10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 10-Q

☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended September 30, 2023

OR

☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from to

Commission File Number: 001-38624

Vaccinex, Inc.

(Exact name of registrant as specified in its charter)

Delaware	16-1603202
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)
1895 Mount Hope Avenue Rochester, New York	14620
(Address of principal executive offices)	(Zip Code)

Registrant’s telephone number, including area code: (585) 271-2700

Securities registered pursuant to Section 12(b) of the Securities Exchange Act of 1934:

Title of each class	Trading Symbol(s)	Name of each exchange on which registered
Common Stock, $0.0001 par value	VCNX	Nasdaq Capital Market

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes ☒ No ☐

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). Yes ☒No ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

Large accelerated filer	☐	Accelerated filer	☐
Non-accelerated filer	☒	Smaller reporting company	☒
Emerging growth company	☒

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes ☐ No ☒

As of November 8, 2023, the registrant had 12,494,275 shares of common stock, $0.0001 par value per share, outstanding.

VACCINEX, INC.

FORM 10-Q

TABLE OF CONTENTS

		Page
	PART I – FINANCIAL INFORMATION
Item 1.	Financial Statements	3
	Condensed Balance Sheets (Unaudited)	3
	Condensed Statements of Operations and Comprehensive Loss (Unaudited)	4
	Condensed Statements of Stockholders’ Equity (Deficit) (Unaudited)	5
	Condensed Statements of Cash Flows (Unaudited)	6
	Notes to Condensed Financial Statements (Unaudited)	7
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	17
Item 3.	Quantitative and Qualitative Disclosures About Market Risk	29
Item 4.	Controls and Procedures	29
	PART II – OTHER INFORMATION
Item 1A.	Risk Factors	30
Item 6.	Exhibits	33
	Signatures	34

2

PART I - FINANCIAL INFORMATION

Item 1. Financial Statements

VACCINEX, INC.

Condensed Balance Sheets (Unaudited)

(in thousands, except share and per share data)

	As of September 30, 2023			As of December 31, 2022
ASSETS
Current assets:
Cash and cash equivalents	$	127		$	6,391
Accounts receivable		933			175
Prepaid expenses and other current assets		1,146			912
Total current assets		2,206			7,478
Property and equipment, net		164			189
Operating lease right-of-use asset		188			310
TOTAL ASSETS	$	2,558		$	7,977
LIABILITIES AND STOCKHOLDERS’ EQUITY
Current liabilities:
Accounts payable	$	4,225		$	1,518
Accrued expenses		1,895			781
Current portion of long-term debt		75			74
Operating lease liability		167			164
Total current liabilities		6,362			2,537
Long-term debt		44			101
Operating lease liability, net of current portion		21			146
TOTAL LIABILITIES		6,427			2,784
Commitments and contingencies (Note 6)
Stockholders’ equity (deficit):
Common stock, par value of $0.0001 per share; 100,000,000 shares authorized    as of September 30, 2023, and December 31, 2022; 4,858,530 and 3,325,441    shares issued as of September 30, 2023 and December 31, 2022, respectively;    4,858,473 and 3,325,384 shares outstanding as of September 30, 2023    and December 31, 2022, respectively		-			-
Additional paid-in capital		332,752			324,880
Treasury stock, at cost; 57 shares of common stock as of September 30, 2023 and December 31, 2022, respectively		(11	)		(11	)
Accumulated deficit		(336,610	)		(319,676	)
TOTAL STOCKHOLDERS’ EQUITY/(DEFICIT)		(3,869	)		5,193
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY/(DEFICIT)	$	2,558		$	7,977

The accompanying notes are an integral part of these condensed financial statements.

3

VACCINEX, INC.

Condensed Statements of Operations and Comprehensive Loss (Unaudited)

(in thousands, except share and per share data)

	Three Months Ended September 30,						Nine Months Ended September 30,
	2023			2022			2023			2022
Revenue	$	20		$	50		$	570		$	50
Costs and expenses:
Research and development		4,355			3,429			13,217			10,238
General and administrative		1,499			1,413			5,250			4,599
Total costs and expenses		5,854			4,842			18,467			14,837
Loss from operations		(5,834	)		(4,792	)		(17,897	)		(14,787	)
Interest expense		-			(1	)		(1	)		(2	)
Other income (expense), net		922			34			964			52
Loss before provision for income taxes		(4,912	)		(4,759	)		(16,934	)		(14,737	)
Provision for income taxes		-			-			-			-
Net loss attributable to Vaccinex, Inc. common stockholders	$	(4,912	)	$	(4,759	)	$	(16,934	)	$	(14,737	)
Comprehensive loss	$	(4,912	)	$	(4,759	)	$	(16,934	)	$	(14,737	)
Net loss per share attributable to Vaccinex, Inc. common    stockholders, basic and diluted	$	(1.09	)	$	(1.67	)	$	(4.28	)	$	(5.34	)
Weighted-average shares used in computing net loss per share    attributable to Vaccinex, Inc. common stockholders, basic and    diluted		4,506,834			2,844,270			3,953,431			2,757,475

The accompanying notes are an integral part of these condensed financial statements.

4

VACCINEX, INC.

Condensed Statements of Stockholders’ Equity (Deficit) (Unaudited)

(in thousands, except share data)

	Common Stock						Treasury Stock
	Shares		Amount		Additional Paid-in Capital		Common Stock Shares		Amount			Accumulated Deficit			Total Stockholders’ Equity
Balance as of January 1, 2022		2,053,464	$	-	$	307,284		57	$	(11	)	$	(299,861	)	$	7,412
Issuance of Common Shares		790,863		-		13,230		-		-			-			13,230
Stock-based compensation		-		-		141		-		-			-			141
Net loss		-		-		-		-		-			(4,595	)		(4,595	)
Balance as of March 31, 2022		2,844,327		-		320,655		57		(11	)		(304,456	)		16,188
Stock-based compensation		-		-		138		-		-			-			138
Net loss		-		-		-		-		-			(5,383	)		(5,383	)
Balance as of June 30, 2022		2,844,327		-		320,793		57		(11	)		(309,839	)		10,943
Stock-based compensation		-		-		134		-		-			-			134
Net loss		-		-		-		-		-			(4,759	)		(4,759	)
Balance as of September 30, 2022		2,844,327	$	-	$	320,927		57	$	(11	)	$	(314,598	)	$	6,318
	Common Stock						Treasury Stock
	Shares		Amount		Additional Paid-in Capital		Common Stock Shares		Amount			Accumulated Deficit			Total Stockholders’ Equity/(Deficit)
Balance as of January 1, 2023		3,325,441	$	-	$	324,880		57	$	(11	)	$	(319,676	)	$	5,193
Issuance of Common Shares		331,707		-		2,040		-		-			-			2,040
Stock-based compensation		-		-		129		-		-			-			129
Net loss		-		-		-		-		-			(4,962	)		(4,962	)
Balance as of March 31, 2023		3,657,148		-		327,049		57		(11	)		(324,638	)		2,400
Issuance of Common Shares		720,802		-		4,111		-		-			-			4,111
Stock-based compensation		-		-		126		-		-			-			126
Net loss		-		-		-		-		-			(7,060	)		(7,060	)
Balance as of June 30, 2023		4,377,950		-		331,286		57		(11	)		(331,698	)		(423	)
Issuance of Common Shares		480,580		-		1,351		-		-			-			1,351
Stock-based compensation		-		-		115		-		-			-			115
Net loss		-		-		-		-		-			(4,912	)		(4,912	)
Balance as of September 30, 2023		4,858,530	$	-	$	332,752		57	$	(11	)	$	(336,610	)	$	(3,869	)

The accompanying notes are an integral part of these condensed financial statements.

5

VACCINEX, INC.

Condensed Statements of Cash Flows (Unaudited)

(in thousands)

	Nine Months Ended September 30,
	2023			2022
CASH FLOWS FROM OPERATING ACTIVITIES:
Net loss	$	(16,934	)	$	(14,737	)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation		92			162
Stock-based compensation		370			413
Changes in operating assets and liabilities:
Accounts receivable		(758	)		(50	)
Prepaid expenses and other current assets		17			27
Accounts payable		2,707			(567	)
Accrued expenses		864			277
Net cash used in operating activities		(13,642	)		(14,475	)
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchase of property and equipment		(67	)		(101	)
Net cash used in investing activities		(67	)		(101	)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from issuance of common stock		1,268			3,519
Payments of long-term debt		(57	)		(56	)
Proceeds from private offering of common stock		6,234			9,710
Net cash provided by financing activities		7,445			13,173
NET (DECREASE)/INCREASE IN CASH AND CASH EQUIVALENTS		(6,264	)		(1,403	)
CASH AND CASH EQUIVALENTS–Beginning of period		6,391			8,589
CASH AND CASH EQUIVALENTS–End of period	$	127		$	7,186

The accompanying notes are an integral part of these condensed financial statements.

6

VACCINEX, INC.

Notes to Condensed Financial Statements (Unaudited)

Note 1. COMPANY AND NATURE OF BUSINESS

Vaccinex, Inc. (the “Company”) was incorporated in Delaware in April 2001 and is headquartered in Rochester, New York. The Company is a clinical-stage biotechnology company engaged in the discovery and development of targeted biotherapeutics to treat serious diseases and conditions with unmet medical needs, including cancer, neurodegenerative diseases, and autoimmune disorders. Since its inception, the Company has devoted substantially all of its efforts toward product research, manufacturing and clinical development, and raising capital.

The Company is subject to a number of risks and uncertainties common to other early-stage biotechnology companies including, but not limited to, dependency on the successful development and commercialization of its product candidates, rapid technological change and competition, dependence on key personnel and collaborative partners, uncertainty of protection of proprietary technology and patents, clinical trial uncertainty, fluctuation in operating results and financial performance, the need to obtain additional funding, compliance with governmental regulations, technological and medical risks, management of growth and effectiveness of marketing by the Company. If the Company does not successfully commercialize or partner any of its product candidates, it will be unable to generate product revenue or achieve profitability.

Going Concern

These condensed financial statements have been prepared in accordance with generally accepted accounting principles applicable to a going concern, which contemplates the realization of assets and the satisfaction of liabilities in the normal course of business.

The Company has incurred significant losses and negative cash flows from operations since inception and expects to incur additional losses until such a time it can generate significant revenue from the commercialization of its product candidates. The Company had negative cash flow from operations of $13.6 million for the nine months ended September 30, 2023, and an accumulated deficit of $336.6 million as of September 30, 2023. Given the Company’s projected operating requirements and its existing cash and cash equivalents, the Company is projecting insufficient liquidity to sustain its operations through one year following the date that the condensed financial statements are issued. These conditions and events raise substantial doubt about the Company’s ability to continue as a going concern.

In response to these conditions, management is currently evaluating different strategies to obtain the required funding of future operations. Financing strategies may include, but are not limited to, the public or private sale of equity, debt financing or funds from other capital sources, such as government funding, collaborations, strategic alliances, divestment of non-core assets, or licensing arrangements with third parties. There can be no assurances that the Company will be able to secure additional financing, or if available, that it will be sufficient to meet its needs or on favorable terms. Because management’s plans have not yet been finalized and are not within the Company’s control, the implementation of such plans cannot be considered probable. As a result, the Company has concluded that management’s plans do not alleviate substantial doubt about the Company’s ability to continue as a going concern.

The condensed financial statements do not include any adjustments relating to the recoverability and classification of recorded asset amounts or the amounts and classification of liabilities that might result from the outcome of this uncertainty.

7

Note 2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Basis of Presentation and Consolidation

The accompanying unaudited condensed financial statements reflect the accounts and operations of the Company and have been prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) for interim financial information (Accounting Standards Codification (“ASC”) 270, Interim Reporting) and with the instructions to Form 10-Q and Article 8 of Regulation S-X. Accordingly, these financial statements do not include all of the information necessary for a full presentation of financial position, results of operations, and cash flows in conformity with GAAP. In the opinion of management, the condensed financial statements reflect all adjustments (consisting of normal recurring adjustments) considered necessary for a fair presentation of the results of the Company for the periods presented.

These condensed financial statements should be read in conjunction with the Company’s audited financial statements and related notes included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2022, filed with the SEC on March 31, 2023.

Common Stock Reverse Split

On September 25, 2023, the Company effected a 1-for-15 reverse stock split of its issued shares of common stock (the "Reverse Stock Split"). All per share amounts, common shares outstanding and stock-based compensation amounts for all periods presented have been retroactively adjusted to reflect the Reverse Stock Split. The shares of common stock retain a par value of $0.0001 per share.

Use of Estimates

These condensed financial statements have been prepared in conformity with U.S. GAAP. The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities as of the date of the condensed financial statements and the reported amount of expenses during the reporting period. Such management estimates include those relating to assumptions used in the valuation of stock option awards, and valuation allowances against deferred income tax assets. Actual results could differ from those estimates.

Concentration of Credit Risk, Other Risks and Uncertainties

The Company is subject to a number of risks, including, but not limited to, the lack of available capital; the possible delisting of our common stock from Nasdaq, possible failure of preclinical testing or clinical trials; inability to obtain regulatory approval of product candidates; competitors developing new technological innovations; potential interruptions in the manufacturing and commercial supply operations; unsuccessful commercialization strategy and launch plans for its proprietary drug candidates; risks inherent in litigation, including purported class actions; market acceptance of the Company’s products; and protection of proprietary technology.

Financial instruments that potentially subject the Company to concentrations of credit risk consist primarily of cash and cash equivalents. Cash equivalents are deposited in interest-bearing money market accounts. Although the Company deposits its cash with multiple financial institutions, cash balances may occasionally be in excess of the amounts insured by the Federal Deposit Insurance Corporation. Management believes the financial risk associated with these balances is minimal and has not experienced any losses to date.

The Company has historically raised capital in transactions with investors that include members of its board of directors and entities controlled by certain board members. As such, the Company's directors, directly and indirectly, control a significant ownership percentage of the Company. The Company can provide no assurances that future financing will be available in sufficient amounts or on terms acceptable to it or that its directors or entities controlled by certain board members will be willing or able to participate in future capital raises by the Company.

8

The Company depends on third-party manufacturers for the manufacture of drug substances and drug product for clinical trials. The Company also relies on certain third parties for its supply chain. Disputes with these third- party manufacturers or shortages in goods or services from third-party suppliers could delay the manufacturing of the Company’s product candidates and adversely impact its results of operations.

Employee Retention Credit

The Coronavirus Aid, Relief, and Economic Security Act (the “CARES Act”) provided refundable employee retention credits, which could be used to offset payroll tax liabilities. Under the provisions of the extension of the CARES Act, the Company qualified for the employee retention credit for the last three quarters of 2020, and first three quarters of 2021, and the Company applied for the credit in September 2023. As there is no authoritative guidance under U.S. GAAP for accounting for grants to for-profit business entities, the Company accounted for the grant by applying Accounting Standards Codification (“ASC”) 450, Contingencies. The Company recognized an employee retention credit receivable of $0.9 million as of September 30, 2023 in accounts receivable on the condensed balance sheet. The Company recognized the employee retention credit during the three and nine months ended September 30, 2023 as a component of other income (expense), net on the condensed statement of operations and comprehensive income (loss).

Recently Issued Accounting Pronouncements

In the normal course of business, the Company evaluates all new Accounting Standards Updates ("ASU") and other accounting pronouncements issued by the Financial Accounting Standards Board ("FASB"), Securities and Exchange Commission ("SEC"), or other authoritative accounting bodies to determine the potential impact they may have on its condensed financial statements. The Company does not expect any of the recently issued accounting pronouncements, which have not already been adopted, to have a material impact on its condensed financial statements.

Note 3. BALANCE SHEET COMPONENTS

Property and Equipment

Property and equipment consist of the following (in thousands):

	As of September 30, 2023			As of December 31, 2022
Leasehold improvements	$	3,277		$	3,259
Research equipment		3,351			3,515
Furniture and fixtures		350			350
Computer equipment		250			321
Property and equipment, gross		7,228			7,445
Less: accumulated depreciation and amortization		(7,064	)		(7,256	)
Property and equipment, net	$	164		$	189

Depreciation expense related to property and equipment was $31,000 and $92,500 for the three and nine months ended September 30, 2023 and $67,000 and $162,000 for the three and nine months ended September 30, 2022, respectively.

9

Accrued Expenses

Accrued expenses consist of the following (in thousands):

	As of September 30, 2023		As of December 31, 2022
Accrued clinical trial cost	$	1,220	$	335
Accrued payroll and related benefits		287		308
Accrued consulting and legal		382		127
Accrued other		6		11
Accrued expenses	$	1,895	$	781

Note 4. FAIR VALUE MEASUREMENTS OF FINANCIAL MEASUREMENTS

Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis

Assets and liabilities recorded at fair value on a nonrecurring basis in the condensed balance sheets are categorized based upon the level of judgment associated with the inputs used to measure their fair values. Financial instruments consist of cash, accounts receivable, accounts payable, accrued liabilities, and long-term debt. Cash, accounts receivable, accounts payable, accrued liabilities, and debt, are stated at their carrying value, which approximates fair value due to the short time to the expected receipt or payment date of such amounts.

Assets and Liabilities Measured at Fair Value on a Recurring Basis

Fair value measurement standards also apply to certain financial assets and liabilities that are measured at fair value on a recurring basis (each reporting period). For the Company, these financial assets and liabilities include its cash equivalents deposited in money market funds. The Company does not have any nonfinancial assets or liabilities that are measured at fair value on a recurring basis.

The assets’ or liabilities’ fair value measurement level within the fair value hierarchy is based on the lowest level of any input that is significant to the fair value measurement.

The following table sets forth the fair value of the Company’s financial assets by level within the fair value hierarchy (in thousands):

	As of September 30, 2023
	Fair Value		Level 1		Level 2		Level 3
Financial Assets:
Cash equivalents:
Money market fund	$	-	$	-	$	-	$	-
Total Financial Assets	$	-	$	-	$	-	$	-

	As of December 31, 2022
	Fair Value		Level 1		Level 2		Level 3
Financial Assets:
Cash equivalents:
Money market fund	$	3,975	$	3,975	$	-	$	-
Total Financial Assets	$	3,975	$	3,975	$	-	$	-

The Company did not transfer any assets measured at fair value on a recurring basis to or from Level 1 and Level 2 during either of the nine months ended September 30, 2023 and 2022.

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Note 5. COLLABORATION AGREEMENTS

Surface Oncology, Inc.

In November 2017, the Company entered into a research collaboration and license option agreement with Surface Oncology, Inc. (“Surface”) to identify and select antibodies against two target antigens, using the Company’s proprietary technology as described in the agreement. Under the agreement, Surface may purchase exclusive options, exercisable by providing a written notice to the Company, to obtain (i) an exclusive product license to make, use, sell and import products incorporating antibodies targeting the first antigen and (ii) an exclusive research tool license to use antibodies targeting the second antigen to perform research. Surface purchased the first option and exercised the second option and we entered into an exclusive research tool license agreement with Surface in the third quarter of 2019.

Under the research collaboration and license option agreement, Surface paid an upfront technology access fee of $250,000 and makes milestone payments upon completion of each of four designated milestones for the first target antigen specified in the agreement. For the second target antigen, Surface is obligated to make payments to the Company based on time incurred by the Company in the conduct of the work plan described in the agreement. Surface is required to reimburse the Company for expenses incurred (i) in the conduct of the work plan as detailed in the research funding budget and (ii) for patent filings and prosecution of the Company’s program intellectual property as described in the agreement. The exercise of each option would also entail a license fee and annual maintenance fees, and in the case of the product license, royalties and additional milestone payments. This agreement will expire upon the latest of the expiration of both research programs and all evaluation and testing periods. During the nine months ended September 30, 2023, the Company recorded $500,000 of revenue for achievement of a milestone event.

