Filed by Star Peak Corp II pursuant to

Rule 425 under the Securities Act of 1933

and deemed filed pursuant to Rule 14a-12

under the Securities Exchange Act of 1934

Subject Company: Star Peak Corp II

Commission File No. 001-39835

A transcript from an interview on CNBC on August 19, 2021 follows:

Benson Hill CEO Matt Crisp on Yellow Pea

CNBC

The News with Shepard Smith

PARTICIPANTS

Tyler Mathisen – CNBC The News with Shepard Smith, Guest Host

Kate Rogers – CNBC reporter

Matt Crisp – CEO, Co-Founder, Benson Hill

Tyler Lorenzen – CEO, Puris

Tyler Mathisen

Chipotle is rolling out a new plant-based chorizo. The company says it's testing the vegan option in Indianapolis and Denver right now. It’s Chipotle’s first new plant-based protein since it launched tofu-based sofritas seven years ago. Burger King, Subway, White Castle, Carl's Jr. and others have added meatless options to their menus. Kate Rogers now on how this spike in demand has pea protein makers scrambling to keep up.

Kate Rogers

These aren't your grandmother's peas. As plant-based diets become more mainstream, companies that make pea protein are finding themselves in high demand. For plant-based eaters, pea protein replaces the animal protein found in meat products. Benson Hill, an agri-tech company in Missouri developing yellow peas and soy beans that taste better and have higher protein levels. It currently works with Nestle, General Mills and Blue Buffalo to supply ingredients for pet and human foods. It will become a public company via SPAC merger later this quarter.

Matt Crisp

We've got to go and look at other protein sources and other crop choices and innovate on those using the same science and technologically driven approaches that we've done for corn historically and bring that innovation to bear for properties that consumers really want.

Kate Rogers

Pea protein giant Puris is based in Minneapolis and set to open a new facility next month to meet exploding demand, with an intention of doubling its pea protein business. The company supplies its protein for alternative meat and dairy products and for names like Beyond Meat and Ritual. It’s made in the US making it a sustainable option for consumers and companies.

Tyler Lorenzen

Peas, in general, inherently are very climate resilient. The amount of water, the amount they need to grow is very little. And what they give back is quite abundant.

Kate Rogers

Analysts say the alt-meat market could hit $140 billion dollars over the next decade and pea protein is a key part of that growth as suppliers like the ones you just saw will need to match that growing demand. Tyler.

Tyler Mathisen

Thank you very much, Kate Rogers.

****

Additional Information
This communication is being made in respect of a proposed merger (the “Merger”) and related transactions (the “proposed transactions”) involving Star Peak Corp. II (“Star Peak”) and Benson Hill, Inc. (“Benson Hill”). The proposed transactions will be submitted to stockholders of Star Peak for their consideration and approval at a special meeting of stockholders. In addition, Benson Hill will solicit written consents from its stockholders for approval of the proposed transactions. In connection with the proposed transactions, Star Peak has filed a Registration Statement on Form S-4 (the “Registration Statement”) with the Securities and Exchange Commission (the “SEC”), which includes a proxy statement to be distributed to Star Peak stockholders in connection with Star Peak’s solicitation for proxies for the vote by Star Peak’s stockholders in connection with the proposed transactions and other matters as described in such Registration Statements and a prospectus relating to the offer of the securities to be issued to Benson Hill’s stockholders in connection with the completion of the Merger. After the Registration Statement has been declared effective, Star Peak will mail a definitive proxy statement / prospectus and other relevant documents to its stockholders as of the record date established for voting on the proposed transactions. Investors, Star Peak’s stockholders and other interested parties are advised to read the preliminary proxy statement, and any amendments thereto, and, when available, the definitive proxy statement in connection with Star Peak’s solicitation of proxies for its special meeting of stockholders to be held to approve the proposed transaction because the proxy statement / prospectus will contain important information about the proposed transaction and the parties to the proposed transaction. Stockholders will also be able to obtain copies of the proxy statement / prospectus, without charge, once available, at the SEC’s website at www.sec.gov or by directing a request to: Star Peak Corp II, 1603 Orrington Avenue, 13th Floor, Evanston, Illinois 60201.

No Offer or Solicitation
This communication does not constitute an offer to sell or the solicitation of an offer to buy any securities, or a solicitation of any vote or approval, nor shall there be any sale of securities in any jurisdiction in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such jurisdiction. No offering of securities shall be made except by means of a prospectus meeting the requirements of Section 10 of the Securities Act of 1933, as amended.

