Fidelity proposes sale of 10,000 TWST shares (TWST) under Form 144

Rhea-AI Filing Summary

TWST Form 144 reports a proposed resale of 10,000 shares of Common Stock by Fidelity Brokerage Services LLC on 03/17/2026 with an aggregate amount listed as $470,000.00. The filing also shows that Robert B. Chess sold 2,184 shares on 02/13/2026 for $105,401.37. The shares are tied to an option granted 09/13/2018 and the distribution method is listed as Cash.

Insights

Securities Attorney

Form 144 notifies the market of proposed Rule 144 resales by a broker and an individual seller.

Form 144 lists a proposed resale of 10,000 Common shares by Fidelity Brokerage Services LLC on 03/17/2026 with an aggregate figure of $470,000.00. It separately records a sale by Robert B. Chess of 2,184 shares on 02/13/2026 for $105,401.37.

These notices are administrative disclosures required for compliance with Rule 144; cash is shown as the distribution method and the shares are linked to an option granted on 09/13/2018. Subsequent transaction settlement details and any transfer restrictions would appear in later filings or broker records.

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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

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	10000	470000.00	61311704	03/17/2026	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	03/17/2026	Option Granted - 09/13/2018	Issuer			10000	03/17/2026	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
Robert B. Chess 681 Gateway Blvd South San Francisco CA 94080	Common	02/13/2026	2184	105401.37

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)

FAQ

What does TWST's Form 144 list for proposed resale by Fidelity?

The Form 144 lists a proposed resale of 10,000 Common shares by Fidelity Brokerage Services LLC on 03/17/2026, with an aggregate amount shown as $470,000.00 and distribution method listed as Cash.

How many shares did Robert B. Chess sell and when?

The filing reports Robert B. Chess sold 2,184 Common shares on 02/13/2026 for a total of $105,401.37. The sale appears separately from the Fidelity proposed resale.

Are the reported shares connected to any option or grant?

Yes, the Form 144 links the reported shares to an option granted on 09/13/2018. The filing lists the option grant date and shows the distribution method as Cash for the proposed resale.

Does the Form 144 state how proceeds are to be handled?

The filing indicates the distribution method as Cash for the listed resale. It does not purport to describe subsequent uses of proceeds or settlement mechanics beyond the cash distribution method.

Is this Form 144 a completion of sale or a notice of proposed sale?

Form 144 serves as a notice of a proposed resale under Rule 144; the filing lists the proposed sale date of 03/17/2026 for Fidelity and records an earlier sale by Robert B. Chess on 02/13/2026.