TWST Form 4: 35,513 PSUs credited; 60% vest by Oct 1, 2026

Rhea-AI Filing Summary

Twist Bioscience (TWST) reported an insider equity award. The company’s SVP of Human Resources acquired 35,513 shares of common stock at $0 on October 28, 2025, tied to Performance Stock Units whose target criteria were met.

Following the transaction, the reporting person beneficially owns 150,191 shares. According to the award terms, 60% of the PSUs remain subject to time-based vesting and will vest on October 1, 2026, contingent on continued service or acceleration as provided in the agreement.

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^*

Green Paula

(Last) (First) (Middle)

C/O TWIST BIOSCIENCE CORPORATION

681 GATEWAY BLVD.

(Street)

SOUTH SAN FRANCISCO CA 94080

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
Twist Bioscience Corp [ TWST ]

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

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	SVP of Human Resources

3. Date of Earliest Transaction (Month/Day/Year)
10/28/2025

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 Stock	10/28/2025		A		35,513(1)	A	$0	150,191	D

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

Explanation of Responses:

1. Represents Performance Stock Units for which target criteria was determined to have been met on October 28, 2025. 60% of the PSUs remain subject to time-based vesting and will vest on October 1, 2026, subject to continued service or acceleration of vesting as provided in the award agreement.

Remarks:

	/s/ Kendra Fox, as Attorney-in-Fact for Paula Green	10/30/2025
	** 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).
** 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 did Twist Bioscience (TWST) disclose in this Form 4?

An officer acquired 35,513 shares at $0 on October 28, 2025 due to PSU performance criteria being met.

Who is the reporting person and their role at TWST?

The reporting person is an Officer, serving as SVP of Human Resources.

How many shares does the officer own after the transaction?

Beneficial ownership stands at 150,191 shares following the reported transaction.

What are the vesting terms for the awarded PSUs?

60% of the PSUs are subject to time-based vesting and will vest on October 1, 2026, subject to continued service or acceleration per the award agreement.

What triggered the share acquisition in this Form 4?

The target criteria for Performance Stock Units were determined to have been met on October 28, 2025.

What is the transaction price listed for the acquired shares?

The shares were recorded at a price of $0, consistent with equity awards that settle upon achieving performance criteria.