Twist Bioscience officer plans sale of 412 shares

Officer Dennis H. Cho filed a Rule 144 notice to sell 412 TWST shares acquired from a recent restricted stock vesting, partly to cover related tax obligations.

Rhea-AI Filing Summary

Twist Bioscience Corp (TWST) received a notice that officer Dennis H. Cho plans to sell 412 shares of its common stock under Rule 144. The shares were acquired on September 4, 2026 through restricted stock vesting as compensation. The notice states the sale includes shares needed to cover a tax obligation from the vested equity award and lists multiple common‑stock sales by Cho during the prior three months.

Key Figures

Shares to be sold: 412 shares Aggregate market value of planned sale: $50,521.05 Shares outstanding: 62,707,424 shares +3 more

6 metrics

Shares to be sold 412 shares Planned Rule 144 sale of Twist Bioscience common stock

Aggregate market value of planned sale $50,521.05 Estimated value of 412 shares to be sold

Shares outstanding 62,707,424 shares Twist Bioscience common stock outstanding referenced in the notice

Prior sale on June 24, 2026 14,205 shares for $1,274,898.75 Common stock sale by Dennis H. Cho during prior three months

Prior sale on August 5, 2026 14,205 shares for $1,558,998.75 Common stock sale by Dennis H. Cho during prior three months

Prior sale on August 19, 2026 14,205 shares for $1,843,098.75 Common stock sale by Dennis H. Cho during prior three months

Key Terms

Rule 144, Restricted Stock Vesting, attorney-in-fact, tax obligation

4 terms

Rule 144 regulatory

"See the definition of "person" in paragraph (a) of Rule 144."

Rule 144 is a U.S. securities regulation that sets conditions under which restricted or insider-held shares can be legally resold to the public, such as required holding periods, availability of public information, limits on how much can be sold at once, and certain filing requirements. For investors it matters because it determines when previously locked-up shares can enter the market — like a release valve that can increase supply, affect share price, and signal insider intent.

Restricted Stock Vesting financial

"Common | 09/04/2026 | Restricted Stock Vesting | Issuer"

Restricted stock vesting is the timetable and conditions under which shares granted to employees or insiders become fully owned and can be sold, typically requiring continued work or meeting performance goals. It matters to investors because large blocks of shares can become tradable at once, which can change share supply and price, and because vesting aligns insiders’ incentives with the company’s long‑term performance—think of it like a timed unlock that both rewards and locks in key people.

attorney-in-fact regulatory

"as attorney-in-fact for Dennis H. Cho"

An attorney-in-fact is the person or entity given legal authority through a power of attorney to act on behalf of another for specific tasks, such as signing documents, voting shares, or handling transactions. For investors, this matters because it lets a trusted representative make timely decisions or complete paperwork when the owner cannot, much like handing keys to someone to run errands on your behalf—so checks on scope and limits of that authority are important.

tax obligation financial

"includes an amount necessary to cover a tax obligation resulting from"

FAQ

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

What did Twist Bioscience (TWST) disclose about Dennis H. Cho in this Form 144?

The filing reports that officer Dennis H. Cho intends to sell 412 shares of Twist Bioscience common stock under Rule 144, with the sale including an amount to cover tax obligations from a recently vested equity award.

How many Twist Bioscience (TWST) shares are covered by this new Rule 144 notice?

The notice covers a planned sale of 412 shares of Twist Bioscience common stock, with an indicated aggregate market value of $50,521.05 and a proposed sale date of September 8, 2026 on the NASDAQ market.

How did Dennis H. Cho acquire the TWST shares to be sold?

The 412 shares to be sold were acquired on September 4, 2026 through Restricted Stock Vesting from the issuer as compensation, according to the securities-to-be-sold section of the notice.

What prior Twist Bioscience (TWST) stock sales by Dennis H. Cho are disclosed?

Over the prior three months, the notice lists several sales of TWST common stock by Dennis H. Cho, including 14,205 shares on June 24, 2026 for $1,274,898.75 and another 14,205 shares on August 19, 2026 for $1,843,098.75.

How many Twist Bioscience (TWST) shares are outstanding as referenced in the Form 144?

The securities information section cites 62,707,424 shares of Twist Bioscience common stock outstanding, used in connection with the Rule 144 calculations for this planned sale.

Who signed the Form 144 relating to Twist Bioscience (TWST)?

The notice is signed by /s/ Gary Redman as a duly authorized representative of Fidelity Brokerage Services LLC, acting as attorney-in-fact for Dennis H. Cho.

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

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Available on EDGAR 09/08/2026 - 03:12 PM EDT Accepted by SEC EDGAR 09/08/2026 - 03:11 PM EDT Learn about SEC filing dates

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0001883451
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	Twist Bioscience Corp
SEC File Number	001-38720
Address of Issuer	681 GATEWAY BLVD. SOUTH SAN FRANCISCO CALIFORNIA 94080
Phone	800-719-0671
Name of Person for Whose Account the Securities are To Be Sold	Cho Dennis
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Officer

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common	Fidelity Brokerage Services LLC 900 Salem Street Smithfield RI 02917	412	50521.05	62707424	09/08/2026	NASDAQ

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common	09/04/2026	Restricted Stock Vesting	Issuer			412	09/04/2026	Compensation

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
Dennis H. Cho 681 Gateway Blvd South San Francisco CA 94080	Common	06/08/2026	402	28077.37
Dennis H. Cho 681 Gateway Blvd South San Francisco CA 94080	Common	06/22/2026	346	30213.55
Dennis H. Cho 681 Gateway Blvd South San Francisco CA 94080	Common	06/24/2026	14205	1274898.75
Dennis H. Cho 681 Gateway Blvd South San Francisco CA 94080	Common	08/03/2026	1070	91293.68
Dennis H. Cho 681 Gateway Blvd South San Francisco CA 94080	Common	08/05/2026	14205	1558998.75
Dennis H. Cho 681 Gateway Blvd South San Francisco CA 94080	Common	08/19/2026	14205	1843098.75
Dennis H. Cho 681 Gateway Blvd South San Francisco CA 94080	Common	08/21/2026	1598	222228.11

144: Remarks and Signature

Remarks	Sale includes an amount necessary to cover a tax obligation resulting from the settlement of a vested equity award distribution.
Date of Notice	09/08/2026
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	/s/ Gary Redman, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Dennis H. Cho
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)