Note 6. COMMITMENTS AND CONTINGENCIES

Nasdaq Deficiency Notices

On October 10, 2022, the Company received a letter from the Listing Qualifications staff of The Nasdaq Stock Market ("Nasdaq") notifying the Company that it is no longer in compliance with the minimum bid price requirement for continued listing on the Nasdaq Capital Market. Nasdaq Listing Rule 5550(a)(2) requires listed companies to maintain a minimum bid price of $1.00 per share. In accordance with Nasdaq Listing Rule 5810(c)(3)(A), the Company received a second 180-day compliance period, or until October 9, 2023, to regain compliance with the minimum bid price requirement. The Company did not regain compliance by October 9, 2023 and received a notice from Nasdaq that its stock is subject to delisting. The Company appealed the delisting notice and has received an extension until March 4, 2024 to regain compliance with the minimum bid price requirement, subject to fulfilling its commitments to regain compliance by such date. There can be no assurance that the Company will be able to regain compliance with the Nasdaq minimum bid price requirements or that its common stock will continue to be listed on Nasdaq.

On May 25, 2023, the Company received a letter from the Listing Qualifications staff of Nasdaq notifying the Company that it no longer complies with the requirement under Nasdaq Listing Rule 5550(b)(1) to maintain a minimum of $2.5 million in stockholders’ equity for continued listing on the Nasdaq Capital Market (the “Equity Standard”) or the alternative requirements of having a market value of listed securities of $35.0 million or net income from continuing operations of $500,000 in the most recently completed fiscal year or two of the last three most recently completed fiscal years (the “Alternative Standards”). The notification letter noted that the Company’s Form 10-Q for the period ended March 31, 2023 disclosed stockholders’ equity of $2.4 million as of March 31, 2023 and that, as of May 24, 2023, the Company did not meet the Alternative Standards. The notification letter had no immediate effect on the Company’s listing on the Nasdaq Capital Market. Nasdaq provided the Company 45 calendar days from the date of the notification letter, or until July 9, 2023, to submit a plan to regain compliance with the Equity Standard (the “Compliance Plan”). A plan to regain compliance was submitted on July 7, 2023 and was accepted on July 18, 2023, and therefore the Company was granted an extension of up to 180 calendar days from the date of the notification letter, or until November 21, 2023, to regain compliance with the Equity Standard. As of September 30, 2023, we had a stockholder's deficit of $3.9 million and had not regained compliance with the Equity Standard.

11

On October 3, 2023 the Company’s raised aggregate gross proceeds of $9.6 million in a public offering of common stock and common stock equivalents, with accompanying warrants, discussed in Note 15 below. After conducting the public offering we received a letter from Nasdaq indicating we were in compliance with Nasdaq’s Equity Standard. We anticipate we will be in compliance with the Equity Standard for the period ended December 31, 2023. However, there can be no assurance that the Company will be able to regain or maintain compliance with the Equity Standard.

Other Contingencies

The Company is subject to claims and assessments from time to time in the ordinary course of business. The Company records a provision for a liability when it believes that it is both probable that a liability has been incurred and the amount can be reasonably estimated. Significant judgment is required to determine both probability and the estimated amount.

In the normal course of business, the Company may become involved in legal proceedings. The Company will accrue a liability for such matters when it is probable that a liability has been incurred and the amount can be reasonably estimated. When only a range of possible loss can be established, the most probable amount in the range is accrued. If no amount within this range is a better estimate than any other amount within the range, the minimum amount in the range is accrued. The accrual for a litigation loss contingency might include, for example, estimates of potential damages, outside legal fees and other directly related costs expected to be incurred. As of September 30, 2023 and December 31, 2022 the Company was not involved in any material legal proceedings.

Note 7. LEASES

The Company leases its facilities from 1895 Management, Ltd., a New York corporation controlled by an entity affiliated with a director of the Company, under non-cancellable operating leases. Following entry into a lease extension agreement in August 2022, the lease agreement requires monthly rental payments of $15,048 through October 31, 2024. The Company is responsible for all maintenance, utilities, insurance and taxes related to the facility. The Company has elected the practical expedient on not separating lease components from non-lease components.

The Company accounts for its leases under ASC 842, Leases. Leases with an initial term of 12 months or less are not recorded on the condensed balance sheet. The Company determines if an arrangement is a lease at inception. Right-of-use assets represent the Company’s right to use an underlying asset for the lease term and lease liabilities represent the Company’s obligation to make lease payments arising from the lease. Operating lease right-of-use assets and lease liabilities are recognized based on the present value of lease payments over the lease term. The leases do not provide an implicit rate so in determining the present value of lease payments, the Company its incremental borrowing rate for the applicable lease, which was 7.0%. The Company recognizes lease expense on a straight-line basis over the remaining lease term.

As of September 30, 2023, the future minimum payments for the operating leases total $195,626, less imputed interest of $7,760, for an operating lease liability of $187,866 as of September 30, 2023. For the nine months ended September 30, 2023, cash paid for amounts included in the measurement of lease liabilities was $135,434.

Lease expense incurred under the operating lease for the three month periods ended September 30, 2023 and 2022 was $45,144 and $44,000 respectively, and $135,433 and $131,000 for the nine month periods ended September 30, 2023 and 2022, respectively. Lease expense is a component of general and administrative expense.

Note 8. LONG-TERM DEBT

On May 8, 2020, the Company received a loan under the Small Business Administration's Paycheck Protection Program (the "PPP Loan") in the amount of $1,133,600. The PPP Loan originally matured on May 8, 2022, with no principal payments required prior to the maturity date, and bearing interest at an annual rate of 1.0%, with interest payments commencing on November 8, 2020, less the amount of any potential forgiveness. On November 8, 2021, the Company was awarded loan forgiveness of $876,171 and the remaining balance of the loan was refinanced. The loan has a maturity date of May 8, 2025, bears interest of 1%, and is being repaid in monthly

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payments of $6,334. The Company has recorded interest expense of $336 and $1,141 for the three and nine month periods ended September 30, 2023 and $523 and $1,764 for the three and nine month periods ended September 30, 2022, respectively on its condensed statements of operations and comprehensive loss.

Note 9. COMMON STOCK RESERVED FOR ISSUANCE

Common stock has been reserved for the following potential future issuance:

	As of September 30, 2023		As of December 31, 2022
Shares underlying outstanding stock options		205,887		118,795
Shares available for future stock option grants		4,925		25,521
Total shares of common stock reserved		210,812		144,316

Note 10. STOCK-BASED COMPENSATION

2011 Employee Equity Plan

In connection with the adoption of the Company’s 2018 Omnibus Incentive Plan (the “2018 Plan”) in August 2018, the Company ceased granting stock options under the Company’s 2011 Employee Equity Plan (the “2011 Plan”). However, the 2011 Plan will continue to govern the terms and conditions of the outstanding stock options previously granted thereunder. Any shares of stock related to awards outstanding under the 2011 Plan that terminate by expiration, forfeiture, cancellation, or otherwise without the issuance of such shares will become available for grant under the 2018 Plan. Stock options granted under the 2011 Plan expire in five or ten years from the date of grant.

2018 Omnibus Incentive Plan

In August 2018, the Company’s board of directors adopted, and its stockholders approved, the 2018 Plan, which allows for the granting of stock, stock options, and stock appreciation rights awards to employees, advisors and consultants. Stock options granted under the 2018 Plan may be either incentive stock options or non-statutory stock options. Incentive stock options may be granted to employees, advisors and consultants at exercise prices of no less than the fair value of the common stock on the grant date. If at the time of grant, the optionee owns stock representing more than 10% of the voting power of all classes of stock of the Company, the exercise price must be at least 110% of the fair value of the common stock on the grant date as determined by the board of directors. Non-statutory stock options may be granted to employees, advisors and consultants at exercise prices of less than the fair market value of a share of common stock on the date the non-statutory stock option is granted but shall under no circumstances be less than adequate consideration as determined by the board of directors for such a share. The vesting period of stock option grants is determined by the board of directors, ranging from zero to eight years. Stock options granted under the 2018 Plan expire in five or ten years from the date of grant.

The Company initially reserved 28,333 shares of common stock for issuance, subject to certain adjustments, pursuant to awards under the 2018 Plan. Any shares of common stock related to awards outstanding under the 2011 Plan as of the effective date of the 2018 Plan, which thereafter terminate by expiration, forfeiture, cancellation or otherwise without the issuance of such shares, will be added to, and included in, the number of shares of common stock available for grant under the 2018 Plan. In addition, effective January 1, 2020 and continuing until the expiration of the 2018 Plan, the number of shares of common stock available for issuance under the 2018 Plan will automatically increase annually by 2% of the total number of issued and outstanding shares of the Company’s common stock as of December 31 of the preceding year or such lesser number as the Company’s board of directors may decide, which may be zero. Accordingly, on January 1, 2023, 66,508 additional shares of common stock became available for issuance under the 2018 Plan.

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A summary of the Company’s stock option activity and related information is as follows:

	Stock Options			Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Life (Years)		Aggregate Intrinsic Value (in thousands)
Balance as of January 1, 2023		118,795		$	59.68		7.1	$	4
Granted		91,689			6.06
Exercised		-			-			$	-
Forfeited		(211	)		90.71
Expired		(4,386	)		223.60
Balance as of September 30, 2023		205,887		$	32.29		7.9	$	-
Exercisable as of September 30, 2023		95,956		$	56.76		6.4	$	-

The weighted-average grant date fair value of stock options granted to employees and directors for the nine months ended September 30, 2023 and 2022 was $4.15 per share and $11.94 per share, respectively. The aggregate grant date fair value of stock options that vested during the nine months ended September 30, 2023 and 2022 was $513,718 and $604,626, respectively.

The intrinsic value of stock options vested and exercisable and expected to vest and become exercisable is calculated based on the difference between the exercise price and the fair value of the Company’s common stock as of September 30, 2023 and December 31, 2022. The intrinsic value of exercised stock options is the difference between the fair value of the underlying common stock and the exercise price as of the exercise date.

As of September 30, 2023 and December 31, 2022, total unrecognized compensation cost related to stock options granted to employees was $572,490 and $561,198, respectively, which is expected to be recognized over a weighted-average period of 2.2 and 2.1 years, respectively.

The grant date fair value of employee stock options was estimated using a Black-Scholes option-pricing model with the following weighted-average assumptions:

	Nine Months Ended September 30,
	2023			2022
Expected term (in years)		6.0			6.0
Expected volatility		75	%		75	%
Risk-free interest rate		3.7	%		2.3	%
Expected dividend yield		-	%		-	%

Total stock-based compensation expense recognized in the condensed statements of operations and comprehensive loss is as follows (in thousands):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2023		2022		2023		2022
Research and development	$	48	$	54	$	148	$	152
General and administrative		67		80		222		261
Total stock-based compensation expense	$	115	$	134	$	370	$	413

Note 11. INCOME TAXES

No provision for income taxes was recorded in either of the three or nine month periods ended September 30, 2023 and 2022. The Company remains in a cumulative loss position with a full valuation allowance recorded against its net deferred income tax assets as of September 30, 2023.

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The Company evaluates tax positions for recognition using a more-likely-than-not recognition threshold, and those tax positions eligible for recognition are measured as the largest amount of tax benefit that is greater than 50% likely of being realized upon the effective settlement with a taxing authority that has full knowledge of all relevant information. As of September 30, 2023 and December 31, 2022, the Company had no unrecognized income tax benefits that would affect the Company’s effective tax rate if recognized.

Note 12. NET LOSS PER SHARE ATTRIBUTABLE TO COMMON STOCKHOLDERS

The following weighted-average common stock equivalents were excluded from the calculation of diluted net loss per share for the periods presented as they had an anti-dilutive effect:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2023		2022		2023		2022
Options to purchase common stock		205,887		115,653		168,539		99,705

Note 13. SEGMENT AND GEOGRAPHIC INFORMATION

The Company’s chief operating decision maker, its Chief Executive Officer, reviews its operating results on an aggregate basis for purposes of allocating resources and evaluating financial performance. The Company has one business activity, the discovery and development of targeted biotherapeutics to treat serious diseases and conditions with unmet medical needs, and there are no segment managers who are held accountable for operations or operating results. Accordingly, the Company operates in one reportable segment. As of September 30, 2023 and December 31, 2022, all long-lived assets are located in the United States.

Note 14. RELATED PARTY TRANSACTIONS

As discussed in Note 7, the Company leases its facility from 1895 Management, Ltd., a New York corporation controlled by an entity affiliated with the Company’s chairman and major stockholder of the Company. Lease expense incurred under the operating lease for the three month periods ended September 30, 2023 and 2022 was $45,144 and $44,000 respectively, and $135,433 and $131,000 for the nine month periods ended September 30, 2023 and 2022, respectively.

As discussed in Note 5, in November 2017, the Company entered into a research collaboration and license option agreement with Surface to identify and select antibodies against two target antigens, using the Company’s proprietary technology as described in the agreement. J. Jeffrey Goater, a former member of the Company’s board of directors, served as the Chief Business Officer of Surface at that time, and currently serves on the board of directors of Surface. During the nine months ended September 30, 2023, the Company recorded $500,000 of revenue for achievement of a milestone event. This agreement will expire upon the latest of the expiration of both research programs and all evaluation and testing periods.

On January 31, 2022, the Company entered into a stock purchase agreement pursuant to which the Company issued and sold to certain investors 583,183 shares of its common stock at a purchase price of $16.65 per share for aggregate gross proceeds of $9.7 million (“the January 2022 Private Placement”). FCMI Parent Co. ("FCMI") and Friedberg Global-Macro Hedge Fund Ltd. each purchased 120,120 shares of the Company's common stock for an aggregate purchase price of $4.0 million. Albert D. Friedberg, the Company’s chairman and beneficial owner of a majority of the Company’s outstanding common stock, controls FCMI, the Company's largest stockholder, and Friedberg Mercantile Group, the investment manager of the Friedberg Global-Macro Hedge Fund Ltd., which exercises voting and dispositive power over shares held directly by Friedberg Global-Macro Hedge Fund Ltd. Vaccinex (Rochester) L.L.C., which is majority owned and controlled by Dr. Maurice Zauderer, the Company’s President, Chief Executive Officer, and a member of its board of directors, and Benbow Estates, which is controlled by Jacob Frieberg, a member of the Company’s board of directors, also purchased 120,120 and 6,006 shares of the Company's common stock for aggregate purchase prices of $2.0 million and $0.1 million, respectively, in the January 2022 Private Placement.

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On November 18, 2022, and November 22, 2022, the Company entered into a stock purchase agreement and joinder thereto pursuant to which it issued and sold 476,167 shares of its common stock at a purchase price of $7.9395 per share for aggregate gross proceeds of approximately $3.8 million (the "November 2022 Private Placement"). Vaccinex (Rochester), L.L.C.; FCMI; Gee Eff Services Limited, which is controlled by Jacob Frieberg, one of the Company's directors; and Gerald E. Van Strydonck, another of the Company's directors, purchased 368,411 shares of the Company’s common stock for aggregate purchase price of $2.9 million in the November 2022 Private Placement.

On March 30, 2023, the Company entered into a Stock Purchase Agreement, pursuant to which the Company issued and sold 331,708 shares of its common stock at a purchase price of $6.15 per share for aggregate gross proceeds of $2.04 million (the "March 2023 Private Placement”). FCMI and Vaccinex (Rochester) L.L.C. purchased 325,204 shares of the Company's common stock for an aggregate purchase price of $2.0 million in the March 2023 Private Placement.

On May 12, 2023, pursuant to the March 2023 Stock Purchase Agreement, the Company issued and sold 527,234 shares of its common stock at a purchase price of $5.6142 per share for aggregate gross proceeds of $2.96 million. FCMI purchased 447,437 shares of the Company's common stock in relation to the May 12, 2023 sale for a purchase price of $2.51 million.

On September 20, 2023, the Company entered into the Stock Purchase Agreement, pursuant to which the Company issued and sold 248,932 shares of its common stock at a purchase price of $2.34 per share for aggregate gross proceeds of $0.58 million (the "September 2023 Private Placement”). Vaccinex (Rochester) L.L.C. purchased 136,752 shares of the Company's common stock in the September 2023 Private Placement for a purchase price of $0.32 million.

Note 15. SUBSEQUENT EVENTS

On October 3, 2023, pursuant to the Company’s registration statement on Form S-1, as amended (File No. 333-274520), and a securities purchase agreement, as applicable, the Company issued and sold to certain investors (i) 7,600,000 shares of the Company’s common stock together with common warrants to purchase up to 7,600,000 shares of common stock and (ii) 2,000,000 pre-funded warrants to purchase up to 2,000,000 shares of common stock together with common warrants to purchase up to 2,000,000 shares of common stock, at a purchase price of $1.00 and $0.999, respectively, for aggregate gross proceeds of $9.6 million (“the October 2023 Offering”). FCMI and Vaccinex (Rochester) L.L.C. purchased 3,000,000 and 500,000 shares of our common stock and accompanying common warrants, respectively, in the October 2023 Offering for an aggregate purchase price of $3.5 million.

On November 2, 2023, the Company entered into Securities Purchase Agreements with certain investors from the August and September 2023 private placements, pursuant to which the Company issued and sold 527,714 warrants to purchase up to 527,714 shares of its common stock at a purchase price of $0.125 per warrant for aggregate gross proceeds of $70,000 (the "November Warrant Offering”). Vaccinex (Rochester) L.L.C. purchased 136,752 warrants in the November Warrant Offering for a purchase price of $17,000.

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Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations

References in this Quarterly Report on Form 10-Q, or this Report, to the “Company,” “we,” “our,” or “us” mean Vaccinex, Inc. and its subsidiaries except where the context otherwise requires You should read the following discussion and analysis of financial condition and results of operations together with our condensed financial statements and related notes included elsewhere in this Report, as well as the audited financial statements, related notes and Management’s Discussion and Analysis of Financial Condition and Results of Operations and other disclosures included in our Annual Report on Form 10-K for the fiscal year ended December 31, 2022, or the Annual Report.

Cautionary Note Regarding Forward-Looking Statements

The following discussion and other parts of this Report contain forward-looking statements that involve risk and uncertainties, such as statements of our plans, objectives, expectations and intentions. In some cases, you can identify forward-looking statements by terminology such as “may,” “will,” “should,” “expects,” “plans,” “anticipates,” “believes,” “estimates,” “predicts,” “potential,” “intends” or “continue,” or the negative of these terms or other comparable terminology. Forward-looking statements include, but are not limited to, statements about:

•our ability to continue as a going concern;

•our ability to regain compliance with the Nasdaq listing requirements;

•the sufficiency of the financing arrangements we have entered into, that are intended to fund our payroll and certain other operations for a limited period of time, and our ability to service our outstanding debt obligations;

•our estimates regarding our expenses, future revenues, anticipated capital requirements and our needs for additional financing;

•the implementation of our business model and strategic plans for our business and technology;

•the timing and success of the commencement, progress and receipt of data from any of our preclinical and clinical trials;

•our expectations regarding the potential safety, efficacy or clinical utility of our product candidates;

•the expected results of any clinical trial and the impact on the likelihood or timing of any regulatory approval;

•the difficulties in obtaining and maintaining regulatory approval of our product candidates;

•the rate and degree of market acceptance of any of our product candidates;

•the success of competing therapies and products that are or become available;

•regulatory developments in the United States and foreign countries;

•current and future legislation regarding the healthcare system;

•the scope of protection we establish and maintain for intellectual property rights covering our technology;

•developments relating to our competitors and our industry;

•our failure to recruit or retain key scientific or management personnel or to retain our executive officers;

•the performance of third parties, including collaborators, contract research organizations and third-party manufacturers;

•the development of our commercialization capabilities, including the need to develop or obtain additional capabilities; and

•our use of the proceeds from the offerings of our common stock.

