Twist Bioscience (TWST) CFO Laponis sells 4,000 shares under 10b5-1 plan

Rhea-AI Filing Summary

Twist Bioscience Corp Chief Financial Officer Adam Laponis reported an open-market sale of common stock. On May 29, 2026, he sold 4,000 shares at a price of $70.00 per share. After the transaction, he directly holds 112,675 common shares. The sale was executed under a previously adopted Rule 10b5-1 trading plan dated May 8, 2025, indicating the trades were pre-scheduled rather than timed at his discretion.

Insider Trade Summary 10b5-1

Net Seller: 4,000 shares ($280,000)

Net Sell 1 txn

Insider Laponis Adam

Role Chief Financial Officer

Sold 4,000 shs ($280K)

Type	Security	Shares	Price	Value
Sale	Common Stock	4,000	$70.00	$280K

Holdings After Transaction: Common Stock — 112,675 shares (Direct, null)

Footnotes (1)

1. [object Object]

Key Figures

Shares sold: 4,000 shares Sale price: $70.00 per share Post-transaction holdings: 112,675 shares +1 more

4 metrics

Shares sold 4,000 shares Open-market sale of common stock on May 29, 2026

Sale price $70.00 per share Price for the 4,000 common shares sold

Post-transaction holdings 112,675 shares Common stock directly owned after the sale

Net shares sold 4,000 shares Net change in position per transaction summary

Key Terms

Rule 10b5-1 trading plan, open-market sale, Form 4, non-derivative

4 terms

Rule 10b5-1 trading plan regulatory

"The transaction reported on this Form 4 is effected pursuant to a Rule 10b5-1 trading plan"

A Rule 10b5-1 trading plan is a pre-arranged schedule that allows company insiders to buy or sell stock at specific times, even if they have inside information. It helps prevent accusations of unfair trading by making these transactions look planned and transparent, rather than sneaky or illegal.

open-market sale financial

"transaction_action: "open-market sale""

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

Form 4 regulatory

"The transaction reported on this Form 4 is effected pursuant to a Rule 10b5-1 trading plan"

Form 4 is a official document that company insiders, such as executives or major shareholders, file with regulators whenever they buy or sell company shares. It provides transparency about how those with inside knowledge are trading, helping investors see if insiders are confident in the company's prospects or may be selling for personal reasons. This information can influence investor decisions by revealing insiders' perspectives on the company's value.

non-derivative financial

"transaction_type: "non-derivative""

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Form 4 Insider Transactions: What Each Field Means →

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

X

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Laponis Adam

(Last) (First) (Middle)

C/O TWIST BIOSCIENCE CORPORATION

681 GATEWAY BLVD

(Street)

SOUTH SAN FRANCISCO CALIFORNIA 94080

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
Twist Bioscience Corp [ TWST ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Chief Financial Officer

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/29/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	05/29/2026		S		4,000(1)	D	$70	112,675	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. The transaction reported on this Form 4 is effected pursuant to a Rule 10b5-1 trading plan previously adopted by the Reporting Person on May 8, 2025.

Remarks:

	/s/ Kendra Fox, as Attorney-in-Fact for Adam Laponis	06/02/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)

FAQ

What insider transaction did Twist Bioscience (TWST) report on this Form 4?

Twist Bioscience reported that CFO Adam Laponis sold 4,000 shares of common stock in an open-market transaction at $70.00 per share, as disclosed in the Form 4 insider trading report.

How many Twist Bioscience (TWST) shares did the CFO sell and at what price?

CFO Adam Laponis sold 4,000 shares of Twist Bioscience common stock at $70.00 per share. This open-market sale is detailed in the Form 4 filing for the May 29, 2026 transaction.

How many Twist Bioscience (TWST) shares does the CFO hold after this sale?

Following the reported sale, CFO Adam Laponis directly holds 112,675 shares of Twist Bioscience common stock. This post-transaction ownership figure is specifically stated in the Form 4 filing.

Was the Twist Bioscience (TWST) CFO sale under a Rule 10b5-1 trading plan?

Yes. The Form 4 notes the transaction was executed under a Rule 10b5-1 trading plan that Adam Laponis adopted on May 8, 2025, indicating the sale was pre-scheduled rather than timed opportunistically.

What type of transaction is reported for Twist Bioscience (TWST) on this Form 4?

The Form 4 reports a non-derivative open-market sale of common stock by CFO Adam Laponis. The transaction code is “S,” which denotes a sale in an open-market or private transaction.