset or utilize it for payments.

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No Load Class Prospectus | Kinetics Paradigm Fund | Single Stock Concentration Risk Member

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ª Non-Diversification Risks: As a non-diversified investment company, the Paradigm Portfolio can invest a large percentage of its assets in a small number of issuers. As a result, a change in the value

of any one investment may affect the overall value of the Paradigm Portfolio’s shares, and therefore the Paradigm Fund’s shares, more than shares of a diversified mutual fund that holds more investments.

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No Load Class Prospectus | Kinetics Paradigm Fund | Liquidity Risks Member

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ª Single Stock Concentration Risk: The Paradigm Portfolio may hold a large concentration of its net assets in a single security or issuer. Holding a large concentration in a single security or issuer may expose the portfolio to the market volatility of that specific security or issuer if the security or issuer performs worse than the market as a whole, which could adversely affect the Fund’s performance.

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No Load Class Prospectus | Kinetics Paradigm Fund | Below Investment Grade Debt Securities Risk Member

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No Load Class Prospectus | Kinetics Paradigm Fund | Sector Concentration Risk Member

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No Load Class Prospectus | Kinetics Paradigm Fund | Convertible Securities Risks Member

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ª Sector Concentration Risk: Although the Paradigm Portfolio will not concentrate its investments in any industries, the Paradigm Portfolio may, at certain times, have concentrations in one or more sectors which may cause the Portfolio to be more sensitive to economic changes or events occurring in those sectors, and the Portfolio’s investments may be more volatile. As of December 31, 2023, the Portfolio had 61.4% invested in the Mining, Quarrying, and Oil and Gas Extraction sector.

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No Load Class Prospectus | Kinetics Paradigm Fund | Emerging Markets Risks Member

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ª Convertible Securities Risks: Convertible securities are subject to the risks affecting both equity and fixed income securities, including market, credit, liquidity and interest rate risk.

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No Load Class Prospectus | Kinetics Paradigm Fund | Exchange-Traded Funds (ETFs) Risks Member

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ª Emerging Markets Risks: The risks of foreign investments are usually much greater for the emerging markets. Investments in emerging markets may be considered speculative. The information available about an emerging market issuer may be less reliable than for comparable issuers in more developed capital markets. In addition, investments in certain emerging markets are subject to an elevated risk of loss resulting from market manipulation and the imposition of exchange controls (including repatriation restrictions). The legal rights and remedies available for investors in emerging markets may be more limited than the rights and remedies available in the U.S., and the ability of U.S. authorities (e.g., SEC and the U.S. Department of Justice) to bring actions against bad actors in emerging markets may be limited.

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No Load Class Prospectus | Kinetics Paradigm Fund | Foreign Securities Risks Member

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ª Exchange-Traded Funds (ETFs) Risks: ETFs are registered investment companies whose shares are listed and traded on U.S. stock exchanges or otherwise traded in the over-the-counter market. In general, passively-managed ETFs seek to track a specified securities index or a basket of securities that an “index provider,” such as S&P Global, selects as representative of a market, market segment or industry sector. A passively-managed ETF is designed so that its performance will correspond closely with that of the index it tracks. A leveraged ETF will engage in transactions and purchase instruments that give rise to forms of leverage, including, among others, the use of reverse repurchase agreements and other borrowings, the investment of collateral from loans of portfolio securities, the use of when issued, delayed-delivery or forward commitment transactions or short sales. To the extent a fund invests in ETFs that achieve leveraged exposure to their underlying indexes through the use of derivative instruments, the fund will indirectly be subject to leveraging risk. As a shareholder in an ETF, the Paradigm Portfolio will bear its pro rata portion of an ETF’s expenses, including advisory fees, in addition to its own expenses. The existence of extreme market volatility or potential lack of an active trading market for an ETF’s shares could result in such shares trading at a significant premium or discount to their NAV.

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No Load Class Prospectus | Kinetics Paradigm Fund | Interest Rate Risk Member

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ª Foreign Securities Risks: The Paradigm Portfolio may invest in foreign securities directly or through ADRs, GDRs and IDRs. Foreign securities can carry higher returns but involve more risks than those associated with U.S. investments. Additional risks associated with investment in foreign securities include currency fluctuations, political and economic instability, less publicly available information, differences in financial reporting standards and less stringent regulation of securities markets. Foreign securities in which the Portfolio invests may be traded in markets that close before the time that the Portfolio calculates its NAV. Furthermore, certain foreign securities in which the Portfolio invests may be listed on foreign exchanges that trade on weekends or other days when the Portfolio does not calculate its NAV. As a result, the value of the Portfolio’s holdings may change on days when shareholders are not able to purchase or redeem the Paradigm Fund’s shares.

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No Load Class Prospectus | Kinetics Paradigm Fund | Leveraging Risks Member

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ª Interest Rate Risk: The risk that when interest rates increase, fixed-income securities held by the Paradigm Portfolio will decline in value. Long-term fixed-income securities will normally have more price volatility because of this risk than short-term fixed-income securities. A low or negative interest rate environment could cause the Paradigm Portfolio's earnings to fall below the Portfolio's expense ratio, resulting in a decline in the Portfolio's share price. A general rise in interest rates may cause investors to move out of fixed income securities on a large scale, which could adversely affect the price and liquidity of fixed income securities. The risks associated with changing interest rates may have unpredictable effects on the markets and the Paradigm Portfolio's investments.

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No Load Class Prospectus | Kinetics Paradigm Fund | Management Risks Member

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ª Leveraging Risks: Investments in derivative instruments may give rise to a form of leverage. The Investment Adviser may engage in speculative transactions, which involve substantial risk and leverage. The use of leverage by the Investment Adviser may increase the volatility of the Paradigm Portfolio. These leveraged instruments may result in losses to the Paradigm Portfolio or may adversely affect the Paradigm Portfolio’s NAV or total return, because instruments that contain leverage are more sensitive to changes in interest rates. The Paradigm Portfolio may also have to sell assets at inopportune times to satisfy its obligations in connection with such transactions.

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No Load Class Prospectus | Kinetics Paradigm Fund | Petroleum And Gas Sector Risk Member

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ª Management Risks: There is no guarantee that the Paradigm Fund will meet its investment objective. The Investment Adviser does not guarantee the performance of the Paradigm Fund, nor can it assure you that the market value of your investment will not decline.

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No Load Class Prospectus | Kinetics Paradigm Fund | Small And Medium-Size Company Risks Member

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No Load Class Prospectus | Kinetics Paradigm Fund | Stock Market Risks Member

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ª Small and Medium-Size Company Risks: The Paradigm Portfolio may invest in the equity securities of small and medium-size companies. Small and medium-size companies often have narrower markets and more limited managerial and financial resources than do larger, more established companies. As a result, their performance can be more volatile and they face a greater risk of business failure, which could increase the volatility of the Paradigm Portfolio’s assets.

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No Load Class Prospectus | Kinetics Paradigm Fund | Stock Selection Risks Member

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ª Stock Market Risks: Stock mutual funds are subject to stock market risks and significant fluctuations in value. If the stock market declines in value, the Paradigm Portfolio, and therefore the Paradigm Fund, is likely to decline in value and you could lose money on your investment. Natural disasters, public health emergencies (including epidemics and pandemics), geopolitical events, terrorism and other global unforeseeable events may lead to instability in world economies and markets, market volatility and may have adverse long-term effects.

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No Load Class Prospectus | Kinetics Paradigm Fund | Subsidiary Risks Member

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ª Stock Selection Risks: The portfolio securities selected by the Investment Adviser may decline in value or not increase in value when the stock market in general is rising and may fail to meet the Paradigm Portfolio’s, and therefore the Paradigm Fund’s, investment objective.

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No Load Class Prospectus | Kinetics Paradigm Fund | Tax Risks Member

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ª Subsidiary Risks: By investing in the Subsidiary, the Paradigm Portfolio is indirectly exposed to the risks associated with the Subsidiary’s investments. Those investments held by the Subsidiary are generally similar to the investments that are permitted to be held by the Paradigm Portfolio and are subject to the same risks that would apply to similar investments if held directly by the Paradigm Portfolio. The Subsidiary is not registered under the 1940 Act and, unless otherwise noted in this Prospectus, is not subject to all the investor protections of the 1940 Act. In addition, changes in the laws of the United States and/or the Cayman Islands could result in the inability of the Paradigm Portfolio and/or its Subsidiary to continue to operate and could adversely affect the Paradigm Fund’s performance.

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No Load Class Prospectus | Kinetics Paradigm Fund | Valuation Risk Member

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ª Tax Risks: In order to qualify as a RIC, the Paradigm Fund must meet certain requirements regarding the source of its income, the diversification of its assets and the distribution of its income. Under the test regarding the source of a RIC’s income, at least 90% of the gross income of the RIC each year must be qualifying income, which consists of dividends, interest, gains on investments in securities and certain other categories of investment income. It appears to be the position of the Internal Revenue Service (the “IRS”) that gain realized on bitcoin investments such as investments in the Grayscale Bitcoin Trust will not be qualifying income. The Paradigm Portfolio’s investment in the Subsidiary is expected to provide the Paradigm Fund with exposure to such bitcoin investments within the limitations of the Internal Revenue Code for qualification as a RIC because, under applicable tax rules, the earnings of the Subsidiary will be qualifying income for the RIC when distributed by the Subsidiary even though the income would not be qualifying income if earned directly by the RIC or directly by an entity classified as a partnership for federal income tax purposes, such as the Paradigm Portfolio, in which the RIC invests. There is a risk, however, that the IRS might assert that the income derived from the Paradigm Portfolio’s investment in the Subsidiary will not be considered qualifying income. If the Paradigm Fund were to fail to qualify as a RIC and became subject to federal income tax, shareholders of the Paradigm Fund would be subject to diminished returns. Additionally, the Paradigm Fund invests, directly and indirectly, in entities that take the position that they are not subject to entity-level tax. If any such entity is reclassified as a corporation for U.S. federal income tax purposes, shareholders of the Paradigm Fund would be subject to diminished returns. Changes in the laws of the United States and/or the Cayman Islands could result in the inability of the Paradigm Portfolio and/or its Subsidiary to operate as described in this Prospectus and could adversely affect the Paradigm Fund. For example, the Cayman Islands does not currently impose any income, corporate or capital gains tax or withholding tax on the Cayman Subsidiary. If Cayman Islands law changes such that the Cayman Subsidiary must pay Cayman Islands taxes, Paradigm Fund shareholders would likely suffer decreased investment returns.

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No Load Class Prospectus | Kinetics Paradigm Fund | Volatility Risk Member

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methodology. Valuation may be more difficult in times of market turmoil since many investors and market makers may be reluctant to purchase complex instruments or quote prices for them. Fair valuation of the Portfolio’s investments involves subjective judgment. The Portfolio’s ability to value its investments may be impacted by technological issues and/or errors by pricing services or other third-party service providers. Shares of Grayscale Bitcoin Trust are intended to reflect the price of bitcoin assets, less fees and expenses, and shares of the Grayscale Bitcoin Trust have historically traded, and may continue to trade, at a significant discount or premium to net asset value. As such, the price of Grayscale Bitcoin Trust may go down even if the price of the underlying asset, bitcoin, remains unchanged. Additionally, shares that trade at a premium mean that an investor who purchases $1 of a portfolio will actually own less than $1 in assets.

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No Load Class Prospectus | Kinetics Paradigm Fund | S&P 500® Index (reflects no deductions for fees, expenses or taxes)

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Index No Deduction for Fees, Expenses, Taxes [Text]

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(reflects no deductions for fees, expenses or taxes)

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S&P 500® Index (reflects no deductions for fees, expenses or taxes)

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26.29%

rr_AverageAnnualReturnYear05

15.69%

rr_AverageAnnualReturnYear10

12.03%

rr_AverageAnnualReturnSinceInception

7.03%

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No Load Class Prospectus | Kinetics Paradigm Fund | MSCI ACWI Index (reflects no deductions for fees, expenses or taxes)

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Dec. 31, 1999

Index No Deduction for Fees, Expenses, Taxes [Text]

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(reflects no deductions for fees, expenses or taxes)

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MSCI ACWI Index (reflects no deductions for fees, expenses or taxes)

rr_AverageAnnualReturnYear01

22.20%

rr_AverageAnnualReturnYear05

11.72%

rr_AverageAnnualReturnYear10

7.93%

rr_AverageAnnualReturnSinceInception

5.14%

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No Load Class Prospectus | Kinetics Paradigm Fund | No Load Class

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Dec. 31, 1999

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Redemption Fee (as a percentage of Amount Redeemed)

dei_TradingSymbol

WWNPX

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(2.00%)

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rr_ManagementFeesOverAssets

1.25%

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rr_DistributionAndService12b1FeesOverAssets

none

rr_Component1OtherExpensesOverAssets

0.25%

rr_Component2OtherExpensesOverAssets

0.18%

rr_OtherExpensesOverAssets

0.43%

rr_ExpensesOverAssets

1.68%

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(0.04%)

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rr_NetExpensesOverAssets

1.64%

rr_ExpenseExampleYear01

$ 167

rr_ExpenseExampleYear03

526

rr_ExpenseExampleYear05

909

rr_ExpenseExampleYear10

$ 1,984

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(0.79%)

rr_AnnualReturn2015

(8.33%)

rr_AnnualReturn2016

20.45%

rr_AnnualReturn2017

28.41%

rr_AnnualReturn2018

(5.55%)

rr_AnnualReturn2019

30.48%

rr_AnnualReturn2020

3.32%

rr_AnnualReturn2021

38.15%

rr_AnnualReturn2022

29.18%

rr_AnnualReturn2023

(16.89%)

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Return Before Taxes

rr_AverageAnnualReturnYear01

(16.89%)

rr_AverageAnnualReturnYear05

14.86%

rr_AverageAnnualReturnYear10

10.26%

rr_AverageAnnualReturnSinceInception

10.10%

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No Load Class Prospectus | Kinetics Paradigm Fund | No Load Class | After Taxes on Distributions

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Dec. 31, 1999

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Return After Taxes on Distributions

rr_AverageAnnualReturnYear01

(17.94%)

rr_AverageAnnualReturnYear05

14.21%

rr_AverageAnnualReturnYear10

9.70%

No Load Class Prospectus | Kinetics Paradigm Fund | No Load Class | After Taxes on Distributions and Sales

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9.79%

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Return After Taxes on Distributions and Sale of Fund Shares(2)

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rr_AverageAnnualReturnYear01

(9.24%)

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rr_AverageAnnualReturnYear05

11.96%

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rr_AverageAnnualReturnYear10

8.38%

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No Load Class Prospectus | Kinetics Small Cap Opportunities Fund

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8.89%

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THE SMALL CAP OPPORTUNITIES FUND

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Investment Objective

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The investment objective of the Small Cap Opportunities Fund (the “Small Cap Fund”) is long-term growth of capital. The Small Cap Fund is the sole “feeder fund” to The Small Cap Opportunities Portfolio (the “Small Cap Portfolio”), a series of Kinetics Portfolios Trust.

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Fees and Expenses of the Fund

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This table describes the fees and expenses that you may pay if you buy, hold, and sell shares of the Small Cap Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the table and example below.

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SHAREHOLDER FEES (fees paid directly from your investment)

Fee Waiver or Reimbursement over Assets, Date of Termination

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ANNUAL FUND OPERATING EXPENSES (expenses that you pay each year as a percentage of the value of your investment)

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April 30, 2025

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Portfolio Turnover.