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Although we believe that the expectations reflected in the forward-looking statements contained herein are reasonable, we cannot guarantee future results, levels of activity, performance, or achievements. These statements are only current predictions and are subject to known and unknown risks, uncertainties and other factors that may cause our or our industry’s actual results, levels of activity, performance or achievements to be materially different from those anticipated by the forward-looking statements. Factors that could cause or contribute to such differences include, but are not limited to, those discussed in the risk factors identified in the “Risk Factors” section of this Report, and in Part I, Item 1A of the Annual Report, as well as in our other filings with the Securities and Exchange Commission, or SEC. The forward-looking statements speak only as of the date they were made. Except as required by law, after the date of this Report, we are under no duty to update or revise any of the forward-looking statements, whether as a result of new information, future events or otherwise. We qualify all of our forward-looking statements by the foregoing cautionary statements.

Common Stock Reverse Split

All per share amounts, common shares outstanding and stock-based compensation amounts for all periods reflect the effect of our 1-for-15 Reverse Stock Split, which was effective September 25, 2023. The shares of common stock retain a par value of $0.0001 per share.

Company Overview

We are a clinical-stage biotechnology company engaged in the discovery and development of targeted biotherapeutics to treat serious diseases and conditions with unmet medical needs, including neurodegenerative diseases, cancer, and autoimmune disorders. We believe we are the leader in the field of semaphorin 4D, or SEMA4D, biology and that we are the only company targeting SEMA4D as a potential treatment for neurodegenerative diseases, cancer, and autoimmune disorders. SEMA4D is an extracellular signaling molecule that regulates the activity of immune and inflammatory cells at sites of injury, cancer, or infection. We are leveraging our SEMA4D antibody platform and our extensive knowledge of SEMA4D biology to develop our lead product candidate, pepinemab, an antibody that we believe utilizes novel mechanisms of action. We are focused on developing pepinemab for the treatment of Alzheimer’s disease, Huntington’s disease, head and neck cancer, and pancreatic cancer. Additionally, third party investigators are studying pepinemab in clinical trials in breast cancer, as well as in “window of opportunity” studies in other indications, including head and neck cancer, and melanoma. We have developed multiple proprietary platform technologies and are developing product candidates to address serious diseases or conditions that have a substantial impact on day-to-day functioning and for which treatment is not addressed adequately by available therapies. We employ our proprietary platform technologies, including through our work with our academic collaborators, to identify potential product candidates for sustained expansion of our internal product pipeline and to facilitate strategic development and commercial partnerships.

Our lead platform technologies include our SEMA4D antibody platform and our ActivMAb antibody discovery platform. Our lead product candidate, pepinemab, is currently in clinical development for the treatment of Alzheimer’s disease, head and neck, pancreatic and breast cancer, through our efforts or through investigator-sponsored trials. Our additional product candidate VX5 is in an earlier stage of development and was selected using our ActivMAb platform. We believe our multiple platform technologies position us well for continued pipeline expansion and partnership opportunities going forward.

We have generated a limited amount of service revenue from collaboration agreements but have not generated any revenue from product sales to date. We continue to incur significant development and other expenses related to our ongoing operations. As a result, we are not and have never been profitable and have incurred losses in each period since our inception, resulting in substantial doubt in our ability to continue as a going concern. We reported a net loss of $4.9 million and $4.8 million for the three months ended September 30, 2023 and 2022, respectively, and a net loss of $16.9 million and $14.7 million for the nine months ended September 30, 2023 and 2022, respectively. As of September 30, 2023, and December 31, 2022, we had cash and cash equivalents of $0.1 million and $6.4 million, respectively. We expect to continue to incur significant losses for the foreseeable future, and we expect these losses to increase as we continue our research and development of, and seek regulatory approvals for, our product candidates. We may also encounter unforeseen expenses, difficulties, complications, delays and other unknown factors which may adversely affect our business. The size of our future net losses will depend, in part, on the rate of future growth of our expenses and our ability to generate revenues, if any.

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Our recurring net losses and negative cash flows from operations raised substantial doubt regarding our ability to continue as a going concern within one year after the issuance of our condensed financial statements for the three and nine months ended September 30, 2023. Until we can generate sufficient revenue from the commercialization of our product candidates, we expect to finance our operations through the public or private sale of equity, debt financing or other capital sources, such as government funding, collaborations, strategic alliances, divestment of non-core assets, or licensing arrangements with third parties. To date, the Company has relied on equity and debt financing to fund its operations, in addition to capital contributions from noncontrolling interests and a limited amount of service revenue from collaboration agreements. On March 30, 2023, the Company entered into a stock purchase agreement pursuant (the “Stock Purchase Agreement”) to which the Company issued and sold 331,708 shares of its common stock to affiliated investors, at a purchase price of $6.15 per share for aggregate gross proceeds of $2.04 million. On May 12, 2023, pursuant to the March 2023 Stock Purchase Agreement, the Company issued and sold to certain investors 527,234 shares of its common stock at a purchase price of $5.6142 per share for aggregate gross proceeds of $2.96 million (the "May 2023 Private Placement”). FCMI Parent Co. ("FCMI"), the Company's largest stockholder, purchased 447,437 shares of our common stock in the May 2023 Private Placement for a purchase price of $2.51 million. Albert D. Friedberg, the Company’s chairman and beneficial owner of a majority of the Company’s outstanding common stock, controls FCMI. In May 2023, the Company received $1.0 million through an award from the Alzheimer’s Drug Discovery Foundation in the form of an investment in our common stock. On August 18, 2023, we entered into a Stock Purchase Agreement, pursuant to which we issued and sold 209,340 shares of our common stock at a purchase price of $3.105 per share for aggregate gross proceeds of $0.65 million. On September 20, 2023, the Company entered into the Stock Purchase Agreement, pursuant to which the Company issued and sold 248,932 shares of its common stock at a purchase price of $2.34 per share for aggregate gross proceeds of $0.58 million (the "September 2023 Private Placement”). Vaccinex (Rochester) L.L.C. purchased 136,752 shares of the Company's common stock in the September 2023 Private Placement for a purchase price of $0.32 million.

Our cash and cash equivalents were $0.1 million and total current assets were $2.2 million at September 30, 2023, which will be insufficient to fund our planned operations through one year of the date that these condensed financial statements are available for issuance. See Note 1 of our unaudited condensed financial statements.

On October 3, 2023, pursuant to the Company’s registration statement on Form S-1, as amended (File No. 333-274520), and a securities purchase agreement, as applicable, the Company issued and sold to certain investors (i) 7,600,000 shares of the Company’s common stock together with common warrants to purchase up to 7,600,000 shares of common stock and (ii) 2,000,000 pre-funded warrants to purchase up to 2,000,000 shares of common stock together with common warrants to purchase up to 2,000,000 shares of common stock, at a purchase price of $1.00 and $0.999, respectively, for aggregate gross proceeds of $9.6 million (“the October 2023 Offering”). FCMI and Vaccinex (Rochester) L.L.C. purchased 3,000,000 and 500,000 shares of our common stock and accompanying common warrants, respectively, in the October 2023 Offering for an aggregate purchase price of $3.5 million. There can be no assurances that we will be able to secure additional financing when needed, or if available, that it will be sufficient to meet our needs or on favorable terms.

Nasdaq Deficiency Notices

On October 10, 2022, the Company received a letter from the Listing Qualifications staff of The Nasdaq Stock Market ("Nasdaq") notifying the Company that it is no longer in compliance with the minimum bid price requirement for continued listing on the Nasdaq Capital Market. Nasdaq Listing Rule 5550(a)(2) requires listed companies to maintain a minimum bid price of $1.00 per share. In accordance with Nasdaq Listing Rule 5810(c)(3)(A), the Company received a second 180-day compliance period, or until October 9, 2023, to regain compliance with the minimum bid price requirement. The Company did not regain compliance by October 9, 2023 and received a notice from Nasdaq that our stock is subject to delisting. The Company appealed the delisting notice and has received an extension until March 4, 2024 to regain compliance with the minimum bid price requirement, subject to fulfilling its commitments to regain compliance by such date. There can be no assurance that we will be able to regain compliance with the Nasdaq minimum bid price requirement or that our common stock will continue to be listed on Nasdaq.

On May 25, 2023, the Company received a letter from the Listing Qualifications staff of Nasdaq notifying the Company that it no longer complies with the requirement under Nasdaq Listing Rule 5550(b)(1) to maintain a

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minimum of $2.5 million in stockholders’ equity for continued listing on the Nasdaq Capital Market (the “Equity Standard”) or the alternative requirements of having a market value of listed securities of $35.0 million or net income from continuing operations of $500,000 in the most recently completed fiscal year or two of the last three most recently completed fiscal years (the “Alternative Standards”). The notification letter noted that the Company’s Form 10-Q for the period ended March 31, 2023 disclosed stockholders’ equity of $2.4 million as of March 31, 2023 and that, as of May 24, 2023, the Company did not meet the Alternative Standards. The notification letter had no immediate effect on the Company’s listing on the Nasdaq Capital Market. Nasdaq provided the Company 45 calendar days from the date of the notification letter, or until July 9, 2023, to submit a plan to regain compliance with the Equity Standard (the “Compliance Plan”). A plan to regain compliance was submitted on July 7, 2023 and was accepted on July 18, 2023, and therefore the Company was granted an extension of up to 180 calendar days from the date of the notification letter, or until November 21, 2023, to regain compliance with the Equity Standard. As of September 30, 2023, we had a stockholders' deficit of $3.9 million and had not regained compliance with the Equity Standard. On October 3, 2023 the Company raised aggregate gross proceeds of $9.6 million in a public offering of common stock and common stock equivalents, with accompanying warrants, discussed in Note 15 to the financial statements. After conducting the public offering received a letter from Nasdaq indicating we were in compliance with Nasdaq’s Equity Standard. We anticipate we will be in compliance with the Equity Standard for the period ended December 31, 2023. However, there can be no assurance that the Company will be able to retain or maintain compliance with the Equity Standard.

Corporate Update

On September 20, 2023, the Company entered into the Stock Purchase Agreement, pursuant to which the Company issued and sold 248,932 shares of its common stock at a purchase price of $2.34 per share for aggregate gross proceeds of $0.58 million (the "September 2023 Private Placement”). Vaccinex (Rochester) L.L.C., purchased 136,752 shares of the Company’s common stock in the September 2023 Private Placement for a purchase price of $0.32 million.

On September 22, 2023, the Company filed a Certificate of Amendment (the “Amendment”) to the Company’s Amended and Restated Certificate of Incorporation, with the Delaware Secretary of State to implement a reverse stock split of the Company’s issued shares of common stock at a ratio of 1-for-15, effective at 5:00 p.m. Eastern Time on September 25, 2023 (the “Reverse Stock Split”), previously approved by the Company’s Board of Directors and the Company’s stockholders. As a result of the Reverse Stock Split, every fifteen shares of the Company’s issued common stock were automatically combined into one share of common stock. The Reverse Stock Split affected all stockholders uniformly and did not alter any stockholders’ percentage interest in the Company’s common stock, except to the extent that the Reverse Stock Split resulted in any of our stockholders receiving whole shares in lieu of fractional shares, as any fractional shares resulting from the Reverse Stock Split were rounded up to the nearest whole share. Proportionate adjustments for the Reverse Stock Split were made to the exercise prices and number of shares issuable under the Company’s equity incentive plans, and the number of shares underlying outstanding equity awards, as applicable. The Reverse Stock Split did not change the par value of the common stock, modify any voting rights or other terms of the common stock, or change the number of authorized shares of the Company.

The Company’s common stock began trading on the Nasdaq Stock Market on a post-Reverse Stock Split basis under the Company’s existing trading symbol “VCNX” when the market opened on September 26, 2023. The new CUSIP number for the Company’s common stock post-Reverse Stock Split is 918640202.

On October 3, 2023, pursuant to the Company’s registration statement on Form S-1, as amended (File No. 333-274520), and a securities purchase agreement, as applicable, the Company issued and sold to certain investors (i) 7,600,000 shares of the Company’s common stock together with common warrants to purchase up to 7,600,000 shares of common stock and (ii) 2,000,000 pre-funded warrants to purchase up to 2,000,000 shares of common stock together with common warrants to purchase up to 2,000,000 shares of common stock, at a purchase price of $1.00 and $0.999, respectively, for aggregate gross proceeds of $9.6 million (“the October 2023 Offering”). FCMI and Vaccinex (Rochester) L.L.C. purchased 3,000,000 and 500,000 shares of our common stock and accompanying common warrants, respectively, in the October 2023 Offering for an aggregate purchase price of $3.5 million.

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On November 2, 2023, the Company entered into Securities Purchase Agreements with certain investors from the August and September 2023 private placements, pursuant to which the Company issued and sold 527,714 warrants to purchase up to 527,714 shares of its common stock at a purchase price of $0.125 per warrant for aggregate gross proceeds of $70,000. Vaccinex (Rochester) L.L.C. purchased 136,752 warrants in the November Warrant Offering for a purchase price of $17,000.

Clinical Update

As prespecified in the study protocol, the Company analyzed interim data from the first 36 patients in the open-label, single-arm, Phase 2 KEYNOTE B-84 study (NCT04815720) evaluating pepinemab and KEYTRUDA™ in immunotherapy naïve patients with recurrent or metastatic head and neck squamous cell carcinoma (HNSCC). The study was based on preclinical and clinical studies demonstrating that antibody blockade of semaphorin 4D (SEMA4D) in combination with immune checkpoint inhibitors (ICI) promotes infiltration of CD8+ cytotoxic T cells and inhibits the recruitment and function of myeloid derived suppressor cells (MDSC) in tumors, enabling enhanced ICI efficacy. The study results showed that pepinemab in combination with KEYTRUDA™ resulted in an approximately 2X increase in objective responses (ORR) and median progression free survival (PFS) in patients with hard-to-treat PD-L1-low tumors, those with combined positive score <20 (CPS<20), compared to historical response rates for ICI monotherapy in this population. ORR for the CPS<20 population was 21.1% with median PFS of 5.79 months, which is almost 2X that of historical response to checkpoint monotherapy in this population, ORR 11.9% and PFS 2.2 months. In contrast, patients in the CPS>20 subgroup (n=17) responded similarly to historical ICI monotherapy data. Biopsy data suggest that treatment-induced formation of highly organized lymphoid aggregates, tertiary lymphoid structures (TLS), correlate with disease control. TLS are characterized by a high density of B cells, antigen-presenting dendritic cells and activated T cells including stem-like TCF-1+, PD-1+, CD8+ T cells whose expansion and differentiation has previously been shown to be central for response to checkpoint inhibitors. The safety of pepinemab in combination with KEYTRUDA is regularly reviewed by an independent safety committee and has to date been found to be well tolerated.

In June 2023 the Company and its collaborators presented two posters in the “Trial in Progress” sessions at the American Society for Clinical Oncology (“ASCO23”):

•Phase 1b/2 PDAC Study: The team from University of Rochester Cancer Center and Wilmot Cancer Institute presented the plan for the single-arm, open-label study to evaluate pepinemab in combination with BAVENCIO®(avelumab) as second line combination immunotherapy for patients with metastatic pancreatic ductal adenocarcinoma (PDAC, TPS4195, NCT05102721). The Company-sponsored study will employ a Bayesian Optimal Interval (BOIN) Design in the Phase 1b segment and a Simon two stage assessment in the Phase 2 segment and is expected to enroll 40 subjects. The trial rationale is supported by data from prior studies suggesting that pepinemab may reduce immune suppression in the TME, rendering “cold” tumors such as PDAC to become “hot” and enhancing efficacy of ICIs such as avelumab. The study is being conducted with grant support from the Gateway Discovery Award.

•Phase 1 Metastatic Breast Cancer Study: The team from the Moffitt Cancer Center presented the plan for an open-label, Phase I study to evaluate up to 28 patients with HER2+ metastatic breast cancer (MBC, TPS1113, NCT05378464). Patients will receive a pulsed combination of dendritic cell vaccines (DC1) plus trastuzumab (an anti-HER-2 antibody) and pepinemab followed by treatment with HER2-specific T cells and lymphodepletion. The study rationale builds on results of the CLASSICAL Lung study of pepinemab and avelumab in lung cancer and the observation that pepinemab appears to modulate the TME by increasing effector cell infiltration and reducing immunosuppression.

Financial Overview

Revenue

To date, we have not generated any revenue from product sales. During the nine months ended September 30, 2023, we generated $500,000 from our collaboration agreement with Surface Oncology, and $70,000 of service revenue.

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Our ability to generate revenue and become profitable depends on our ability to successfully obtain marketing approval of and commercialize our product candidates. We do not expect to generate product revenue in the foreseeable future as we continue our development of, and seek regulatory approvals for, our product candidates, and potentially commercialize approved products, if any.

Operating Expenses

Research and Development. Research and development expenses consist primarily of costs for our clinical trials and activities related to regulatory filings, employee compensation-related costs, supply expenses, equipment depreciation and amortization, consulting and other miscellaneous costs. The following table sets forth the components of our research and development expenses and the amount as a percentage of total research and development expenses for the periods indicated.

	Three Months Ended September 30,										Nine Months Ended September 30,
	2023					2022					2023					2022
	(in thousands)		%			(in thousands)		%			(in thousands)		%			(in thousands)		%
Clinical trial costs	$	2,728		63	%	$	1,862		54	%	$	8,206		62	%	$	5,415		53	%
Wages, benefits, and related costs		1,158		27	%		1,067		31	%		3,609		27	%		3,222		31	%
Preclinical supplies and equipment depreciation		365		8	%		391		11	%		1,105		9	%		1,205		11	%
Consulting, non-clinical trial services, and other		104		2	%		109		4	%		297		2	%		396		5	%
Total research and development expenses	$	4,355				$	3,429				$	13,217				$	10,238

We expense research and development costs as incurred. We record costs for certain development activities, such as clinical trials, based on an evaluation of the progress to completion of specific tasks using data such as patient enrollment. We do not allocate employee-related costs, depreciation, rental and other indirect costs to specific research and development programs because these costs are deployed across multiple product programs under research and development.

Our current research and development activities primarily relate to clinical development in the following indications:

•Alzheimer’s Disease. In April 2023, we reached our enrollment target of 49 participants for the Phase 1b/2 SIGNAL-AD study evaluating pepinemab as a potential treatment for people with mild dementia due to Alzheimer's disease. It is anticipated that all participants will have completed 12-months treatment in June 2024, and SIGNAL-AD topline data will be reported in the second half of 2024.

