CRSP insider updates holdings after RSU vest and tax sale

Rhea-AI Filing Summary

CRISPR Therapeutics (CRSP) insider activity: The company’s Chief Executive Officer and Director reported the vesting of 8,334 restricted stock units on 10/13/2025, increasing direct holdings. On 10/14/2025, 4,242 common shares were sold at $66.6 to satisfy tax withholding mandated by the company’s RSU Settlement Policy.

Following these transactions, directly held common shares were 205,096, with an additional 85,662 held indirectly via The Kulkarni 2023 GRAT. The RSU grant was part of a 25,000‑share award vesting in three annual tranches.

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

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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^*

Kulkarni Samarth

(Last) (First) (Middle)

C/O CRISPR THERAPEUTICS

105 WEST FIRST STREET

(Street)

BOSTON MA 02127

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
CRISPR Therapeutics AG [ CRSP ]

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

X	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Chief Executive Officer

3. Date of Earliest Transaction (Month/Day/Year)
10/13/2025

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
Common Shares	10/13/2025		M		8,334	A	(1)	209,338	D
Common Shares	10/14/2025		S		4,242(2)	D	$66.6	205,096	D
Common Shares								85,662	I	The Kulkarni 2023 GRAT

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
Restricted Stock Units	(1)	10/13/2025		M			8,334	(3)	(3)	Common Shares	8,334	(1)	8,333	D

Explanation of Responses:

1. Each restricted stock unit represents a contingent right to receive one share of CRSP Common Shares.

2. Amount reported represents the number of shares required to be sold by the reporting person to cover the tax withholding obligation in connection with the vesting of these restricted stock units. This sale is mandated by the Company's RSU Settlement Policy to fund the tax withholding obligation and does not represent a discretionary trade by the reporting person.

3. This restricted stock unit award was granted on October 13, 2023 with respect to 25,000 Common Shares, with (i) one third of the shares vesting on October 13, 2024, (ii) one third of the shares vesting on October 13, 2025, and (iii) one third of the shares vesting on October 13, 2026.

	/s/ Elizabeth Ryland Waldinger, attorney-in-fact	10/15/2025
	** 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).
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FAQ

What did CRSP’s CEO report in this Form 4?

Vesting of 8,334 restricted stock units on 10/13/2025 and a sale of 4,242 shares on 10/14/2025 to cover taxes.

At what price were CRSP shares sold?

The sale was executed at $66.6 per share on 10/14/2025 to satisfy tax withholding per the company’s RSU Settlement Policy.

How many CRSP shares does the insider own after the transactions?

Directly held common shares were 205,096, with 85,662 shares held indirectly via The Kulkarni 2023 GRAT.

What is the structure of the RSU award?

It was a 25,000‑share RSU grant with one‑third vesting on 10/13/2024, one‑third on 10/13/2025, and one‑third on 10/13/2026.

Were the sales discretionary?

No. The filing states the 4,242‑share sale was mandated by the company’s RSU Settlement Policy to fund tax withholding.

How many RSUs remain after this vesting?

The filing shows 8,333 derivative securities (RSUs) beneficially owned following the reported transactions.