TWST — Emily Leproust files Rule 144 notice including 24,282-share sale (05/26/2026)

Rhea-AI Filing Summary

TWST: Notice of proposed sales under Rule 144 by Emily M. Leproust. The filing lists multiple proposed dispositions of Common Stock by Emily M. Leproust, including a sale of 24,282 shares for $1,580,246.60 on 05/26/2026 and earlier listed transactions in March–May 2026. The filing also notes an option granted 09/29/2017.

Insights

Securities Compliance Counsel

Rule 144 notice lists multiple proposed sales by an officer/director.

The schedule enumerates sale dates and proceeds for transactions in March–May 2026, with the largest listed single trade showing 24,282 shares for $1,580,246.60 on 05/26/2026. The entry "Option Granted - 09/29/2017" appears in the securities-to-be-sold section.

Timing and eligibility under Rule 144 depend on holding periods and volume limits; the filing itself is a notice of proposed sale and does not confirm completion or how proceeds will be used. Subsequent filings may report consummation.

Key Figures

Single-sale largest listed: 24,282 shares Proceeds (single listed): $1,580,246.60 Earlier sale example: 2,423 shares +2 more

5 metrics

Single-sale largest listed 24,282 shares sale dated 05/26/2026

Proceeds (single listed) $1,580,246.60 proceeds reported for 24,282-share sale on 05/26/2026

Earlier sale example 2,423 shares sale dated 03/06/2026 for $112,490.68

Additional listed sale 6,888 shares sale dated 05/21/2026 for $366,831.46

Option grant date 09/29/2017 identified as "Option Granted - 09/29/2017" in securities-to-be-sold section

Key Terms

Form 144, Option Granted, Rule 144

3 terms

Form 144 regulatory

"lists multiple proposed dispositions and proceeds for officer sales"

Form 144 is a document that investors must file with the government when they plan to sell a large number of shares of a company's stock. It helps ensure transparency so everyone knows how many shares are being sold and when, which can impact the stock's price.

Option Granted financial

"entry reads "Option Granted - 09/29/2017" in the securities-to-be-sold section"

Rule 144 regulatory

"implied by the filing type and notice of proposed sale under resale restrictions"

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.

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

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Available on EDGAR 05/27/2026 - 04:27 PM Accepted by SEC EDGAR 05/27/2026 - 04:26 PM Learn about SEC filing dates

FAQ

What does the TWST Form 144 filed by Emily M. Leproust report?

It reports proposed sales of Common Stock by Emily M. Leproust, listing multiple trade dates and dollar amounts. The filing lists transactions from 03/06/2026 through 05/26/2026, including a 24,282-share transaction for $1,580,246.60.

Does the Form 144 confirm the listed sales were completed?

No, Form 144 is a notice of proposed sale under Rule 144 and does not by itself confirm consummation. Completion and transfer would be reported in subsequent filings if required; this filing lists the proposed sale dates and amounts.

What is the largest single transaction shown in the filing for TWST?

The largest single listed transaction is 24,282 shares sold on 05/26/2026 for $1,580,246.60, as shown in the sales table included in the filing excerpt.

What does the entry "Option Granted - 09/29/2017" indicate in the Form 144?

That line identifies the original grant date of the underlying option associated with the securities-to-be-sold. It states an option granted on 09/29/2017 but does not detail remaining option terms in the provided excerpt.

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

144: Issuer Information

Name of Issuer

SEC File Number

Address of Issuer

Phone

Name of Person for Whose Account the Securities are To Be Sold

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

Relationship to Issuer

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	25017	1633407.23	62271314	05/27/2026	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	05/27/2026	Option Granted - 09/29/2017	Issuer			25017	05/27/2026	Cash

* 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
Emily M. Leproust 681 Gateway Blvd South San Francisco CA 94080	Common	03/06/2026	2423	112490.68
Emily M. Leproust 681 Gateway Blvd South San Francisco CA 94080	Common	03/20/2026	1742	76275.91
Emily M. Leproust 681 Gateway Blvd South San Francisco CA 94080	Common	04/21/2026	1610	104664.97
Emily M. Leproust 681 Gateway Blvd South San Francisco CA 94080	Common	04/22/2026	8061	526289.75
Emily M. Leproust 681 Gateway Blvd South San Francisco CA 94080	Common	05/04/2026	5127	293001.90
Emily M. Leproust 681 Gateway Blvd South San Francisco CA 94080	Common	05/21/2026	6888	366831.46
Emily M. Leproust 681 Gateway Blvd South San Francisco CA 94080	Common	05/26/2026	24282	1580246.60

144: Remarks and Signature

Remarks

Date of Notice

Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1

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

ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)