John Hatsopoulos
CIK 1274775 · Co-Chief Executive Officer · last filed 2026-03-23
"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.
Loading insider history…
Disclosed Exposure
$3.23M
Companies
5
Total Filings
175
Lifetime Open-Market Net
$1.12M
Holdings By Company
Latest on-record share count from this person's most recent non-derivative Form 4 transaction in each company. Disclosed exposure = shares × current underlying price.
| 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 · Page 4 of 18
175 filingsInsider activity across all companies, newest first. Form 4 rows are post-trade confirmations (buys, sells, grants, exercises). Notice (144) rows are pre-trade notices of intent to sell restricted or control stock under Rule 144 — they may not all execute. Compare adjacent dates to see which notices became actual sales.
| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2023-10-13 | TGEN | Buy (P) | +50,000 | $40.0K | EDGAR |
| 2023-10-02 | TGEN | Buy (P) | +2,000 | $2.0K | EDGAR |
| 2023-09-28 | TGEN | Buy (P) | +1,380 | $1.3K | EDGAR |
| 2023-09-27 | TGEN | Mixed | +2,000 | $1.8K | EDGAR |
| 2023-09-19 | TGEN | Buy (P) | +5,000 | $4.5K | EDGAR |
| 2023-09-08 | TGEN | Buy (P) | +200 | $200 | EDGAR |
| 2023-09-06 | TGEN | Buy (P) | +10,000 | $9.7K | EDGAR |
| 2023-08-23 | TGEN | Buy (P) | +5,000 | $5.6K | EDGAR |
| 2023-08-17 | TGEN | Buy (P) | +9,674 | $9.9K | EDGAR |
| 2023-06-27 | TGEN | Buy (P) | +1,000 | $960 | EDGAR |
Form 4 codes: P = open-market purchase · S = open-market sale · A = grant/award · M = option exercise · F = tax withholding at vest · G = bona-fide gift · D = disposition to issuer · J = other (see filing footnote). Only P / S codes carry directional signal.
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.
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.