Generate Biomedicines (GENB) stock: insider trades, news & valuation
Strong buyingShare price and insider trades
Generate Biomedicines insider trading at a glance (Oct 9, 2026): in the past 12 months, 5 insiders bought $150M and 1 sold $16K of GENB stock on the open market, including a cluster buy that began Mar 2, 2026.
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GENB insider buying and selling by quarter
Open-market purchases (green, above the line) and sales (red, below), by trade date.
| Quarter | Bought | Purchases | Sold | Sales |
|---|---|---|---|---|
| Q4 2026 | — | 0 | — | 0 |
| Q3 2026 | — | 0 | $16K | 1 |
| Q2 2026 | — | 0 | — | 0 |
| Q1 2026 | $150M | 12 | — | 0 |
Valuation, profit and volume
Summary
Over the past 12 months, 5 Generate Biomedicines, Inc. insiders reported open-market purchases totaling $150M, while 1 insider reported sales totaling $16K. The most recent cluster buy began on Mar 2, 2026, when 5 insiders bought a combined $150M. 1 of 1 recorded sales were made under pre-scheduled Rule 10b5-1 trading plans, which are usually less informative than discretionary sales.
Insider transactions
Open-market purchases and sales.
| Filed | Insider | Type | Shares | Price | Value | Since | Score |
|---|---|---|---|---|---|---|---|
| Sep 3SEC | Frances ArnoldDirector | Sell Plan | 1,000231,472 held (−0%) | $16.00 | $16K | -10.4% | — |
| Mar 6SEC | Michael NallyCEO | Buy | 20,000572,707 held (+4%) | $12.00 | $240K | +19.5% | — |
| Mar 2SEC | Nutritional Health Ltp Fund General Partner Llc10% Owner | Buy | 1,562,50015,264,724 held (+11%) | $16.00 | $25.0M | -10.4% | — |
| Mar 2SEC | Nutritional Health Ltp Fund General Partner Llc10% Owner | Buy | 1,562,5004,340,252 held (+56%) | $16.00 | $25.0M | -10.4% | — |
| Mar 2SEC | Nutritional Health Ltp Fund General Partner Llc10% Owner | Buy | 1,562,500new position | $16.00 | $25.0M | -10.4% | — |
| Mar 2SEC | Flagship Pioneering Fund Vi, L.P.10% Owner | Buy | 1,562,50015,264,724 held (+11%) | $16.00 | $25.0M | -10.4% | — |
| Mar 2SEC | Flagship Pioneering Fund Vi, L.P.10% Owner | Buy | 1,562,5004,340,252 held (+56%) | $16.00 | $25.0M | -10.4% | — |
| Mar 2SEC | Flagship Pioneering Fund Vi, L.P.10% Owner | Buy | 1,562,500new position | $16.00 | $25.0M | -10.4% | — |
| Mar 2SEC | Jane L MendilloDirector | Buy | 1,500new position | $16.00 | $24K | -10.4% | — |
| Mar 2SEC | Jason SilversCFO, President | Buy | 1,000new position | $16.00 | $16K | -10.4% | — |
| Mar 2SEC | Jason SilversCFO, President | Buy | 500new position | $16.00 | $8K | -10.4% | — |
| Mar 2SEC | Jason SilversCFO, President | Buy | 500new position | $16.00 | $8K | -10.4% | — |
| Mar 2SEC | Beth GrousChief People Officer | Buy | 300new position | $16.00 | $5K | -10.4% | — |
Insiders at Generate Biomedicines, Inc.
| Insider | Bought | Sold | Last filing | Score |
|---|---|---|---|---|
| Nutritional Health Ltp Fund General Partner Llc10% Owner | $75.0M | — | Mar 2, 2026 | — |
| Flagship Pioneering Fund Vi, L.P.10% Owner | $75.0M | — | Mar 2, 2026 | — |
| Michael NallyCEO | $240K | — | Mar 6, 2026 | — |
| Jason SilversCFO, President | $32K | — | Mar 2, 2026 | — |
| Jane L MendilloDirector | $24K | — | Mar 2, 2026 | — |
| Frances ArnoldDirector | — | $16K | Sep 3, 2026 | — |
| Beth GrousChief People Officer | $5K | — | Mar 2, 2026 | — |
GENB stock: common questions
Are Generate Biomedicines, Inc. insiders buying GENB stock?
In the past 12 months, 5 insiders reported open-market purchases of GENB worth $150M. The latest was CEO Michael Nally bought $240K of GENB at $12.00 — first open-market purchase in our records.
Are Generate Biomedicines, Inc. insiders selling GENB stock?
1 insiders reported sales worth $16K over the same period.
Where does this data come from?
Every transaction comes from Form 4 filings that insiders must submit to the SEC within two business days of a trade. We pull them from SEC EDGAR every night.
What is GENB's 52-week range?
Over the past year GENB has traded between $11.21 and $20.38. It last closed at $14.34 on Oct 9, 2026.