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The Small Cap Portfolio pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the Example, affect the Small Cap Portfolio’s, and therefore the Small Cap Fund’s, performance. During the most recent fiscal year, the Small Cap Portfolio’s portfolio turnover rate was 2% of the average value of its portfolio.

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2.00%

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This table and the example below reflect the aggregate expenses of the Small Cap Fund and the Small Cap Opportunities Portfolio (the “Small Cap Portfolio”). The management fees paid by the Small Cap Fund reflect the proportionate share of fees allocated to the Small Cap Fund from the Small Cap Portfolio. The fees and expenses of the Small Cap Portfolio included those incurred by any subsidiary wholly-owned and controlled by the Small Cap Portfolio.

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Example.

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This Example is intended to help you compare the cost of investing in the Small Cap Fund with the cost of investing in other mutual funds. This Example assumes that you invest $10,000 in the Small Cap Fund for the time periods indicated and then redeem all of your shares at the end of these periods. The Example also assumes that your investment has a 5% return each year and that the Small Cap Fund’s operating expenses remain the same (taking into account the expense limitation only in the first year).

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Although your actual costs may be higher or lower, based on these assumptions your cost for the Small Cap Fund would be:

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Principal Investment Strategy

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The Small Cap Fund is a non-diversified fund that invests all of its investable assets in the Small Cap Portfolio, a series of Kinetics Portfolios Trust. Under normal circumstances, the Small Cap Portfolio invests at least 80% of its net assets plus any borrowings for investment purposes in common stocks, convertible securities, warrants and other equity securities having the characteristics of common stocks (such as American Depositary Receipts (“ADRs”), Global Depositary Receipts (“GDRs”) and International Depositary Receipts (“IDRs”)) of U.S. and foreign small capitalization companies that provide attractive valuation opportunities. The Small Cap Portfolio’s Investment Adviser considers small cap companies to be those with market capitalizations at or below the highest market capitalization of a component security within the S&P 600® SmallCap Index. The highest market capitalization of a company within the S&P 600® SmallCap Index was approximately $7.3 billion as of March 31, 2024. The Small Cap Portfolio may also invest in exchange-traded funds (“ETFs”) and purchase and write options for hedging purposes and/or direct investment.

The Small Cap Portfolio may invest up to 20% of its total assets in convertible and non-convertible debt securities rated below investment grade, also known as junk bonds, or unrated securities that the Investment Adviser has determined to be of comparable quality.

The Small Cap Portfolio focuses on undervalued and special situation small capitalization equities that the Investment Adviser believes have the potential for rewarding long-term investment results. Small Cap Portfolio securities will generally be selected from companies that are engaged in a number of industries if, in the Investment Adviser’s opinion, they are selling below their perceived intrinsic value, have limited or no institutional ownership, have had short-term earnings shortfalls, have had a recent initial public offering (“IPO”) but have not attracted significant analyst coverage, are selling at or below book or replacement value, or have modest price to earnings ratios. The Investment Adviser considers a company’s fundamentals by reviewing its balance sheets, corporate revenues, earnings and dividends. The Investment Adviser also looks at the amount of capital a company spends on research and development. Additionally, the Small Cap Portfolio may participate in securities lending arrangements up to 33-1/3% of the securities in its portfolio with brokers, dealers, and financial institutions (but not individuals) in order to increase the return on its portfolio.

The Small Cap Portfolio may invest indirectly in bitcoin through a Delaware statutory trust, Grayscale Bitcoin Trust ETF (“Grayscale Bitcoin Trust”) and through other pooled investment vehicles that provide exposure to crypto assets. Certain of these vehicles may not be registered under the Investment Company Act of 1940, as amended (the “1940 Act”) and do not receive the protections of the 1940 Act. The Small Cap Portfolio will not invest directly in Bitcoin or other crypto assets. Grayscale Bitcoin Trust is one of the first spot Bitcoin ETFs in the U.S. It enables investors to gain exposure to bitcoin in the form of a security while avoiding the challenges of buying, storing, and safekeeping bitcoin, directly. Bitcoins are a type of crypto assets that are not issued by a government, bank or central organization. Bitcoins exist on an online, peer-to-peer computer network (the “Bitcoin Network”) that hosts a public transaction ledger where bitcoin transfers are recorded (the “Blockchain”). Bitcoins have no physical existence beyond the record of transactions on the Blockchain. The Grayscale Bitcoin Trust invests principally in bitcoins. The Small Cap Portfolio held 6.72% of its net assets in the Grayscale Bitcoin Trust as of March 31, 2024. The Small Cap Portfolio may also invest in other pooled investment vehicles that provide exposure to the spot price of crypto assets. For example, the Small Cap Portfolio may invest in the Grayscale Ethereum Classic Trust. The amount of the Small Cap Portfolio’s investment in crypto assets may be limited by law or by tax considerations.

The Small Cap Portfolio contributed a portion of its holdings in the Grayscale Bitcoin Trust to a wholly-owned and controlled subsidiary organized under the laws of the Cayman Islands (the “Subsidiary”).

In the future, the Small Cap Portfolio may seek to gain additional exposure to the Grayscale Bitcoin Trust that may not produce qualifying income for the Small Cap Fund under the Internal Revenue Code of 1986, as amended (the “Internal Revenue Code”) if held directly. The Small Cap Portfolio will not make any additional investments in the Grayscale Bitcoin Trust if as a result of such investment, its aggregate investment in the Grayscale Bitcoin Trust, either directly or through a Subsidiary, would be more than 15% of its assets at the time of the investment. However, the Portfolio’s investment in the Grayscale Bitcoin Trust may, at times, exceed 15% of its net assets, due to appreciation.

The Subsidiary invests primarily in the Grayscale Bitcoin Trust. The Small Cap Portfolio will invest in its Subsidiary in a manner consistent with the limitations of the federal tax laws, rules and regulations that apply to the Small Cap Fund as a “regulated investment company” (“RIC”) under Subchapter M of Subtitle A, Chapter 1, of the Internal Revenue Code (“Subchapter M”). However, the Small Cap Portfolio and its Subsidiary comply with the same fundamental investment restrictions on an aggregate basis, to the extent those restrictions are applicable to the investment activities of the Subsidiary. The Subsidiary also complies with Section 17 of the 1940 Act relating to affiliated transactions and custody, and the Investment Adviser complies with Section 15 of the 1940 Act, relating to investment advisory contracts with respect to the Subsidiary. Unlike the Small Cap Fund, the Subsidiary does not, and will not, seek to qualify as a RIC. The Small Cap Portfolio is the sole shareholder of its Subsidiary and does not expect shares of its Subsidiary to be offered or sold to other investors. The Subsidiary includes entities that engage in investment activities in securities or other assets that are primarily controlled by the Small Cap Portfolio. The Small Cap Portfolio does not intend to create or acquire primary control of any entity which primarily engages in investment activities in securities or other assets other than entities wholly-owned by the Small Cap Portfolio.

The Small Cap Portfolio may maintain during a temporary period, which could be for a short period or a longer period lasting several years or more, of abnormal conditions, a significant portion of its total assets in cash and securities, generally considered to be cash and cash equivalents, including, but not limited to: high quality, U.S. short-term debt securities and money market instruments. The Investment Adviser will invest in such short-term cash positions to the extent that the Investment Adviser is unable to find sufficient investments meeting its criteria and when the Investment Adviser believes the purchase of additional equity securities would not further the investment objective of the Small Cap Portfolio during such periods of time. Additionally, to respond to adverse market, economic, political or other conditions, which may persist for short or long periods of time, the Small Cap Portfolio may invest up to 100% of its assets in the types of high quality, U.S. short-term debt securities and money market instruments described above.

If the market advances during periods when the Small Cap Portfolio is holding a large cash position, the Portfolio may not participate as much as it would have if it had been more fully invested in securities. In the aforementioned temporary defensive periods, the Investment Adviser believes that an additional amount of liquidity in the Small Cap Portfolio is desirable both to meet operating requirements and to take advantage of new investment opportunities. When the Small Cap Portfolio holds a significant portion of assets in cash and cash equivalents, it may not meet its investment objective.

The Small Cap Portfolio held 47.40% of its net assets in the Texas Pacific Land Corporation (the “Land Corporation”) as of March 31, 2024. The Land Corporation is a corporation organized under the laws of the state of New York. One of the largest land owners in Texas, the Land Corporation derives most of its income from oil and gas royalty revenue, land easements and water royalties and sales. The Land Corporation has historically operated with minimal operating expenses, little to no debt and utilized cash flow to return capital to unitholders through share repurchases and dividends. While the Land Corporation has held the majority of its assets since its formation in 1888, the development of energy resources subject to its royalty interests and related land use have experienced rapid growth in recent years due to advances in energy exploration and extraction technologies.

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Under normal circumstances, the Small Cap Portfolio invests at least 80% of its net assets plus any borrowings for investment purposes in common stocks, convertible securities, warrants and other equity securities having the characteristics of common stocks (such as American Depositary Receipts (“ADRs”), Global Depositary Receipts (“GDRs”) and International Depositary Receipts (“IDRs”)) of U.S. and foreign small capitalization companies that provide attractive valuation opportunities. The Small Cap Portfolio’s Investment Adviser considers small cap companies to be those with market capitalizations at or below the highest market capitalization of a component security within the S&P 600® SmallCap Index. The highest market capitalization of a company within the S&P 600® SmallCap Index was approximately $7.3 billion as of March 31, 2024. The Small Cap Portfolio may also invest in exchange-traded funds (“ETFs”) and purchase and write options for hedging purposes and/or direct investment. The Small Cap Portfolio may invest up to 20% of its total assets in convertible and non-convertible debt securities rated below investment grade, also known as junk bonds, or unrated securities that the Investment Adviser has determined to be of comparable quality.

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Principal Investment Risks

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Performance

Performance Information Illustrates Variability of Returns [Text]

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The bar chart and table shown below illustrate the variability of the Small Cap Fund’s returns. The bar chart indicates the risks of investing in the Small Cap Fund by showing the changes in the Small Cap Fund’s performance from year to year (on a calendar year basis). The table shows how the Small Cap Fund’s average annual returns, before and after taxes, compare with those of the S&P 600® SmallCap Index and the S&P 500® Index, which represent broad measures of market performance. The past performance of the Small Cap Fund, before and after taxes, is not necessarily an indication of how the Small Cap Fund or the Small Cap Portfolio will perform in the future. Performance reflects fee waivers in effect. If fee waivers were not in place, the Small Cap Fund’s performance would be reduced. Updated performance information is available on the Fund’s website at http://www.kineticsfunds.com or by calling the Fund toll-free at (800) 930-3828.

rr_PerformanceInformationIllustratesVariabilityOfReturns

The bar chart and table shown below illustrate the variability of the Small Cap Fund’s returns.

rr_PerformanceAvailabilityPhone

(800) 930-3828

rr_PerformanceAvailabilityWebSiteAddress

http://www.kineticsfunds.com

rr_PerformancePastDoesNotIndicateFuture

The past performance of the Small Cap Fund, before and after taxes, is not necessarily an indication of how the Small Cap Fund or the Small Cap Portfolio will perform in the future.

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The Small Cap Fund – No Load ClassCalendar Year Returns as of 12/31

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Best Quarter:	Q1 2021	60.47	%
Worst Quarter:	Q1 2020	-34.39	%

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Best Quarter:

rr_BarChartHighestQuarterlyReturnDate

Mar. 31, 2021

rr_BarChartHighestQuarterlyReturn

60.47%

rr_LowestQuarterlyReturnLabel

Worst Quarter:

rr_BarChartLowestQuarterlyReturnDate

Mar. 31, 2020

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(34.39%)

rr_PerformanceTableHeading

Average Annual Total Returns as of 12/31/2023

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rr_PerformanceTableNotRelevantToTaxDeferred

If you own Fund shares in a tax-deferred account, such as a 401(k) plan or an individual retirement account (“IRA”), the information on after-tax returns is not relevant to your investment.

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The Small Cap Fund’s after-tax returns as shown in the following table are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Your actual after-tax returns depend on your tax situation and may differ from those shown. If you own Fund shares in a tax-deferred account, such as a 401(k) plan or an individual retirement account (“IRA”), the information on after-tax returns is not relevant to your investment.

No Load Class Prospectus | Kinetics Small Cap Opportunities Fund | Risk Lose Money [Member]

rr_AverageAnnualReturnInceptionDate

Mar. 20, 2000

rr_ProspectusLineItems

No Load Class Prospectus | Kinetics Small Cap Opportunities Fund | Crypto Asset Exposure Risk Member

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Investing in common stocks has inherent risks that could cause you to lose money.

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No Load Class Prospectus | Kinetics Small Cap Opportunities Fund | Crypto Asset Industry Risk Member

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In addition to the general risks of investing in other investment vehicles, the value of the Small Cap Portfolio’s indirect investments in crypto assets are subject to fluctuations in the value of the crypto asset, which can be highly volatile. The value of crypto assets is determined by the supply and demand for crypto assets in the global market for the trading of crypto assets, which consists primarily of transactions on crypto asset trading platforms. The value of crypto assets has been, and may continue to be, substantially dependent on speculation, such that trading and investing in crypto assets generally may not be based on fundamental analysis. The Small Cap Portfolio’s exposure to crypto assets can result in substantial losses to the Small Cap Fund.

Crypto assets trade on crypto asset trading platforms, which are largely unregulated and may therefore be more exposed to fraud and failure than established, regulated exchanges for securities, derivatives and other currencies. These crypto asset trading platforms can cease operating temporarily or even permanently, resulting in the potential loss of users’ crypto assets or other market disruptions. Crypto asset trading platforms may be more exposed to the risk of market manipulation than exchanges for more traditional assets. Individuals or organizations holding a large amount of crypto assets in which the Small Cap Portfolio may invest indirectly (also known as “whales”) may have the ability to manipulate the prices of those crypto assets. Crypto asset trading platforms on which crypto assets are traded are or may become subject to enforcement actions by regulatory authorities. Crypto asset trading platforms that are regulated typically must comply with minimum net worth, cybersecurity, and anti-money laundering requirements, but are not typically required to protect customers or their markets to the same extent that regulated securities exchanges or futures exchanges are required to do so. Furthermore, crypto asset trading platforms may be operating out of compliance with regulations, and many crypto asset trading platforms lack certain safeguards established by more traditional exchanges to enhance the stability of trading on the exchange, such as measures designed to prevent sudden drops in value of items traded on the exchange (i.e., “flash crashes”). As a result, the prices of crypto assets on crypto asset trading platforms may be subject to larger and more frequent sudden declines than assets traded on more traditional exchanges.