•Cancer Studies. We and others have shown that SEMA4D, the target of pepinemab, is highly expressed in head and neck cancer where it impedes recruitment and activation of dendritic cells and cytotoxic T cells that can attack the tumor while also inducing differentiation of myeloid derived suppressor cells that inhibit tumoricidal immune activity. Head and neck cancer is, therefore, a cancer in which immunotherapy with pepinemab in combination with a checkpoint inhibitor such as KEYTRUDA could be uniquely effective. We have entered into a collaboration with Merck, Sharp & Dohme, who is supplying KEYTRUDA, for first-line treatment of recurrent or metastatic head and neck cancer (R/M HNSCC). Vaccinex has analyzed interim data from the first 36 patients in the open-label, single-arm, Phase 2 KEYNOTE B-84 study (NCT04815720). Study results showed that the combination therapy was well tolerated and resulted in an approximately 2X increase in objective response (ORR) and median progression free survival (PFS) in patients with hard-to-treat PD-L1-low tumors, those with combined positive score <20 (CPS<20), compared to historical response rates for checkpoint monotherapy in this population. ORR for the CPS<20 population was 21.1% with median PFS of 5.79 months, which is almost 2X that of historical response to checkpoint monotherapy in this population, ORR 11.9% and PFS 2.2 months. In contrast, the ORR and PFS for combination therapy with pepinemab in the CPS ≥20 subgroup was similar to that for historical checkpoint monotherapy. This data is consistent with a prior study in which the combination of pepinemab with PD-L1 inhibitor BAVENCIO® (avelumab) also appeared to approximately double ORR in patients with PD-L1-low non-small cell lung cancer (NCT03268057). We are also collaborating with Merck KGaA (EMD Serono in the U.S.), who is supplying Bavencio (avelumab), another checkpoint inhibitor, for combination with pepinemab in pancreatic cancer. While Pepinemab is being evaluated by third parties in investigator-sponsored trials

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for breast cancer, and in multiple “window of opportunity” studies in additional cancer indications, we have currently paused our development efforts related to Cancer research as we focus on our development of Alzheimer's research.

•Huntington’s Disease. We evaluated pepinemab for the treatment of Huntington's disease in our Phase 2 SIGNAL trial. Topline data for this trial, consisting of 265 subjects, was reported in late September 2020. Although the study did not meet its prespecified primary endpoints, it provided important new information, including evidence of cognitive benefit and a reduction in brain atrophy and increase in brain metabolic activity in patients with manifest disease symptoms. An improved study design would focus on patients with early signs of cognitive or functional deficits since they appeared to derive the greatest treatment benefit. The Company is evaluating its development strategy in terms of business opportunities and other near-term clinical activities. To advance planning for a potential phase 3 study of pepinemab in Huntington's disease, we requested a Type C meeting with the FDA to discuss details of the study design and key endpoints. The Company has received the requested clarifications regarding suitable endpoints for regulatory review from the FDA, and these will be incorporated in a possible future phase 3 study. We have currently paused our development efforts for Huntington’s disease research as we focus on our development of Alzheimer’s research.

Results of Operations

The following table set forth our results of operations for the periods presented (in thousands):

	Three Months Ended September 30,						Nine Months Ended September 30,
	2023			2022			2023			2022
Revenue	$	20		$	50		$	570		$	50
Costs and expenses:
Research and development		4,355			3,429			13,217			10,238
General and administrative		1,499			1,413			5,250			4,599
Total costs and expenses		5,854			4,842			18,467			14,837
Loss from operations		(5,834	)		(4,792	)		(17,897	)		(14,787	)
Interest expense		-			(1	)		(1	)		(2	)
Other (expense) income, net		922			34			964			52
Loss before provision for income taxes		(4,912	)		(4,759	)		(16,934	)		(14,737	)
Provision for income taxes		-			-			-			-
Net loss attributable to Vaccinex, Inc.	$	(4,912	)	$	(4,759	)	$	(16,934	)	$	(14,737	)

Comparison of the Three Months Ended September 30, 2023 and 2022

Revenue

The Company recorded service revenue of $20,000 and $50,000 during the three months ended September 30, 2023 and 2022, respectively.

Operating Expenses

	Three Months Ended September 30,
	2023		2022		$ Change		% Change
	(in thousands)
Research and development	$	4,355	$	3,429	$	926		27	%
General and administrative		1,499		1,413		86		6	%
Total operating expenses	$	5,854	$	4,842	$	1,012		21	%

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Research and Development. Research and development expenses in the three months ended September 30, 2023 increased by $0.9 million, or 27%, compared to the three months ended September 30, 2022. This increase was primarily attributable to increased patient enrollment in the SIGNAL-AD and head and neck clinical trials.

General and Administrative. General and administrative expenses consist primarily of the necessary costs associated with maintaining the Company’s daily operations and administration of the Company’s business. General and administrative expenses in the three months ended September 30, 2023 increased by $0.1 million, or 6%, compared to the three months ended September 30, 2022. This increase was attributable to increased legal and patent related services.

Other (expense) income, net. Total other (expense) income, net was income of $0.92 million for the three months ended September 30, 2023, compared to income of $34.0 thousand for the three months ended September 30, 2022. The increase in income of $0.89 million primarily resulted from the recognition of the $0.92 million employee retention credit.

Comparison of the Nine Months Ended September 30, 2023 and 2022

Revenue

The Company recorded $570,000 in revenue during the nine months ended September 30, 2023 from our collaboration agreement with Surface Oncology and service revenue. The Company recorded service revenue of $50,000 during the nine months ended September 30, 2022.

Operating Expenses

	Nine Months Ended September 30,
	2023		2022		$ Change		% Change
	(in thousands)
Research and development	$	13,217	$	10,238	$	2,979		29	%
General and administrative		5,250		4,599		651		14	%
Total operating expenses	$	18,467	$	14,837	$	3,630		24	%

Research and Development. Research and development expenses in the nine months ended September 30, 2023 increased by $3.0 million, or 29%, compared to the nine months ended September 30, 2022. This increase was primarily attributable to increased patient enrollment in the SIGNAL-AD and head and neck clinical trials.

General and Administrative. General and administrative expenses consist primarily of the necessary costs associated with maintaining the Company’s daily operations and administration of the Company’s business. General and administrative expenses in the nine months ended September 30, 2023 increased by $0.7 million, or 14%, compared to the nine months ended September, 2022. This increase was attributable to increased legal and patent related services.

Other (expense) income, net. Total other (expense) income, net was income of $0.96 million for the nine months ended September 30, 2023, compared to income of $52.0 thousand for the nine months ended September 30, 2022. The increase in income of $0.91 million primarily resulted from the recognition of the $0.92 million employee retention credit.

Liquidity and Capital Resources

To date, we have not generated any revenue from product sales. Our recurring net losses and negative cash flows from operations raised substantial doubt regarding our ability to continue as a going concern within one year after the issuance of our unaudited condensed financial statements. See Note 1 of our unaudited condensed financial statements. Since our inception in 2001, we have relied on public and private sales of equity and debt financing to

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fund our operations, in addition to capital contributions from noncontrolling interests and limited-service revenue from collaboration agreements.

On November 2, 2023, the Company entered into Securities Purchase Agreements with certain investors from the August and September 2023 private placements, pursuant to which the Company issued and sold 527,714 warrants to purchase up to 527,714 shares of its common stock at a purchase price of $0.125 per warrant for aggregate gross proceeds of $70,000. Vaccinex (Rochester) L.L.C., which is controlled by Maurice Zauderer, Ph.D., the Company’s president, chief executive officer and a member of its board of directors, purchased 136,752 warrants in the November Warrant Offering for a purchase price of $17,000.

On October 3, 2023, pursuant to the Company’s registration statement on Form S-1, as amended (File No. 333-274520), and a securities purchase agreement, as applicable, the Company issued and sold to certain investors (i) 7,600,000 shares of the Company’s common stock together with common warrants to purchase up to 7,600,000 shares of common stock and (ii) 2,000,000 pre-funded warrants to purchase up to 2,000,000 shares of common stock together with common warrants to purchase up to 2,000,000 shares of common stock, at a purchase price of $1.00 and $0.999, respectively, for aggregate gross proceeds of $9.6 million (“the October 2023 Offering”). FCMI Parent Co. ("FCMI"), which is controlled by Albert D. Friedberg, the chairman of the Company’s board of directors, and Vaccinex (Rochester) L.L.C., purchased 3,000,000 and 500,000 shares of our common stock and accompanying common warrants, respectively, in the October 2023 Offering for an aggregate purchase price of $3.5 million.

On September 20, 2023, we entered into a Stock Purchase Agreement, pursuant to which we issued and sold 248,932 shares of our common stock at a purchase price of $2.34 per share for aggregate gross proceeds of $0.58 million (the "September 2023 Private Placement"). Vaccinex (Rochester), L.L.C. participated in the September 2023 Private Placement.

On August 18, 2023, we entered into a Stock Purchase Agreement, pursuant to which we issued and sold 209,340 shares of our common stock at a purchase price of $3.105 per share for aggregate gross proceeds of $0.65 million.

On May 19, 2023, the Company filed a prospectus supplement under which the Company may offer and sell, from time to time, shares of its common stock having an aggregate offering price of up to $4,391,000 through Jefferies LLC (“Jefferies”) as sales agent pursuant to the Company’s Open Market Sale AgreementSM with Jefferies dated March 27, 2020. During the three months ended September 30, 2023, 21,123 shares were sold through the Open Market Sale Agreement for proceeds of $0.1 million, net of commission.

In May 2023 we received $1.0 million through an award from the Alzheimer’s Drug Discovery Foundation in the form of an investment in our common stock.

On May 12, 2023, pursuant to the March 2023 Stock Purchase Agreement, we issued and sold 527,234 shares of our common stock at a purchase price of $5.6142 per share for aggregate gross proceeds of $2.96 million. FCMI purchased 447,437 shares of our common stock in May 2023 for a purchase price of $2.51 million.

On March 30, 2023, we entered into a Stock Purchase Agreement, pursuant to which we issued and sold 331,708 shares of our common stock at a purchase price of $6.15 per share for aggregate gross proceeds of $2.04 million (the "March 2023 Private Placement”). FCMI and Vaccinex (Rochester) L.L.C. purchased 325,204 shares of our common stock for aggregate purchase price of $2.0 million in the March 2023 Private Placement.

On November 18, 2022 and November 22, 2022, we entered into a stock purchase agreement and joinder thereto pursuant to which we issued and sold 476,167 shares of our common stock at a purchase price of $7.9395 per share for aggregate gross proceeds of approximately $3.8 million (the "November 2022 Private Placement"). Vaccinex (Rochester), L.L.C.; FCMI; Gee Eff Services Limited, which is controlled by Jacob Frieberg, one of our directors; and Gerald E. Van Strydonck, another of our directors, purchased 368,411 shares of our common stock for aggregate purchase price of $2.9 million in the November 2022 Private Placement.

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In January 2022 we completed a private placement of 583,183 shares of our common stock and received $9.7 million and entered into an Open Market Sale Agreement with Jefferies pursuant to which we may sell up to $113.0 million shares of our common stock through Jefferies. During the year ended December 31, 2022, 212,627 shares were sold through the Open Market Sale Agreement for proceeds of $3.6 million, net of commission.

In May 2020, we received the PPP Loan in the amount of $1.1 million. During October 2021 through our intermediary lenders, the SBA communicated that it would grant forgiveness of $876,171 of the $1.1 million PPP Loan. The remaining balance of $257,429, along with applicable interest, will be amortized over the remaining term of the loan. We have extended the term of the PPP Loan to 5 years, as is currently permitted by the SBA, resulting in a maturity date of May 8, 2025. As of September 30, 2023, the remaining principal balance of the PPP Loan is approximately $119,000.

Operating Capital Requirements

Our primary uses of capital are, and we expect will continue to be, compensation and related expenses, third-party research services and amounts due to vendors for research supplies. As of September 30, 2023 and December 31, 2022, our principal source of liquidity was cash and cash equivalents in the amount of $0.1 million and $6.4 million, respectively.

Since our inception in 2001, we have incurred significant net losses and negative cash flows from operations. For the nine months ended September 30, 2023 and 2022, we reported a net loss of $16.9 million and $14.7 million, respectively. For the nine months ended September 30, 2023 and 2022, we reported cash used in operations of $13.6 million and $14.5 million, respectively. As of September 30, 2023 and December 31, 2022, we had an accumulated deficit of $336.6 million and $319.7 million, respectively. We anticipate that we will continue to generate losses for the foreseeable future, and we expect the losses to increase as we continue the development of, and seek regulatory approvals for, our product candidates. We are subject to risks associated with the development of new biopharmaceutical products, and we may encounter unforeseen expenses, difficulties, complications, delays and other unknown factors, which may adversely affect our business.

Until we can generate a sufficient amount of revenue from the commercialization of our product candidates, we expect to finance our operations through the public or private sale of equity, debt financing, or other capital sources, such as government funding, collaborations, strategic alliances, divestment of non-core assets, or licensing arrangements with third parties. We intend to use the net proceeds from our private placements, the agreements with Jefferies, and the funding we received from the Alzheimer’s Drug Discovery Foundation to fund the ongoing development of pepinemab and for working capital and general corporate purposes.

Financing strategies we may pursue include, but are not limited to, the public or private sale of equity, debt financing or funds from other capital sources, such as government funding, collaborations, strategic alliances or licensing arrangements with third parties. There can be no assurances additional capital will be available to secure additional financing, or if available, that it will be sufficient to meet our needs on favorable terms. If we are unable to raise additional capital in sufficient amounts or on terms acceptable to us, we may have to significantly delay, scale back or discontinue the development of one or more of our product candidates. If we raise additional funds through the public or private sale of equity or debt financing, it could result in dilution to our existing stockholders or increased fixed payment obligations and these securities may have rights senior to those of our common stock and could contain covenants that would restrict our operations and potentially impair our competitiveness, such as limitations on our ability to incur additional debt, limitations on our ability to acquire, sell or license our intellectual property rights and other operating restrictions that could adversely impact our ability to conduct our business. Any of these events could significantly harm our business, financial condition and prospects.

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Cash Flows

The following table summarizes our cash flows for the periods presented:

	Nine Months Ended September 30,
	2023			2022
	(in thousands)
Cash used in operating activities	$	(13,642	)	$	(14,475	)
Cash used in investing activities		(67	)		(101	)
Cash provided by financing activities		7,445			13,173

Operating Activities. We have historically experienced negative cash flows as we have developed our product candidates and continued to expand our business. Our net cash used in operating activities primarily results from our net loss adjusted for non-cash expenses and changes in working capital components as we have continued our research and development and is influenced by the timing of cash payments for research related expenses. Our primary uses of cash from operating activities are compensation and related expenses, employee-related expenditures, third-party research services and amounts due to vendors for research supplies. Our cash flows from operating activities will continue to be affected principally by the extent to which we increase spending on personnel, research and development and other operating activities as our business grows.

During the nine months ended September 30, 2023 and 2022, operating activities used $13.6 million and $14.5 million, respectively, in cash, primarily as a result of our continued efforts of discovery and development of targeted biotherapeutics to treat serious diseases and conditions with unmet medical needs without any product revenue, resulting in a net loss of $16.9 million and $14.7 million, respectively.

Investing Activities. The investing activities during the nine months ended September 30, 2023 and 2022, were due to purchases of property and equipment.

Financing Activities. During the nine months ended September 30, 2023, financing activities provided a net of $7.4 million, of which $6.3 million was due to private placements of common stock, $1.0 million through an award from the Alzheimer’s Drug Discovery Foundation in the form of an investment in our common stock and $0.2 million was due to the issuance of the Company’s common stock pursuant to the Open Market Sale Agreement. During the nine months ended September 30, 2022, financing activities provided a net of $13.2 million, of which $9.6 million was due to the private placement of common stock and $3.5 million was due to the issuance of the Company’s common stock pursuant to the Open Market Sale Agreement, net of underwriting commissions and discounts.

JOBS Act Accounting Election

We are an “emerging growth company” within the meaning of the Jumpstart Our Business Startups Act or the JOBS Act. Section 107(b) of the JOBS Act provides that an emerging growth company can leverage the extended transition period, provided in Section 102(b) of the JOBS Act, for complying with new or revised accounting standards. Thus, an emerging growth company can delay the adoption of new or revised accounting standards that have different effective dates for public and private companies until those standards apply to private companies. We have elected to use this extended transition period and, as a result, our condensed financial statements may not be comparable to companies that comply with public company effective dates of such accounting standards.

We will no longer be an "emerging growth company" after December 30, 2023 and will be unable to take advantage of the exemptions from various requirements applicable to public companies including those discussed above.

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Critical Accounting Policies and Estimates

Our unaudited condensed financial statements are prepared in accordance with accounting principles generally accepted in the United States of America. The preparation of these condensed financial statements requires us to make estimates and assumptions that affect the reported amounts of assets, liabilities, expenses and related disclosures. We evaluate our estimates and assumptions on an ongoing basis. Our estimates are based on historical experience and various other assumptions that we believe to be reasonable under the circumstances. Our actual results could differ from these estimates.

There have been no material changes to our critical accounting policies and significant judgments as compared to the critical accounting policies and estimates disclosed in our Annual Report on Form 10-K for the year ended December 31, 2022.

Impact of Recent Accounting Pronouncements

For a discussion on the impact of recent accounting pronouncements on our business, see Note 2 to our unaudited condensed financial statements.

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Item 3. Quantitative and Qualitative Disclosures about Market Risk

As a smaller reporting company, we are not required to provide the information required by this item.

Item 4. Controls and Procedures

Evaluation of disclosure controls and procedures

Our Chief Executive Officer (our principal executive officer) and Chief Financial Officer (our principal financial officer), with the participation of our management evaluated the effectiveness of the design and operation of our disclosure controls and procedures as defined in Rules 13a-15(e) and 15d-15(e) under the Securities Exchange Act of 1934, as amended, or the Exchange Act, as of September 30, 2023, the end of the period covered by this Form 10-Q. Based on that evaluation, our Chief Executive Officer and Chief Financial Officer concluded that, as of September 30, 2023, our disclosure controls and procedures were effective.

Changes in internal control over financial reporting

There were no changes in our internal control over financial reporting identified in connection with the evaluation required by Rules 13a-15(d) and 15d-15(d) of the Exchange Act that occurred during the quarter ended September 30, 2023 that materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

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Part II - OTHER INFORMATION

Item 1A. Risk Factors

An investment in our stock involves a high degree of risk. You should carefully consider the risks set forth in this section, and in Part I, Item 1A of the Annual Report on Form 10-K for the fiscal year ended December 31, 2022 (the "Annual Report"), and all of the other information set forth in this Report, the Annual Report, and in the other reports we file with the SEC. If any of the risks contained in those reports actually occur, our business, results of operation, financial condition, and liquidity could be harmed, the value of our securities could decline, and you could lose all or part of your investment. Except as set forth below, there have been no material changes from risk factors disclosed in the Annual Report. See the discussion of the Company’s risk factors under Part I, Item 1A. of the Annual Report.

We are currently not in compliance with the continued listing standards of the Nasdaq Capital Market, and if we are unable to regain compliance, our common stock will be delisted from the exchange.

Our common stock is currently listed for trading on the Nasdaq Capital Market under the symbol “VCNX." The continued listing of our common stock on The Nasdaq Stock Market ("Nasdaq") is subject to our compliance with a number of listing standards.

Minimum Bid Price Requirement

On October 10, 2022, we received a letter from the Listing Qualifications Staff of Nasdaq indicating that we no longer met the requirements of Nasdaq Listing Rule 5550(a)(2), which requires listed companies to maintain a minimum bid price of at least $1.00 per share.

In accordance with Nasdaq Listing Rule 5810(c)(3)(A), the Company received a second 180-day compliance period, or until October 9, 2023 to regain compliance with the minimum bid price requirement. We did not regain compliance by October 9, 2023 and received a notice from Nasdaq that our stock is subject to delisting. We appealed the delisting notice and have received an extension until March 4, 2024 to regain compliance with the minimum bid price requirement, subject to fulfilling our commitments to regain compliance by such date. There can be no assurance that we will be able to regain compliance with the Nasdaq minimum bid price requirements or that our common stock will continue to be listed on Nasdaq.

Minimum Stockholders’ Equity Requirement

On May 25, 2023, we received a letter from the Listing Qualifications staff of Nasdaq indicating that we no longer met the requirement under Nasdaq Listing Rule 5550(b)(1) which requires listed companies to maintain a minimum of $2.5 million in stockholders’ equity for continued listing on the Nasdaq Capital Market (the “Equity Standard”) or the alternative requirements of having a market value of listed securities of $35 million or net income from continuing operations of $500,000 in the most recently completed fiscal year or two of the last three most recently completed fiscal years (the “Alternative Standards”). Nasdaq noted that our Form 10-Q for the period ended March 31, 2023 disclosed stockholders’ equity of $2.4 million as of March 31, 2023 and that, as of May 24, 2023, we did not meet the Alternative Standards.

