TGEN

Tecogen INC.

Insider trading activity for Tecogen INC., straight from SEC Form 4 filings. Net figures below count open-market buys and sales only — grants, option exercises and tax withholding are excluded because they are compensation, not decisions to trade.

Past 3 months

net buying

Bought(0 · 0 insiders): $0
Sold(0 · 0 insiders): $0

Past 6 months

+$81.1K

net buying

Bought(5 · 3 insiders): $81.1K
Sold(0 · 0 insiders): $0

Past 12 months

+$134K

net buying

Bought(8 · 6 insiders): $134K
Sold(0 · 0 insiders): $0

Transaction history

The 68 most recent Form 4 transactions.

Open in screener →

Insider transactions, newest first: date, security, transaction type, size and a link to the filing each row came from.
Date	Insider	Role	Type	Shares	Price	Value	Δ Own	Filing
Jun 26	Whiting John Kimball IV	General Counsel &…	AGRANT↺	19,342	—	—	+85.5%	Open the original filing on SEC.gov
Jun 26	Lafaille Stephen	VP of Business Developme…	AGRANT↺	29,013	—	—	+234.4%	Open the original filing on SEC.gov
Jun 26	Deschenes Roger P.	Chief Financial Officer	AGRANT↺	29,013	—	—	+54.8%	Open the original filing on SEC.gov
Jun 26	Panora Robert	COO and President	AGRANT↺	9,671	—	—	+15.5%	Open the original filing on SEC.gov
Jun 26	Rangesh Abinand	Chief Executive Officer	AGRANT↺	174,081	—	—	+259.1%	Open the original filing on SEC.gov
Jun 26	Lewis Earl	Director	AGRANT◆	25,000	$5.17	$129.3K	—	Open the original filing on SEC.gov
Jun 26	Hirsch Susan B	Director	AGRANT◆	25,000	$5.17	$129.3K	—	Open the original filing on SEC.gov
Jun 26	Ghoniem Ahmed	Director	AGRANT◆	25,000	$5.17	$129.3K	—	Open the original filing on SEC.gov
Jun 26	Galiteva Angelina	Director	AGRANT◆	25,000	$5.17	$129.3K	—	Open the original filing on SEC.gov
Jun 26	Albertine John M	Director	AGRANT◆	25,000	$5.17	$129.3K	—	Open the original filing on SEC.gov
Apr 24	Ghoniem Ahmed	Director	MEXER◆	12,723	$0.786	$10K	—	Open the original filing on SEC.gov
Apr 24	Ghoniem Ahmed	Director	PBUY★	12,723	$0.786	$10K	—	Open the original filing on SEC.gov
Apr 13	Hirsch Susan B	Director	PBUY	5,000	$3.73	$18.7K	+1.9%	Open the original filing on SEC.gov
Mar 27	Lewis Earl	Director	PBUY	5,000	$2.52	$12.6K	+0.5%	Open the original filing on SEC.gov
Mar 27	Hirsch Susan B	Director	PBUY★	10,000	$2.54	$25.4K	+4.0%	Open the original filing on SEC.gov
Mar 26	Lewis Earl	Director	PBUY★	5,000	$2.88	$14.4K	+0.5%	Open the original filing on SEC.gov
Mar 23	Whiting John Kimball IV	General Counsel &…	PBUY★	10,000	$2.38	$23.8K	+79.3%	Open the original filing on SEC.gov
Mar 20	Rangesh Abinand	Chief Executive Officer	PBUY★	3,000	$2.30	$6.9K	+4.7%	Open the original filing on SEC.gov
Mar 20	Hatsopoulos John	Director	MEXER◆	50,000	$0.88	$44K	—	Open the original filing on SEC.gov
Mar 20	Hatsopoulos John	Director	MEXER	50,000	$0.88	$44K	+5.1%	Open the original filing on SEC.gov
Mar 20	Deschenes Roger P.	CAO	PBUY★	10,000	$2.23	$22.3K	+23.3%	Open the original filing on SEC.gov
Jul 24, 2025	Whiting John Kimball IV	General Counsel &…	AGRANT◆	24,075	$8.35	$201K	—	Open the original filing on SEC.gov
Jul 24, 2025	Whiting John Kimball IV	General Counsel &…	AGRANT	11,976	—	—	+1,883%	Open the original filing on SEC.gov
Jul 24, 2025	Rangesh Abinand	Chief Executive Officer	AGRANT◆	12,048	$8.35	$100.6K	—	Open the original filing on SEC.gov
Jul 24, 2025	Rangesh Abinand	Chief Executive Officer	AGRANT◆	24,075	$8.35	$201K	—	Open the original filing on SEC.gov
Jul 24, 2025	Rangesh Abinand	Chief Executive Officer	AGRANT	53,892	—	—	+523.2%	Open the original filing on SEC.gov
Jul 24, 2025	Lafaille Stephen	VP of Business Developme…	AGRANT◆	24,075	$8.35	$201K	—	Open the original filing on SEC.gov
Jul 24, 2025	Lafaille Stephen	VP of Business Developme…	AGRANT	11,976	—	—	+2,994%	Open the original filing on SEC.gov
Jul 24, 2025	Lewis Earl R	Director	AGRANT◆	25,000	$8.35	$208.8K	—	Open the original filing on SEC.gov
Jul 24, 2025	Hirsch Susan B	Director	AGRANT◆	25,000	$8.35	$208.8K	—	Open the original filing on SEC.gov
Jul 24, 2025	Ghoniem Ahmed	Director	AGRANT◆	25,000	$8.35	$208.8K	—	Open the original filing on SEC.gov
Jul 24, 2025	Galiteva Angelina	Director	AGRANT◆	25,000	$8.35	$208.8K	—	Open the original filing on SEC.gov