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No Load Class Prospectus | Kinetics Small Cap Opportunities Fund | Crypto Asset Regulatory Risk Member

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Crypto Asset Industry Risk: The crypto asset industry is a newer, speculative, and still-developing industry that faces many risks. The crypto asset industry may still be experiencing a bubble or may experience a bubble again in the future. For example, in the first half of 2022, each of Celsius Network, Voyager Digital Ltd., and Three Arrows Capital declared bankruptcy, resulting in a loss of confidence in participants of the digital asset ecosystem and negative publicity surrounding digital

assets more broadly. In November 2022, FTX Trading Ltd. (“FTX”), one of the largest digital asset platforms by volume at the time, halted customer withdrawals amid rumors of the company’s liquidity issues and likely insolvency, which were subsequently corroborated by its CEO. Shortly thereafter, FTX’s CEO resigned and FTX and many of its affiliates filed for bankruptcy in the United States, while other affiliates have entered insolvency, liquidation, or similar proceedings around the globe, following which the U.S. Department of Justice brought criminal fraud and other charges, and the SEC and CFTC brought civil securities and commodities fraud charges, against certain of FTX’s and its affiliates’ senior executives, including its former CEO. In addition, several other entities in the crypto asset industry filed for bankruptcy following FTX’s bankruptcy filing, such as BlockFi Inc. and Genesis Global Capital, LLC. In response to these events, the prices of crypto assets have experienced extreme volatility and other entities in the crypto asset industry have been, and may continue to be, negatively affected, further undermining confidence in the crypto asset industry. These events are continuing to develop and the full facts are continuing to emerge. It is not possible to predict at this time all of the risks that they may pose to the Small Cap Portfolio, and therefore the Small Cap Fund, its service providers or to the crypto asset industry as a whole.

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No Load Class Prospectus | Kinetics Small Cap Opportunities Fund | Risk Nondiversified Status [Member]

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ª Crypto Asset Regulatory Risk: Crypto asset markets in the U.S. exist in a state of regulatory uncertainty. Regulatory changes or actions by Congress as well as U.S. federal or state agencies may adversely affect the value of the Small Cap Portfolio’s indirect investments in crypto assets. As digital assets have grown in both popularity and market size, a number of state and federal agencies have issued consumer advisories regarding the risks posed by digital assets to investors. In addition, the Securities and Exchange Commission, U.S. state securities regulators and several foreign governments have issued warnings and instituted legal proceedings in which they argue that certain digital assets may be classified as securities and that both those digital assets and any related initial coin offerings are subject to securities regulations. Additionally, U.S. state and federal, and foreign regulators and legislatures have taken action against virtual currency businesses or enacted restrictive regimes in response to adverse publicity arising from hacks, consumer harm, or criminal activity stemming from virtual currency activity.

Currently, there is relatively limited use of crypto assets in the retail and commercial marketplace, which contributes to price volatility. A lack of expansion by crypto assets into retail and commercial markets, or a contraction of such use, may result in increased volatility or a reduction in the value of crypto assets, either of which could adversely impact the value of the Small Cap Portfolio’s investment. In addition, to the extent market participants develop a preference for one crypto asset over another, the value of the less preferred crypto assets would likely be adversely affected.

The Small Cap Portfolio’s exposure to crypto assets may change over time and, accordingly, such exposure may not be represented in the Small Cap Portfolio’s portfolio at any given time. Many significant aspects of the tax treatment of investments in crypto assets are uncertain, and a direct or indirect investment in crypto assets may produce non-qualifying income. Crypto assets are a new technological innovation with a limited history; it is a highly speculative asset and future regulatory actions or policies may limit, perhaps to a materially adverse extent, the value of the Small Cap Portfolio’s indirect investment in crypto assets and the ability to exchange a crypto asset or utilize it for payments.

rr_ProspectusLineItems

No Load Class Prospectus | Kinetics Small Cap Opportunities Fund | Single Stock Concentration Risk Member

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ª Non-Diversification Risks: As a non-diversified investment company, the Small Cap Portfolio can invest a large percentage of its assets in a small number of issuers. As a result, a change in the value of any one investment may affect the overall value of the Small Cap Portfolio’s shares, and therefore the Small Cap Fund’s shares, more than shares of a more diversified mutual fund that holds more investments.

rr_ProspectusLineItems

No Load Class Prospectus | Kinetics Small Cap Opportunities Fund | Liquidity Risks Member

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ª Single Stock Concentration Risk: The Small Cap Portfolio may hold a large concentration of its net assets in a single security or issuer. Holding a large concentration in a single security or issuer may expose the portfolio to the market volatility of that specific security or issuer if the security or issuer performs worse than the market as a whole, which could adversely affect the Fund’s performance.

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No Load Class Prospectus | Kinetics Small Cap Opportunities Fund | Below Investment Grade Debt Securities Risk Member

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No Load Class Prospectus | Kinetics Small Cap Opportunities Fund | Sector Concentration Risk Member

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No Load Class Prospectus | Kinetics Small Cap Opportunities Fund | Convertible Securities Risks Member

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ª Sector Concentration Risk: Although the Small Cap Portfolio will not concentrate its investments in any industries, the Small Cap Portfolio may, at certain times, have concentrations in one or more sectors which may cause the Portfolio to be more sensitive to economic changes or events occurring in those sectors, and the Portfolio's investments may be more volatile. As of December 31, 2023, the Portfolio had 49.3% invested in the Mining, Quarrying and Oil and Gas Extraction sector.

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No Load Class Prospectus | Kinetics Small Cap Opportunities Fund | Exchange-Traded Funds (ETFs) Risks Member

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ª Convertible Securities Risks: Convertible securities are subject to the risks affecting both equity and fixed income securities, including market, credit, liquidity and interest rate risk.

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No Load Class Prospectus | Kinetics Small Cap Opportunities Fund | Foreign Securities Risks Member

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ª Exchange-Traded Funds (ETFs) Risks: ETFs are registered investment companies whose shares are listed and traded on U.S. stock exchanges or otherwise traded in the over-the-counter market. In general, passively-managed ETFs seek to track a specified securities index or a basket of securities that an “index provider,” such as S&P Global, selects as representative of a market, market segment or industry sector. A passively-managed ETF is designed so that its performance will correspond closely with that of the index it tracks. A leveraged ETF will engage in transactions and purchase instruments that give rise to forms of leverage, including, among others, the use of reverse repurchase agreements and other borrowings, the investment of collateral from loans of portfolio securities, the use of when issued, delayed-delivery or forward commitment transactions or short sales. To the extent a fund invests in ETFs that achieve leveraged exposure to their underlying indexes through the use of derivative instruments, the fund will indirectly be subject to leveraging risk. As a shareholder in an ETF, the Small Cap Portfolio will bear its pro rata portion of an ETF’s expenses, including advisory fees, in addition to its own expenses. The existence of extreme market volatility or potential lack of an active trading market for an ETF’s shares could result in such shares trading at a significant premium or discount to their NAV.

rr_ProspectusLineItems

No Load Class Prospectus | Kinetics Small Cap Opportunities Fund | Interest Rate Risk Member

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ª Foreign Securities Risks: The Small Cap Portfolio may invest in foreign securities directly or through ADRs, GDRs and IDRs. Foreign securities can carry higher returns but involve more risks than those associated with U.S. investments. Additional risks associated with investment in foreign securities include currency fluctuations, political and economic instability, less publicly available information, differences in financial reporting standards and less stringent regulation of securities markets. Foreign securities in which the Portfolio invests may be traded in markets that close before the time that the Portfolio calculates its NAV. Furthermore, certain foreign securities in which the Portfolio invests

may be listed on foreign exchanges that trade on weekends or other days when the Portfolio does not calculate its NAV. As a result, the value of the Portfolio’s holdings may change on days when shareholders are not able to purchase or redeem the Small Cap Fund’s shares.

rr_ProspectusLineItems

No Load Class Prospectus | Kinetics Small Cap Opportunities Fund | IPO Risk Member

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ª Interest Rate Risk: The risk that when interest rates increase, fixed-income securities held by the Small Cap Portfolio will decline in value. Long-term fixed-income securities will normally have more price volatility because of this risk than short-term fixed-income securities. A low or negative interest rate environment could cause the Small Cap Portfolio's earnings to fall below the Portfolio's expense ratio, resulting in a decline in the Portfolio's share price. A general rise in interest rates may cause investors to move out of fixed income securities on a large scale, which could adversely affect the price and liquidity of fixed income securities. The risks associated with changing interest rates may have unpredictable effects on the markets and the Small Cap Portfolio's investments.

rr_ProspectusLineItems

No Load Class Prospectus | Kinetics Small Cap Opportunities Fund | Leveraging Risks Member

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ª IPO Risk: IPO share prices can be volatile and fluctuate considerably due to factors such as the absence of a prior public market, unseasoned trading, a limited number of shares available for trading, and limited operating history and/or information about the issuer. The purchase of IPO shares may involve high transaction costs. IPO shares are subject to market risk and liquidity risk.

rr_ProspectusLineItems

No Load Class Prospectus | Kinetics Small Cap Opportunities Fund | Management Risks Member

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ª Leveraging Risks: Investments in derivative instruments may give rise to a form of leverage. The Investment Adviser may engage in speculative transactions, which involve substantial risk and leverage. The use of leverage by the Investment Adviser may increase the volatility of the Small Cap Portfolio. These leveraged instruments may result in losses to the Small Cap Portfolio or may adversely affect the Small Cap Portfolio’s NAV or total return, because instruments that contain leverage are more sensitive to changes in interest rates. The Small Cap Portfolio may also have to sell assets at inopportune times to satisfy its obligations in connection with such transactions.

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No Load Class Prospectus | Kinetics Small Cap Opportunities Fund | Petroleum And Gas Sector Risk Member

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ª Management Risks: There is no guarantee that the Small Cap Fund will meet its investment objective. The Investment Adviser does not guarantee the performance of the Small Cap Fund, nor can it assure you that the market value of your investment will not decline.

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No Load Class Prospectus | Kinetics Small Cap Opportunities Fund | Small-Capitalization Company Risks Member

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No Load Class Prospectus | Kinetics Small Cap Opportunities Fund | Special Situations Risks Member

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ª Small-Capitalization Company Risks: The Small Cap Portfolio primarily invests in the stocks of small-capitalization companies. Small-capitalization companies often have narrower markets and more limited managerial and financial resources than larger, more established companies. As a result,

their performance can be more volatile and they face a greater risk of business failure, which could increase the volatility of the Small Cap Portfolio’s assets.

rr_ProspectusLineItems

No Load Class Prospectus | Kinetics Small Cap Opportunities Fund | Stock Market Risks Member

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ª Special Situations Risks: The Small Cap Portfolio may use aggressive investment techniques, including seeking to benefit from “special situations,” such as mergers, reorganizations, or other unusual events expected to affect a particular issuer. There is a risk that the “special situation” might not occur or involve longer time frames than originally expected, which could have a negative impact on the price of the issuer’s securities and fail to produce gains or produce a loss for the Small Cap Portfolio, and therefore the Small Cap Fund.

rr_ProspectusLineItems

No Load Class Prospectus | Kinetics Small Cap Opportunities Fund | Stock Selection Risks Member

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ª Stock Market Risks: Stock mutual funds are subject to stock market risks and significant fluctuations in value. If the stock market declines in value, the Small Cap Portfolio, and therefore the Small Cap Fund, is likely to decline in value and you could lose money on your investment. Natural disasters, public health emergencies (including epidemics and pandemics), geopolitical events, terrorism and other global unforeseeable events may lead to instability in world economies and markets, market volatility and may have adverse long-term effects.

rr_ProspectusLineItems

No Load Class Prospectus | Kinetics Small Cap Opportunities Fund | Subsidiary Risks Member

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ª Stock Selection Risks: The portfolio securities selected by the Investment Adviser may decline in value or not increase in value when the stock market in general is rising and may fail to meet the Small Cap Portfolio’s, and therefore the Small Cap Fund’s, investment objective.

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No Load Class Prospectus | Kinetics Small Cap Opportunities Fund | Tax Risks Member

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ª Subsidiary Risks: By investing in its Subsidiary, the Small Cap Portfolio is indirectly exposed to the risks associated with the Subsidiary’s investments. Those investments held by the Subsidiary are generally similar to the investments that are permitted to be held by the Small Cap Portfolio and are subject to the same risks that would apply to similar investments if held directly by the Small Cap Portfolio. The Subsidiary is not registered under the 1940 Act and, unless otherwise noted in this Prospectus, is not subject to all the investor protections of the 1940 Act. In addition, changes in the laws of the United States and/or the Cayman Islands could result in the inability of the Small Cap Portfolio and/or its Subsidiary to continue to operate and could adversely affect the Small Cap Fund’s performance.

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No Load Class Prospectus | Kinetics Small Cap Opportunities Fund | Valuation Risk Member

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ª Tax Risks: In order to qualify as a RIC, the Small Cap Fund must meet certain requirements regarding the source of its income, the diversification of its assets and the distribution of its income. Under the test regarding the source of a RIC’s income, at least 90% of the gross income of the RIC each year must be qualifying income, which consists of dividends, interest, gains on investments in securities and certain other categories of investment income. It appears to be the position of the Internal Revenue Service (the “IRS”) that gain realized on bitcoin investments such as investments in the Grayscale Bitcoin Trust will not be qualifying income. The Small Cap Portfolio’s investment in its Subsidiary is expected to provide the Small Cap Fund with exposure to such bitcoin investments within the limitations of the Internal Revenue Code for qualification as a RIC because, under applicable tax rules, the earnings of the Subsidiary will be qualifying income for the RIC when distributed by the Subsidiary even though the income would not be qualifying income if earned directly by the RIC or directly by an entity classified as a partnership for federal income tax purposes, such as the Small Cap Portfolio, in which the RIC invests. There is a risk, however, that the IRS might assert that the income derived from the Small Cap Portfolio’s investment in its Subsidiary will not be considered qualifying income. If the Small Cap Fund were to fail to qualify as a RIC and became subject to federal income tax, shareholders of the Small Cap Fund would be subject to diminished returns. Additionally, the Small Cap Fund invests, directly and indirectly, in entities that take the position that they are not subject to entity-level tax. If any such entity is reclassified as a corporation for U.S. federal income tax purposes, shareholders of the Small Cap Fund would be

subject to diminished returns. Changes in the laws of the United States and/or the Cayman Islands could result in the inability of the Small Cap Portfolio and/or its Subsidiary to operate as described in this Prospectus and could adversely affect the Small Cap Fund. For example, the Cayman Islands does not currently impose any income, corporate or capital gains tax or withholding tax on the Subsidiary. If Cayman Islands law changes such that the Subsidiary must pay Cayman Islands taxes, Small Cap Fund shareholders would likely suffer decreased investment returns.

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No Load Class Prospectus | Kinetics Small Cap Opportunities Fund | Volatility Risk Member

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ª Valuation Risk: The sales price the Portfolio could receive for any particular portfolio investment may differ from the Portfolio’s valuation of the investment, particularly for securities or other investments, such as Bitcoin, that trade in thin or volatile markets or that are valued using a fair value methodology. Valuation may be more difficult in times of market turmoil since many investors and market makers may be reluctant to purchase complex instruments or quote prices for them. Fair valuation of the Portfolio’s investments involves subjective judgment. The Portfolio’s ability to value its investments may be impacted by technological issues and/or errors by pricing services or other third-party service providers. Shares of Grayscale Bitcoin Trust are intended to reflect the price of bitcoin assets, less fees and expenses, and shares of the Grayscale Bitcoin Trust have historically traded, and may continue to trade, at a significant discount or premium to net asset value. As such, the price of Grayscale Bitcoin Trust may go down even if the price of the underlying asset, bitcoin, remains unchanged. Additionally, shares that trade at a premium mean that an investor who purchases $1 of a portfolio will actually own less than $1 in assets.