The notification letter has no immediate effect on the Company’s listing on the Nasdaq Capital Market. Nasdaq is providing the Company 45 calendar days from the date of the notification letter, or until July 9, 2023, to submit a plan to regain compliance with the Equity Standard (the “Compliance Plan”). A plan to regain compliance was submitted on July 7, 2023 and was accepted on July 18, 2023, and therefore the Company was granted an extension of up to 180 calendar days from the date of the notification letter, or until November 21, 2023, to regain compliance with the Equity Standard. As of September 30, 2023, we had a stockholder’s deficit of $3,869 thousand and had not regained compliance with the Equity Standard. On October 3, 2023 the Company raised aggregate gross proceeds of $9.60 million in a public offering. After conducting the public offering we received a letter from Nasdaq indicating we were in compliance with Nasdaq’s Equity Standard. We anticipate we will be in compliance with the Equity Standard for the period ended December 31, 2023. However, if the Company is not found to have regained compliance, Nasdaq could provide notice that the Company’s common stock is subject to delisting. In the

30

event the Company receives notice that its common stock is being delisted, Nasdaq rules permit the Company to appeal any delisting determination by the Nasdaq staff to a Hearings Panel.

A delisting due to either the minimum bid price requirement or minimum stockholders' equity requirement or even notification of failure to comply with such requirements would likely have a negative effect on the price of our common stock and would impair your ability to sell or purchase our common stock when you wish to do so. In addition, the delisting of our common stock could lead to a number of other negative implications such as a loss of media and analyst coverage, a determination that our common stock is a “penny stock” which will require brokers trading in our common stock to adhere to more stringent rules and likely result in a reduced level of trading activity in the secondary trading market for our securities, and materially adversely impact our ability to raise capital on acceptable terms or at all. Delisting from Nasdaq could also have other negative results, including the potential loss of confidence by our current or prospective third-party providers and collaboration partners, the loss of institutional investor interest, and fewer licensing and partnering opportunities. In the event of a delisting, we would take actions to restore our compliance with Nasdaq’s listing requirements, but we can provide no assurance that any such action would allow our common stock to become listed again, stabilize the market price or improve the liquidity of our common stock, prevent our common stock from dropping below the Nasdaq minimum bid price requirement, prevent our stockholders' equity to fail to meet the Equity Standard or Alternative Standards, or prevent future non-compliance with Nasdaq’s listing requirements.

If our common stock were no longer listed on Nasdaq, investors might only be able to trade on one of the over-the-counter markets. There is no assurance, however, that prices for our common stock would be quoted on one of these other trading systems or that an active trading market for our common stock would exist, which would materially and adversely impact the market value of our common stock and your ability to sell our common stock.

We may need to conduct a reverse stock split to affect an increase in the price of our common stock. We cannot assure you that any reverse stock split, if approved and implemented, will increase the price of our common stock or cause us to satisfy the Nasdaq continued listing requirements.

We may need to conduct a reverse stock split to increase the price of our common stock. We cannot assure you that any reverse stock split, if approved and implemented, will increase the market price of our common stock. The effect of a reverse stock split on the market price of our common stock cannot be predicted with any certainty, and the history of reverse stock splits for other companies in our industry is varied, particularly since some investors may view a reverse stock split negatively. It is possible that the per share price of our common stock after a reverse stock split will not increase in the same proportion as the reduction in the number of outstanding shares of common stock following a reverse stock split, and a reverse stock split may not result in a per share price that would attract investors who do not trade in lower priced stocks. In addition, we cannot assure you that our common stock will be more attractive to investors. Even if we implement a reverse stock split, the market price of our common stock may decrease due to factors unrelated to the reverse stock split, including our future performance. If we seek to effect a reverse stock split and it is consummated and the trading price of our common stock declines, the percentage decline as an absolute number and as a percentage of our overall market capitalization may be greater than would occur in the absence of the reverse stock split.

We may not satisfy the Nasdaq continued listing requirements following a reverse stock split, even if it is approved and implemented.

Even if a reverse stock split is approved and implemented, we may not be able to regain compliance with the bid price requirement of the Nasdaq listing standards. If our common stock ultimately were to be delisted from Nasdaq for any reason, it could negatively impact us because it would reduce the liquidity and market price of our common stock; reduce the number of investors willing to hold or acquire our common stock; negatively impact our ability to access equity markets, issue additional securities and obtain additional financing in the future; affect our ability to provide equity incentives to our employees; and negatively impact our reputation and, as a consequence, our business.

31

A reverse stock split, if approved and implemented, may decrease the liquidity of our common stock and result in higher transaction costs.

The liquidity of our common stock may be negatively impacted if a reverse stock split is approved and implemented, given the reduced number of shares that would be outstanding after the reverse stock split, particularly if the stock price does not increase as a result of the reverse stock split. In addition, if a reverse stock split is implemented, it may increase the number of our stockholders who own “odd lots” of fewer than 100 shares of common stock, which may be more difficult to sell. Brokerage commissions and other costs of transactions in odd lots are generally higher than the costs of transactions of more than 100 shares or of even multiples of 100 shares of common stock. Accordingly, a reverse stock split may not achieve the desired results of increasing marketability of our common stock.

32

Item 6. Exhibits

INDEX TO EXHIBITS

Exhibit No.	Description
3.1	Certificate of Amendment to the Amended and Restated Certificate of Incorporation of Vaccinex, Inc., effective as of September 25, 2023 (incorporated herein by reference from Exhibit 3.1 to the Company’s Current Report on Form 8-K filed on September 22, 2023)
4.1	Form of Pre-Funded Warrant (incorporated herein by reference from Exhibit 4.1 to the Company’s Current Report on Form 8-K filed on October 4, 2023)
4.2	Form of Common Stock Warrant (incorporated herein by reference from Exhibit 4.2 to the Company’s Current Report on Form 8-K filed on October 4, 2023)
10.1	Stock Purchase Agreement by and between the Company and the Investors, dated as of August 18, 2023 (incorporated herein by reference from Exhibit 10.1 to the Company’s Current Report on Form 8-K filed on August 22, 2023)
10.2	Registration Rights Agreement by and between the Company and the Investors, dated as of August 18, 2023 (incorporated herein by reference from Exhibit 10.2 to the Company’s Current Report on Form 8-K filed on August 22, 2023)
10.3	Stock Purchase Agreement by and between the Company and the Investors, dated as of September 20, 2023 (incorporated herein by reference from Exhibit 10.2 to the Company’s Current Report on Form 8-K filed on September 22, 2023)
10.4	Registration Rights Agreement by and between the Company and the Investors, dated as of September 20, 2023 (incorporated herein by reference from Exhibit 10.2 to the Company’s Current Report on Form 8-K filed on September 22, 2023)
10.5	Form of Securities Purchase Agreement, dated as of September 28, 2023 (incorporated herein by reference from Exhibit 10.2 to the Company’s Current Report on Form 8-K filed on October 4, 2023)
31.1*	Certification of Chief Executive Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
31.2*	Certification of Chief Financial Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
32.1**	Certification of Chief Executive Officer and Chief Financial Officer pursuant to 18 U.S.C. Section 1350 as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
101.INS*	Inline XBRL Instance Document
101.SCH*	Inline XBRL Taxonomy Extension Schema Document
101.CAL*	Inline XBRL Taxonomy Extension Calculation Linkbase Document
101.DEF*	Inline XBRL Taxonomy Extension Definition Linkbase Document
101.LAB*	Inline XBRL Taxonomy Extension Label Linkbase Document
101.PRE*	Inline XBRL Taxonomy Extension Presentation Linkbase Document
104*	Cover Page Interactive Data File (formatted in iXBRL and contained in Exhibit 101)

* Filed herewith.

** Furnished herewith.

33

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

		Vaccinex, Inc.
		(Registrant)
November 13, 2023	By:	/s/ Maurice Zauderer
		Maurice Zauderer, Ph.D.
		President & Chief Executive Officer
		(Principal Executive Officer)
November 13, 2023	By:	/s/ Scott E. Royer
		Scott E. Royer, CFA, MBA
		Chief Financial Officer
		(Principal Financial Officer)

34

EX-31.1

Exhibit 31.1

Certification of Chief Executive Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002

I, Maurice Zauderer, certify that:

1. I have reviewed this quarterly report on Form 10-Q for the three months ended September 30, 2023, of Vaccinex, Inc.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant's other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

  a. Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

  b. Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

  c. Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

  d. Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

5. The registrant's other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

  a. All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

  b. Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

Dated: November 13, 2023	By:	/s/ Maurice Zauderer
		Maurice Zauderer, Ph.D.
		President and Chief Executive Officer
		(Principal Executive Officer)

EX-31.2

Exhibit 31.2

Certification of Chief Executive Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002

I, Scott E. Royer, certify that:

1. I have reviewed this quarterly report on Form 10-Q for the three months ended September 30, 2023, of Vaccinex, Inc.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant's other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

  a. Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

  b. Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

  c. Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

  d. Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

5. The registrant's other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

  a. All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

  b. Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

Dated: November 13, 2023	By:	/s/ Scott E. Royer
		Scott E. Royer
		Chief Financial Officer
		(Principal Financial Officer)

EX-32.1

Exhibit 32.1

Certification of Chief Executive Officer and Chief Financial Officer pursuant to 18 U.S.C. Section 1350 as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002

In connection with the quarterly report of Vaccinex, Inc., (the "Company") on Form 10-Q for the three months ended September 30, 2023 (the "Report"), I, Maurice Zauderer, Ph.D., President and Chief Executive Officer of the Company and Scott E. Royer, Chief Financial Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

1. The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

2. The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Dated: November 13, 2023	By:	/s/ Maurice Zauderer
		Maurice Zauderer, Ph.D.
		President and Chief Executive Officer

Dated: November 13, 2023	By:	/s/ Scott E. Royer
		Scott E. Royer
		Chief Financial Officer

XML

Document And Entity Information - shares	9 Months Ended
	Sep. 30, 2023	Nov. 08, 2023
Cover [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2023
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	Q3
Entity Current Reporting Status	Yes
Trading Symbol	VCNX
Entity Registrant Name	Vaccinex, Inc.
Entity Central Index Key	0001205922
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	true
Entity Shell Company	false
Entity Ex Transition Period	false
Entity Common Stock, Shares Outstanding		12,494,275
Entity File Number	001-38624
Entity Tax Identification Number	16-1603202
Entity Address, Address Line One	1895 Mount Hope Avenue
Entity Address, City or Town	Rochester
Entity Address, State or Province	NY
Entity Address, Postal Zip Code	14620
City Area Code	585
Local Phone Number	271-2700
Entity Interactive Data Current	Yes
Title of 12(b) Security	Common Stock, $0.0001 par value
Security Exchange Name	NASDAQ
Document Quarterly Report	true
Document Transition Report	false
Entity Incorporation, State or Country Code	DE

XML

Condensed Balance Sheets (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 127	$ 6,391
Accounts receivable	933	175
Prepaid expenses and other current assets	1,146	912
Total current assets	2,206	7,478
Property and equipment, net	164	189
Operating lease right-of-use asset	188	310
TOTAL ASSETS	2,558	7,977
Current liabilities:
Accounts payable	4,225	1,518
Accrued expenses	1,895	781
Current portion of long-term debt	75	74
Operating lease liability	167	164
Total current liabilities	6,362	2,537
Long-term debt	44	101
Operating lease liability, net of current portion	21	146
TOTAL LIABILITIES	6,427	2,784
Commitments and contingencies (Note 7)
Stockholders’ equity (deficit):
Common stock, par value of $0.0001 per share; 100,000,000 shares authorized as of September 30, 2023, and December 31, 2022; 4,858,530 and 3,325,441 shares issued as of September 30, 2023 and December 31, 2022, respectively;4,858,473 and 3,325,384 shares outstanding as of September 30, 2023 and December 31, 2022, respectively	0	0
Additional paid-in capital	332,752	324,880
Treasury stock, at cost; 57 shares of common stock as of September 30, 2023 and December 31, 2022, respectively	(11)	(11)
Accumulated deficit	(336,610)	(319,676)
TOTAL STOCKHOLDERS' EQUITY/(DEFICIT)	(3,869)	5,193
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY/(DEFICIT)	$ 2,558	$ 7,977

XML

Condensed Balance Sheets (Unaudited) (Parenthetical) - $ / shares	Sep. 30, 2023	Dec. 31, 2022
Statement of Financial Position [Abstract]
Common stock, par value	$ 0.0001	$ 0.0001
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	4,858,530	3,325,441
Common stock, shares outstanding	4,858,473	3,325,384
Treasury stock, common shares	57	57

XML

Condensed Statements of Operations and Comprehensive Loss (Unaudited) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Income Statement [Abstract]
Revenue	$ 20,000	$ 50,000	$ 570,000	$ 50,000
Costs and expenses:
Research and development	4,355,000	3,429,000	13,217,000	10,238,000
General and administrative	1,499,000	1,413,000	5,250,000	4,599,000
Total costs and expenses	5,854,000	4,842,000	18,467,000	14,837,000
Loss from operations	(5,834,000)	(4,792,000)	(17,897,000)	(14,787,000)
Interest expense		(1,000)	(1,000)	(2,000)
Other income (expense), net	922,000	34,000	964,000	52,000
Loss before provision for income taxes	(4,912,000)	(4,759,000)	(16,934,000)	(14,737,000)
Provision for income taxes	0	0	0	0
Net loss attributable to Vaccinex, Inc. common stockholders	(4,912,000)	(4,759,000)	(16,934,000)	(14,737,000)
Comprehensive loss	$ (4,912,000)	$ (4,759,000)	$ (16,934,000)	$ (14,737,000)
Net loss per share attributable to Vaccinex, Inc. common stockholders, basic	$ (1.09)	$ (1.67)	$ (4.28)	$ (5.34)
Net loss per share attributable to Vaccinex, Inc. common stockholders, diluted	$ (1.09)	$ (1.67)	$ (4.28)	$ (5.34)
Weighted-average shares used in computing net loss per share attributable to Vaccinex, Inc. common stockholders, basic	4,506,834	2,844,270	3,953,431	2,757,475
Weighted-average shares used in computing net loss per share attributable toVaccinex, Inc. common stockholders, diluted	4,506,834	2,844,270	3,953,431	2,757,475

XML

Condensed Statements of Stockholders' Equity (Deficit) (Unaudited) - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Treasury Stock	Accumulated Deficit
Balance at Dec. 31, 2021	$ 7,412		$ 307,284	$ (11)	$ (299,861)
Balance, Shares at Dec. 31, 2021		2,053,464		57
Issuance of Common Shares	13,230		13,230
Issuance of Common Shares, Shares		790,863
Stock-based compensation	141		141
Net loss	(4,595)				(4,595)
Balance at Mar. 31, 2022	16,188		320,655	$ (11)	(304,456)
Balance, Shares at Mar. 31, 2022		2,844,327		57
Balance at Dec. 31, 2021	7,412		307,284	$ (11)	(299,861)
Balance, Shares at Dec. 31, 2021		2,053,464		57
Stock-based compensation	134
Net loss	(14,737)
Balance at Sep. 30, 2022	6,318		320,927	$ (11)	(314,598)
Balance, Shares at Sep. 30, 2022		2,844,327		57
Balance at Mar. 31, 2022	16,188		320,655	$ (11)	(304,456)
Balance, Shares at Mar. 31, 2022		2,844,327		57
Stock-based compensation	138		138
Net loss	(5,383)				(5,383)
Balance at Jun. 30, 2022	10,943		320,793	$ (11)	(309,839)
Balance, Shares at Jun. 30, 2022		2,844,327		57
Stock-based compensation			134
Net loss	(4,759)				(4,759)
Balance at Sep. 30, 2022	6,318		320,927	$ (11)	(314,598)
Balance, Shares at Sep. 30, 2022		2,844,327		57
Balance at Dec. 31, 2022	5,193		324,880	$ (11)	(319,676)
Balance, Shares at Dec. 31, 2022		3,325,441		57
Issuance of Common Shares	2,040		2,040
Issuance of Common Shares, Shares		331,707
Stock-based compensation	129		129
Net loss	(4,962)				(4,962)
Balance at Mar. 31, 2023	2,400		327,049	$ (11)	(324,638)
Balance, Shares at Mar. 31, 2023		3,657,148		57
Balance at Dec. 31, 2022	5,193		324,880	$ (11)	(319,676)
Balance, Shares at Dec. 31, 2022		3,325,441		57
Net loss	(16,934)
Balance at Sep. 30, 2023	$ (3,869)		332,752	$ (11)	(336,610)
Balance, Shares at Sep. 30, 2023	4,858,530			57
Balance at Mar. 31, 2023	$ 2,400		327,049	$ (11)	(324,638)
Balance, Shares at Mar. 31, 2023		3,657,148		57
Issuance of Common Shares	4,111		4,111
Issuance of Common Shares, Shares		720,802
Stock-based compensation	126		126
Net loss	(7,060)				(7,060)
Balance at Jun. 30, 2023	(423)		331,286	$ (11)	(331,698)
Balance, Shares at Jun. 30, 2023		4,377,950		57
Issuance of Common Shares	1,351
Issuance of Common Shares, Shares		480,580
Stock-based compensation	115		115
Net loss	(4,912)				(4,912)
Balance at Sep. 30, 2023	$ (3,869)		$ 332,752	$ (11)	$ (336,610)
Balance, Shares at Sep. 30, 2023	4,858,530			57

XML

Condensed Statements of Cash Flows (Unaudited) - USD ($)	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
CASH FLOWS FROM OPERATING ACTIVITIES:
Net loss	$ (16,934,000)	$ (14,737,000)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation	92,500	162,000
Stock-based compensation	370,000	413,000
Changes in operating assets and liabilities:
Accounts receivable	(758,000)	(50,000)
Prepaid expenses and other current assets	17,000	27,000
Accounts payable	2,707,000	(567,000)
Accrued expenses	864,000	277,000
Net cash used in operating activities	(13,642,000)	(14,475,000)
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchase of property and equipment	(67,000)	(101,000)
Net cash used in investing activities	(67,000)	(101,000)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from issuance of common stock	1,268,000	3,519,000
Payments of long-term debt	(57,000)	(56,000)
Proceeds from private offering of common stock	6,234,000	9,710,000
Net cash provided by financing activities	7,445,000	13,173,000
NET (DECREASE)/INCREASE IN CASH AND CASH EQUIVALENTS	(6,264,000)	(1,403,000)
CASH AND CASH EQUIVALENTS–Beginning of period	6,391,000	8,589,000
CASH AND CASH EQUIVALENTS–End of period	$ 127,000	$ 7,186,000

XML

Company and Nature of Business

9 Months Ended

Sep. 30, 2023

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Company and Nature of Business

Note 1. COMPANY AND NATURE OF BUSINESS

Vaccinex, Inc. (the “Company”) was incorporated in Delaware in April 2001 and is headquartered in Rochester, New York. The Company is a clinical-stage biotechnology company engaged in the discovery and development of targeted biotherapeutics to treat serious diseases and conditions with unmet medical needs, including cancer, neurodegenerative diseases, and autoimmune disorders. Since its inception, the Company has devoted substantially all of its efforts toward product research, manufacturing and clinical development, and raising capital.

