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CIK 0001537435 · Non-accelerated filer<br>Smaller reporting company

TECOGEN INC.

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Ticker
TGEN
Exchange
NYSE
Industry
Air-Cond & Warm Air Heatg Equip & Comm & Indl Refrig Equip
FY end
Dec 31
Incorporated
DE
Entity type
operating
EIN
043536131
Phone
781-466-6400
Business address
76 TREBLE COVE ROAD, BLDG. 1, NORTH BILLERICA, MA, 01862
Former names
TECOGEN INC
Open-market buys, last 90 days
$0
in 0 filings
Open-market sales, last 90 days
$0
in 0 filings

Shares bought or sold at a price by officers, directors and 10% owners (Form 4 codes P and S). Grants, option exercises and tax withholding aren't counted.

Date Insider Transaction Shares Price Value Owned after
2025-06-04 PANORA ROBERT A COO and President Sale −31,000 $5.00 $155K 13,000
2025-06-04 Lafaille Stephen VP of Business Development Option exercise +15,000 $0.71 $11K 15,400
2025-06-04 Lafaille Stephen VP of Business Development Sale −15,000 $5.00 $75K 400
2025-06-04 Lafaille Stephen VP of Business Development Option exercise · Stock Options (Right to Buy) −15,000 $0.71 $11K 25,000
2025-06-03 PANORA ROBERT A COO and President Sale −26,000 $4.69 $122K 44,000
2025-06-03 Lafaille Stephen VP of Business Development Option exercise +10,000 $0.71 $7K 10,400
2025-06-03 Lafaille Stephen VP of Business Development Sale −10,000 $4.88 $49K 400
2025-06-03 Lafaille Stephen VP of Business Development Option exercise · Stock Options (Right to Buy) −10,000 $0.71 $7K 40,000
2025-05-27 PANORA ROBERT A COO and President Option exercise +70,000 $0.71 $50K 70,000
2025-05-27 PANORA ROBERT A COO and President Option exercise · Stock Options (Right to Buy) −70,000 $0.71 $50K 130,000
2025-05-27 PANORA ROBERT A COO and President Option exercise · Stock Option (Right to Buy) +70,000 $0.71 $50K 130,000
2025-05-06 LEWIS EARL R Director Option exercise +15,000 $1.75 $26K 982,256
2025-05-06 LEWIS EARL R Director Option exercise +12,500 $1.20 $15K 994,756
2025-05-06 LEWIS EARL R Director Option exercise +6,250 $1.10 $7K 1,001,006
2025-05-01 LEWIS EARL R Director Other acquisition +240,256 $2.14 $514K 967,256
2025-03-03 Lafaille Stephen VP of Business Development Purchase +400 $2.50 $1K 400
2024-11-22 LEWIS EARL R Director Option exercise +100,000 $0.71 $71K 727,000
2024-11-22 LEWIS EARL R Director Option exercise · Stock Option (Right to Buy) +100,000 $0.71 $71K 100,000
2024-11-22 LEWIS EARL R Director Purchase +100,000 $0.71 $71K 737,000
2024-09-27 HATSOPOULOS JOHN Director Purchase +10,000 $0.84 $8K 988,951

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