ZFGN Insider Buying — Recent SEC Form 4 Activity
Track insider buying activity for ZAFGEN, INC. ($ZFGN). See every SEC Form 4 purchase by CEOs, CFOs, directors, and 10% owners over the last 90 days — sourced directly from EDGAR.
In the past 90 days, 4 insiders at ZAFGEN, INC. (ZFGN) made open-market purchases totaling $55,550,000.00. The most recent transaction was on 2026-03-03.
Recent Insider Purchases at ZAFGEN, INC.
| Date | Insider | Shares | Value |
|---|---|---|---|
| 2026-03-03 | Flynn James E | 831,978 | $4,159,890.00 |
| 2026-03-03 | Flynn James E | 1,084,010 | $5,420,050.00 |
| 2026-03-03 | Flynn James E | 1,084,012 | $5,420,060.00 |
| 2026-03-03 | Flynn James E | 2,000,000 | $10,000,000.00 |
| 2026-03-02 | Hamilton Thomas Edward | 100,000 | $500,000.00 |
| 2026-03-02 | THOMAS FRANK E | 5,000 | $25,000.00 |
| 2026-03-02 | SHERMAN JEFFREY W | 5,000 | $25,000.00 |
| 2025-08-04 | Flynn James E | 3,387,529 | $10,840,092.80 |
| 2025-08-04 | Flynn James E | 3,387,539 | $10,840,124.80 |
| 2025-08-04 | Flynn James E | 2,599,932 | $8,319,782.40 |
Top Insiders Buying ZFGN
- $55,000,000.007 purchases
- $500,000.001 purchase
- $25,000.001 purchase
- $25,000.001 purchase
Frequently Asked — ZFGN Insider Buying
What is ZFGN insider buying?
$ZFGN insider buying refers to open-market purchases of ZAFGEN, INC. stock by corporate insiders — officers, directors, and shareholders owning more than 10% of the company. Every purchase is disclosed to the SEC on Form 4 within two business days and is shown on this page.
Why does ZFGN insider activity matter?
Insiders have the best view into ZAFGEN, INC.'s operations. When they buy their own stock with personal money — rather than selling option grants — it signals conviction. Clusters of insider buying (two or more insiders purchasing within 14 days) have historically preceded above-market returns.
Where does this ZFGN insider data come from?
Every transaction on this page is sourced directly from SEC EDGAR Form 4 filings. InsiderAct ingests these filings in near real time and filters for open-market purchases (transaction code P).
How do I get alerts when ZFGN insiders buy?
Add $ZFGN to your InsiderAct watchlist and enable email alerts. You'll be notified when a new Form 4 purchase is filed — usually within hours of the transaction.
What is a "cluster buy" signal?
InsiderAct flags a cluster buy when two or more independent insiders at the same company buy on the open market within a 14-day window. Cluster buys are the highest-conviction insider signal we track.
Related Insider Activity
Other stocks with recent insider buying on SEC Form 4
Want alerts when ZFGN insiders buy?
Add $ZFGN to your watchlist and get notified the moment a new Form 4 is filed.
Data sourced from SEC Form 4 filings via EDGAR. Read more: What is SEC Form 4?