John Hatsopoulos
CIK 1274775 · Co-Chief Executive Officer · last filed 2026-03-23
John Hatsopoulos is a Co-Chief Executive Officer who has filed 175 SEC Form 4 insider transactions across 5 companies since 2008. The most recent filing shows the insider exercised options covering $44.0K of TGEN on Mar 23, 2026. Across all open-market trades the lifetime net is +$1.1M, making them a net buyer over the disclosed history. Current disclosed insider exposure totals $3.2M across reported positions.
"Disclosed insider exposure" sums this person's most-recently-reported share counts across each company they're an insider in, multiplied by the current underlying price. It is not net worth — it misses retail holdings, private investments, real estate, index funds, and any company where the person isn't an SEC-reporting insider. For informational purposes only.
$3.23M
5
175
$1.12M
Holdings By Company
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| TGEN | Director | 1,038,951 | $3.10 | $3.22M | $672.7K | 72 | 2026-03-23 |
| AMERICAN DG ENERGY INC (ADGE) Delisted | Co-Chief Executive Officer | 1,165,946 | — | — | $417.9K | 38 | 2016-05-06 |
| AGENUS INC (AGEND) Delisted | Director | — | — | — | $0 | 1 | 2011-10-05 |
| AGEN | Director | 959 | $6.60 | $6.3K | $27.7K | 22 | 2011-07-06 |
| American CareSource Holdings, Inc. (ANCI) Delisted | Director | 3,333 | — | — | $0 | 2 | 2010-07-22 |
Recent Filings
175 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2026-03-23 | TGEN | Exer (M) | +50,000 | $44.0K | EDGAR |
| 2024-09-27 | TGEN | Buy (P) | +10,000 | $8.4K | EDGAR |
| 2024-09-25 | TGEN | Buy (P) | +10,000 | $8.6K | EDGAR |
| 2024-08-20 | TGEN | Buy (P) | +10,000 | $8.9K | EDGAR |
| 2024-07-12 | TGEN | Buy (P) | +22,466 | $14.6K | EDGAR |
| 2024-05-29 | TGEN | Buy (P) | +10,000 | $8.0K | EDGAR |
| 2024-05-29 | TGEN | Buy (P) | +1,265 | $1.0K | EDGAR |
| 2024-05-28 | TGEN | Buy (P) | +11,935 | $9.5K | EDGAR |
| 2024-05-22 | TGEN | Buy (P) | +13,800 | $10.9K | EDGAR |
| 2024-05-17 | TGEN | Buy (P) | +3,000 | $2.2K | EDGAR |
Notice (144 / 144/A): Form 144 is a notice of intent to sell restricted/control stock under Rule 144, filed before the sale; 144/A is an amendment. Many notices are pre-scheduled under Rule 10b5-1 plans. A Form 4 with code S typically follows within a few days when the planned sale executes; missing follow-up Form 4s suggest the notice was cancelled or modified.