Twist Bioscience COO sells 4,046 shares for taxes

Twist Bioscience Corp (TWST) reported that President and COO Patrick John Finn sold 4,046 shares of common stock on 2026-08-21 at a price of $139.066 per share.

Rhea-AI Filing Summary

Twist Bioscience Corp (TWST) reported that President and COO Patrick John Finn sold 4,046 shares of common stock on 2026-08-21 at a price of $139.066 per share. According to the company’s equity incentive plan, this was a mandatory “sell to cover” transaction to satisfy tax withholding on vested Restricted Stock Units, not a discretionary trade. After this sale, Finn directly held 210,802 shares, including shares previously acquired under Twist Bioscience’s Employee Stock Purchase Plan in transactions exempt under Rule 16b-3(d) and Rule 16b-3(c).

Insider Trade Summary

Net Seller: 4,046 shares

Net Sell 1 txn

Insider Finn Patrick John

Role President and COO

Sold 4,046 shs ($563K)

Type	Security	Shares	Price	Value
Sale	Common Stock F1, F2	4,046	$139.066	$563K

Holdings After Transaction: Common Stock — 210,802 shares (Direct)

Footnotes (2)

1. F1. Represents the number of shares required to be sold by the Reporting Person to cover tax withholding obligations in connection with the vesting of Restricted Stock Units. These sales are mandated by the Issuer's election under its equity incentive plans to require the satisfaction of a tax withholding obligation to be funded by a "sell to cover" transaction and do not represent discretionary trades by the Reporting Person.
2. F2. Includes shares that were acquired under the Issuer's Employee Stock Purchase Plan in a transaction that was exempt under both Rule 16b-3(d) and Rule 16b-3(c).

Key Figures

Shares sold: 4,046 shares Sale price per share: $139.066 per share Shares held after transaction: 210,802 shares

3 metrics

Shares sold 4,046 shares Common Stock sold on 2026-08-21 to cover tax withholding

Sale price per share $139.066 per share Price for the 4,046 shares sold on 2026-08-21

Shares held after transaction 210,802 shares Direct common stock holdings of Patrick John Finn following the sale

Key Terms

Restricted Stock Units, sell to cover, Employee Stock Purchase Plan, Rule 16b-3(d), +1 more

5 terms

Restricted Stock Units financial

"in connection with the vesting of Restricted Stock Units"

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

sell to cover financial

"funded by a "sell to cover" transaction and do not represent"

Sell to cover is when a person who receives company stock through options or awards sells just enough shares immediately to pay required taxes, exercise costs, or fees, keeping the rest. Think of it like cashing part of a bonus to cover the tax bill so you can keep the remainder. For investors, it can create predictable small selling pressure and slightly change the number of shares actually held by insiders without increasing long‑term dilution.

Employee Stock Purchase Plan financial

"shares that were acquired under the Issuer's Employee Stock Purchase Plan"

An employee stock purchase plan is a company program that lets workers buy shares through small payroll deductions, often at a discount to the market price and after a set offering period. Think of it like a workplace savings plan that turns into ownership: it encourages employees to share in the company’s success and can create predictable buying or selling of stock that investors watch because it affects supply, demand and employee incentives.

Rule 16b-3(d) regulatory

"transaction that was exempt under both Rule 16b-3(d) and Rule 16b-3(c)"

Rule 16b-3(d) is a narrow SEC safe-harbor that shields company insiders (officers, directors and large shareholders) from liability for short‑swing profits when their buys or sells of company stock are made under a pre-established, written plan or contract that removes the insider’s ability to time trades. For investors, this matters because it permits predictable, automated insider transactions — like scheduled sales for diversification or payroll withholding — without triggering forced disgorgement, so such planned trades are treated differently from opportunistic insider trading.

Rule 16b-3(c) regulatory

"transaction that was exempt under both Rule 16b-3(d) and Rule 16b-3(c)"

An SEC rule that lets corporate insiders avoid automatic "short‑swing" profit recovery when they buy or sell their company’s stock under a pre‑approved, written plan that meets specific conditions. For investors, it matters because it clarifies when insider trades are treated as routine, reducing legal uncertainty and helping distinguish trades made for ordinary compensation or pre‑planned reasons from those that might signal opportunistic or timely insider advantage.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transaction did TWST report for Patrick John Finn?

Twist Bioscience Corp reported that President and COO Patrick John Finn sold 4,046 shares of common stock on 2026-08-21 at $139.066 per share to cover tax withholding on vesting Restricted Stock Units as a mandated “sell to cover” transaction.

How many TWST shares does Patrick John Finn hold after this transaction?

After the reported transaction, Patrick John Finn directly holds 210,802 shares of Twist Bioscience Corp common stock, which includes shares that were acquired under the company’s Employee Stock Purchase Plan in exempt transactions under Rule 16b-3(d) and Rule 16b-3(c).

Was the August 21, 2026 TWST share sale by Patrick John Finn discretionary?

No. The 4,046-share sale on 2026-08-21 was required to cover tax withholding obligations upon vesting of Restricted Stock Units. The company’s equity incentive plans mandate this type of “sell to cover” transaction, so it was not a discretionary trade by Finn.

What was the sale price for Patrick John Finn’s TWST shares?

The reported sale price for the 4,046 Twist Bioscience Corp shares sold by Patrick John Finn on 2026-08-21 was $139.066 per share, as disclosed in the Form 4 insider transaction data.

Are Employee Stock Purchase Plan shares included in Patrick John Finn’s TWST holdings?

Yes. The 210,802 shares reported as held by Patrick John Finn include shares that were acquired under Twist Bioscience Corp’s Employee Stock Purchase Plan in transactions exempt under Rule 16b-3(d) and Rule 16b-3(c).

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 08/25/2026 - 04:06 PM EDT Accepted by SEC EDGAR 08/25/2026 - 04:05 PM EDT Learn about SEC filing dates

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

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

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^*

Finn Patrick John

(Last) (First) (Middle)

C/O TWIST BIOSCIENCE CORPORATION

681 GATEWAY BLVD.

(Street)

SOUTH SAN FRANCISCO CALIFORNIA 94080

(City) (State) (Zip)

UNITED STATES

(Country)

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)
	President and COO

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
08/21/2026

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

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

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

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	08/21/2026		S(1)		4,046	D	$139.066	210,802(2)	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 the number of shares required to be sold by the Reporting Person to cover tax withholding obligations in connection with the vesting of Restricted Stock Units. These sales are mandated by the Issuer's election under its equity incentive plans to require the satisfaction of a tax withholding obligation to be funded by a "sell to cover" transaction and do not represent discretionary trades by the Reporting Person.

2. Includes shares that were acquired under the Issuer's Employee Stock Purchase Plan in a transaction that was exempt under both Rule 16b-3(d) and Rule 16b-3(c).

Remarks:

	/s/ Kendra Fox, as Attorney-in-Fact for Patrick John Finn	08/25/2026
	** 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.
* Form 4: SEC 1474 (03-26)