Was Paula Green’s Twist Bioscience (TWST) share sale a discretionary trade?

No, the 291-share sale was not a discretionary trade. It was mandated under Twist Bioscience’s equity incentive plans as a “sell to cover” transaction to satisfy tax withholding obligations arising from the vesting of Restricted Stock Units.

Twist Bioscience (NASDAQ: TWST) SVP sells 291 shares to cover RSU taxes

Filing Impact

(Neutral)

Filing Sentiment

(Negative)

Form Type

Rhea-AI Filing Summary

Twist Bioscience Corp executive Paula Green, SVP of Human Resources, reported a small mandated share sale tied to equity compensation. On June 22, 2026, she sold 291 shares of common stock at $87.3224 per share solely to cover tax withholding on vesting Restricted Stock Units. After this tax-related transaction, she directly held 120,414 shares of Twist Bioscience common stock.

Insider Trade Summary

Net Seller: 291 shares ($25,411)

Net Sell 1 txn

Insider Green Paula

Role SVP of Human Resources

Sold 291 shs ($25K)

Type	Security	Shares	Price	Value
Sale	Common Stock	291	$87.3224	$25K

Holdings After Transaction: Common Stock — 120,414 shares (Direct, null)

Footnotes (1)

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Key Figures

Shares sold: 291 shares Sale price: $87.3224 per share Shares held after: 120,414 shares +1 more

4 metrics

Shares sold 291 shares Open-market sale on June 22, 2026

Sale price $87.3224 per share Average sale price for 291 shares

Shares held after 120,414 shares Direct holdings after transaction

Net shares sold 291 shares Net disposition per transaction summary

Key Terms

Restricted Stock Units, tax withholding obligations, sell to cover, equity incentive plans

4 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.

tax withholding obligations financial

"shares required to be sold ... to cover tax withholding obligations"

sell to cover financial

"funded by a "sell to cover" transaction"

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.

equity incentive plans financial

"mandated by the Issuer's election under its equity incentive plans"

Equity incentive plans are company programs that pay employees, executives, or directors with company stock, stock options, or share units instead of or in addition to cash, aiming to align their interests with shareholders—like giving team members a stake in the house they help build. For investors this matters because such plans can motivate better company performance but also dilute existing ownership and increase reported compensation costs, so they affect future earnings, voting power, and share value.

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Form 4 Insider Transactions: What Each Field Means →

Available on EDGAR 06/24/2026 - 04:05 PM Accepted by SEC EDGAR 06/24/2026 - 04:05 PM

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^*

Green Paula

(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)
	SVP of Human Resources

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
06/22/2026

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)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Stock	06/22/2026		S		291⁽¹⁾	D	$87.3224	120,414	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)
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)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)

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.

Remarks:

	/s/ Judy Yan, as Attorney-in-Fact for Paula Green	06/24/2026
	** 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)

Source: View Original Filing on SEC EDGAR

FAQ

What insider transaction did Twist Bioscience (TWST) report for Paula Green?

Twist Bioscience reported that SVP of Human Resources Paula Green sold 291 shares of common stock. The sale occurred on June 22, 2026, at $87.3224 per share and was executed only to cover taxes owed on recently vested Restricted Stock Units.

How many Twist Bioscience (TWST) shares did Paula Green sell and at what price?

Paula Green sold 291 shares of Twist Bioscience common stock at an average price of $87.3224 per share. This small sale was specifically used to fund required tax withholding tied to equity award vesting, rather than a voluntary portfolio adjustment.

How many Twist Bioscience (TWST) shares does Paula Green hold after this transaction?

Following the tax-related sale, Paula Green directly holds 120,414 shares of Twist Bioscience common stock. This remaining position shows that the 291 shares sold for tax withholding represent only a very small portion of her overall share ownership.

Why did Twist Bioscience (TWST) require a sell-to-cover transaction for Paula Green’s RSUs?

Twist Bioscience’s equity incentive plans require tax withholding on vesting Restricted Stock Units to be funded via a “sell to cover” transaction. As a result, a portion of Paula Green’s vested shares had to be sold automatically to meet the tax obligations.