[Form 4] Seres Therapeutics, Inc. Insider Trading Activity
Filing Impact
Filing Sentiment
Form Type
4
Rhea-AI Filing Summary
Seres Therapeutics officer Brady Kelly reported routine equity compensation activity and a small tax-related sale. On May 15, 2026, Kelly exercised restricted stock units, converting 180 shares in total into common stock at a stated price of $0.00 per share. The filing explains that each restricted stock unit is a right to receive one share of Seres common stock and describes quarterly vesting schedules for grants that began vesting on February 15, 2024 and February 15, 2025. On May 18, 2026, Kelly sold 59 shares of common stock at $7.53 per share, specifically to cover taxes tied to the RSU vesting. Following these transactions, Kelly directly holds 8,562 shares of common stock, indicating that the sale was small relative to the overall position.
Positive
- None.
Negative
- None.
Insider Trade Summary
Net Seller: 59 shares ($444)
Net Sell
4 txns
Insider
Brady Kelly
Role
See Remarks
Sold
59 shs ($444.27)
| Type | Security | Shares | Price | Value |
|---|---|---|---|---|
| Sale | Common Stock | 59 | $7.53 | $444.27 |
| Exercise | Restricted Stock Units | 89 | $0.00 | -- |
| Exercise | Restricted Stock Units | 91 | $0.00 | -- |
| Exercise | Common Stock | 180 | $0.00 | -- |
Holdings After Transaction:
Common Stock — 8,562 shares (Direct, null);
Restricted Stock Units — 269 shares (Direct, null)
Footnotes (1)
- Each restricted stock unit represents a contingent right to receive one share of Issuer common stock. Represents shares sold to cover taxes in connection with the vesting of the restricted stock units. The restricted stock units vested and settled as to 25% of the restricted stock units on February 15, 2024. The remainder of the restricted stock units have vested and settled or will vest and settle in 12 equal quarterly installments thereafter. The restricted stock units have no expiration date. The restricted stock units vested and settled as to 25% of the restricted stock units on February 15, 2025. The remainder of the restricted stock units have vested and settled or will vest and settle in 12 equal quarterly installments thereafter. The restricted stock units have no expiration date.
Key Figures
Shares sold: 59 shares
Sale price: $7.53 per share
Common shares acquired via RSU conversion: 180 shares
+3 more
6 metrics
Shares sold
59 shares
Common stock sold on May 18, 2026 at $7.53 per share
Sale price
$7.53 per share
Price for 59 common shares sold on May 18, 2026
Common shares acquired via RSU conversion
180 shares
Non-derivative acquisitions from RSU exercises on May 15, 2026
Post-transaction holdings
8,562 shares
Total common stock directly held after May 18, 2026 sale
RSU conversion blocks
91 and 89 units
Two derivative RSU transactions converting into common stock on May 15, 2026
Net buy/sell shares
-59 shares
Net selling direction across reported transactions in the Form 4
Key Terms
restricted stock unit, open-market sale, derivative security, vest and settle, +1 more
5 terms
restricted stock unit financial
"Each restricted stock unit represents a contingent right to receive one share of Issuer common stock."
A restricted stock unit is a promise from a company to give an employee shares of stock after certain conditions are met, like staying with the company for a set amount of time. It’s like earning a bonus that turns into company stock once you’ve proven your commitment, making it a way to motivate and reward employees.
open-market sale financial
"transaction_action: open-market sale; transaction_code_description: Sale in open market or private transaction"
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.
derivative security financial
"transaction_code_description: 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.
vest and settle financial
"The restricted stock units vested and settled as to 25% of the restricted stock units on February 15, 2024."
taxes in connection with the vesting financial
"Represents shares sold to cover taxes in connection with the vesting of the restricted stock units."
