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Twist Bioscience holder proposes $44.7M share sale

Twist Bioscience Corp (TWST) security holder Emily M. Leproust has provided notice under Rule 144 of a proposed sale of up to 295,037 shares of common stock, with an aggregate market value of $44,677,452.91, expected around September 17, 2026 on NASDAQ.

Available on EDGAR Accepted by SEC EDGAR
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Form Type
144

Rhea-AI Filing Summary

Twist Bioscience Corp (TWST) security holder Emily M. Leproust has provided notice under Rule 144 of a proposed sale of up to 295,037 shares of common stock, with an aggregate market value of $44,677,452.91, expected around September 17, 2026 on NASDAQ.

The notice lists these shares as having been acquired through various restricted stock vestings, an ESPP purchase, and a stock option exercise for 208,708 shares. Twist Bioscience Corp reports 62,707,424 common shares outstanding as of September 17, 2026; this is a baseline figure, not the amount being sold.

Shares to be sold under Rule 144 295,037 shares Common stock covered by the Rule 144 notice for sale around September 17, 2026
Aggregate market value of shares to be sold $44,677,452.91 Value of 295,037 Twist Bioscience Corp common shares in the planned Rule 144 sale
Shares outstanding 62,707,424 shares Twist Bioscience Corp common shares outstanding as of September 17, 2026
Stock option exercise shares 208,708 shares Common shares underlying options listed as acquired on September 17, 2026
Sale on August 10, 2026 113,318 shares for $14,183,062.19 Common stock sold by Emily M. Leproust during the past 3 months
Sale on August 25, 2026 41,570 shares for $6,317,760.97 Common stock sold by Emily M. Leproust during the past 3 months
Exchange NASDAQ Planned sales venue for Twist Bioscience Corp common stock
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 | 11/08/2024 | 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.
ESPP Purchase financial
"Common | 02/20/2025 | ESPP Purchase | Issuer"
Stock Option Exercise financial
"Common | 09/17/2026 | Stock Option Exercise | Issuer"
A stock option exercise is the act of using a previously granted right to buy shares of a company's stock at a specific, predetermined price by paying that price and receiving the shares. It matters to investors because exercising changes who owns the shares (which can dilute existing ownership), can trigger taxable events and shift potential gains or losses, and affects voting power and the company’s outstanding share count—like turning a voucher into an actual product that becomes part of circulating supply.
attorney-in-fact regulatory
"as attorney-in-fact for Emily M. Leproust"
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.

FAQ

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

How many TWST shares are covered by Emily M. Leproust’s planned Rule 144 sale?
The notice covers up to 295,037 shares of Twist Bioscience Corp common stock for potential sale under Rule 144, with an approximate aggregate market value of $44,677,452.91, expected around September 17, 2026.

What is the aggregate market value of the TWST shares in this Rule 144 notice?
The aggregate market value of the Twist Bioscience Corp common shares covered is $44,677,452.91, based on the information provided for the 295,037 shares proposed to be sold on or about September 17, 2026.

How many TWST shares are outstanding as referenced in this Rule 144 filing?
Twist Bioscience Corp reports 62,707,424 common shares outstanding as of September 17, 2026. This figure provides a share-count baseline and is not the number of shares being sold under the Rule 144 notice.

What types of transactions generated the TWST shares to be sold under Rule 144?
The shares to be sold were acquired through restricted stock vesting on multiple dates, an ESPP purchase on February 20, 2025 involving 283 shares, and a stock option exercise on September 17, 2026 involving 208,708 shares.

What recent TWST share sales by Emily M. Leproust are disclosed in the past 3 months?
Recent disclosed sales include 113,318 shares sold on August 10, 2026 for $14,183,062.19 and 41,570 shares sold on August 25, 2026 for $6,317,760.97, among several other smaller transactions during June to September 2026.

Who is acting for Emily M. Leproust in connection with the TWST Rule 144 notice?
The notice is signed by /s/ Gary Redman as a duly authorized representative of Fidelity Brokerage Services LLC, acting as attorney-in-fact for Emily M. Leproust.

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

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144: Filer Information

144: Issuer Information

144: Securities Information



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


* 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

144: Remarks and Signature

Source: View Original Filing on SEC EDGAR

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