Twist Bioscience officer plans $222K stock sale

Rhea-AI Filing Summary

Twist Bioscience Corp (TWST) received a Rule 144 notice indicating that officer Dennis H. Cho plans to sell up to 1,598 shares of common stock through Fidelity Brokerage Services LLC, with an indicated aggregate market value of $222,228.11, on or after August 21, 2026, on NASDAQ. The shares relate to restricted stock vesting on August 20, 2026, and the sale includes an amount necessary to cover a tax obligation arising from settlement of a vested equity award.

Over the prior three months, Dennis H. Cho reported multiple sales of Twist Bioscience common stock, including 14,205 shares sold on several dates with proceeds ranging from $874,47.34 to $1,853,098.75, plus smaller sales of hundreds of shares, all disclosed under Rule 144.

Key Figures

Shares to be sold: 1,598 shares of common stock Aggregate market value: $222,228.11 Restricted stock vesting date: 08/20/2026 +3 more

6 metrics

Shares to be sold 1,598 shares of common stock Planned Rule 144 sale through Fidelity Brokerage Services LLC

Aggregate market value $222,228.11 Indicated value for the 1,598 shares to be sold

Restricted stock vesting date 08/20/2026 Source of shares to be sold under Rule 144

Sale on 05/29/2026 14,205 shares for $990,798.75 Past 3-month sale of TWST common stock by Dennis H. Cho

Sale on 06/24/2026 14,205 shares for $1,274,898.75 Past 3-month sale of TWST common stock by Dennis H. Cho

Sale on 08/19/2026 14,205 shares for $1,843,098.75 Most recent past 3-month sale listed

Key Terms

Rule 144, Restricted Stock Vesting, equity award distribution, aggregate market value

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 | 08/20/2026 | 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.

equity award distribution financial

"resulting from the settlement of a vested equity award distribution."

aggregate market value financial

"Common | Fidelity Brokerage Services LLC ... | 1598 | 222228.11"

Aggregate market value is the combined price you would pay to buy all outstanding shares of a company or all companies in a group at current market prices — essentially the sum of each stock’s market capitalization. It matters to investors because it shows the overall size and weight of an investment or sector (like the total cost to buy every piece of a puzzle), helps compare scale across companies or markets, and influences index composition and risk exposure.

FAQ

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

What does the Form 144 filed for TWST disclose about planned sales?

The notice states that officer Dennis H. Cho plans to sell up to 1,598 shares of Twist Bioscience common stock through Fidelity Brokerage Services LLC, tied to restricted stock vesting on August 20, 2026, with indicated aggregate market value of $222,228.11.

Who is the insider involved in the TWST Form 144 and what is their role?

The Form 144 lists Dennis H. Cho as the person for whose account the TWST securities are to be sold, identified as an officer of Twist Bioscience Corp. Sales are being handled by Fidelity Brokerage Services LLC as broker.

How many TWST shares has Dennis H. Cho sold in the past three months?

The filing lists several sales, including 1,642 shares on May 21, 2026; 14,205 shares on May 29, 2026; 402 shares on June 8, 2026; 346 shares on June 22, 2026; 14,205 shares on June 24, 2026; 1,070 shares on August 3, 2026; 14,205 shares on August 5, 2026; and 14,205 shares on August 19, 2026.

What sale proceeds are disclosed for recent TWST stock sales by Dennis H. Cho?

Reported proceeds include $87,447.34 on May 21, 2026; $990,798.75 on May 29, 2026; $28,077.37 on June 8, 2026; $30,213.55 on June 22, 2026; $1,274,898.75 on June 24, 2026; $91,293.68 on August 3, 2026; $1,558,998.75 on August 5, 2026; and $1,843,098.75 on August 19, 2026.

Why does the TWST Form 144 mention taxes in connection with the sale?

The remarks state that the sale includes an amount necessary to cover a tax obligation resulting from the settlement of a vested equity award distribution, indicating that part of the planned sale relates to tax withholding on compensation.

Which broker is handling the TWST shares listed in this Form 144?

The Form 144 identifies Fidelity Brokerage Services LLC, located in Smithfield, Rhode Island, as the broker for the 1,598 shares of Twist Bioscience common stock covered by this notice, to be sold on NASDAQ.

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

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Accepted by SEC EDGAR 08/21/2026 - 03:39 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	1598	222228.11	62707424	08/21/2026	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	08/20/2026	Restricted Stock Vesting	Issuer			1598	08/20/2026	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	05/21/2026	1642	87447.34
Dennis H. Cho 681 Gateway Blvd South San Francisco CA 94080	Common	05/29/2026	14205	990798.75
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

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	08/21/2026
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/Wade Moss, 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)