The Company is subject to a number of risks and uncertainties common to other early-stage biotechnology companies including, but not limited to, dependency on the successful development and commercialization of its product candidates, rapid technological change and competition, dependence on key personnel and collaborative partners, uncertainty of protection of proprietary technology and patents, clinical trial uncertainty, fluctuation in operating results and financial performance, the need to obtain additional funding, compliance with governmental regulations, technological and medical risks, management of growth and effectiveness of marketing by the Company. If the Company does not successfully commercialize or partner any of its product candidates, it will be unable to generate product revenue or achieve profitability.

Going Concern

These condensed financial statements have been prepared in accordance with generally accepted accounting principles applicable to a going concern, which contemplates the realization of assets and the satisfaction of liabilities in the normal course of business.

The Company has incurred significant losses and negative cash flows from operations since inception and expects to incur additional losses until such a time it can generate significant revenue from the commercialization of its product candidates. The Company had negative cash flow from operations of $13.6 million for the nine months ended September 30, 2023, and an accumulated deficit of $336.6 million as of September 30, 2023. Given the Company’s projected operating requirements and its existing cash and cash equivalents, the Company is projecting insufficient liquidity to sustain its operations through one year following the date that the condensed financial statements are issued. These conditions and events raise substantial doubt about the Company’s ability to continue as a going concern.

In response to these conditions, management is currently evaluating different strategies to obtain the required funding of future operations. Financing strategies may include, but are not limited to, the public or private sale of equity, debt financing or funds from other capital sources, such as government funding, collaborations, strategic alliances, divestment of non-core assets, or licensing arrangements with third parties. There can be no assurances that the Company will be able to secure additional financing, or if available, that it will be sufficient to meet its needs or on favorable terms. Because management’s plans have not yet been finalized and are not within the Company’s control, the implementation of such plans cannot be considered probable. As a result, the Company has concluded that management’s plans do not alleviate substantial doubt about the Company’s ability to continue as a going concern.

The condensed financial statements do not include any adjustments relating to the recoverability and classification of recorded asset amounts or the amounts and classification of liabilities that might result from the outcome of this uncertainty.

XML

Summary of Significant Accounting Policies

9 Months Ended

Sep. 30, 2023

Accounting Policies [Abstract]

Summary of Significant Accounting Policies

Note 2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Basis of Presentation and Consolidation

The accompanying unaudited condensed financial statements reflect the accounts and operations of the Company and have been prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) for interim financial information (Accounting Standards Codification (“ASC”) 270, Interim Reporting) and with the instructions to Form 10-Q and Article 8 of Regulation S-X. Accordingly, these financial statements do not include all of the information necessary for a full presentation of financial position, results of operations, and cash flows in conformity with GAAP. In the opinion of management, the condensed financial statements reflect all adjustments (consisting of normal recurring adjustments) considered necessary for a fair presentation of the results of the Company for the periods presented.

These condensed financial statements should be read in conjunction with the Company’s audited financial statements and related notes included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2022, filed with the SEC on March 31, 2023.

Common Stock Reverse Split

On September 25, 2023, the Company effected a 1-for-15 reverse stock split of its issued shares of common stock (the "Reverse Stock Split"). All per share amounts, common shares outstanding and stock-based compensation amounts for all periods presented have been retroactively adjusted to reflect the Reverse Stock Split. The shares of common stock retain a par value of $0.0001 per share.

Use of Estimates

These condensed financial statements have been prepared in conformity with U.S. GAAP. The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities as of the date of the condensed financial statements and the reported amount of expenses during the reporting period. Such management estimates include those relating to assumptions used in the valuation of stock option awards, and valuation allowances against deferred income tax assets. Actual results could differ from those estimates.

Concentration of Credit Risk, Other Risks and Uncertainties

The Company is subject to a number of risks, including, but not limited to, the lack of available capital; the possible delisting of our common stock from Nasdaq, possible failure of preclinical testing or clinical trials; inability to obtain regulatory approval of product candidates; competitors developing new technological innovations; potential interruptions in the manufacturing and commercial supply operations; unsuccessful commercialization strategy and launch plans for its proprietary drug candidates; risks inherent in litigation, including purported class actions; market acceptance of the Company’s products; and protection of proprietary technology.

Financial instruments that potentially subject the Company to concentrations of credit risk consist primarily of cash and cash equivalents. Cash equivalents are deposited in interest-bearing money market accounts. Although the Company deposits its cash with multiple financial institutions, cash balances may occasionally be in excess of the amounts insured by the Federal Deposit Insurance Corporation. Management believes the financial risk associated with these balances is minimal and has not experienced any losses to date.

The Company has historically raised capital in transactions with investors that include members of its board of directors and entities controlled by certain board members. As such, the Company's directors, directly and indirectly, control a significant ownership percentage of the Company. The Company can provide no assurances that future financing will be available in sufficient amounts or on terms acceptable to it or that its directors or entities controlled by certain board members will be willing or able to participate in future capital raises by the Company.

The Company depends on third-party manufacturers for the manufacture of drug substances and drug product for clinical trials. The Company also relies on certain third parties for its supply chain. Disputes with these third- party manufacturers or shortages in goods or services from third-party suppliers could delay the manufacturing of the Company’s product candidates and adversely impact its results of operations.

Employee Retention Credit

The Coronavirus Aid, Relief, and Economic Security Act (the “CARES Act”) provided refundable employee retention credits, which could be used to offset payroll tax liabilities. Under the provisions of the extension of the CARES Act, the Company qualified for the employee retention credit for the last three quarters of 2020, and first three quarters of 2021, and the Company applied for the credit in September 2023. As there is no authoritative guidance under U.S. GAAP for accounting for grants to for-profit business entities, the Company accounted for the grant by applying Accounting Standards Codification (“ASC”) 450, Contingencies. The Company recognized an employee retention credit receivable of $0.9 million as of September 30, 2023 in accounts receivable on the condensed balance sheet. The Company recognized the employee retention credit during the three and nine months ended September 30, 2023 as a component of other income (expense), net on the condensed statement of operations and comprehensive income (loss).

Recently Issued Accounting Pronouncements

In the normal course of business, the Company evaluates all new Accounting Standards Updates ("ASU") and other accounting pronouncements issued by the Financial Accounting Standards Board ("FASB"), Securities and Exchange Commission ("SEC"), or other authoritative accounting bodies to determine the potential impact they may have on its condensed financial statements. The Company does not expect any of the recently issued accounting pronouncements, which have not already been adopted, to have a material impact on its condensed financial statements.

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Balance Sheet Components

9 Months Ended

Sep. 30, 2023

Balance Sheet Related Disclosures [Abstract]

Balance Sheet Components

Note 3. BALANCE SHEET COMPONENTS

Property and Equipment

Property and equipment consist of the following (in thousands):

	As of September 30, 2023			As of December 31, 2022
Leasehold improvements	$	3,277		$	3,259
Research equipment		3,351			3,515
Furniture and fixtures		350			350
Computer equipment		250			321
Property and equipment, gross		7,228			7,445
Less: accumulated depreciation and amortization		(7,064	)		(7,256	)
Property and equipment, net	$	164		$	189

Depreciation expense related to property and equipment was $31,000 and $92,500 for the three and nine months ended September 30, 2023 and $67,000 and $162,000 for the three and nine months ended September 30, 2022, respectively.

Accrued Expenses

Accrued expenses consist of the following (in thousands):

	As of September 30, 2023		As of December 31, 2022
Accrued clinical trial cost	$	1,220	$	335
Accrued payroll and related benefits		287		308
Accrued consulting and legal		382		127
Accrued other		6		11
Accrued expenses	$	1,895	$	781

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Fair Value Measurements of Financial Measurements

9 Months Ended

Sep. 30, 2023

Fair Value Disclosures [Abstract]

Fair Value Measurements of Financial Measurements

Note 4. FAIR VALUE MEASUREMENTS OF FINANCIAL MEASUREMENTS

Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis

Assets and liabilities recorded at fair value on a nonrecurring basis in the condensed balance sheets are categorized based upon the level of judgment associated with the inputs used to measure their fair values. Financial instruments consist of cash, accounts receivable, accounts payable, accrued liabilities, and long-term debt. Cash, accounts receivable, accounts payable, accrued liabilities, and debt, are stated at their carrying value, which approximates fair value due to the short time to the expected receipt or payment date of such amounts.

Assets and Liabilities Measured at Fair Value on a Recurring Basis

Fair value measurement standards also apply to certain financial assets and liabilities that are measured at fair value on a recurring basis (each reporting period). For the Company, these financial assets and liabilities include its cash equivalents deposited in money market funds. The Company does not have any nonfinancial assets or liabilities that are measured at fair value on a recurring basis.

The assets’ or liabilities’ fair value measurement level within the fair value hierarchy is based on the lowest level of any input that is significant to the fair value measurement.

The following table sets forth the fair value of the Company’s financial assets by level within the fair value hierarchy (in thousands):

	As of September 30, 2023
	Fair Value		Level 1		Level 2		Level 3
Financial Assets:
Cash equivalents:
Money market fund	$	-	$	-	$	-	$	-
Total Financial Assets	$	-	$	-	$	-	$	-

	As of December 31, 2022
	Fair Value		Level 1		Level 2		Level 3
Financial Assets:
Cash equivalents:
Money market fund	$	3,975	$	3,975	$	-	$	-
Total Financial Assets	$	3,975	$	3,975	$	-	$	-

The Company did not transfer any assets measured at fair value on a recurring basis to or from Level 1 and Level 2 during either of the nine months ended September 30, 2023 and 2022.

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Collaboration Agreements

9 Months Ended

Sep. 30, 2023

Collaboration Agreements [Abstract]

Collaboration Agreements

Note 5. COLLABORATION AGREEMENTS

Surface Oncology, Inc.

In November 2017, the Company entered into a research collaboration and license option agreement with Surface Oncology, Inc. (“Surface”) to identify and select antibodies against two target antigens, using the Company’s proprietary technology as described in the agreement. Under the agreement, Surface may purchase exclusive options, exercisable by providing a written notice to the Company, to obtain (i) an exclusive product license to make, use, sell and import products incorporating antibodies targeting the first antigen and (ii) an exclusive research tool license to use antibodies targeting the second antigen to perform research. Surface purchased the first option and exercised the second option and we entered into an exclusive research tool license agreement with Surface in the third quarter of 2019.

Under the research collaboration and license option agreement, Surface paid an upfront technology access fee of $250,000 and makes milestone payments upon completion of each of four designated milestones for the first target antigen specified in the agreement. For the second target antigen, Surface is obligated to make payments to the Company based on time incurred by the Company in the conduct of the work plan described in the agreement. Surface is required to reimburse the Company for expenses incurred (i) in the conduct of the work plan as detailed in the research funding budget and (ii) for patent filings and prosecution of the Company’s program intellectual property as described in the agreement. The exercise of each option would also entail a license fee and annual maintenance fees, and in the case of the product license, royalties and additional milestone payments. This agreement will expire upon the latest of the expiration of both research programs and all evaluation and testing periods. During the nine months ended September 30, 2023, the Company recorded $500,000 of revenue for achievement of a milestone event.

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Commitments and Contingencies

9 Months Ended

Sep. 30, 2023

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

Note 6. COMMITMENTS AND CONTINGENCIES

Nasdaq Deficiency Notices

On October 10, 2022, the Company received a letter from the Listing Qualifications staff of The Nasdaq Stock Market ("Nasdaq") notifying the Company that it is no longer in compliance with the minimum bid price requirement for continued listing on the Nasdaq Capital Market. Nasdaq Listing Rule 5550(a)(2) requires listed companies to maintain a minimum bid price of $1.00 per share. In accordance with Nasdaq Listing Rule 5810(c)(3)(A), the Company received a second 180-day compliance period, or until October 9, 2023, to regain compliance with the minimum bid price requirement. The Company did not regain compliance by October 9, 2023 and received a notice from Nasdaq that its stock is subject to delisting. The Company appealed the delisting notice and has received an extension until March 4, 2024 to regain compliance with the minimum bid price requirement, subject to fulfilling its commitments to regain compliance by such date. There can be no assurance that the Company will be able to regain compliance with the Nasdaq minimum bid price requirements or that its common stock will continue to be listed on Nasdaq.

On May 25, 2023, the Company received a letter from the Listing Qualifications staff of Nasdaq notifying the Company that it no longer complies with the requirement under Nasdaq Listing Rule 5550(b)(1) to maintain a minimum of $2.5 million in stockholders’ equity for continued listing on the Nasdaq Capital Market (the “Equity Standard”) or the alternative requirements of having a market value of listed securities of $35.0 million or net income from continuing operations of $500,000 in the most recently completed fiscal year or two of the last three most recently completed fiscal years (the “Alternative Standards”). The notification letter noted that the Company’s Form 10-Q for the period ended March 31, 2023 disclosed stockholders’ equity of $2.4 million as of March 31, 2023 and that, as of May 24, 2023, the Company did not meet the Alternative Standards. The notification letter had no immediate effect on the Company’s listing on the Nasdaq Capital Market. Nasdaq provided the Company 45 calendar days from the date of the notification letter, or until July 9, 2023, to submit a plan to regain compliance with the Equity Standard (the “Compliance Plan”). A plan to regain compliance was submitted on July 7, 2023 and was accepted on July 18, 2023, and therefore the Company was granted an extension of up to 180 calendar days from the date of the notification letter, or until November 21, 2023, to regain compliance with the Equity Standard. As of September 30, 2023, we had a stockholder's deficit of $3.9 million and had not regained compliance with the Equity Standard.

On October 3, 2023 the Company’s raised aggregate gross proceeds of $9.6 million in a public offering of common stock and common stock equivalents, with accompanying warrants, discussed in Note 15 below. After conducting the public offering we received a letter from Nasdaq indicating we were in compliance with Nasdaq’s Equity Standard. We anticipate we will be in compliance with the Equity Standard for the period ended December 31, 2023. However, there can be no assurance that the Company will be able to regain or maintain compliance with the Equity Standard.

Other Contingencies

The Company is subject to claims and assessments from time to time in the ordinary course of business. The Company records a provision for a liability when it believes that it is both probable that a liability has been incurred and the amount can be reasonably estimated. Significant judgment is required to determine both probability and the estimated amount.

In the normal course of business, the Company may become involved in legal proceedings. The Company will accrue a liability for such matters when it is probable that a liability has been incurred and the amount can be reasonably estimated. When only a range of possible loss can be established, the most probable amount in the range is accrued. If no amount within this range is a better estimate than any other amount within the range, the minimum amount in the range is accrued. The accrual for a litigation loss contingency might include, for example, estimates of potential damages, outside legal fees and other directly related costs expected to be incurred. As of September 30, 2023 and December 31, 2022 the Company was not involved in any material legal proceedings.

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Leases

9 Months Ended

Sep. 30, 2023

Leases [Abstract]

Leases

Note 7. LEASES

The Company leases its facilities from 1895 Management, Ltd., a New York corporation controlled by an entity affiliated with a director of the Company, under non-cancellable operating leases. Following entry into a lease extension agreement in August 2022, the lease agreement requires monthly rental payments of $15,048 through October 31, 2024. The Company is responsible for all maintenance, utilities, insurance and taxes related to the facility. The Company has elected the practical expedient on not separating lease components from non-lease components.

The Company accounts for its leases under ASC 842, Leases. Leases with an initial term of 12 months or less are not recorded on the condensed balance sheet. The Company determines if an arrangement is a lease at inception. Right-of-use assets represent the Company’s right to use an underlying asset for the lease term and lease liabilities represent the Company’s obligation to make lease payments arising from the lease. Operating lease right-of-use assets and lease liabilities are recognized based on the present value of lease payments over the lease term. The leases do not provide an implicit rate so in determining the present value of lease payments, the Company its incremental borrowing rate for the applicable lease, which was 7.0%. The Company recognizes lease expense on a straight-line basis over the remaining lease term.

As of September 30, 2023, the future minimum payments for the operating leases total $195,626, less imputed interest of $7,760, for an operating lease liability of $187,866 as of September 30, 2023. For the nine months ended September 30, 2023, cash paid for amounts included in the measurement of lease liabilities was $135,434.

Lease expense incurred under the operating lease for the three month periods ended September 30, 2023 and 2022 was $45,144 and $44,000 respectively, and $135,433 and $131,000 for the nine month periods ended September 30, 2023 and 2022, respectively. Lease expense is a component of general and administrative expense.

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Long-term Debt

9 Months Ended

Sep. 30, 2023

Debt Instruments [Abstract]

Long-term Debt

Note 8. LONG-TERM DEBT

On May 8, 2020, the Company received a loan under the Small Business Administration's Paycheck Protection Program (the "PPP Loan") in the amount of $1,133,600. The PPP Loan originally matured on May 8, 2022, with no principal payments required prior to the maturity date, and bearing interest at an annual rate of 1.0%, with interest payments commencing on November 8, 2020, less the amount of any potential forgiveness. On November 8, 2021, the Company was awarded loan forgiveness of $876,171 and the remaining balance of the loan was refinanced. The loan has a maturity date of May 8, 2025, bears interest of 1%, and is being repaid in monthly

payments of $6,334. The Company has recorded interest expense of $336 and $1,141 for the three and nine month periods ended September 30, 2023 and $523 and $1,764 for the three and nine month periods ended September 30, 2022, respectively on its condensed statements of operations and comprehensive loss.

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Common Stock Reserved For Issuance

9 Months Ended

Sep. 30, 2023

Equity [Abstract]

Common Stock Reserved For Issuance

Note 9. COMMON STOCK RESERVED FOR ISSUANCE

Common stock has been reserved for the following potential future issuance:

	As of September 30, 2023		As of December 31, 2022
Shares underlying outstanding stock options		205,887		118,795
Shares available for future stock option grants		4,925		25,521
Total shares of common stock reserved		210,812		144,316

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Stock-Based Compensation

9 Months Ended

Sep. 30, 2023

Share-Based Payment Arrangement [Abstract]

Stock-Based Compensation

Note 10. STOCK-BASED COMPENSATION

2011 Employee Equity Plan

In connection with the adoption of the Company’s 2018 Omnibus Incentive Plan (the “2018 Plan”) in August 2018, the Company ceased granting stock options under the Company’s 2011 Employee Equity Plan (the “2011 Plan”). However, the 2011 Plan will continue to govern the terms and conditions of the outstanding stock options previously granted thereunder. Any shares of stock related to awards outstanding under the 2011 Plan that terminate by expiration, forfeiture, cancellation, or otherwise without the issuance of such shares will become available for grant under the 2018 Plan. Stock options granted under the 2011 Plan expire in five or ten years from the date of grant.

2018 Omnibus Incentive Plan

In August 2018, the Company’s board of directors adopted, and its stockholders approved, the 2018 Plan, which allows for the granting of stock, stock options, and stock appreciation rights awards to employees, advisors and consultants. Stock options granted under the 2018 Plan may be either incentive stock options or non-statutory stock options. Incentive stock options may be granted to employees, advisors and consultants at exercise prices of no less than the fair value of the common stock on the grant date. If at the time of grant, the optionee owns stock representing more than 10% of the voting power of all classes of stock of the Company, the exercise price must be at least 110% of the fair value of the common stock on the grant date as determined by the board of directors. Non-statutory stock options may be granted to employees, advisors and consultants at exercise prices of less than the fair market value of a share of common stock on the date the non-statutory stock option is granted but shall under no circumstances be less than adequate consideration as determined by the board of directors for such a share. The vesting period of stock option grants is determined by the board of directors, ranging from zero to eight years. Stock options granted under the 2018 Plan expire in five or ten years from the date of grant.

