Form 4: Twist Bioscience SVP Sells Shares for Tax Obligations

Twist Bioscience's SVP of Human Resources, Paula Green, sold 6,920 shares of common stock to cover tax withholding obligations related to vested Performance Stock Units.

Summary

• Paula Green, SVP of Human Resources at Twist Bioscience Corp (TWST), reported a transaction on October 30, 2025.
• The transaction involved the disposition of 6,920 shares of common stock.
• The shares were sold at a price of $31.4443 per share.
• The sale was mandated to cover tax withholding obligations associated with the vesting of Performance Stock Units (PSUs).
• This was a 'sell to cover' transaction, not a discretionary trade by the reporting person.
• Following the transaction, Paula Green beneficially owns 143,271 shares of common stock directly.
• The 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).

Sentiment

Score: 5

Explanation: The filing reports a routine, non-discretionary 'sell to cover' transaction for tax purposes, which is neutral in terms of company sentiment.

Future Outlook

The filing does not contain any forward-looking statements or guidance regarding the company's future performance or strategic direction.

Management Comments

• The reported sale represents the number of shares required to be sold by the Reporting Person to cover tax withholding obligations in connection with the vesting of Performance Stock Units ('PSUs').
• These sales are mandated by the Issuer's election under its equity incentive plans to require the satisfaction of a tax withholding obligation to be funded by a 'sell to cover' transaction and do not represent discretionary trades by the Reporting Person.

Industry Context

This insider transaction is a routine event related to executive compensation and tax obligations, common across publicly traded companies, and does not reflect broader industry trends or competitive dynamics.

Comparison to Industry Standards

• The 'sell to cover' mechanism for tax withholding on equity awards is a standard practice in corporate compensation plans across various industries, including biotechnology and life sciences, where companies like Twist Bioscience operate.
• Many companies, such as Illumina (ILMN) or Pacific Biosciences of California (PACB), utilize similar equity incentive plans and tax withholding methods for their executives, making this transaction consistent with industry norms for managing vested stock units.

Stakeholder Impact

• Shareholders: Minimal direct impact as this is a routine, non-discretionary transaction for tax purposes, not indicative of management's sentiment towards the company's future.
• Employees: No direct impact beyond the reporting person's individual compensation management.

Key Dates

Keywords

Twist Bioscience, TWST, Insider Trading, Form 4, Stock Sale, Performance Stock Units, Tax Withholding, Equity Compensation, Rule 10b5-1