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No Load Class Prospectus | Kinetics Small Cap Opportunities Fund | S&P 500® Index (reflects no deductions for fees, expenses or taxes)

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Index No Deduction for Fees, Expenses, Taxes [Text]

rr_ProspectusLineItems

rr_IndexNoDeductionForFeesExpensesTaxes

(reflects no deductions for fees, expenses or taxes)

rr_AverageAnnualReturnLabel

S&P 500® Index (reflects no deductions for fees, expenses or taxes)

rr_AverageAnnualReturnYear01

26.29%

rr_AverageAnnualReturnYear05

15.69%

rr_AverageAnnualReturnYear10

12.03%

rr_AverageAnnualReturnSinceInception

7.13%

^[11]

No Load Class Prospectus | Kinetics Small Cap Opportunities Fund | S&P 600® SmallCap Index (reflects no deductions for fees, expenses or taxes)

rr_AverageAnnualReturnInceptionDate

Mar. 20, 2000

Index No Deduction for Fees, Expenses, Taxes [Text]

rr_ProspectusLineItems

rr_IndexNoDeductionForFeesExpensesTaxes

(reflects no deductions for fees, expenses or taxes)

rr_AverageAnnualReturnLabel

S&P 600® SmallCap Index (reflects no deductions for fees, expenses or taxes)

rr_AverageAnnualReturnYear01

16.05%

rr_AverageAnnualReturnYear05

11.03%

rr_AverageAnnualReturnYear10

8.66%

rr_AverageAnnualReturnSinceInception

9.31%

^[11]

No Load Class Prospectus | Kinetics Small Cap Opportunities Fund | No Load Class

rr_AverageAnnualReturnInceptionDate

Mar. 20, 2000

rr_ProspectusLineItems

Redemption Fee (as a percentage of Amount Redeemed)

dei_TradingSymbol

KSCOX

rr_RedemptionFeeOverRedemption

(2.00%)

^[12]

rr_ManagementFeesOverAssets

1.25%

^[12]

rr_DistributionAndService12b1FeesOverAssets

none

rr_Component1OtherExpensesOverAssets

0.25%

rr_Component2OtherExpensesOverAssets

0.22%

rr_OtherExpensesOverAssets

0.47%

rr_ExpensesOverAssets

1.72%

rr_FeeWaiverOrReimbursementOverAssets

(0.08%)

^[13]

rr_NetExpensesOverAssets

1.64%

rr_ExpenseExampleYear01

$ 167

rr_ExpenseExampleYear03

534

rr_ExpenseExampleYear05

926

rr_ExpenseExampleYear10

$ 2,024

rr_AnnualReturn2014

(7.28%)

rr_AnnualReturn2015

(12.26%)

rr_AnnualReturn2016

24.39%

rr_AnnualReturn2017

26.23%

rr_AnnualReturn2018

0.29%

rr_AnnualReturn2019

27.06%

rr_AnnualReturn2020

2.30%

rr_AnnualReturn2021

50.33%

rr_AnnualReturn2022

31.96%

rr_AnnualReturn2023

(14.69%)

rr_PerformanceTableExplanationAfterTaxHigher

rr_AverageAnnualReturnLabel

Return Before Taxes

rr_AverageAnnualReturnYear01

(14.69%)

rr_AverageAnnualReturnYear05

17.08%

rr_AverageAnnualReturnYear10

10.92%

No Load Class Prospectus | Kinetics Small Cap Opportunities Fund | No Load Class | After Taxes on Distributions

rr_AverageAnnualReturnSinceInception

11.28%

^[11]

rr_ProspectusLineItems

rr_AverageAnnualReturnLabel

Return After Taxes on Distributions

rr_AverageAnnualReturnYear01

(15.96%)

rr_AverageAnnualReturnYear05

16.61%

rr_AverageAnnualReturnYear10

10.69%

No Load Class Prospectus | Kinetics Small Cap Opportunities Fund | No Load Class | After Taxes on Distributions and Sales

rr_AverageAnnualReturnSinceInception

11.04%

^[11]

rr_ProspectusLineItems

rr_AverageAnnualReturnLabel

Return After Taxes on Distributions and Sale of Fund Shares(2)

^[14]

rr_AverageAnnualReturnYear01

(7.78%)

^[14]

rr_AverageAnnualReturnYear05

13.83%

^[14]

rr_AverageAnnualReturnYear10

9.07%

^[14]

No Load Class Prospectus | Kinetics Market Opportunities Fund

rr_AverageAnnualReturnSinceInception

10.00%

^[11],[14]

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rr_RiskReturnHeading

THE MARKET OPPORTUNITIES FUND

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Investment Objective

rr_ObjectivePrimaryTextBlock

The investment objective of the Market Opportunities Fund is long-term growth of capital. The Market Opportunities Fund is the sole “feeder fund” to The Market Opportunities Portfolio, a series of Kinetics Portfolios Trust.

rr_ExpenseHeading

Fees and Expenses of the Fund

rr_ExpenseNarrativeTextBlock

This table describes the fees and expenses that you may pay if you buy, hold, and sell shares of the Market Opportunities Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the table and example below.

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SHAREHOLDER FEES(fees paid directly from your investment)

Fee Waiver or Reimbursement over Assets, Date of Termination

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ANNUAL FUND OPERATING EXPENSES(expenses that you pay each year as a percentage of the value of your investment)

rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination

April 30, 2025

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Portfolio Turnover.

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The Market Opportunities Portfolio pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the Example, affect the Market Opportunities Portfolio’s, and therefore the Market Opportunities Fund’s, performance. During the most recent fiscal year, the Market Opportunities Portfolio’s portfolio turnover rate was 5% of the average value of its portfolio.

rr_PortfolioTurnoverRate

5.00%

rr_ExpensesRepresentBothMasterAndFeeder

This table and the example below reflect the aggregate expenses of the Market Opportunities Fund and the Market Opportunities Portfolio. The management fees paid by the Market Opportunities Fund reflect the proportionate share of fees allocated to the Market Opportunities Fund from the Market Opportunities Portfolio. The fees and expenses of the Market Opportunities Portfolio included those incurred by any subsidiary wholly-owned and controlled by the Market Opportunities Portfolio.

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Example.

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This Example is intended to help you compare the cost of investing in the Market Opportunities Fund with the cost of investing in other mutual funds. This Example assumes that you invest $10,000 in the Market Opportunities Fund for the time periods indicated and then redeem all of your shares at the end of these periods. The Example also assumes that your investment has a 5% return each year and that the Market Opportunities Fund’s operating expenses remain the same (taking into account the expense limitation only in the first year).

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Although your actual costs may be higher or lower, based on these assumptions your cost for the Market Opportunities Fund would be:

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Principal Investment Strategy

rr_StrategyNarrativeTextBlock

The Market Opportunities Fund is a non-diversified fund that invests all of its investable assets in the Market Opportunities Portfolio, a series of Kinetics Portfolios Trust. Under normal circumstances, the Market Opportunities Portfolio invests at least 65% of its net assets in common stocks, convertible securities, warrants and other equity securities having the characteristics of common stocks (such as American Depositary Receipts (“ADRs”), Global Depositary Receipts (“GDRs”) and International Depositary Receipts (“IDRs”)) of U.S. and foreign companies involved in capital markets or related to capital markets, as well as companies involved in the gaming industry. Capital market companies include companies that are engaged in or derive a substantial portion of their revenue from activities with a publicly traded securities exchange, such as equity exchanges and commodity exchanges, including but not limited to clearing firms and brokerage houses. The Market Opportunities Portfolio may also invest in exchange-traded funds (“ETFs”) and purchase and write options for hedging purposes and/or direct investment.

The Market Opportunities Portfolio may invest up to 20% of its total assets in convertible and non-convertible debt securities rated below investment grade, also known as junk bonds, or unrated securities that the Investment Adviser has determined to be of comparable quality.

The Market Opportunities Portfolio securities will be selected by the Investment Adviser from companies that are engaged in public exchanges, derivative exchanges, and capital markets; companies that experience operational scale from increased volume such as investment banks, credit card processing companies, electronic payment companies and companies in the gaming industry; and from companies that act as facilitators such as publicly traded expressways, airports, roads and railways. Companies that experience operational scale from increased volume are similar to capital markets companies because they have greater fixed costs than variable costs, operating margins that rise once fixed costs are covered, and an ability to generate higher operating margins once fixed costs are covered (referred to as operating leverage). High operating leverage describes a company’s ability to experience rising profit margins as revenues increase. These companies may be large, medium or small in size if, in the Investment Adviser’s opinion, these companies meet the Market Opportunities Portfolio’s investment criteria. The Investment Adviser seeks to invest in companies with high operating leverage that can expand capacity with negligible or limited associated costs. Generally, high returns on equity, long product life cycles, high barriers to entry and certain degrees of financial gearing are necessary for this. Financial gearing occurs with the use of loans and debt in companies where it is necessary to build

capacity and infrastructure before operations can begin. Additionally, the Market Opportunities Portfolio may participate in securities lending arrangements up to 33-1/3% of the securities in its portfolio with brokers, dealers, and financial institutions (but not individuals) in order to increase the return on its portfolio.

The Market Opportunities Portfolio may invest indirectly in bitcoin through a Delaware statutory trust, Grayscale Bitcoin Trust ETF (“Grayscale Bitcoin Trust”) and through other pooled investment vehicles that provide exposure to crypto assets. Certain of these vehicles may not be registered under the Investment Company Act of 1940, as amended (the “1940 Act”) and do not receive the protections of the 1940 Act. The Market Opportunities Portfolio will not invest directly in Bitcoin or other crypto assets. Grayscale Bitcoin Trust is one of the first spot Bitcoin ETFs in the U.S. It enables investors to gain exposure to bitcoin in the form of a security while avoiding the challenges of buying, storing, and safekeeping bitcoin, directly. Bitcoins are a type of crypto assets that are not issued by a government, bank or central organization. Bitcoins exist on an online, peer-to-peer computer network (the “Bitcoin Network”) that hosts a public transaction ledger where bitcoin transfers are recorded (the “Blockchain”). Bitcoins have no physical existence beyond the record of transactions on the Blockchain. The Grayscale Bitcoin Trust invests principally in bitcoins. The Market Opportunities Portfolio held 26.36% of its net assets in the Grayscale Bitcoin Trust as of March 31, 2024. The Market Opportunities Portfolio may also invest in other pooled investment vehicles that provide exposure to the spot price of crypto assets. For example, the Market Opportunities Portfolio may invest in the Grayscale Ethereum Classic Trust. The amount of the Market Opportunities Portfolio’s investment in crypto assets may be limited by law or by tax considerations.

The Market Opportunities Portfolio contributed a portion of its holdings in the Grayscale Bitcoin Trust to a wholly-owned and controlled subsidiary organized under the laws of the Cayman Islands (the “Cayman Subsidiary”).

The Market Opportunities Portfolio is also the sole shareholder of a wholly owned subsidiary organized under Delaware law (the “Delaware Subsidiary”). The Market Opportunities Portfolio contributed a portion of its holdings in the Grayscale Bitcoin Trust to the Delaware Subsidiary. Any net gains that the Delaware Subsidiary recognizes on future sales of the contributed Grayscale Bitcoin Trust shares will be subject to federal and state corporate income tax, but the dividends that the Delaware Subsidiary pays to the Market Opportunities Portfolio (i.e., those gains, net of the tax paid and any other expenses of the Delaware Subsidiary, such as its management and advisory fees) will be eligible to be treated as “qualified dividend income” under the Internal Revenue Code of 1986, as amended (the “Internal Revenue Code”). The Delaware Subsidiary and the Cayman Subsidiary are each referred to herein as a “Subsidiary” and collectively as “Subsidiaries.” Additional information regarding the tax treatment of the Fund is provided in the “Taxes” section of the SAI.

In the future, the Market Opportunities Portfolio may seek to gain additional exposure to the Grayscale Bitcoin Trust that may not produce qualifying income for the Market Opportunities Fund under the Internal Revenue Code if held directly. The Market Opportunities Portfolio will not make any additional investments in the Grayscale Bitcoin Trust if as a result of such investment, its aggregate investment in the Grayscale Bitcoin Trust, either directly or through a Subsidiary, would be more than 15% of its assets at the time of the investment. However, the Portfolio’s investment in the Grayscale Bitcoin Trust may, at times, exceed 15% of its net assets, due to appreciation.

Each Subsidiary invests primarily in the Grayscale Bitcoin Trust. The Market Opportunities Portfolio will invest in its Subsidiaries in a manner that is consistent with the limitations of the federal tax laws, rules and regulations that apply to the Market Opportunities Fund as a “regulated investment

company” (“RIC”) under Subchapter M of Subtitle A, Chapter 1, of the Internal Revenue Code (“Subchapter M”). However, the Market Opportunities Portfolio and each Subsidiary comply with the same fundamental investment restrictions on an aggregate basis, to the extent those restrictions are applicable to the investment activities of each Subsidiary. Each Subsidiary also complies with Section 17 of the 1940 Act relating to affiliated transactions and custody, and the Investment Adviser complies with Section 15 of the 1940 Act, relating to investment advisory contracts with respect to the Subsidiaries. Unlike the Market Opportunities Fund, each Subsidiary does not, and will not, seek to qualify as a RIC. The Market Opportunities Portfolio is the sole shareholder of each Subsidiary and does not expect shares of the Subsidiaries to be offered or sold to other investors. The Subsidiaries include entities that engage in investment activities in securities or other assets that are primarily controlled by the Market Opportunities Portfolio. The Market Opportunities Portfolio does not intend to create or acquire primary control of any entity which primarily engages in investment activities in securities or other assets other than entities wholly-owned by the Market Opportunities Portfolio.

The Market Opportunities Portfolio may maintain during a temporary period, which could be for a short period or a longer period lasting several years or more, of abnormal conditions, a significant portion of its total assets in cash and securities, generally considered to be cash and cash equivalents, including, but not limited to: high quality, U.S. short-term debt securities and money market instruments. The Investment Adviser will invest in such short-term cash positions to the extent that the Investment Adviser is unable to find sufficient investments meeting its criteria and when the Investment Adviser believes the purchase of additional equity securities would not further the investment objective of the Market Opportunities Portfolio during such periods of time. Additionally, to respond to adverse market, economic, political or other conditions, which may persist for short or long periods of time, the Market Opportunities Portfolio may invest up to 100% of its assets in the types of high quality, U.S. short-term debt securities and money market instruments described above.

If the market advances during periods when the Market Opportunities Portfolio is holding a large cash position, the Portfolio may not participate as much as it would have if it had been more fully invested in securities. In the aforementioned temporary defensive periods, the Investment Adviser believes that an additional amount of liquidity in the Market Opportunities Portfolio is desirable both to meet operating requirements and to take advantage of new investment opportunities. When the Market Opportunities Portfolio holds a significant portion of assets in cash and cash equivalents, it may not meet its investment objective.

The Market Opportunities Portfolio held 43.93% of its net assets in the Texas Pacific Land Corporation (the “Land Corporation”) as of March 31, 2024. The Land Corporation is a corporation organized under the laws of the state of New York. One of the largest land owners in Texas, the Land Corporation derives most of its income from oil and gas royalty revenue, land easements and water royalties and sales. The Land Corporation has historically operated with minimal operating expenses, little to no debt and utilized cash flow to return capital to unitholders through share repurchases and dividends. While the Land Corporation has held the majority of its assets since its formation in 1888, the development of energy resources subject to its royalty interests and related land use have experienced rapid growth in recent years due to advances in energy exploration and extraction technologies.