Jul 24, 2025	Deschenes Roger P.	CAO	AGRANT◆	12,063	$8.35	$100.7K	—	Open the original filing on SEC.gov
Jul 24, 2025	Deschenes Roger P.	CAO	AGRANT	17,964	—	—	+71.9%	Open the original filing on SEC.gov
Jul 24, 2025	Albertine John M	Director	AGRANT◆	25,000	$8.35	$208.8K	—	Open the original filing on SEC.gov
Jun 24, 2025	Panora Robert A	COO and President	SSELL↺	900	$6.86	$6.2K	-1.4%	Open the original filing on SEC.gov
Jun 23, 2025	Lafaille Stephen	VP of Business Developme…	XXITM◆	10,000	$1.10	$11K	—	Open the original filing on SEC.gov
Jun 23, 2025	Lafaille Stephen	VP of Business Developme…	SSELL	10,000	$7.25	$72.5K	-96.2%	Open the original filing on SEC.gov
Jun 23, 2025	Lafaille Stephen	VP of Business Developme…	XXITM	10,000	$1.10	$11K	+2,500%	Open the original filing on SEC.gov
Jun 23, 2025	Panora Robert A	COO and President	SSELL↺	31,800	$6.36	$202.2K	-33.4%	Open the original filing on SEC.gov
Jun 18, 2025	Panora Robert A	COO and President	SSELL↺	13,000	$5.03	$65.4K	-12.0%	Open the original filing on SEC.gov
Jun 16, 2025	Panora Robert A	COO and President	XXITM	52,500	$1.10	$57.8K	+46.6%	Open the original filing on SEC.gov
Jun 16, 2025	Panora Robert A	COO and President	XXITM	30,000	$0.71	$21.3K	+36.3%	Open the original filing on SEC.gov
Jun 16, 2025	Panora Robert A	COO and President	XXITM	12,723	$0.79	$10.1K	+18.2%	Open the original filing on SEC.gov
Jun 16, 2025	Panora Robert A	COO and President	MEXER◆↺	52,500	$1.10	$57.8K	—	Open the original filing on SEC.gov
Jun 16, 2025	Panora Robert A	COO and President	MEXER◆↺	30,000	$0.71	$21.3K	—	Open the original filing on SEC.gov
Jun 16, 2025	Panora Robert A	COO and President	MEXER◆↺	12,723	$0.786	$10K	—	Open the original filing on SEC.gov
Jun 16, 2025	Panora Robert A	COO and President	MEXER↺	52,500	$1.10	$57.8K	+94.2%	Open the original filing on SEC.gov
Jun 16, 2025	Panora Robert A	COO and President	MEXER↺	30,000	$0.71	$21.3K	+116.6%	Open the original filing on SEC.gov
Jun 16, 2025	Panora Robert A	COO and President	MEXER↺	12,723	$0.786	$10K	+97.9%	Open the original filing on SEC.gov
Jun 6, 2025	Lafaille Stephen	VP of Business Developme…	XXITM◆	25,000	$1.10	$27.5K	—	Open the original filing on SEC.gov
Jun 6, 2025	Lafaille Stephen	VP of Business Developme…	SSELL	25,000	$5.98	$149.5K	-98.4%	Open the original filing on SEC.gov
Jun 6, 2025	Lafaille Stephen	VP of Business Developme…	XXITM	25,000	$1.10	$27.5K	+6,250%	Open the original filing on SEC.gov
Jun 4, 2025	Lafaille Stephen	VP of Business Developme…	XXITM◆	15,000	$0.71	$10.7K	—	Open the original filing on SEC.gov
Jun 4, 2025	Lafaille Stephen	VP of Business Developme…	SSELL	15,000	$5.00	$75K	-97.4%	Open the original filing on SEC.gov
Jun 4, 2025	Lafaille Stephen	VP of Business Developme…	XXITM	15,000	$0.71	$10.7K	+3,750%	Open the original filing on SEC.gov
Jun 4, 2025	Panora Robert A	COO and President	SSELL↺	31,000	$5.00	$155K	-70.5%	Open the original filing on SEC.gov
Jun 3, 2025	Lafaille Stephen	VP of Business Developme…	XXITM◆	10,000	$0.71	$7.1K	—	Open the original filing on SEC.gov
Jun 3, 2025	Lafaille Stephen	VP of Business Developme…	SSELL	10,000	$4.88	$48.8K	-96.2%	Open the original filing on SEC.gov
Jun 3, 2025	Lafaille Stephen	VP of Business Developme…	XXITM	10,000	$0.71	$7.1K	+2,500%	Open the original filing on SEC.gov
Jun 3, 2025	Panora Robert A	COO and President	SSELL↺	26,000	$4.69	$121.9K	-37.1%	Open the original filing on SEC.gov
May 27, 2025	Panora Robert A	COO and President	MEXER◆↺	70,000	$0.71	$49.7K	—	Open the original filing on SEC.gov
May 27, 2025	Panora Robert A	COO and President	MEXER↺	70,000	$0.71	$49.7K	—	Open the original filing on SEC.gov
May 6, 2025	Lewis Earl R	Director	XXITM	6,250	$1.10	$6.9K	+0.6%	Open the original filing on SEC.gov
May 6, 2025	Lewis Earl R	Director	XXITM	12,500	$1.20	$15K	+1.3%	Open the original filing on SEC.gov
May 6, 2025	Lewis Earl R	Director	XXITM	15,000	$1.75	$26.3K	+1.6%	Open the original filing on SEC.gov
May 1, 2025	Lewis Earl R	Director	JOTHER	240,256	$2.14	$514.1K	+33.1%	Open the original filing on SEC.gov
Mar 3, 2025	Lafaille Stephen	VP of Business Developme…	PBUY	400	$2.50	$1K	—	Open the original filing on SEC.gov

