Maze exec sells 14,609 shares under 10b5-1 plan
Maze Therapeutics President, R&D & CMO Harold Bernstein executed an option exercise and share sale in a pre-planned transaction.
Rhea-AI Filing Summary
Maze Therapeutics President, R&D & CMO Harold Bernstein executed an option exercise and share sale in a pre-planned transaction. He exercised stock options to acquire 14,609 shares of Common Stock at an exercise price of $10.42 per share and then sold 14,609 shares in open-market trades on the same date.
The sales occurred at weighted average prices of $29.8650 and $30.3369 per share under a Rule 10b5-1 trading plan adopted on September 29, 2025. Following these transactions, he reported holding 0 shares of Common Stock directly and 192,945 stock options (right to buy) outstanding.
Positive
- None.
Negative
- None.
Insider Trade Summary 10b5-1
Exercise and Sale: 14,609 shares ($285K approx. pre-tax spread)
Exercise and Sale
4 txns
Insider
Bernstein Harold
Role
President, R&D & CMO
Sold
14,609 shs ($437K)
Approx. gross sale proceeds
$437K
Approx. exercise cost
$152K
Approx. pre-tax spread
$285K
| Type | Security | Shares | Price | Value |
|---|---|---|---|---|
| Exercise | Stock Option (Right to Buy) | 14,609 | $0.00 | $0.00 |
| Exercise | Common Stock | 14,609 | $10.42 | $152K |
| Sale | Common Stock | 13,409 | $29.865 | $400K |
| Sale | Common Stock | 1,200 | $30.3369 | $36K |
Holdings After Transaction:
Stock Option (Right to Buy) — 192,945 contracts (Direct);
Common Stock — 0 shares (Direct)
Footnotes (4)
- F1. This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on September 29, 2025.
- F2. The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $29.24 to $30.23 per share, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote and in footnote 3 of this Form 4.
- F3. The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $30.24 to $30.42 per share, inclusive.
- F4. The option vested as to 1/4th of the total award on October 3, 2023, and thereafter vested or vests as to 1/48th of the total award on the monthly anniversary thereof, subject to the reporting person's continued service to the Issuer on each vesting date.
Key Figures
Shares sold total: 14,609 shares
Sale price block 1: $30.3369 per share
Sale price block 2: $29.8650 per share
+5 more
8 metrics
Shares sold total
14,609 shares
Common Stock sold in open-market transactions on 2026-07-01
Sale price block 1
$30.3369 per share
Weighted average price for 1,200 shares sold
Sale price block 2
$29.8650 per share
Weighted average price for 13,409 shares sold
Option exercise price
$10.42 per share
Exercise price for 14,609 stock options converted into Common Stock
Options exercised
14,609 options
Stock Option (Right to Buy) exercised on 2026-07-01
Options remaining
192,945 options
Stock Option (Right to Buy) held after derivative transaction
Common shares after
0 shares
Direct Common Stock holdings after transactions
Rule 10b5-1 plan adoption date
September 29, 2025
Date Bernstein adopted pre-planned trading arrangement
Key Terms
Rule 10b5-1 trading plan, weighted average price, Stock Option (Right to Buy), derivative security, +1 more
5 terms
Rule 10b5-1 trading plan regulatory
"This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person"
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.
weighted average price financial
"The reported price in Column 4 is a weighted average price."
Weighted average price is the average price of a security where each trade or component is counted according to its size, so bigger trades pull the average more than smaller ones. Think of it like calculating the average cost of a grocery haul where items you bought more of have greater influence on the final per-item cost. Investors use it to understand the true average price paid or received, judge execution quality, and compare trading performance against market movement.
Stock Option (Right to Buy) financial
"security_title: "Stock Option (Right to Buy)""
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.
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.
AI-generated analysis. How Rhea-AI works. Not financial advice.