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Under normal circumstances, the Market Opportunities Portfolio invests at least 65% of its net assets in common stocks, convertible securities, warrants and other equity securities having the characteristics of common stocks (such as American Depositary Receipts (“ADRs”), Global Depositary Receipts (“GDRs”) and International Depositary Receipts (“IDRs”)) of U.S. and foreign companies involved in capital markets or related to capital markets, as well as companies involved in the gaming industry. Capital market companies include companies that are engaged in or derive a substantial portion of their revenue from activities with a publicly traded securities exchange, such as equity exchanges and commodity exchanges, including but not limited to clearing firms and brokerage houses. The Market Opportunities Portfolio may also invest in exchange-traded funds (“ETFs”) and purchase and write options for hedging purposes and/or direct investment. The Market Opportunities Portfolio may invest up to 20% of its total assets in convertible and non-convertible debt securities rated below investment grade, also known as junk bonds, or unrated securities that the Investment Adviser has determined to be of comparable quality.

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Principal Investment Risks

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Performance

Performance Information Illustrates Variability of Returns [Text]

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The bar chart and table shown below illustrate the variability of the Market Opportunities Fund’s returns. The bar chart indicates the risks of investing in the Market Opportunities Fund by showing the changes in the Market Opportunities Fund’s performance from year to year (on a calendar year basis). The table shows how the Market Opportunities Fund’s average annual returns, before and after taxes, compare with those of the S&P 500® Index and the MSCI EAFE Index, which represent broad measures of market performance. The past performance of the Market Opportunities Fund, before and after taxes, is not necessarily an indication of how the Market Opportunities Fund or the Market Opportunities Portfolio will perform in the future. Performance reflects fee waivers in effect. If fee waivers were not in place, the Market Opportunities Fund’s performance would be reduced. Updated performance information is available on the Fund’s website at http://www.kineticsfunds.com or by calling the Fund toll-free at (800) 930-3828.

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The bar chart and table shown below illustrate the variability of the Market Opportunities Fund’s returns.

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(800) 930-3828

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http://www.kineticsfunds.com

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The past performance of the Market Opportunities Fund, before and after taxes, is not necessarily an indication of how the Market Opportunities Fund or the Market Opportunities Portfolio will perform in the future.

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The Market Opportunities Fund – No Load ClassCalendar Year Returns as of 12/31

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Best Quarter:	Q1 2021	45.93	%
Worst Quarter:	Q1 2020	-21.60	%

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Best Quarter:

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Mar. 31, 2021

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45.93%

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Worst Quarter:

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Mar. 31, 2020

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(21.60%)

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Average Annual Total Returns as of 12/31/2023

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If you own Fund shares in a tax-deferred account, such as a 401(k) plan or an individual retirement account (“IRA”), the information on after-tax returns is not relevant to your investment.

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No Load Class Prospectus | Kinetics Market Opportunities Fund | Risk Lose Money [Member]

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The Market Opportunities Fund’s after-tax returns as shown in the following table are calculated using historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Your actual after-tax returns depend on your tax situation and may differ from those shown. If you own Fund shares in a tax-deferred account, such as a 401(k) plan or an individual retirement account (“IRA”), the information on after-tax returns is not relevant to your investment.

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No Load Class Prospectus | Kinetics Market Opportunities Fund | Crypto Asset Exposure Risk Member

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Investing in common stocks has inherent risks that could cause you to lose money.

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No Load Class Prospectus | Kinetics Market Opportunities Fund | Crypto Asset Industry Risk Member

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In addition to the general risks of investing in other investment vehicles, the value of the Market Opportunities Portfolio’s indirect investments in crypto assets are subject to fluctuations in the value of the crypto asset, which can be highly volatile. The value of crypto assets is determined by the supply and demand for crypto assets in the global market for the trading of crypto assets, which consists primarily of transactions on crypto asset trading platforms. The value of crypto assets has been, and may continue to be, substantially dependent on speculation, such that trading and investing in crypto assets generally may not be based on fundamental analysis. The Market Opportunities Portfolio’s exposure to crypto assets can result in substantial losses to the Market Opportunities Fund.

asset trading platforms may be more exposed to the risk of market manipulation than exchanges for more traditional assets. Individuals or organizations holding a large amount of crypto assets in which the Market Opportunities Portfolio may invest indirectly (also known as “whales”) may have the ability to manipulate the prices of those crypto assets. Crypto asset trading platforms on which crypto assets are traded are or may become subject to enforcement actions by regulatory authorities. Crypto asset trading platforms that are regulated typically must comply with minimum net worth, cybersecurity, and anti-money laundering requirements, but are not typically required to protect customers or their markets to the same extent that regulated securities exchanges or futures exchanges are required to do so. Furthermore, crypto asset trading platforms may be operating out of compliance with regulations, and many crypto asset trading platforms lack certain safeguards established by more traditional exchanges to enhance the stability of trading on the exchange, such as measures designed to prevent sudden drops in value of items traded on the exchange (i.e., “flash crashes”). As a result, the prices of crypto assets on crypto asset trading platforms may be subject to larger and more frequent sudden declines than assets traded on more traditional exchanges.

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No Load Class Prospectus | Kinetics Market Opportunities Fund | Crypto Asset Regulatory Risk Member

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No Load Class Prospectus | Kinetics Market Opportunities Fund | Risk Nondiversified Status [Member]

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ª Crypto Asset Regulatory Risk: Crypto asset markets in the U.S. exist in a state of regulatory uncertainty. Regulatory changes or actions by Congress as well as U.S. federal or state agencies may adversely affect the value of the Market Opportunities Portfolio’s indirect investments in crypto assets. As digital assets have grown in both popularity and market size, a number of state and federal agencies have issued consumer advisories regarding the risks posed by digital assets to investors. In addition, the Securities and Exchange Commission, U.S. state securities regulators and several foreign governments have issued warnings and instituted legal proceedings in which they argue that certain digital assets may be classified as securities and that both those digital assets and any related initial coin offerings are subject to securities regulations. Additionally, U.S. state and federal, and foreign regulators and legislatures have taken action against virtual currency businesses or enacted restrictive regimes in response to adverse publicity arising from hacks, consumer harm, or criminal activity stemming from virtual currency activity.

Currently, there is relatively limited use of crypto assets in the retail and commercial marketplace, which contributes to price volatility. A lack of expansion by crypto assets into retail and commercial markets, or a contraction of such use, may result in increased volatility or a reduction in the value of crypto assets, either of which could adversely impact the value of the Market Opportunities Portfolio’s investment. In addition, to the extent market participants develop a preference for one crypto asset over another, the value of the less preferred crypto assets would likely be adversely affected.

The Market Opportunities Portfolio’s exposure to crypto assets may change over time and, accordingly, such exposure may not be represented in the Market Opportunities Portfolio’s portfolio at any given time. Many significant aspects of the tax treatment of investments in crypto assets are uncertain, and a direct or indirect investment in crypto assets may produce non-qualifying income. Crypto assets are a new technological innovation with a limited history; it is a highly speculative asset and future regulatory actions or policies may limit, perhaps to a materially adverse extent, the value of the Market Opportunities Portfolio’s indirect investment in crypto assets and the ability to exchange a crypto asset or utilize it for payments.

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No Load Class Prospectus | Kinetics Market Opportunities Fund | Single Stock Concentration Risk Member

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ª Non-Diversification Risks: As a non-diversified investment company, the Market Opportunities Portfolio can invest a large percentage of its assets in a small number of issuers. As a result, a change in the value of any one investment may affect the overall value of the Market Opportunities Portfolio’s shares, and therefore the Market Opportunities Fund’s shares, more than shares of a diversified mutual fund that holds more investments.

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No Load Class Prospectus | Kinetics Market Opportunities Fund | Liquidity Risks Member

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ª Single Stock Concentration Risk: The Market Opportunities Portfolio may hold a large concentration of its net assets in a single security or issuer. Holding a large concentration in a single security or issuer may expose the portfolio to the market volatility of that specific security or issuer if the security or issuer performs worse than the market as a whole, which could adversely affect the Fund’s performance.

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No Load Class Prospectus | Kinetics Market Opportunities Fund | Below Investment Grade Debt Securities Risk Member

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No Load Class Prospectus | Kinetics Market Opportunities Fund | Sector Concentration Risk Member

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No Load Class Prospectus | Kinetics Market Opportunities Fund | Convertible Securities Risks Member

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ª Sector Concentration Risk: Although the Market Opportunities Portfolio will not concentrate its investments in any industries, the Market Opportunities Portfolio may, at certain times, have concentrations in one or more sectors which may cause the Portfolio to be more sensitive to economic changes or events occurring in those sectors, and the Portfolio's investments may be more volatile. As of December 31, 2023, the Portfolio had 47.5% invested in the Mining, Quarrying, and Oil and Gas Extraction sector and 26% invested in the Finance and Insurance sector.

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No Load Class Prospectus | Kinetics Market Opportunities Fund | Exchange-Traded Funds (ETFs) Risks Member

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ª Convertible Securities Risks: Convertible securities are subject to the risks affecting both equity and fixed income securities, including market, credit, liquidity and interest rate risk.

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No Load Class Prospectus | Kinetics Market Opportunities Fund | Foreign Securities Risks Member

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ª Exchange-Traded Funds (ETFs) Risks: ETFs are registered investment companies whose shares are listed and traded on U.S. stock exchanges or otherwise traded in the over-the-counter market. In general, passively-managed ETFs seek to track a specified securities index or a basket of securities that an “index provider,” such as S&P Global, selects as representative of a market, market segment or industry sector. A passively-managed ETF is designed so that its performance will correspond closely with that of the index it tracks. A leveraged ETF will engage in transactions and purchase instruments that give rise to forms of leverage, including, among others, the use of reverse repurchase agreements and other borrowings, the investment of collateral from loans of portfolio securities, the use of when issued, delayed-delivery or forward commitment transactions or short sales. To the extent a fund invests in ETFs that achieve leveraged exposure to their underlying indexes through the use of derivative instruments, the fund will indirectly be subject to leveraging risk. As a shareholder in an ETF, the Market Opportunities Portfolio will bear its pro rata portion of an ETF’s expenses, including advisory fees, in addition to its own expenses. The existence of extreme market volatility or potential lack of an active trading market for an ETF’s shares could result in such shares trading at a significant premium or discount to their NAV.

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No Load Class Prospectus | Kinetics Market Opportunities Fund | Interest Rate Risk Member

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ª Foreign Securities Risks: The Market Opportunities Portfolio may invest in foreign securities directly or through ADRs, GDRs and IDRs. Foreign securities can carry higher returns but involve more risks than those associated with U.S. investments. Additional risks associated with investment in foreign securities include currency fluctuations, political and economic instability, less publicly available information, differences in financial reporting standards and less stringent regulation of securities markets. Foreign securities in which the Portfolio invests may be traded in markets that close before the time that the Portfolio calculates its NAV. Furthermore, certain foreign securities in which the Portfolio invests may be listed on foreign exchanges that trade on weekends or other days when the Portfolio does not calculate its NAV. As a result, the value of the Portfolio’s holdings may change on days when shareholders are not able to purchase or redeem the Market Opportunities Fund’s shares.

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No Load Class Prospectus | Kinetics Market Opportunities Fund | Leveraging Risks Member

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ª Interest Rate Risk: The risk that when interest rates increase, fixed-income securities held by the Market Opportunities Portfolio will decline in value. Long-term fixed-income securities will normally have more price volatility because of this risk than short-term fixed-income securities. A low or negative interest rate environment could cause the Market Opportunities Portfolio’s earnings to fall below the Portfolio’s expense ratio, resulting in a decline in the Portfolio’s share price. A general rise in interest rates may cause investors to move out of fixed income securities on a large scale, which could adversely affect the price and liquidity of fixed income securities. The risks associated with changing interest rates may have unpredictable effects on the markets and the Market Opportunities Portfolio’s investments.

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No Load Class Prospectus | Kinetics Market Opportunities Fund | Management Risks Member

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ª Leveraging Risks: Investments in derivative instruments may give rise to a form of leverage. The Investment Adviser may engage in speculative transactions, which involve substantial risk and leverage. The use of leverage by the Investment Adviser may increase the volatility of the Market Opportunities Portfolio. These leveraged instruments may result in losses to the Market Opportunities Portfolio or may adversely affect the Market Opportunities Portfolio’s NAV or total return, because instruments that contain leverage are more sensitive to changes in interest rates. The Market Opportunities Portfolio may also have to sell assets at inopportune times to satisfy its obligations in connection with such transactions.

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No Load Class Prospectus | Kinetics Market Opportunities Fund | Petroleum And Gas Sector Risk Member

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ª Management Risks: There is no guarantee that the Market Opportunities Fund will meet its investment objective. The Investment Adviser does not guarantee the performance of the Market Opportunities Fund, nor can it assure you that the market value of your investment will not decline.

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No Load Class Prospectus | Kinetics Market Opportunities Fund | Sector Emphasis Risks Member

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ª Petroleum and Gas Sector Risk: The profitability of companies in the oil and gas industry is related to worldwide energy prices, exploration costs and production spending. Companies in the oil and gas industry may be at risk for environmental damage claims and other types of litigation. Companies in the oil and gas industry may be adversely affected by: natural disasters or other catastrophes; changes in exchange rates or interest rates; prices for competitive energy services; economic conditions; tax treatment or government regulation; government intervention; negative public perception; or unfavorable events in the regions where companies operate (e.g., expropriation, nationalization, confiscation of assets and property, imposition of restrictions on foreign investments or repatriation of capital, military coups, social or political unrest, violence or labor unrest). Companies in the oil and gas industry may have significant capital investments in, or engage in transactions involving, emerging market countries, which may heighten these risks.

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No Load Class Prospectus | Kinetics Market Opportunities Fund | Small And Medium-Size Company Risks Member

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ª Sector Emphasis Risks: The Market Opportunities Portfolio’s investments in the capital markets sector subjects it to the risks affecting that sector more than would a fund that invests in a wide variety of market sectors. For instance, companies in the capital markets sector may be adversely affected by changes in economic conditions as well as legislative initiatives, all of which may impact the profitability of companies in this sector. The Market Opportunities Portfolio’s investments in the gaming sector may be adversely affected by changes in economic conditions. The casino industry is particularly susceptible to economic conditions that negatively affect tourism. Casino and gaming companies are highly competitive, and new products, casino concepts and venues are competitive challenges to existing companies. In addition, gaming and related companies are highly regulated, and state and federal legislative changes can significantly impact profitability in those sectors.

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No Load Class Prospectus | Kinetics Market Opportunities Fund | Stock Market Risks Member

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ª Small and Medium-Size Company Risks: The Market Opportunities Portfolio may invest in the equity securities of small and medium-size companies. Small and medium-size companies often have narrower markets and more limited managerial and financial resources than do larger, more established companies. As a result, their performance can be more volatile and they face a greater risk of business failure, which could increase the volatility of the Market Opportunities Portfolio’s assets.

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No Load Class Prospectus | Kinetics Market Opportunities Fund | Stock Selection Risks Member

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ª Stock Market Risks: Stock mutual funds are subject to stock market risks and significant fluctuations in value. If the stock market declines in value, the Market Opportunities Portfolio, and therefore the Market Opportunities Fund, is likely to decline in value and you could lose money on your investment. Natural disasters, public health emergencies (including epidemics and pandemics), geopolitical events, terrorism and other global unforeseeable events may lead to instability in world economies and markets, market volatility and may have adverse long-term effects.

