Twist Bioscience (TWST) SVP Paula Green sells 1,399 shares to cover RSU taxes

Rhea-AI Filing Summary

Twist Bioscience Corp SVP of Human Resources Paula Green reported an open-market sale of 1,399 shares of common stock at $53.257 per share. According to the footnote, this transaction was a mandated “sell to cover” to satisfy tax withholding obligations tied to vesting Restricted Stock Units, rather than a discretionary trade. After the sale, she directly holds 121,589 shares of Twist Bioscience common stock.

Insights

Insider transactions analyst

Mandated sell-to-cover for taxes, not a discretionary sale.

Paula Green, SVP of Human Resources at Twist Bioscience, reported selling 1,399 common shares at $53.257 per share. The filing states this sale covered tax withholding from vesting Restricted Stock Units, under the company’s equity incentive plan.

This type of “sell to cover” is a routine administrative transaction, executed to meet tax obligations rather than reflect an active decision to reduce equity exposure. Following the sale, Green holds 121,589 shares directly, indicating she retains a substantial position in the company.

Insider Trade Summary

Net Seller: 1,399 shares ($74,507)

Net Sell 1 txn

Insider Green Paula

Role SVP of Human Resources

Sold 1,399 shs ($75K)

Type	Security	Shares	Price	Value
Sale	Common Stock	1,399	$53.257	$75K

Holdings After Transaction: Common Stock — 121,589 shares (Direct, null)

Footnotes (1)

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Key Figures

Shares sold: 1,399 shares Sale price: $53.257 per share Shares held after: 121,589 shares +1 more

4 metrics

Shares sold 1,399 shares Open-market sale on 2026-05-21 to cover taxes

Sale price $53.257 per share Average sale price for 1,399 common shares

Shares held after 121,589 shares Direct ownership after the reported transaction

Net shares sold 1,399 shares Net-sell direction per transaction summary

Key Terms

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

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.

sell to cover financial

"to be 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.

equity incentive plans financial

"the Issuer's election under its equity incentive plans to require"

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.

tax withholding obligations financial

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

Form 4 Insider Transactions: What Each Field Means →

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)
05/21/2026

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	05/21/2026		S		1,399(1)	D	$53.257	121,589	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.

Remarks:

	/s/ Kendra Fox, as Attorney-in-Fact for Paula Green	05/26/2026
	** 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)

FAQ

What did Twist Bioscience (TWST) executive Paula Green report in this Form 4?

Paula Green reported selling 1,399 shares of Twist Bioscience common stock at $53.257 per share. The filing notes this sale was required to cover tax withholding obligations from vesting Restricted Stock Units, rather than a discretionary stock sale.

Why did Paula Green’s Twist Bioscience (TWST) shares get sold in this transaction?

The shares were sold to cover tax withholding obligations arising from the vesting of Restricted Stock Units. The company’s equity incentive plan mandates a “sell to cover” transaction, so this sale was mechanical and not an elective trade by Paula Green.

How many Twist Bioscience (TWST) shares does Paula Green hold after the Form 4 sale?

After the reported transaction, Paula Green directly holds 121,589 shares of Twist Bioscience common stock. This post-transaction balance shows that, despite the tax-related sale, she maintains a significant ongoing equity stake in the company.

Was Paula Green’s Twist Bioscience (TWST) stock sale a discretionary insider sale?

The filing states the sale was not discretionary. It explains the 1,399 shares were sold under a mandated “sell to cover” arrangement to fund tax withholding obligations tied to Restricted Stock Unit vesting, rather than a voluntary decision to sell shares.

What price was received for the Twist Bioscience (TWST) shares sold by Paula Green?

The 1,399 Twist Bioscience common shares were sold at an average price of $53.257 per share. This price reflects the execution level for the tax-related “sell to cover” transaction required under the company’s equity incentive plans.