Participants in the Solicitation
Star Peak and Benson Hill and their respective directors, executive officers, other members of management, and employees, under SEC rules, may be deemed to be participants in the solicitation of proxies of Star Peak’s stockholders in connection with the proposed transaction. Information regarding the persons who may, under SEC rules, be deemed participants in the solicitation of proxies in connection with the proposed transaction, including a description of their direct or indirect interests, by security holdings or otherwise, is set forth in the Registration Statement that has been filed with the SEC by Star Peak, which includes the proxy statement / prospectus for the proposed transaction. Information regarding the directors and executive officers of Star Peak is contained in Star Peak’s filings with the SEC, and such information is also in the Registration Statement that has been filed with the SEC by Star Peak, which includes the proxy statement / prospectus for the proposed transaction.

Use of Non-GAAP Financial Measures

In this press release, the Company includes Adjusted EBITDA, which is a non-GAAP performance measure that the Company uses to supplement its results presented in accordance with U.S. GAAP. As required by the rules of the SEC, the Company has provided herein a reconciliation of the non-GAAP financial measure contained in this press release to the most directly comparable measure under GAAP. The Company’s management believes Adjusted EBITDA is useful in evaluating its operating performance and is a similar measure reported by publicly-listed U.S. competitors, and regularly used by securities analysts, institutional investors, and other interested parties in analyzing operating performance and prospects. By providing this non-GAAP measure, the Company’s management intends to provide investors with a meaningful, consistent comparison of the Company’s profitability for the periods presented. Adjusted EBITDA is not intended to be a substitute for any U.S. GAAP financial measure and, as calculated, may not be comparable to other similarly titled measures of performance of other companies in other industries or within the same industry.

The Company defines and calculates Adjusted EBITDA as earnings from continuing operations before net interest expense, income tax provision and depreciation and amortization, further adjusted to exclude stock-based compensation, and the impact of significant non-recurring items.

Forward-Looking Statements
Certain statements in this communication may be considered “forward-looking statements” within the meaning of the “safe harbor” provisions of the United States Private Securities Litigation Reform Act of 1995. Forward-looking statements generally relate to future events or Star Peak’s or Benson Hill’s future financial or operating performance. These forward-looking statements include, but are not limited to, statements regarding estimates and forecasts of other financial and performance metrics and projections of market opportunity. In some cases, you can identify forward-looking statements by terminology such as “may,” “should,” “expect,” “intend,” “will,” “estimate,” “anticipate,” “believe,” “predict,” or the negatives of these terms or variations of them or similar terminology. Such forward-looking statements are subject to risks, uncertainties, and other factors which could cause actual results to differ materially from those expressed or implied by such forward-looking statements. These forward-looking statements are based upon estimates and assumptions that, while considered reasonable by Star Peak and its management, and Benson Hill and its management, as the case may be, are inherently uncertain factors that may cause actual results to differ materially from current expectations include, but are not limited to: 1) the occurrence of any event, change or other circumstances that could give rise to the termination of the definitive merger agreement with respect to the business combination; 2) the outcome of any legal proceedings that may be instituted against Star Peak, the combined company or others following the announcement of the business combination and any definitive agreements with respect thereto; 3) the inability to complete the business combination due to the failure to obtain approval of the stockholders of Star Peak, to obtain financing to complete the business combination or to satisfy other conditions to closing; 4) changes to the proposed structure of the business combination that may be required or appropriate as a result of applicable laws or regulations or as a condition to obtaining regulatory approval of the business combination; 5) the ability to meet the New York Stock Exchange’s listing standards following the consummation of the business combination; 6) the risk that the business combination disrupts current plans and operations of Benson Hill as a result of the announcement and consummation of the business combination; 7) the ability to recognize the anticipated benefits of the business combination, which may be affected by, among other things, competition, the ability of the combined company to grow and manage growth profitably, maintain relationships with customers and suppliers and retain its management and key employees; 8) costs related to the business combination; 9) changes in applicable laws or regulations; 10) the possibility that Benson Hill or the combined company may be adversely affected by other economic, business and/or competitive factors; 11) Benson Hill’s estimates of its financial performance; 12) the impact of the COVID-19 pandemic and its effect on business and financial conditions; and 13) other risks and uncertainties set forth in the sections entitled “Risk Factors” and “Cautionary Note Regarding Forward-Looking Statements” in Star Peak’s Annual Report on Form 10-K for the year ended December 31, 2020, filed with the SEC on March 31, 2021, in the Registration Statement containing the proxy statement / prospectus relating to the proposed business combination, and other documents filed or to be filed with the SEC by Star Peak. Nothing in this communication should be regarded as a representation by any person that the forward-looking statements set forth herein will be achieved or that any of the contemplated results of such forward looking statements will be achieved. There may be additional risks that Star Peak and Benson Hill presently do not know or that Star Peak and Benson Hill currently believe are immaterial that could also cause actual results to differ from those contained in the forward-looking statements. You should not place undue reliance on forward-looking statements, which speak only as of the date they are made. Neither Star Peak nor Benson Hill undertakes any duty to update these forward-looking statements, except as otherwise required by law.