TScan Therapeutics (TCRX) grants officer 100,000 stock options at $1.12

Rhea-AI Filing Summary

TScan Therapeutics, Inc. reported that officer Dworak Leiden received a stock option grant covering 100,000 shares of voting common stock on January 20, 2026. The option has an exercise price of $1.12 per share and was awarded at no cost for the derivative itself. The grant vests 25% of the shares on the one-year anniversary of January 20, 2026, with the remaining shares vesting in equal monthly installments over the next 36 months, conditioned on continued service. Following this award, the reporting person beneficially owns 100,000 derivative securities directly.

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Dworak Leiden

(Last) (First) (Middle)

C/O TSCAN THERAPEUTICS, INC.

830 WINTER STREET

(Street)

WALTHAM MA 02451

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
TScan Therapeutics, Inc. [ TCRX ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	See Remarks

3. Date of Earliest Transaction (Month/Day/Year)
01/20/2026

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Stock Option (Right to Buy)	$1.12	01/20/2026		A		100,000		(1)	01/20/2036	Voting Common Stock	100,000	$0.00	100,000	D

Explanation of Responses:

1. The shares subject to this option shall vest and become exercisable with respect to 25% of the shares on the one-year anniversary of January 20, 2026, with the balance vesting thereafter in equal monthly installments over the next 36 months, subject to the Reporting Person's continued service to the Issuer on each vesting date.

Remarks:

Principal Accounting Officer and Vice President, Finance

	/s/ Zoran Zdraveski, Attorney-in-Fact	01/22/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What insider transaction did TScan Therapeutics (TCRX) report?

TScan Therapeutics reported that officer Dworak Leiden received a grant of 100,000 stock options on January 20, 2026.

What is the exercise price of the new TCRX stock options?

The granted stock options have an exercise price of $1.12 per share for TScan Therapeutics voting common stock.

How do the TScan Therapeutics (TCRX) options vest for this insider?

These options vest 25% on the one-year anniversary of January 20, 2026, with the balance vesting in equal monthly installments over the next 36 months, subject to continued service.

How many derivative securities does the TCRX officer own after this grant?

After the transaction, the reporting officer beneficially owns 100,000 derivative securities (stock options) directly.

What role does the reporting person hold at TScan Therapeutics (TCRX)?

The reporting person is an officer of TScan Therapeutics, with the remarks identifying the role as Principal Accounting Officer and Vice President, Finance.

When do the TScan Therapeutics (TCRX) stock options expire?

The stock options are scheduled to expire on January 20, 2036.