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No Load Class Prospectus | Kinetics Market Opportunities Fund | Subsidiary Risks Member

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ª Stock Selection Risks: The portfolio securities selected by the Investment Adviser may decline in value or not increase in value when the stock market in general is rising and may fail to meet the Market Opportunities Portfolio’s, and therefore the Market Opportunities Fund’s, investment objective.

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No Load Class Prospectus | Kinetics Market Opportunities Fund | Tax Risks Member

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ª Subsidiary Risks: By investing in its Subsidiaries, the Market Opportunities Portfolio is indirectly exposed to the risks associated with each Subsidiary’s investments. Those investments held by the Subsidiaries are generally similar to the investments that are permitted to be held by the Market Opportunities Portfolio and are subject to the same risks that would apply to similar investments if

held directly by the Market Opportunities Portfolio. Each Subsidiary is not registered under the 1940 Act and, unless otherwise noted in this Prospectus, is not subject to all the investor protections of the 1940 Act. In addition, changes in the laws of the United States, Delaware and/or the Cayman Islands could result in the inability of the Market Opportunities Portfolio and/or its Subsidiaries to continue to operate and could adversely affect the Market Opportunities Fund’s performance.

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No Load Class Prospectus | Kinetics Market Opportunities Fund | Valuation Risk Member

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ª Tax Risks: In order to qualify as a RIC, the Market Opportunities Fund must meet certain requirements regarding the source of its income, the diversification of its assets and the distribution of its income. Under the test regarding the source of a RIC’s income, at least 90% of the gross income of the RIC each year must be qualifying income, which consists of dividends, interest, gains on investments in securities and certain other categories of investment income. It appears to be the position of the Internal Revenue Service (the “IRS”) that gain realized on bitcoin investments such as investments in the Grayscale Bitcoin Trust will not be qualifying income. The Market Opportunities Portfolio’s investment in each Subsidiary is expected to provide the Market Opportunities Fund with exposure to such bitcoin investments within the limitations of the Internal Revenue Code for qualification as a RIC because, under applicable tax rules, the earnings of each Subsidiary will be qualifying income for the RIC when distributed by the Subsidiary even though the income would not be qualifying income if earned directly by the RIC or directly by an entity classified as a partnership for federal income tax purposes, such as the Market Opportunities Portfolio, in which the RIC invests. There is a risk, however, that the IRS might assert that the income derived from the Market Opportunities Portfolio’s investment in a Subsidiary will not be considered qualifying income. If the Market Opportunities Fund were to fail to qualify as a RIC and became subject to federal income tax, shareholders of the Market Opportunities Fund would be subject to diminished returns. Additionally, the Market Opportunities Fund invests, directly and indirectly, in entities that take the position that they are not subject to entity-level tax. If any such entity is reclassified as a corporation for U.S. federal income tax purposes, shareholders of the Market Opportunities Fund would be subject to diminished returns. Changes in the laws of the United States, Delaware and/or the Cayman Islands could result in the inability of the Market Opportunities Portfolio and/or its Subsidiaries to operate as described in this Prospectus and could adversely affect the Market Opportunities Fund. For example, the Cayman Islands does not currently impose any income, corporate or capital gains tax or withholding tax on the Cayman Subsidiary. If Cayman Islands law changes such that the Cayman Subsidiary must pay Cayman Islands taxes, Market Opportunities Fund shareholders would likely suffer decreased investment returns.

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No Load Class Prospectus | Kinetics Market Opportunities Fund | Volatility Risk Member

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ª Valuation Risk: The sales price the Portfolio could receive for any particular portfolio investment may differ from the Portfolio’s valuation of the investment, particularly for securities or other investments, such as Bitcoin, that trade in thin or volatile markets or that are valued using a fair value methodology. Valuation may be more difficult in times of market turmoil since many investors and market makers may be reluctant to purchase complex instruments or quote prices for them. Fair valuation of the Portfolio's investments involves subjective judgment. The Portfolio’s ability to value its investments may be impacted by technological issues and/or errors by pricing services or other third-party service providers. Shares of Grayscale Bitcoin Trust are intended to reflect the price of bitcoin assets, less fees and expenses, and shares of the Grayscale Bitcoin Trust have historically traded, and may continue to trade, at a significant discount or premium to net asset value. As such, the price of Grayscale Bitcoin Trust may go down even if the price of the underlying asset, bitcoin, remains unchanged. Additionally, shares that trade at a premium mean that an investor who purchases $1 of a portfolio will actually own less than $1 in assets.

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No Load Class Prospectus | Kinetics Market Opportunities Fund | S&P 500® Index (reflects no deductions for fees, expenses or taxes)

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ª Volatility Risk: The Portfolio may have investments, including but not limited to Bitcoin, that appreciate or depreciate significantly in value over short periods of time. This may cause the

Portfolio’s net asset value per share to experience significant increases or declines in value over short periods of time.

Index No Deduction for Fees, Expenses, Taxes [Text]

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(reflects no deductions for fees, expenses or taxes)

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S&P 500® Index (reflects no deductions for fees, expenses or taxes)

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26.29%

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15.69%

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12.03%

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9.79%

No Load Class Prospectus | Kinetics Market Opportunities Fund | MSCI EAFE Index (reflects no deductions of fees, expenses or taxes)

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Jan. 31, 2006

Index No Deduction for Fees, Expenses, Taxes [Text]

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(reflects no deductions for fees, expenses or taxes)

rr_AverageAnnualReturnLabel

MSCI EAFE Index (reflects no deductions for fees, expenses or taxes)

rr_AverageAnnualReturnYear01

18.24%

rr_AverageAnnualReturnYear05

8.16%

rr_AverageAnnualReturnYear10

4.28%

rr_AverageAnnualReturnSinceInception

4.08%

No Load Class Prospectus | Kinetics Market Opportunities Fund | No Load Class

rr_AverageAnnualReturnInceptionDate

Jan. 31, 2006

rr_ProspectusLineItems

Redemption Fee (as a percentage of Amount Redeemed)

dei_TradingSymbol

KMKNX

rr_RedemptionFeeOverRedemption

(2.00%)

^[15]

rr_ManagementFeesOverAssets

1.25%

^[15]

rr_DistributionAndService12b1FeesOverAssets

none

rr_Component1OtherExpensesOverAssets

0.25%

rr_Component2OtherExpensesOverAssets

0.26%

rr_OtherExpensesOverAssets

0.51%

rr_ExpensesOverAssets

1.76%

rr_FeeWaiverOrReimbursementOverAssets

(0.36%)

^[16]

rr_NetExpensesOverAssets

1.40%

rr_ExpenseExampleYear01

$ 143

rr_ExpenseExampleYear03

519

rr_ExpenseExampleYear05

920

rr_ExpenseExampleYear10

$ 2,043

rr_AnnualReturn2014

(5.55%)

rr_AnnualReturn2015

(9.11%)

rr_AnnualReturn2016

20.45%

rr_AnnualReturn2017

47.28%

rr_AnnualReturn2018

(10.86%)

rr_AnnualReturn2019

22.76%

rr_AnnualReturn2020

19.55%

rr_AnnualReturn2021

28.04%

rr_AnnualReturn2022

14.98%

rr_AnnualReturn2023

(7.33%)

rr_AverageAnnualReturnLabel

Return Before Taxes

rr_AverageAnnualReturnYear01

(7.33%)

rr_AverageAnnualReturnYear05

14.90%

rr_AverageAnnualReturnYear10

10.52%

rr_AverageAnnualReturnSinceInception

9.74%

No Load Class Prospectus | Kinetics Market Opportunities Fund | No Load Class | After Taxes on Distributions

rr_AverageAnnualReturnInceptionDate

Jan. 31, 2006

rr_ProspectusLineItems

rr_AverageAnnualReturnLabel

Return After Taxes on Distributions

rr_AverageAnnualReturnYear01

(7.58%)

rr_AverageAnnualReturnYear05

14.64%

rr_AverageAnnualReturnYear10

10.04%

No Load Class Prospectus | Kinetics Market Opportunities Fund | No Load Class | After Taxes on Distributions and Sales

rr_AverageAnnualReturnSinceInception

9.38%

rr_ProspectusLineItems

rr_AverageAnnualReturnLabel

Return After Taxes on Distributions and Sale of Fund Shares(1)

^[17]

rr_AverageAnnualReturnYear01

(4.27%)

^[17]

rr_AverageAnnualReturnYear05

11.99%

^[17]

rr_AverageAnnualReturnYear10

8.50%

^[17]

No Load Class Prospectus | Kinetics Multi-Disciplinary Income Fund

rr_AverageAnnualReturnSinceInception

8.25%

^[17]

rr_ProspectusLineItems

rr_RiskReturnHeading

THE MULTI-DISCIPLINARY INCOME FUND

rr_ObjectiveHeading

Investment Objectives

rr_ObjectivePrimaryTextBlock

The investment objective of the Multi-Disciplinary Income Fund is total return. The Multi-Disciplinary Income Fund is the sole “feeder fund” to The Multi-Disciplinary Income Portfolio, a series of Kinetics Portfolios Trust.

rr_ExpenseHeading

Fees and Expenses of the Fund

rr_ExpenseNarrativeTextBlock

This table describes the fees and expenses that you may pay if you buy, hold, and sell shares of the Multi-Disciplinary Income Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the table and example below.

rr_ShareholderFeesCaption

SHAREHOLDER FEES(fees paid directly from your investment)

Fee Waiver or Reimbursement over Assets, Date of Termination

rr_OperatingExpensesCaption

ANNUAL FUND OPERATING EXPENSES (2)(expenses that you pay each year as a percentage of the value of your investment)

^[18]

rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination

April 30, 2025

rr_PortfolioTurnoverHeading

Portfolio Turnover.

rr_PortfolioTurnoverTextBlock

The Multi-Disciplinary Income Portfolio pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the Example, affect the Multi-Disciplinary Income Portfolio’s, and therefore the Multi-Disciplinary Income Fund’s, performance. During the most recent fiscal year, the Multi-Disciplinary Income Portfolio’s portfolio turnover rate was 37% of the average value of its portfolio.

rr_PortfolioTurnoverRate

37.00%

Expenses Restated to Reflect Current [Text]

rr_ExpensesRepresentBothMasterAndFeeder

This table and the example below reflect the aggregate expenses of the Multi-Disciplinary Income Fund and the Multi-Disciplinary Income Portfolio. The management fees paid by the Multi-Disciplinary Income Fund reflect the proportionate share of fees allocated to the Multi-Disciplinary Income Fund from the Multi-Disciplinary Income Portfolio.

rr_ExpensesRestatedToReflectCurrent

Expense information has been restated to reflect current fees.

Expenses Not Correlated to Ratio Due to Acquired Fund Fees [Text]

rr_ExpensesNotCorrelatedToRatioDueToAcquiredFundFees

Total Annual Fund Operating Expenses do not correlate to the ratio of operating expenses to average net assets before expense reimbursement found in the “Financial Highlights” section of this Prospectus, which reflects the Multi-Disciplinary Income Fund’s operating Expenses and does not include acquired fund fees and expenses.

rr_ExpenseExampleHeading

Example.

rr_ExpenseExampleNarrativeTextBlock

This Example is intended to help you compare the cost of investing in the Multi-Disciplinary Income Fund with the cost of investing in other mutual funds. This Example assumes that you invest $10,000 in the Multi-Disciplinary Income Fund for the time periods indicated and then redeem all of your shares at the end of these periods. The Example also assumes that your investment has a 5% return each year and that the Multi-Disciplinary Income Fund’s operating expenses remain the same (taking into account the expense limitation only in the first year).

rr_ExpenseExampleByYearCaption

Although your actual costs may be higher or lower, based on these assumptions your cost for the Multi-Disciplinary Income Fund would be:

rr_StrategyHeading

Principal Investment Strategy

rr_StrategyNarrativeTextBlock

The Multi-Disciplinary Income Fund is a diversified fund that invests all of its investable assets in the Multi-Disciplinary Income Portfolio, a series of Kinetics Portfolios Trust. “Total Return” sought by the Multi-Disciplinary Income Portfolio consists of income earned on the Multi-Disciplinary Income Portfolio’s investments, plus capital appreciation. The Multi-Disciplinary Income Portfolio utilizes a two-part investment strategy, which includes fixed-income components, including fixed-income exchange-traded funds (“ETFs”), collateralized loan obligations (“CLOs”) and senior secured corporate loans, and derivatives components. Under normal circumstances, the Multi-Disciplinary Income Portfolio will invest at least 65% of its net assets in fixed-income securities (which includes CLOs and corporate loans), derivatives and cash or cash equivalents committed as collateral for written option contracts.

There is no limit on the amount of assets the Multi-Disciplinary Income Portfolio may invest in fixed-income securities. The Multi-Disciplinary Income Portfolio may invest in the debt tranches of CLOs. The CLO debt tranches may have any stated maturity and may be rated (at time of issuance), from “AAA” to and including “B-” (or equivalent by a nationally recognized statistical rating organization (“NRSRO”)), or if unrated, determined to be of comparable credit quality by the Investment Adviser. An NRSRO is a credit rating agency that is registered with the U.S. Securities and Exchange Commission (“SEC”) that issues credit ratings that the SEC permits other financial firms to use for certain regulatory purposes.

The Multi-Disciplinary Income Portfolio may invest up to 35% of its net assets in senior secured corporate loans, issued by either public or privately owned companies. Senior secured corporate loans will be first lien or second lien loans, have maturities of up to 8 years, and may be 100% rated below investment grade by an NRSRO.

The Multi-Disciplinary Income Portfolio may invest up to 20% of its total assets in selling equity put options. The Multi-Disciplinary Income Portfolio may also invest in U.S. Treasury note futures; selling or buying equity calls, bond calls, and bond put options, as well as other derivatives, to manage risk or to enhance return. The Multi-Disciplinary Income Portfolio may also buy puts on specific underlying equity securities that are traded on a national securities exchange. The Multi-Disciplinary Income Portfolio will not invest more than 15% of its net assets in illiquid investments.

The Investment Adviser uses a bottom-up approach in managing the Multi-Disciplinary Income Fund, which means that the focus is on the analysis of individual securities. By engaging in quantitative and qualitative analysis of individual securities, the Investment Adviser examines an investment’s current valuation, income potential, risk adjusted return and credit profile.

The Multi-Disciplinary Income Portfolio will invest in CLOs and senior secured corporate loans with a minimum initial total offering size of $250 million, that are floating rate and are U.S. dollar denominated. The Multi-Disciplinary Income Portfolio may purchase CLOs and senior secured corporate loans in both the primary and secondary markets.

The Multi-Disciplinary Income Portfolio will generally not invest more than 5% of its portfolio in any single investment measured at the time of purchase. It is intended that the Multi-Disciplinary Income Portfolio will hold between 20 to 75 investments with a position weighing between 1% to 5% per security. The Multi-Disciplinary Income Portfolio may temporarily deviate from this diversification weighting due to, among other reasons, market conditions and the initial size of the fund as determined by the Investment Adviser, in its sole discretion. The Investment Adviser may sell a security due to changes in credit characteristics or outlook, as well as changes in portfolio strategy or cash flow needs. A security may also be sold and replaced with one that presents a better value or risk adjusted return profile. The Investment Adviser may actively trade Multi-Disciplinary Income Portfolio securities.