The Company initially reserved 28,333 shares of common stock for issuance, subject to certain adjustments, pursuant to awards under the 2018 Plan. Any shares of common stock related to awards outstanding under the 2011 Plan as of the effective date of the 2018 Plan, which thereafter terminate by expiration, forfeiture, cancellation or otherwise without the issuance of such shares, will be added to, and included in, the number of shares of common stock available for grant under the 2018 Plan. In addition, effective January 1, 2020 and continuing until the expiration of the 2018 Plan, the number of shares of common stock available for issuance under the 2018 Plan will automatically increase annually by 2% of the total number of issued and outstanding shares of the Company’s common stock as of December 31 of the preceding year or such lesser number as the Company’s board of directors may decide, which may be zero. Accordingly, on January 1, 2023, 66,508 additional shares of common stock became available for issuance under the 2018 Plan.

A summary of the Company’s stock option activity and related information is as follows:

	Stock Options			Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Life (Years)		Aggregate Intrinsic Value (in thousands)
Balance as of January 1, 2023		118,795		$	59.68		7.1	$	4
Granted		91,689			6.06
Exercised		-			-			$	-
Forfeited		(211	)		90.71
Expired		(4,386	)		223.60
Balance as of September 30, 2023		205,887		$	32.29		7.9	$	-
Exercisable as of September 30, 2023		95,956		$	56.76		6.4	$	-

The weighted-average grant date fair value of stock options granted to employees and directors for the nine months ended September 30, 2023 and 2022 was $4.15 per share and $11.94 per share, respectively. The aggregate grant date fair value of stock options that vested during the nine months ended September 30, 2023 and 2022 was $513,718 and $604,626, respectively.

The intrinsic value of stock options vested and exercisable and expected to vest and become exercisable is calculated based on the difference between the exercise price and the fair value of the Company’s common stock as of September 30, 2023 and December 31, 2022. The intrinsic value of exercised stock options is the difference between the fair value of the underlying common stock and the exercise price as of the exercise date.

As of September 30, 2023 and December 31, 2022, total unrecognized compensation cost related to stock options granted to employees was $572,490 and $561,198, respectively, which is expected to be recognized over a weighted-average period of 2.2 and 2.1 years, respectively.

The grant date fair value of employee stock options was estimated using a Black-Scholes option-pricing model with the following weighted-average assumptions:

	Nine Months Ended September 30,
	2023			2022
Expected term (in years)		6.0			6.0
Expected volatility		75	%		75	%
Risk-free interest rate		3.7	%		2.3	%
Expected dividend yield		-	%		-	%

Total stock-based compensation expense recognized in the condensed statements of operations and comprehensive loss is as follows (in thousands):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2023		2022		2023		2022
Research and development	$	48	$	54	$	148	$	152
General and administrative		67		80		222		261
Total stock-based compensation expense	$	115	$	134	$	370	$	413

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Income Taxes

9 Months Ended

Sep. 30, 2023

Income Tax Disclosure [Abstract]

Income Taxes

Note 11. INCOME TAXES

No provision for income taxes was recorded in either of the three or nine month periods ended September 30, 2023 and 2022. The Company remains in a cumulative loss position with a full valuation allowance recorded against its net deferred income tax assets as of September 30, 2023.

The Company evaluates tax positions for recognition using a more-likely-than-not recognition threshold, and those tax positions eligible for recognition are measured as the largest amount of tax benefit that is greater than 50% likely of being realized upon the effective settlement with a taxing authority that has full knowledge of all relevant information. As of September 30, 2023 and December 31, 2022, the Company had no unrecognized income tax benefits that would affect the Company’s effective tax rate if recognized.

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Net Loss Per Share Attributable to Common Stockholders

9 Months Ended

Sep. 30, 2023

Earnings Per Share [Abstract]

Net Loss Per Share Attributable to Common Stockholders

Note 12. NET LOSS PER SHARE ATTRIBUTABLE TO COMMON STOCKHOLDERS

The following weighted-average common stock equivalents were excluded from the calculation of diluted net loss per share for the periods presented as they had an anti-dilutive effect:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2023		2022		2023		2022
Options to purchase common stock		205,887		115,653		168,539		99,705

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Segment and Geographical Information

9 Months Ended

Sep. 30, 2023

Segment Reporting [Abstract]

Segment and Geographic Information

Note 13. SEGMENT AND GEOGRAPHIC INFORMATION

The Company’s chief operating decision maker, its Chief Executive Officer, reviews its operating results on an aggregate basis for purposes of allocating resources and evaluating financial performance. The Company has one business activity, the discovery and development of targeted biotherapeutics to treat serious diseases and conditions with unmet medical needs, and there are no segment managers who are held accountable for operations or operating results. Accordingly, the Company operates in one reportable segment. As of September 30, 2023 and December 31, 2022, all long-lived assets are located in the United States.

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Related Party Transactions

9 Months Ended

Sep. 30, 2023

Related Party Transactions [Abstract]

Related Party Transactions

Note 14. RELATED PARTY TRANSACTIONS

As discussed in Note 7, the Company leases its facility from 1895 Management, Ltd., a New York corporation controlled by an entity affiliated with the Company’s chairman and major stockholder of the Company. Lease expense incurred under the operating lease for the three month periods ended September 30, 2023 and 2022 was $45,144 and $44,000 respectively, and $135,433 and $131,000 for the nine month periods ended September 30, 2023 and 2022, respectively.

As discussed in Note 5, in November 2017, the Company entered into a research collaboration and license option agreement with Surface to identify and select antibodies against two target antigens, using the Company’s proprietary technology as described in the agreement. J. Jeffrey Goater, a former member of the Company’s board of directors, served as the Chief Business Officer of Surface at that time, and currently serves on the board of directors of Surface. During the nine months ended September 30, 2023, the Company recorded $500,000 of revenue for achievement of a milestone event. This agreement will expire upon the latest of the expiration of both research programs and all evaluation and testing periods.

On January 31, 2022, the Company entered into a stock purchase agreement pursuant to which the Company issued and sold to certain investors 583,183 shares of its common stock at a purchase price of $16.65 per share for aggregate gross proceeds of $9.7 million (“the January 2022 Private Placement”). FCMI Parent Co. ("FCMI") and Friedberg Global-Macro Hedge Fund Ltd. each purchased 120,120 shares of the Company's common stock for an aggregate purchase price of $4.0 million. Albert D. Friedberg, the Company’s chairman and beneficial owner of a majority of the Company’s outstanding common stock, controls FCMI, the Company's largest stockholder, and Friedberg Mercantile Group, the investment manager of the Friedberg Global-Macro Hedge Fund Ltd., which exercises voting and dispositive power over shares held directly by Friedberg Global-Macro Hedge Fund Ltd. Vaccinex (Rochester) L.L.C., which is majority owned and controlled by Dr. Maurice Zauderer, the Company’s President, Chief Executive Officer, and a member of its board of directors, and Benbow Estates, which is controlled by Jacob Frieberg, a member of the Company’s board of directors, also purchased 120,120 and 6,006 shares of the Company's common stock for aggregate purchase prices of $2.0 million and $0.1 million, respectively, in the January 2022 Private Placement.

On November 18, 2022, and November 22, 2022, the Company entered into a stock purchase agreement and joinder thereto pursuant to which it issued and sold 476,167 shares of its common stock at a purchase price of $7.9395 per share for aggregate gross proceeds of approximately $3.8 million (the "November 2022 Private Placement"). Vaccinex (Rochester), L.L.C.; FCMI; Gee Eff Services Limited, which is controlled by Jacob Frieberg, one of the Company's directors; and Gerald E. Van Strydonck, another of the Company's directors, purchased 368,411 shares of the Company’s common stock for aggregate purchase price of $2.9 million in the November 2022 Private Placement.

On March 30, 2023, the Company entered into a Stock Purchase Agreement, pursuant to which the Company issued and sold 331,708 shares of its common stock at a purchase price of $6.15 per share for aggregate gross proceeds of $2.04 million (the "March 2023 Private Placement”). FCMI and Vaccinex (Rochester) L.L.C. purchased 325,204 shares of the Company's common stock for an aggregate purchase price of $2.0 million in the March 2023 Private Placement.

On May 12, 2023, pursuant to the March 2023 Stock Purchase Agreement, the Company issued and sold 527,234 shares of its common stock at a purchase price of $5.6142 per share for aggregate gross proceeds of $2.96 million. FCMI purchased 447,437 shares of the Company's common stock in relation to the May 12, 2023 sale for a purchase price of $2.51 million.

On September 20, 2023, the Company entered into the Stock Purchase Agreement, pursuant to which the Company issued and sold 248,932 shares of its common stock at a purchase price of $2.34 per share for aggregate gross proceeds of $0.58 million (the "September 2023 Private Placement”). Vaccinex (Rochester) L.L.C. purchased 136,752 shares of the Company's common stock in the September 2023 Private Placement for a purchase price of $0.32 million.

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Subsequent Events

9 Months Ended

Sep. 30, 2023

Subsequent Events [Abstract]

Subsequent Events

Note 15. SUBSEQUENT EVENTS

On October 3, 2023, pursuant to the Company’s registration statement on Form S-1, as amended (File No. 333-274520), and a securities purchase agreement, as applicable, the Company issued and sold to certain investors (i) 7,600,000 shares of the Company’s common stock together with common warrants to purchase up to 7,600,000 shares of common stock and (ii) 2,000,000 pre-funded warrants to purchase up to 2,000,000 shares of common stock together with common warrants to purchase up to 2,000,000 shares of common stock, at a purchase price of $1.00 and $0.999, respectively, for aggregate gross proceeds of $9.6 million (“the October 2023 Offering”). FCMI and Vaccinex (Rochester) L.L.C. purchased 3,000,000 and 500,000 shares of our common stock and accompanying common warrants, respectively, in the October 2023 Offering for an aggregate purchase price of $3.5 million.

On November 2, 2023, the Company entered into Securities Purchase Agreements with certain investors from the August and September 2023 private placements, pursuant to which the Company issued and sold 527,714 warrants to purchase up to 527,714 shares of its common stock at a purchase price of $0.125 per warrant for aggregate gross proceeds of $70,000 (the "November Warrant Offering”). Vaccinex (Rochester) L.L.C. purchased 136,752 warrants in the November Warrant Offering for a purchase price of $17,000.

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Summary of Significant Accounting Policies (Policies)

9 Months Ended

Sep. 30, 2023

Accounting Policies [Abstract]

Basis of Presentation and Consolidation

Basis of Presentation and Consolidation

The accompanying unaudited condensed financial statements reflect the accounts and operations of the Company and have been prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) for interim financial information (Accounting Standards Codification (“ASC”) 270, Interim Reporting) and with the instructions to Form 10-Q and Article 8 of Regulation S-X. Accordingly, these financial statements do not include all of the information necessary for a full presentation of financial position, results of operations, and cash flows in conformity with GAAP. In the opinion of management, the condensed financial statements reflect all adjustments (consisting of normal recurring adjustments) considered necessary for a fair presentation of the results of the Company for the periods presented.

These condensed financial statements should be read in conjunction with the Company’s audited financial statements and related notes included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2022, filed with the SEC on March 31, 2023.

Common Stock Reverse Split

On September 25, 2023, the Company effected a 1-for-15 reverse stock split of its issued shares of common stock (the "Reverse Stock Split"). All per share amounts, common shares outstanding and stock-based compensation amounts for all periods presented have been retroactively adjusted to reflect the Reverse Stock Split. The shares of common stock retain a par value of $0.0001 per share.

Common Stock Reverse Split

Common Stock Reverse Split

On September 25, 2023, the Company effected a 1-for-15 reverse stock split of its issued shares of common stock (the "Reverse Stock Split"). All per share amounts, common shares outstanding and stock-based compensation amounts for all periods presented have been retroactively adjusted to reflect the Reverse Stock Split. The shares of common stock retain a par value of $0.0001 per share.

Use of Estimates

Use of Estimates

These condensed financial statements have been prepared in conformity with U.S. GAAP. The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities as of the date of the condensed financial statements and the reported amount of expenses during the reporting period. Such management estimates include those relating to assumptions used in the valuation of stock option awards, and valuation allowances against deferred income tax assets. Actual results could differ from those estimates.

Concentration of Credit Risk, Other Risks and Uncertainties

Concentration of Credit Risk, Other Risks and Uncertainties

The Company is subject to a number of risks, including, but not limited to, the lack of available capital; the possible delisting of our common stock from Nasdaq, possible failure of preclinical testing or clinical trials; inability to obtain regulatory approval of product candidates; competitors developing new technological innovations; potential interruptions in the manufacturing and commercial supply operations; unsuccessful commercialization strategy and launch plans for its proprietary drug candidates; risks inherent in litigation, including purported class actions; market acceptance of the Company’s products; and protection of proprietary technology.

Financial instruments that potentially subject the Company to concentrations of credit risk consist primarily of cash and cash equivalents. Cash equivalents are deposited in interest-bearing money market accounts. Although the Company deposits its cash with multiple financial institutions, cash balances may occasionally be in excess of the amounts insured by the Federal Deposit Insurance Corporation. Management believes the financial risk associated with these balances is minimal and has not experienced any losses to date.

The Company has historically raised capital in transactions with investors that include members of its board of directors and entities controlled by certain board members. As such, the Company's directors, directly and indirectly, control a significant ownership percentage of the Company. The Company can provide no assurances that future financing will be available in sufficient amounts or on terms acceptable to it or that its directors or entities controlled by certain board members will be willing or able to participate in future capital raises by the Company.

The Company depends on third-party manufacturers for the manufacture of drug substances and drug product for clinical trials. The Company also relies on certain third parties for its supply chain. Disputes with these third- party manufacturers or shortages in goods or services from third-party suppliers could delay the manufacturing of the Company’s product candidates and adversely impact its results of operations.

Employee Retention Credit

The Coronavirus Aid, Relief, and Economic Security Act (the “CARES Act”) provided refundable employee retention credits, which could be used to offset payroll tax liabilities. Under the provisions of the extension of the CARES Act, the Company qualified for the employee retention credit for the last three quarters of 2020, and first three quarters of 2021, and the Company applied for the credit in September 2023. As there is no authoritative guidance under U.S. GAAP for accounting for grants to for-profit business entities, the Company accounted for the grant by applying Accounting Standards Codification (“ASC”) 450, Contingencies. The Company recognized an employee retention credit receivable of $0.9 million as of September 30, 2023 in accounts receivable on the condensed balance sheet. The Company recognized the employee retention credit during the three and nine months ended September 30, 2023 as a component of other income (expense), net on the condensed statement of operations and comprehensive income (loss).

Employee Retention Credit

Employee Retention Credit

The Coronavirus Aid, Relief, and Economic Security Act (the “CARES Act”) provided refundable employee retention credits, which could be used to offset payroll tax liabilities. Under the provisions of the extension of the CARES Act, the Company qualified for the employee retention credit for the last three quarters of 2020, and first three quarters of 2021, and the Company applied for the credit in September 2023. As there is no authoritative guidance under U.S. GAAP for accounting for grants to for-profit business entities, the Company accounted for the grant by applying Accounting Standards Codification (“ASC”) 450, Contingencies. The Company recognized an employee retention credit receivable of $0.9 million as of September 30, 2023 in accounts receivable on the condensed balance sheet. The Company recognized the employee retention credit during the three and nine months ended September 30, 2023 as a component of other income (expense), net on the condensed statement of operations and comprehensive income (loss).

Recently Issued Accounting Pronouncements

Recently Issued Accounting Pronouncements

In the normal course of business, the Company evaluates all new Accounting Standards Updates ("ASU") and other accounting pronouncements issued by the Financial Accounting Standards Board ("FASB"), Securities and Exchange Commission ("SEC"), or other authoritative accounting bodies to determine the potential impact they may have on its condensed financial statements. The Company does not expect any of the recently issued accounting pronouncements, which have not already been adopted, to have a material impact on its condensed financial statements.

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Balance Sheet Components (Tables)

9 Months Ended

Sep. 30, 2023

Balance Sheet Related Disclosures [Abstract]

Property and Equipment

Property and equipment consist of the following (in thousands):

	As of September 30, 2023			As of December 31, 2022
Leasehold improvements	$	3,277		$	3,259
Research equipment		3,351			3,515
Furniture and fixtures		350			350
Computer equipment		250			321
Property and equipment, gross		7,228			7,445
Less: accumulated depreciation and amortization		(7,064	)		(7,256	)
Property and equipment, net	$	164		$	189

Accrued Expenses

Accrued expenses consist of the following (in thousands):

	As of September 30, 2023		As of December 31, 2022
Accrued clinical trial cost	$	1,220	$	335
Accrued payroll and related benefits		287		308
Accrued consulting and legal		382		127
Accrued other		6		11
Accrued expenses	$	1,895	$	781

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Fair Value Measurements of Financial Measurements (Tables)

9 Months Ended

Sep. 30, 2023

Fair Value Disclosures [Abstract]

Summary of Fair Value of Financial Assets by Level within Fair Value Hierarchy

The following table sets forth the fair value of the Company’s financial assets by level within the fair value hierarchy (in thousands):

	As of September 30, 2023
	Fair Value		Level 1		Level 2		Level 3
Financial Assets:
Cash equivalents:
Money market fund	$	-	$	-	$	-	$	-
Total Financial Assets	$	-	$	-	$	-	$	-

	As of December 31, 2022
	Fair Value		Level 1		Level 2		Level 3
Financial Assets:
Cash equivalents:
Money market fund	$	3,975	$	3,975	$	-	$	-
Total Financial Assets	$	3,975	$	3,975	$	-	$	-

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Common Stock Reserved For Issuance (Tables)

9 Months Ended

Sep. 30, 2023

Equity [Abstract]

Common Stock Reserved for Potential Future Issuances

Common stock has been reserved for the following potential future issuance:

	As of September 30, 2023		As of December 31, 2022
Shares underlying outstanding stock options		205,887		118,795
Shares available for future stock option grants		4,925		25,521
Total shares of common stock reserved		210,812		144,316

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Stock-Based Compensation (Tables)

9 Months Ended

Sep. 30, 2023

Share-Based Payment Arrangement [Abstract]

Summary of Stock Option Activity and Related Information

A summary of the Company’s stock option activity and related information is as follows:

	Stock Options			Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Life (Years)		Aggregate Intrinsic Value (in thousands)
Balance as of January 1, 2023		118,795		$	59.68		7.1	$	4
Granted		91,689			6.06
Exercised		-			-			$	-
Forfeited		(211	)		90.71
Expired		(4,386	)		223.60
Balance as of September 30, 2023		205,887		$	32.29		7.9	$	-
Exercisable as of September 30, 2023		95,956		$	56.76		6.4	$	-

Grant Date Fair Value of Employee Stock Options Estimated Using Black-Scholes Option-Pricing Model with Weighted-Average Assumptions

The grant date fair value of employee stock options was estimated using a Black-Scholes option-pricing model with the following weighted-average assumptions:

	Nine Months Ended September 30,
	2023			2022
Expected term (in years)		6.0			6.0
Expected volatility		75	%		75	%
Risk-free interest rate		3.7	%		2.3	%
Expected dividend yield		-	%		-	%

Total Stock-Based Compensation Expense Recognized in Condensed Statements of Operations and Comprehensive Loss

Total stock-based compensation expense recognized in the condensed statements of operations and comprehensive loss is as follows (in thousands):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2023		2022		2023		2022
Research and development	$	48	$	54	$	148	$	152
General and administrative		67		80		222		261
Total stock-based compensation expense	$	115	$	134	$	370	$	413

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Net Loss Per Share Attributable to Common Stockholders (Tables)

9 Months Ended

Sep. 30, 2023

Earnings Per Share [Abstract]

Weighted-Average Common Stock Equivalents Excluded from Calculation of Diluted Net Loss Per Share as They Had Anti-Dilutive Effect

The following weighted-average common stock equivalents were excluded from the calculation of diluted net loss per share for the periods presented as they had an anti-dilutive effect:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2023		2022		2023		2022
Options to purchase common stock		205,887		115,653		168,539		99,705

