Twist Bioscience (TWST) director Chess exercises 18,417 options and sells shares
Rhea-AI Filing Summary
Twist Bioscience Corp director Robert Chess exercised options for 18,417 shares of common stock on August 7, 2026 at an exercise price of $11.89 per share and sold the same 18,417 shares at $110.89 per share. The transactions were effected pursuant to a Rule 10b5-1 trading plan adopted on May 8, 2026. Following these transactions, an entity associated with Chess, the Chess 1997 Trust, held 42,528 shares of common stock indirectly, with Chess and his spouse serving as sole trustees and beneficiaries.
Positive
- None.
Negative
- None.
Insider Trade Summary 10b5-1
Exercise and Sale: 18,417 shares ($1.82M approx. pre-tax spread)
Exercise and Sale
4 txns
Insider
CHESS ROBERT
Role
Director
Sold
18,417 shs ($2.04M)
Approx. gross sale proceeds
$2.04M
Approx. exercise cost
$219K
Approx. pre-tax spread
$1.82M
| Type | Security | Shares | Price | Value |
|---|---|---|---|---|
| Exercise | Stock Option (right to buy) F1, F3 | 18,417 | $0.00 | $0.00 |
| Exercise | Common Stock F1 | 18,417 | $11.89 | $219K |
| Sale | Common Stock F1 | 18,417 | $110.89 | $2.04M |
| holding | Common Stock F2 | -- | -- | -- |
Holdings After Transaction:
Stock Option (right to buy) — 0 shares (Direct);
Common Stock — 21,084 shares (Direct);
Common Stock — 42,528 shares (Indirect, By the Chess 1997 Trust)
Footnotes (3)
- F1. The transactions reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan previously adopted by the Reporting Person on May 8, 2026.
- F2. The Reporting Person and his spouse are the sole trustees and the sole beneficiaries of the Chess 1997 Trust.
- F3. The option is immediately exercisable. 10% of the shares subject to the option vested on September 13, 2018, 15% of the shares subject to the option vested on March 24, 2019, and 1/48th of the shares subject to the option vested on each monthly anniversary thereafter, subject to the Reporting Person's continuous service through each vesting date.
Key Figures
Options Exercised: 18,417 shares
Exercise Price: $11.89 per share
Shares Sold: 18,417 shares
+4 more
7 metrics
Options Exercised
18,417 shares
Stock option for common stock exercised on August 7, 2026
Exercise Price
$11.89 per share
Exercise or conversion price of stock option
Shares Sold
18,417 shares
Common stock sale on August 7, 2026 following option exercise
Sale Price
$110.89 per share
Per-share price for common stock sale
Indirect Holdings
42,528 shares
Common stock held indirectly by the Chess 1997 Trust after transactions
Option Expiration
September 13, 2028
Expiration date of the exercised stock option
10b5-1 Plan Adoption Date
May 8, 2026
Date the Rule 10b5-1 trading plan was adopted
Key Terms
Rule 10b5-1 trading plan, derivative security, indirect ownership, vesting
4 terms
Rule 10b5-1 trading plan regulatory
"transactions were effected pursuant to a Rule 10b5-1 trading plan previously adopted"
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.
derivative security financial
"Exercise or conversion of derivative security"
A derivative security is a financial contract whose value comes from the price or performance of something else, such as a stock, bond, commodity, or market index. For investors it acts like an insurance policy or a wager: it can be used to protect against losses, lock in prices, or amplify gains and losses, so it can change a portfolio’s risk and potential return without owning the underlying asset directly.
indirect ownership financial
"total shares following transaction held indirect by the Chess 1997 Trust"
vesting financial
"shares subject to the option vested on each monthly anniversary thereafter"
Vesting is the process by which you earn full ownership of something, like company stock or a retirement benefit, over time. It’s like earning the right to keep a gift piece by piece the longer you stay with a company, making sure employees stay committed before they receive all the benefits.
AI-generated analysis. How Rhea-AI works. Not financial advice.
FAQ
What did Twist Bioscience (TWST) director Robert Chess report in this Form 4?
Robert Chess reported exercising options for 18,417 TWST shares at $11.89 and selling 18,417 shares at $110.89 on August 7, 2026, all under a Rule 10b5-1 trading plan.
What options did Robert Chess exercise in Twist Bioscience (TWST)?
He exercised a stock option for 18,417 shares of Twist Bioscience common stock at an exercise price of $11.89 per share. The option was immediately exercisable and subject to a detailed vesting schedule through monthly installments.
Were Robert Chess’s Twist Bioscience (TWST) transactions under a 10b5-1 plan?
Yes. The Form 4 states the transactions were effected under a Rule 10b5-1 trading plan that Robert Chess previously adopted on May 8, 2026, indicating they followed a pre-established trading program.