The Multi-Disciplinary Income Portfolio may maintain during a temporary period, which could be for a short period or a longer period lasting several years or more, of abnormal conditions, a significant portion of its total assets in cash and securities, generally considered to be cash and cash equivalents, including, but not limited to: high quality, U.S. short-term debt securities and money market instruments. The Investment Adviser will invest in such short-term cash positions to the extent that the Investment Adviser is unable to find sufficient investments meeting its criteria. Additionally, to respond to adverse market, economic, political or other conditions, which may persist for short or long periods of time, the Multi-Disciplinary Income Portfolio may invest up to 100% of its assets in the types of high quality, U.S. short-term debt securities and money market instruments described above.

If the market advances during periods when the Multi-Disciplinary Income Portfolio is holding a large cash position, the Portfolio may not participate as much as it would have if it had been more fully invested in securities. In the aforementioned temporary defensive periods, the Investment Adviser believes that an additional amount of liquidity in the Multi-Disciplinary Income Portfolio is desirable both to meet operating requirements and to take advantage of new investment opportunities. When the Multi-Disciplinary Income Portfolio holds a significant portion of assets in cash and cash equivalents, it may not meet its investment objective.

rr_StrategyPortfolioConcentration

Under normal circumstances, the Multi-Disciplinary Income Portfolio will invest at least 65% of its net assets in fixed-income securities (which includes CLOs and corporate loans), derivatives and cash or cash equivalents committed as collateral for written option contracts.

rr_RiskHeading

Principal Investment Risks

rr_BarChartAndPerformanceTableHeading

Performance

Performance Information Illustrates Variability of Returns [Text]

rr_PerformanceNarrativeTextBlock

The bar chart and table shown below illustrate the variability of the Multi-Disciplinary Income Fund’s returns. The bar chart indicates the risks of investing in the Multi-Disciplinary Income Fund by showing the changes in the Multi-Disciplinary Income Fund’s performance from year to year (on a calendar year basis). The table shows how the Multi-Disciplinary Income Fund’s average annual returns, before and after taxes (after taking into account any sales charges) compare with those of the Bloomberg U.S. Aggregate Bond Index and Bloomberg U.S. Corporate High Yield Bond Index, which represent broad measures of market performance. The past performance of the Multi-Disciplinary Income Fund, before and after taxes, is not necessarily an indication of how the Multi-Disciplinary Income Fund or the Multi-Disciplinary Income Portfolio will perform in the future. Performance reflects fee waivers in effect. If fee waivers were not in place, the Multi-Disciplinary Income Fund’s performance would be reduced. Updated

performance information is available on the Fund’s website at http://www.kineticsfunds.com or by calling the Fund toll-free at (800) 930-3828.

rr_PerformanceInformationIllustratesVariabilityOfReturns

The bar chart and table shown below illustrate the variability of the Multi-Disciplinary Income Fund’s returns.

rr_PerformanceAvailabilityPhone

(800) 930-3828

rr_PerformanceAvailabilityWebSiteAddress

http://www.kineticsfunds.com

rr_PerformancePastDoesNotIndicateFuture

The past performance of the Multi-Disciplinary Income Fund, before and after taxes, is not necessarily an indication of how the Multi-Disciplinary Income Fund or the Multi-Disciplinary Income Portfolio will perform in the future.

rr_BarChartHeading

The Multi-Disciplinary Income Fund – No Load ClassCalendar Year Returns as of 12/31

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Best Quarter:	Q2 2020	6.64	%
Worst Quarter:	Q1 2020	-10.52	%

rr_HighestQuarterlyReturnLabel

Best Quarter:

rr_BarChartHighestQuarterlyReturnDate

Jun. 30, 2020

rr_BarChartHighestQuarterlyReturn

6.64%

rr_LowestQuarterlyReturnLabel

Worst Quarter:

rr_BarChartLowestQuarterlyReturnDate

Mar. 31, 2020

rr_BarChartLowestQuarterlyReturn

(10.52%)

rr_PerformanceTableHeading

Average Annual Total Returns as of 12/31/2023

rr_PerformanceTableUsesHighestFederalRate

rr_PerformanceTableNotRelevantToTaxDeferred

If you own Fund shares in a tax-deferred account, such as a 401(k) plan or an individual retirement account (“IRA”), the information on after-tax returns is not relevant to your investment.

rr_PerformanceTableExplanationAfterTaxHigher

The Return After Taxes on Distributions and Sale of Fund Shares is higher than other return figures when a capital loss occurs upon the redemption of Fund shares.

No Load Class Prospectus | Kinetics Multi-Disciplinary Income Fund | Risk Lose Money [Member]

rr_PerformanceTableNarrativeTextBlock

The Multi-Disciplinary Income Fund’s after-tax returns as shown in the following table are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Your actual after-tax returns depend on your tax situation and may differ from those shown. If you own Fund shares in a tax-deferred account, such as a 401(k) plan or an individual retirement account (“IRA”), the information on after-tax returns is not relevant to your investment. The Return After Taxes on Distributions and Sale of Fund Shares is higher than other return figures when a capital loss occurs upon the redemption of Fund shares.

rr_ProspectusLineItems

No Load Class Prospectus | Kinetics Multi-Disciplinary Income Fund | Collateralized Loan Obligations Leveraging Risk Member

rr_RiskTextBlock

The Multi-Disciplinary Income Portfolio’s investments have inherent risks that could cause you to lose money.

rr_ProspectusLineItems

No Load Class Prospectus | Kinetics Multi-Disciplinary Income Fund | Collateralized Loan Obligations Manager Risk Member

rr_RiskTextBlock

ª Collateralized Loan Obligations Leveraging Risk: CLOs are typically leveraged, and such leverage will magnify the loss on CLO investments, which may in turn magnify the loss experienced by the Multi-Disciplinary Income Fund. The cumulative effect of the use of leverage with respect to any investments in a market that moves adversely to such investments could result in a substantial loss that would be greater than if the Multi-Disciplinary Income Portfolio’s investments were not leveraged.

rr_ProspectusLineItems

No Load Class Prospectus | Kinetics Multi-Disciplinary Income Fund | Collateralized Loan Obligations Risk Member

rr_RiskTextBlock

ª Collateralized Loan Obligations Manager Risk: CLO managers are responsible for selecting, managing, and replacing the underlying collateral assets within a CLO. CLO managers may have limited operating histories, may be subject to conflicts of interests, including managing the assets of other clients or other investment vehicles, or receiving fees that incentivize maximizing the yield, and indirectly the risk, of a CLO. Adverse developments with respect to a CLO manager, such as personnel and resource constraints, regulatory issues or other developments that may impact the ability and/or performance of the CLO manager, may adversely impact the performance of the CLO debt tranches in which the Multi-Disciplinary Income Portfolio invests.

rr_ProspectusLineItems

No Load Class Prospectus | Kinetics Multi-Disciplinary Income Fund | Covenant Lite Corporate Loans Risk Member

rr_RiskTextBlock

ª Collateralized Loan Obligations Risk: A CLO is a securitization vehicle collateralized by a pool of credit-related assets. Generally, these assets are below investment grade and are subject to greater credit risk, price volatility and risk of loss than investment grade securities. CLO securities present risks similar to those of other types of credit investments, including default (credit), interest rate and prepayment risks. The extent of these risks depends largely on the type of securities used as collateral and the debt tranche of the CLOs in which the Multi-Disciplinary Income Portfolio invests. In addition, CLOs are often governed by a complex series of legal documents and contracts, which increases the risk of dispute over the interpretation and enforceability of such documents relative to other types of investments. There is also a risk that the trustee of a CLO does not properly carry out its duties to the CLO, potentially resulting in loss to the CLO.

rr_ProspectusLineItems

No Load Class Prospectus | Kinetics Multi-Disciplinary Income Fund | Credit/Default Risk Member

rr_RiskTextBlock

ª Covenant Lite Corporate Loans Risk: Certain underlying corporate loans in which the Multi-Disciplinary Income Portfolio may invest on a direct basis and/or indirectly through an investment in a CLO debt tranche, may be “covenant lite”, which have few or no financial maintenance covenants that would require a borrower to maintain. As a result, there may be delays in enforcing our interests in such covenant lite securities, which may result in losses and adversely affect the Multi-Disciplinary Income Fund.

rr_ProspectusLineItems

No Load Class Prospectus | Kinetics Multi-Disciplinary Income Fund | Cybersecurity Risk Member

rr_RiskTextBlock

ª Credit/Default Risk: The Multi-Disciplinary Income Portfolio is subject to the risks associated with the credit quality of CLO debt tranches and corporate loans. Credit quality measures the likelihood that the obligor will be able to meet its debt service obligations. Credit risk is the risk that an obligor will be unable to make principal and interest payments when due, or default on its obligations. Most CLO debt tranches and corporate loans which would be considered for investment by the Multi-Disciplinary Income Portfolio, will have credit ratings issued from NRSROs such as S&P Global,

Fitch, and Moody’s. These NRSROs assign ratings to the obligor by assessing the likelihood of issuer default.

rr_ProspectusLineItems

No Load Class Prospectus | Kinetics Multi-Disciplinary Income Fund | Derivatives Risk Member

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ª Cybersecurity Risk: Cybersecurity incidents may allow an unauthorized party to gain access to Multi-Disciplinary Income Fund assets or proprietary information, or cause the fund, the Investment Adviser, and/or other service providers (including custodians and financial intermediaries) to suffer data breaches or data corruption. Additionally, cybersecurity failures or breaches of the electronic systems of the Multi-Disciplinary Income Fund, the Investment Adviser, or the Multi-Disciplinary Income Fund’s other service providers, or the issuers of securities in which the Multi-Disciplinary Income Portfolio invests have the ability to disrupt and negatively affect the Fund’s business operations, including the ability to purchase and sell fund shares, potentially resulting in financial losses to the Multi-Disciplinary Income Fund and its shareholders.

rr_ProspectusLineItems

No Load Class Prospectus | Kinetics Multi-Disciplinary Income Fund | Fixed Income Risk Member

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ª Derivatives Risk: The Multi-Disciplinary Income Portfolio’s investments in futures, options and other derivative instruments may result in loss. Derivative instruments may be illiquid, difficult to price and leveraged so that small changes may produce disproportionate losses to the Multi-Disciplinary Income Portfolio. The use of derivatives is a highly specialized activity that involves investment techniques and risks different from those associated with investments in more traditional securities and instruments.

rr_ProspectusLineItems

No Load Class Prospectus | Kinetics Multi-Disciplinary Income Fund | Fixed Income Risk, Prepayment Risk Member

rr_RiskTextBlock

ª Fixed Income Risk: Fixed income securities are subject to credit risk and interest rate risk. Credit risk, as described more fully herein, refers to the possibility that the issuer of a debt security will be unable to make interest payments or repay principal when it becomes due. Interest rate risk refers to fluctuations in the value of a debt security resulting from changes in the general level of interest rates. Prices of fixed income securities tend to move inversely with changes in interest rates. Additionally, investments in fixed income securities are subject to the following risks:

•Prepayment Risk. CLO debt tranches and corporate loans are subject to prepayment risk. During periods when credit spreads are contracting, a callable CLO debt tranche or corporate loan held by the Multi-Disciplinary Income Portfolio may be “called” and repaid before its stated maturity, and the Multi-Disciplinary Income Portfolio may have to reinvest the proceeds at a lower interest rate, resulting in a decline in the Multi-Disciplinary Income Fund’s income. CLOs are also typically structured such that, after a specified time period (i.e., the non-call period), the majority

investor(s) in the equity tranche can call (i.e., require the CLO issuer to redeem) the CLO debt tranches issued by the CLO in full, plus accrued interest. The Multi-Disciplinary Income Portfolio may not be able to accurately predict when or which of its CLO investments may be called, resulting in the Multi-Disciplinary Income Portfolio having to reinvest the proceeds in unfavorable market conditions, which in turn could cause a decline in the Multi-Disciplinary Income Fund’s income.

•Credit Risk of Underlying CLO Collateral. The ability of the underlying collateral assets held by the CLOs to generate sufficient cash flow to meet the debt service requirements of the CLO debt tranches on a full and timely basis when principal and/or interest payments are due, may be adversely affected by payment defaults of certain collateral assets held by the CLO.

•Extension Risk. During periods when credit spreads are increasing, certain CLO debt tranches may be paid off substantially more slowly than originally anticipated and the value of those securities may fall sharply, resulting in a decline in the Multi-Disciplinary Income Fund’s income and potentially in the value of the Multi-Disciplinary Income Portfolio’s investments.

•Interest Rate Risk: The risk that when interest rates increase, fixed-income securities held by the Multi-Disciplinary Income Portfolio may decline in value. Floating interest rate securities may increase or decrease in value in response to changes in interest rates, although generally to a lesser degree than fixed-income securities.

•Floating Interest Rate Risk. CLO tranches and corporate loans have floating interest rates, and therefore their market price may be less sensitive to interest rate changes than securities with fixed interest rates but may still decline in value if their interest rates do not rise as much, or as quickly, as interest rates in general. Conversely, floating rate securities will not generally increase in value if interest rates decline. Since the Multi-Disciplinary Income Portfolio invests primarily in floating rate CLO debt tranches and corporate loans, a decline in interest rates may result in a reduction of income and may adversely affect the value of the Multi-Disciplinary Income Fund’s shares. The interest rate for a CLO tranche resets quarterly and for corporate loans usually resets either monthly or quarterly, by reference to a benchmark interest rate index. The impact of interest rate changes on floating rate CLO investments and corporate loans is typically mitigated by the periodic interest rate reset of the investments. Securities with longer durations tend to be more sensitive to interest rate changes, usually making them more volatile than securities with shorter durations.

•Income Risk. The Multi-Disciplinary Income Fund’s income may decline if interest rates fall. This decline in income can occur because investments held by the Multi-Disciplinary Income Portfolio will have floating or variable interest rates.

•Privately Issued Securities Risk. The Multi-Disciplinary Income Portfolio may invest in privately issued securities, including those that are normally purchased pursuant to Rule 144A or Regulation S under the Securities Act of 1933, as amended. Privately issued securities typically may be resold only to qualified institutional buyers, in a privately negotiated transaction, to a limited number of purchasers, or in limited quantities after they have been held for a specified period of time and other conditions are met for an exemption from registration. Because there may be relatively few potential purchasers for such securities, especially under adverse market or

economic conditions or in the event of adverse changes in the financial condition of the issuer, the Multi-Disciplinary Income Portfolio may find it more difficult to sell such securities when it may be advisable to do so or it may be able to sell such securities only at lesser prices than if such securities were more widely held and traded. At times, it also may be more difficult to determine the fair value of such securities for the purposes of computing the Fund’s NAV due to the absence of an active trading market. The determinations of the fair value of the Multi-Disciplinary Income Portfolio’s investments may cause its NAV on a given date to understate or overstate, possibly materially, the value that the Multi-Disciplinary Income Portfolio may ultimately realize on one or more of its investments. There can also be no assurance that a privately issued security previously deemed to be liquid when purchased will continue to be liquid for as long as it is held by the Multi-Disciplinary Income Portfolio, and its value may decline as a result.

rr_ProspectusLineItems

No Load Class Prospectus | Kinetics Multi-Disciplinary Income Fund | Fixed Income Risk, Credit Risk Of Underlying CLO Collateral Risk Member

rr_RiskTextBlock

Prepayment Risk. CLO debt tranches and corporate loans are subject to prepayment risk. During periods when credit spreads are contracting, a callable CLO debt tranche or corporate loan held by the Multi-Disciplinary Income Portfolio may be “called” and repaid before its stated maturity, and the Multi-Disciplinary Income Portfolio may have to reinvest the proceeds at a lower interest rate, resulting in a decline in the Multi-Disciplinary Income Fund’s income. CLOs are also typically structured such that, after a specified time period (i.e., the non-call period), the majority

rr_ProspectusLineItems

No Load Class Prospectus | Kinetics Multi-Disciplinary Income Fund | Fixed Income Risk, Extension Risk Member

rr_RiskTextBlock

Credit Risk of Underlying CLO Collateral. The ability of the underlying collateral assets held by the CLOs to generate sufficient cash flow to meet the debt service requirements of the CLO debt tranches on a full and timely basis when principal and/or interest payments are due, may be adversely affected by payment defaults of certain collateral assets held by the CLO.