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Company and Nature of Business - Additional Information (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Cash flow from operations	$ (13,642)	$ (14,475)
Accumulated deficit	$ 336,610		$ 319,676

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Summary of Significant Accounting Policies - Additional Information (Details) $ / shares in Units, $ in Millions		9 Months Ended
	Sep. 25, 2023 $ / shares	Sep. 30, 2023 USD ($) $ / shares	Dec. 31, 2022 $ / shares
Accounting Policies [Abstract]
Reverse stock split description		Company effected a 1-for-15 reverse stock split of its issued shares of common stock (the "Reverse Stock Split"). All per share amounts, common shares outstanding and stock-based compensation amounts for all periods presented have been retroactively adjusted to reflect the Reverse Stock Split.
Stock split, conversion ratio	0.15
Common stock, par value | $ / shares	$ 0.0001	$ 0.0001	$ 0.0001
Employee retention credit | $		$ 0.9

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Balance Sheet Components - Property and Equipment (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Property Plant And Equipment [Line Items]
Property and equipment, gross	$ 7,228	$ 7,445
Less: accumulated depreciation and amortization	(7,064)	(7,256)
Property and equipment, net	164	189
Leasehold Improvements
Property Plant And Equipment [Line Items]
Property and equipment, gross	3,277	3,259
Research Equipment
Property Plant And Equipment [Line Items]
Property and equipment, gross	3,351	3,515
Furniture and Fixtures
Property Plant And Equipment [Line Items]
Property and equipment, gross	350	350
Computer Equipment
Property Plant And Equipment [Line Items]
Property and equipment, gross	$ 250	$ 321

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Balance Sheet Components - Additional Information (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Property, Plant and Equipment [Abstract]
Depreciation	$ 31,000	$ 67,000	$ 92,500	$ 162,000

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Balance Sheet Components - Schedule of Accrued Expenses (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Payables and Accruals [Abstract]
Accrued clinical trial cost	$ 1,220	$ 335
Accrued payroll and related benefits	287	308
Accrued consulting and legal	382	127
Accrued other	6	11
Accrued expenses	$ 1,895	$ 781

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Fair Value Measurements of Financial Measurements - Summary of Fair Value of Financial Assets by Level within Fair Value Hierarchy (Details) - Fair Value Measurements Recurring $ in Thousands	Dec. 31, 2022 USD ($)
Financial Assets:
Total Financial Assets	$ 3,975
Money Market Funds
Financial Assets:
Cash equivalents, Fair value disclosure	3,975
Level 1
Financial Assets:
Total Financial Assets	3,975
Level 1 | Money Market Funds
Financial Assets:
Cash equivalents, Fair value disclosure	$ 3,975

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Fair Value Measurements of Financial Measurements - Additional Information (Details) - Fair Value Measurements Recurring - USD ($)	Sep. 30, 2023	Sep. 30, 2022
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Financial assets, level 1 to level 2 transfer, amount	$ 0	$ 0
Financial assets, level 2 to level 1 transfer, amount	$ 0	$ 0

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Collaboration Agreements - Additional Information (Details)	1 Months Ended	3 Months Ended		9 Months Ended
	Nov. 30, 2017 USD ($) TargetAntigen Milestone	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Number of target antigens against which antibodies are to be identified and selected | TargetAntigen	2
Revenue		$ 20,000	$ 50,000	$ 570,000	$ 50,000
Surface Oncology, Inc.
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Number of target antigens against which antibodies are to be identified and selected | TargetAntigen	2
Upfront payments fee received	$ 250,000
Number of designated milestones | Milestone	4
Revenue				500,000
Surface Oncology, Inc. | Achievement of Milestone Event
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Revenue				$ 500,000

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Commitments and Contingencies - Additional Information (Details) - USD ($)				9 Months Ended
	Oct. 03, 2023	May 25, 2023	Oct. 10, 2022	Sep. 30, 2023	Sep. 30, 2022	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021
Commitments And Contingencies [Line Items]
Nasdaq stock trading price description				In accordance with Nasdaq Listing Rule 5810(c)(3)(A), the Company received a second 180-day compliance period, or until October 9, 2023, to regain compliance with the minimum bid price requirement. The Company did not regain compliance by October 9, 2023 and received a notice from Nasdaq that its stock is subject to delisting. The Company appealed the delisting notice and has received an extension until March 4, 2024 to regain compliance with the minimum bid price requirement, subject to fulfilling its commitments to regain compliance by such date. There can be no assurance that the Company will be able to regain compliance with the Nasdaq minimum bid price requirements or that its common stock will continue to be listed on Nasdaq.
Minimum bid price requirement			$ 1
Minimum bid price requirement threshold consecutive business days to regain compliance			180 days
Minimum stockholders' equity required for listing		$ 2,500,000
Market value of listed securities		35,000,000
Net income from continuing operations related to listing		$ 500,000
Stockholders' equity				$ (3,869,000)	$ 6,318,000	$ (423,000)	$ 2,400,000	$ 5,193,000	$ 10,943,000	$ 16,188,000	$ 7,412,000
Proceeds from issuance of common stock				1,268,000	3,519,000
Stockholder's deficit				3,869,000	$ (6,318,000)	$ 423,000	$ (2,400,000)	(5,193,000)	$ (10,943,000)	$ (16,188,000)	$ (7,412,000)
Accumulated deficit				$ (336,610,000)				$ (319,676,000)
Subsequent Event | Common Stock
Commitments And Contingencies [Line Items]
Proceeds from issuance of common stock	$ 9,600,000

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Leases - Additional Information (Details) - USD ($)	3 Months Ended		9 Months Ended		27 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Oct. 31, 2024
Lessee Lease Description [Line Items]
Lessee operating lease, incremental borrowing rate	7.00%		7.00%
Lessee, operating lease, discount rate, description			The leases do not provide an implicit rate so in determining the present value of lease payments, the Company its incremental borrowing rate for the applicable lease, which was 7.0%.
Future minimum operating leases payment in total	$ 195,626		$ 195,626
Imputed interest	7,760		7,760
Operating lease liability	187,866		187,866
Cash paid for amount included in measurement of lease liabilities			135,434
Lease expense incurred under operating lease	$ 45,144	$ 44,000	$ 135,433	$ 131,000
Forecast
Lessee Lease Description [Line Items]
Monthly rental payments					$ 15,048

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Long-term Debt - Additional Information (Details) - PPP Loan - USD ($)			3 Months Ended		9 Months Ended
	Nov. 08, 2021	May 08, 2020	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Debt Instrument [Line Items]
Amount of loan received		$ 1,133,600
Maturity date	May 08, 2025	May 08, 2022
Debt instrument interest rate	1.00%	1.00%
Payments commencement date		Nov. 08, 2020
Interest expense			$ 336	$ 523	$ 1,141	$ 1,764
CARES Act of 2020 aid forgiveness amount	$ 876,171
Monthly repayment	$ 6,334

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Common Stock Reserved For Issuance - Common Stock Reserved For Potential Future Issuances (Details) - shares	Sep. 30, 2023	Dec. 31, 2022
Class Of Stock [Line Items]
Total shares of common stock reserved	210,812	144,316
Shares Underlying Outstanding Stock Options
Class Of Stock [Line Items]
Total shares of common stock reserved	205,887	118,795
Shares Available For Future Stock Option Grants
Class Of Stock [Line Items]
Total shares of common stock reserved	4,925	25,521

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Stock-Based Compensation - Additional Information (Details) - USD ($)		9 Months Ended		12 Months Ended
	Jan. 01, 2023	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total shares of common stock reserved		210,812		144,316
Weighted-average grant date fair value of stock options granted to employees and directors		$ 4.15	$ 11.94
Aggregate grant date fair value of stock options vested		$ 513,718	$ 604,626
Total unrecognized compensation cost related to stock options granted to employees		$ 572,490		$ 561,198
2018 Omnibus Incentive Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total shares of common stock reserved		28,333
Percentage of total shares of common stock reserved		2.00%
Additional shares of common stock	66,508
2018 Omnibus Incentive Plan | Minimum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Percentage of voting power of all classes of stock to be owned by optionee to determine the exercise price		10.00%
Exercise price as a percentage of fair value of common stock on grant date if optionee owns stock representing more than 10 percent of voting power of all classes of stock		110.00%
Employee Stock Options
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total unrecognized compensation cost related to stock options granted to employees, weighted-average recognition period		2 years 2 months 12 days		2 years 1 month 6 days
Employee Stock Options | 2011 Employee Equity Plan | Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock options granted, expiration year		10 years
Employee Stock Options | 2018 Omnibus Incentive Plan | Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock options granted, expiration year		10 years
Employee Stock Options | 2018 Omnibus Incentive Plan | Maximum | Board of Directors
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period of stock option grants		8 years

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Stock-Based Compensation - Summary of Stock Option Activity and Related Information (Details) - USD ($)	9 Months Ended	12 Months Ended
	Sep. 30, 2023	Dec. 31, 2022
Share-Based Payment Arrangement [Abstract]
Stock Options, Balance	118,795
Stock Options, Granted	91,689
Stock Options, Forfeited	(211)
Stock Options, Expired	(4,386)
Stock Options, Balance	205,887	118,795
Stock Options, Exercisable	95,956
Weighted-Average Exercise Price, Balance	$ 59.68
Weighted-Average Exercise Price, Granted	6.06
Weighted-Average Exercise Price, Forfeited	90.71
Weighted-Average Exercise Price, Expired	223.6
Weighted-Average Exercise Price, Balance	32.29	$ 59.68
Weighted-Average Exercise Price, Exercisable	$ 56.76
Weighted-Average Remaining Contractual Life (Years), Balance	7 years 10 months 24 days	7 years 1 month 6 days
Weighted-Average Remaining Contractual Life (Years), Exercisable	6 years 4 months 24 days
Aggregate Intrinsic Value, Balance		$ 4

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Stock-Based Compensation - Grant Date Fair Value of Employee Stock Options Estimated Using Black-Scholes Option-Pricing Model with Weighted-Average Assumptions (Details)	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected term (in years)	6 years	6 years
Employee Stock Options
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected volatility	75.00%	75.00%
Risk-free interest rate	3.70%	2.30%

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Stock-Based Compensation - Total Stock-Based Compensation Expense Recognized in Condensed Statements of Operations and Comprehensive Loss (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total stock-based compensation expense	$ 115	$ 134	$ 370	$ 413
Research and Development
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total stock-based compensation expense	48	54	148	152
General and Administrative
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total stock-based compensation expense	$ 67	$ 80	$ 222	$ 261

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Income Taxes - Additional Information (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Income Tax Disclosure [Abstract]
Provision for income taxes	$ 0	$ 0	$ 0	$ 0
Unrecognized tax benefits that would impact effective tax rate	$ 0		$ 0		$ 0

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Net Loss Per Share Attributable to Common Stockholders - Weighted-Average Common Stock Equivalents Excluded from Calculation of Diluted Net Loss Per Share as They Had Anti-Dilutive Effect (Details) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Employee Stock Options
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Weighted-average common stock equivalents excluded from calculation of diluted net loss per share	205,887	115,653	168,539	99,705

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Segment and Geographic Information - Additional Information (Details)	9 Months Ended	12 Months Ended
	Sep. 30, 2023 Segment SegmentManager BusinessActivity	Dec. 31, 2022 Segment
Segment Reporting Information [Line Items]
Number of business activity | BusinessActivity	1
Number of segment managers held accountable for operations or operating results | SegmentManager	0
United States
Segment Reporting Information [Line Items]
Number of reportable segments | Segment	1	1

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Related Party Transactions - Additional Information (Details)								1 Months Ended	3 Months Ended					9 Months Ended
	Oct. 03, 2023 USD ($)	Sep. 20, 2023 USD ($) $ / shares shares	May 12, 2023 USD ($) $ / shares shares	Mar. 30, 2023 USD ($) $ / shares shares	Nov. 22, 2022 USD ($) $ / shares shares	Nov. 18, 2022 USD ($) $ / shares shares	Jan. 31, 2022 USD ($) $ / shares shares	Nov. 30, 2017 TargetAntigen	Sep. 30, 2023 USD ($) $ / shares shares	Jun. 30, 2023 USD ($)	Mar. 31, 2023 USD ($)	Sep. 30, 2022 USD ($)	Mar. 31, 2022 USD ($)	Sep. 30, 2023 USD ($) $ / shares shares	Sep. 30, 2022 USD ($)	Sep. 25, 2023 $ / shares	Dec. 31, 2022 $ / shares shares
Related Party Transaction [Line Items]
Number of target antigens against which antibodies are to be identified and selected | TargetAntigen								2
Lease expense incurred under operating lease									$ 45,144			$ 44,000		$ 135,433	$ 131,000
Revenue									$ 20,000			$ 50,000		570,000	50,000
Gross proceeds from issuance of common stock														$ 1,268,000	$ 3,519,000
Common stock, shares issued | shares									4,858,530					4,858,530			3,325,441
Issuance of Common Shares									$ 1,351,000	$ 4,111,000	$ 2,040,000		$ 13,230,000
Common stock, par value | $ / shares									$ 0.0001					$ 0.0001		$ 0.0001	$ 0.0001
January 2022 Private Placement
Related Party Transaction [Line Items]
Sale of stock, transaction date							Jan. 31, 2022
January 2022 Private Placement | FCMI Parent Co.
Related Party Transaction [Line Items]
Common stock, shares issued | shares							120,120
January 2022 Private Placement | Friedberg Global-Macro Hedge Fund Ltd.
Related Party Transaction [Line Items]
Common stock, shares issued | shares							120,120
January 2022 Private Placement | FCMI Parent Co. and Friedberg Global-Macro Hedge Fund Ltd.
Related Party Transaction [Line Items]
Gross proceeds from issuance of common stock							$ 4,000,000
January 2022 Private Placement | Dr. Maurice Zauderer
Related Party Transaction [Line Items]
Gross proceeds from issuance of common stock							$ 2,000,000
Common stock, shares issued | shares							120,120
January 2022 Private Placement | Board of Directors
Related Party Transaction [Line Items]
Gross proceeds from issuance of common stock							$ 100,000
Common stock, shares issued | shares					368,411	368,411
January 2022 Private Placement | Gerald Van Strydonck
Related Party Transaction [Line Items]
Common stock, shares issued | shares					368,411	368,411
November 2022 Private Placement
Related Party Transaction [Line Items]
Sale of stock, transaction date					Nov. 22, 2022	Nov. 18, 2022
November 2022 Private Placement | Board of Directors
Related Party Transaction [Line Items]
Common stock, shares issued | shares					2.9	2.9	6,006
November 2022 Private Placement | Gerald Van Strydonck
Related Party Transaction [Line Items]
Common stock, shares issued | shares					2.9	2.9
March 2023 Private Placement
Related Party Transaction [Line Items]
Sale of stock, transaction date				Mar. 30, 2023
March 2023 Private Placement | FCMI Parent Co.
Related Party Transaction [Line Items]
Gross proceeds from issuance of common stock				$ 2,000,000
Common stock, shares issued | shares				325,204
March 2023 Private Placement | Vaccinex (Rochester) L.L.C.
Related Party Transaction [Line Items]
Gross proceeds from issuance of common stock				$ 2,000,000
Common stock, shares issued | shares				325,204
May 2023 Private Placement | FCMI Parent Co.
Related Party Transaction [Line Items]
Gross proceeds from issuance of common stock			$ 2,510,000
Common stock, shares issued | shares			447,437
September 2023 Private Placement
Related Party Transaction [Line Items]
Sale of stock, transaction date		Sep. 20, 2023
September 2023 Private Placement | Vaccinex (Rochester) L.L.C.
Related Party Transaction [Line Items]
Gross proceeds from issuance of common stock		$ 320,000
Common stock, shares issued | shares		136,752
Common Stock | Subsequent Event
Related Party Transaction [Line Items]
Gross proceeds from issuance of common stock	$ 9,600,000
Common Stock | January 2022 Private Placement
Related Party Transaction [Line Items]
Aggregate number of shares issued and sell | shares							583,183
Shares issued, price per share | $ / shares							$ 16.65
Gross proceeds from issuance of common stock							$ 9,700,000
Common Stock | November 2022 Private Placement
Related Party Transaction [Line Items]
Aggregate number of shares issued and sell | shares					476,167	476,167
Shares issued, price per share | $ / shares					$ 7.9395	$ 7.9395
Gross proceeds from issuance of common stock					$ 3,800,000	$ 3,800,000
Common Stock | March 2023 Private Placement
Related Party Transaction [Line Items]
Aggregate number of shares issued and sell | shares				331,708
Shares issued, price per share | $ / shares				$ 6.15
Gross proceeds from issuance of common stock				$ 2,040,000.00
Common Stock | May 2023 Private Placement
Related Party Transaction [Line Items]
Aggregate number of shares issued and sell | shares			527,234
Shares issued, price per share | $ / shares			$ 5.6142
Gross proceeds from issuance of common stock			$ 2,960,000
Common Stock | September 2023 Private Placement
Related Party Transaction [Line Items]
Aggregate number of shares issued and sell | shares		248,932
Shares issued, price per share | $ / shares		$ 2.34
Gross proceeds from issuance of common stock		$ 580,000
Surface Oncology, Inc.
Related Party Transaction [Line Items]
Number of target antigens against which antibodies are to be identified and selected | TargetAntigen								2
Revenue														$ 500,000

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Subsequent Events - Additional Information (Details) - USD ($)			9 Months Ended
	Nov. 02, 2023	Oct. 03, 2023	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Subsequent Event [Line Items]
Gross proceeds from issuance of common stock			$ 1,268,000	$ 3,519,000
Common stock sold			4,858,530		3,325,441
Subsequent Event | October 2023 Offering
Subsequent Event [Line Items]
Gross proceeds from issuance of common stock		$ 3,500,000
Subsequent Event | November Warrant Offering
Subsequent Event [Line Items]
Shares issued, price per share	$ 0.125
Gross proceeds from issuance of common stock	$ 17,000
Common stock sold	70,000
FCMI Parent Co. | Subsequent Event | October 2023 Offering
Subsequent Event [Line Items]
Common stock sold		3,000,000
Vaccinex (Rochester) L.L.C. | Subsequent Event | October 2023 Offering
Subsequent Event [Line Items]
Common stock sold		500,000
Vaccinex (Rochester) L.L.C. | Subsequent Event | November Warrant Offering
Subsequent Event [Line Items]
Common stock sold	136,752
Common Warrants | Subsequent Event | October 2023 Offering
Subsequent Event [Line Items]
Gross proceeds from issuance of common stock		$ 9,600,000
Pre-funded Warrants | Subsequent Event | October 2023 Offering
Subsequent Event [Line Items]
Number of shares sold		2,000,000
Shares issued, price per share		$ 0.999
Common Stock | Subsequent Event
Subsequent Event [Line Items]
Gross proceeds from issuance of common stock		$ 9,600,000
Common Stock | Subsequent Event | October 2023 Offering
Subsequent Event [Line Items]
Number of shares sold		7,600,000
Shares issued, price per share		$ 1
Common Stock | Subsequent Event | November Warrant Offering
Subsequent Event [Line Items]
Number of shares sold	527,714
Warrants issued	527,714
Common Stock | Common Warrants | Subsequent Event | October 2023 Offering
Subsequent Event [Line Items]
Warrants issued		7,600,000
Common Stock | Common Warrants | Subsequent Event | October 2023 Offering
Subsequent Event [Line Items]
Warrants issued		2,000,000
Common Stock | Pre-funded Warrants | Subsequent Event | October 2023 Offering
Subsequent Event [Line Items]
Warrants issued		2,000,000