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No Load Class Prospectus | Kinetics Multi-Disciplinary Income Fund | Fixed Income Risk, Interest Rate Risk Member

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Extension Risk. During periods when credit spreads are increasing, certain CLO debt tranches may be paid off substantially more slowly than originally anticipated and the value of those securities may fall sharply, resulting in a decline in the Multi-Disciplinary Income Fund’s income and potentially in the value of the Multi-Disciplinary Income Portfolio’s investments.

rr_ProspectusLineItems

No Load Class Prospectus | Kinetics Multi-Disciplinary Income Fund | Fixed Income Risk, Floating Interest Rate Risk Member

rr_RiskTextBlock

Interest Rate Risk: The risk that when interest rates increase, fixed-income securities held by the Multi-Disciplinary Income Portfolio may decline in value. Floating interest rate securities may increase or decrease in value in response to changes in interest rates, although generally to a lesser degree than fixed-income securities.

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No Load Class Prospectus | Kinetics Multi-Disciplinary Income Fund | Fixed Income Risk, Income Risk Member

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Floating Interest Rate Risk. CLO tranches and corporate loans have floating interest rates, and therefore their market price may be less sensitive to interest rate changes than securities with fixed interest rates but may still decline in value if their interest rates do not rise as much, or as quickly, as interest rates in general. Conversely, floating rate securities will not generally increase in value if interest rates decline. Since the Multi-Disciplinary Income Portfolio invests primarily in floating rate CLO debt tranches and corporate loans, a decline in interest rates may result in a reduction of income and may adversely affect the value of the Multi-Disciplinary Income Fund’s shares. The interest rate for a CLO tranche resets quarterly and for corporate loans usually resets either monthly or quarterly, by reference to a benchmark interest rate index. The impact of interest rate changes on floating rate CLO investments and corporate loans is typically mitigated by the periodic interest rate reset of the investments. Securities with longer durations tend to be more sensitive to interest rate changes, usually making them more volatile than securities with shorter durations.

rr_ProspectusLineItems

No Load Class Prospectus | Kinetics Multi-Disciplinary Income Fund | Fixed Income Risk, Privately Issued Securities Risk Member

rr_RiskTextBlock

Income Risk. The Multi-Disciplinary Income Fund’s income may decline if interest rates fall. This decline in income can occur because investments held by the Multi-Disciplinary Income Portfolio will have floating or variable interest rates.

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No Load Class Prospectus | Kinetics Multi-Disciplinary Income Fund | LIBOR Discontinuance Or Unavailability Risk Member

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Privately Issued Securities Risk. The Multi-Disciplinary Income Portfolio may invest in privately issued securities, including those that are normally purchased pursuant to Rule 144A or Regulation S under the Securities Act of 1933, as amended. Privately issued securities typically may be resold only to qualified institutional buyers, in a privately negotiated transaction, to a limited number of purchasers, or in limited quantities after they have been held for a specified period of time and other conditions are met for an exemption from registration. Because there may be relatively few potential purchasers for such securities, especially under adverse market or

rr_ProspectusLineItems

No Load Class Prospectus | Kinetics Multi-Disciplinary Income Fund | Liquidity Risks Member

rr_RiskTextBlock

LIBOR Discontinuance or Unavailability Risk: The CLO debt tranches and corporate loans in which the Multi-Disciplinary Income Portfolio invests may bear interest based upon LIBOR (London Interbank Offered Rate), which is intended to represent the rate at which contributing banks may obtain short-term borrowings from each other in the London interbank market. As of June 30, 2023, almost all settings of LIBOR have ceased to be published, except that certain widely used U.S. dollar LIBORs will continue to be published on a temporary, synthetic and non-representative basis through at least September 30, 2024. In some instances, regulators have restricted new use of LIBORs prior to the date when synthetic LIBORs will cease to be published. SOFR, which has been used increasingly on a voluntary basis in new instruments and transactions, is a broad measure of the cost of borrowing cash overnight collateralized by U.S. Treasury securities in the repurchase agreement market. On December 16, 2022, the Federal Reserve Board adopted regulations implementing the Adjustable Interest Rate Act, which provides a statutory fallback mechanism to replace LIBOR, by identifying benchmark rates based on SOFR that will replace LIBOR in certain financial contracts after June 30, 2023. These regulations apply only to contracts governed by U.S. law, among other limitations. The transition away from LIBOR could have a significant impact on the financial markets in general and may also present heightened risk to market participants. It is difficult to predict the full impact of the transition away from LIBOR on the Multi-Disciplinary Income Portfolio and Multi-Disciplinary Income Fund until new reference rates and fallbacks for both legacy and new instruments and contracts are commercially accepted and market practices become settled.

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No Load Class Prospectus | Kinetics Multi-Disciplinary Income Fund | Below Investment Grade Debt Securities Risk Member

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ª Liquidity Risk: Liquidity risk refers to the possibility that the Multi-Disciplinary Income Portfolio may not be able to buy or sell a security at a favorable price or time. Consequently, the Multi-Disciplinary Income Portfolio may have to accept a lower price to sell a security, sell other securities to raise cash, or decline an investment opportunity, any of which could have a negative effect on the Multi-Disciplinary Income Fund’s performance. Infrequent trading of securities also may lead to an increase in their price volatility. While CLO debt tranches and corporate loans in which the Multi-Disciplinary Income Portfolio seeks to invest are expected to be supported by a secondary market, it is possible that they may be characterized as illiquid investments under adverse market conditions resulting in a limited market for the resale for such securities or affected by the liquidity in the fixed income market, generally.

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No Load Class Prospectus | Kinetics Multi-Disciplinary Income Fund | Exchange-Traded Funds (ETFs) Risks Member

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ª Below Investment Grade Securities Risks. Securities rated “BB+” or below by S&P or “Ba1” or below by Moody’s are known as high yield securities and are commonly referred to as “junk debt.”

Such securities entail greater price volatility and credit and interest rate risk than investment-grade securities. Analysis of the creditworthiness of high yield issuers is more complex than for higher-rated securities, making it more difficult for the Investment Adviser to accurately predict risk. There is a greater risk with high yield securities that an issuer will not be able to make principal and interest payments when due. If the Multi-Disciplinary Income Portfolio pursues missed payments, there is a risk that fund expenses could increase. In addition, lower-rated securities may not trade as often and may be less liquid than higher-rated securities, especially during periods of economic uncertainty or change. As a result of all these factors, these securities are generally considered to be speculative.

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No Load Class Prospectus | Kinetics Multi-Disciplinary Income Fund | Management Risk Member

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ª Exchange-Traded Funds (ETFs) Risk: ETFs are registered investment companies whose shares are listed and traded on U.S. stock exchanges or otherwise traded in the over-the-counter market. In general, passively-managed ETFs seek to track a specified securities index or a basket of securities that an “index provider,” such as S&P Global, selects as representative of a market, market segment or industry sector. A passively-managed ETF is designed so that its performance will correspond closely with that of the index it tracks. A leveraged ETF will engage in transactions and purchase instruments that give rise to forms of leverage, including, among others, the use of reverse repurchase agreements and other borrowings, the investment of collateral from loans of portfolio securities, the use of when issued, delayed-delivery or forward commitment transactions or short sales. To the extent a fund invests in ETFs that achieve leveraged exposure to their underlying indexes through the use of derivative instruments, the fund will indirectly be subject to leveraging risk. As a shareholder in an ETF, the Multi-Disciplinary Income Portfolio will bear its pro rata portion of an ETF’s expenses, including advisory fees, in addition to its own expenses. The existence of extreme market volatility or potential lack of an active trading market for an ETF’s shares could result in such shares trading at a significant premium or discount to their NAV.

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No Load Class Prospectus | Kinetics Multi-Disciplinary Income Fund | Market Risk Member

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ª Management Risk: The Investment Adviser continuously evaluates the Multi-Disciplinary Income Portfolio’s holdings, purchases, and sales with a view to achieving the Multi-Disciplinary Income Fund’s investment objective. However, achievement of the stated investment objective cannot be guaranteed. The Investment Adviser’s judgment about the markets, the economy, CLOs and corporate loans may not anticipate actual market movements, economic conditions, CLOs or corporate loans securities performance, and these factors may affect the return on your investment.

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No Load Class Prospectus | Kinetics Multi-Disciplinary Income Fund | Option Transaction Risk Member

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ª Market Risk: The Multi-Disciplinary Income Fund is subject to market risks and significant fluctuations in value. If the stock market declines in value, the Multi-Disciplinary Income Portfolio is likely to decline in value and you could lose money on your investment. Natural disasters, public health emergencies (including epidemics and pandemics), geopolitical events, terrorism and other global unforeseeable events may lead to instability in world economies and markets, market volatility and may have adverse long-term effects.

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No Load Class Prospectus | Kinetics Multi-Disciplinary Income Fund | Redemption Risk Member

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ª Option Transaction Risk: Purchasing and writing put and call options are highly specialized activities and entail greater than ordinary investment risks. The successful use of options depends in part on the ability of the Investment Adviser to manage future price fluctuations and the degree of correlation between the options and securities (or currency) markets. By writing put options on equity securities, the Multi-Disciplinary Income Portfolio gives up the opportunity to benefit from potential increases in the value of the common stocks above the strike prices of the written put options, but continues to bear the risk of declines in the value of its common stock portfolio. The Multi-Disciplinary Income Portfolio will receive a premium from writing a covered call option that it retains whether or not the option is exercised. The premium received from the written options may not be sufficient to offset any losses sustained from the volatility of the underlying equity securities over time.

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No Load Class Prospectus | Kinetics Multi-Disciplinary Income Fund | Valuation Risk Member

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ª Redemption Risk: Paying redemption proceeds may require the Multi-Disciplinary Income Portfolio to dispose of or sell portfolio investments at an inopportune time to obtain the cash needed to pay redemption proceeds. This may cause the Multi-Disciplinary Income Fund to incur certain costs and to recognize gains or losses.

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No Load Class Prospectus | Kinetics Multi-Disciplinary Income Fund | Temporary Defensive Position Risk Member

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ª Valuation Risk: There is a risk that one or more of the securities in which the Multi-Disciplinary Income Portfolio invests are valued differently than the price realized upon such security’s sale. In times of market instability, valuation may be more difficult. The tiered capital structure of CLOs may also subject them to price volatility and valuation risk in times of market stress.

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No Load Class Prospectus | Kinetics Multi-Disciplinary Income Fund | Bloomberg U.S. Aggregate Bond Index (reflects no deduction for fees, expenses or taxes)

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ª Temporary Defensive Position Risk: If the Multi-Disciplinary Income Portfolio takes a temporary defensive position, it may invest all or a large portion of its assets in cash and/or cash equivalents. If the Multi-Disciplinary Income Portfolio takes a temporary defensive position, the Multi-Disciplinary Income Fund may not achieve its investment objective.

Index No Deduction for Fees, Expenses, Taxes [Text]

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rr_IndexNoDeductionForFeesExpensesTaxes

(reflects no deductions for fees, expenses or taxes)

rr_AverageAnnualReturnLabel

Bloomberg U.S. Aggregate Bond Index (reflects no deductions for fees, expenses or taxes)

rr_AverageAnnualReturnYear01

5.53%

rr_AverageAnnualReturnYear05

1.10%

rr_AverageAnnualReturnYear10

1.81%

rr_AverageAnnualReturnSinceInception

2.75%

No Load Class Prospectus | Kinetics Multi-Disciplinary Income Fund | Bloomberg U.S. Corporate High Yield Bond Index (reflects no deductions for fees, expenses or taxes)

rr_AverageAnnualReturnInceptionDate

Feb. 11, 2008

Index No Deduction for Fees, Expenses, Taxes [Text]

rr_ProspectusLineItems

rr_IndexNoDeductionForFeesExpensesTaxes

(reflects no deductions for fees, expenses or taxes)

rr_AverageAnnualReturnLabel

Bloomberg U.S. Corporate High Yield Bond Index (reflects no deductions for fees, expenses or taxes)

rr_AverageAnnualReturnYear01

13.44%

rr_AverageAnnualReturnYear05

5.37%

rr_AverageAnnualReturnYear10

4.60%

rr_AverageAnnualReturnSinceInception

6.76%

No Load Class Prospectus | Kinetics Multi-Disciplinary Income Fund | No Load Class

rr_AverageAnnualReturnInceptionDate

Feb. 11, 2008

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Redemption Fee (as a percentage of Amount Redeemed)

dei_TradingSymbol

KMDNX

rr_RedemptionFeeOverRedemption

(2.00%)

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rr_ManagementFeesOverAssets

1.00%

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rr_DistributionAndService12b1FeesOverAssets

none

rr_Component1OtherExpensesOverAssets

0.25%

rr_Component2OtherExpensesOverAssets

0.14%

Acquired Fund Fees and Expenses

rr_OtherExpensesOverAssets

0.39%

rr_AcquiredFundFeesAndExpensesOverAssets

0.24%

rr_ExpensesOverAssets

1.63%

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rr_FeeWaiverOrReimbursementOverAssets

(0.61%)

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rr_NetExpensesOverAssets

1.02%

rr_ExpenseExampleYear01

$ 129

rr_ExpenseExampleYear03

532

rr_ExpenseExampleYear05

959

rr_ExpenseExampleYear10

$ 2,151

rr_AnnualReturn2014

2.46%

rr_AnnualReturn2015

(2.17%)

rr_AnnualReturn2016

10.41%

rr_AnnualReturn2017

4.75%

rr_AnnualReturn2018

(1.00%)

rr_AnnualReturn2019

9.08%

rr_AnnualReturn2020

(1.38%)

rr_AnnualReturn2021

1.18%

rr_AnnualReturn2022

(2.30%)

rr_AnnualReturn2023

5.15%

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Return Before Taxes

rr_AverageAnnualReturnYear01

5.15%

rr_AverageAnnualReturnYear05

2.26%

rr_AverageAnnualReturnYear10

2.53%

rr_AverageAnnualReturnSinceInception

3.65%

No Load Class Prospectus | Kinetics Multi-Disciplinary Income Fund | No Load Class | After Taxes on Distributions

rr_AverageAnnualReturnInceptionDate

Feb. 11, 2008

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rr_AverageAnnualReturnLabel

Return After Taxes on Distributions

rr_AverageAnnualReturnYear01

2.94%

rr_AverageAnnualReturnYear05

0.90%

rr_AverageAnnualReturnYear10

1.02%

No Load Class Prospectus | Kinetics Multi-Disciplinary Income Fund | No Load Class | After Taxes on Distributions and Sales

rr_AverageAnnualReturnSinceInception

2.18%

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Return After Taxes on Distributions and Sale of Fund Shares(1)

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rr_AverageAnnualReturnYear01

3.02%

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rr_AverageAnnualReturnYear05

1.15%

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rr_AverageAnnualReturnYear10

1.26%

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