AGRANT↺—

Whiting John Kimball IV · General Counsel &…Jun 26

19,342 sh · +85.5% own

AGRANT↺—

Lafaille Stephen · VP of Business…Jun 26

29,013 sh · +234.4% own

AGRANT↺—

Deschenes Roger P. · Chief Financial…Jun 26

29,013 sh · +54.8% own

AGRANT↺—

Panora Robert · COO and PresidentJun 26

9,671 sh · +15.5% own

AGRANT↺—

Rangesh Abinand · Chief Executive…Jun 26

174,081 sh · +259.1% own

AGRANT◆$129.3K

Lewis Earl · DirectorJun 26

25,000 sh @ $5.17

AGRANT◆$129.3K

Hirsch Susan B · DirectorJun 26

25,000 sh @ $5.17

AGRANT◆$129.3K

Ghoniem Ahmed · DirectorJun 26

25,000 sh @ $5.17

AGRANT◆$129.3K

Galiteva Angelina · DirectorJun 26

25,000 sh @ $5.17

AGRANT◆$129.3K

Albertine John M · DirectorJun 26

25,000 sh @ $5.17

MEXER◆$10K

Ghoniem Ahmed · DirectorApr 24

12,723 sh @ $0.786

PBUY★$10K

Ghoniem Ahmed · DirectorApr 24

12,723 sh @ $0.786

PBUY$18.7K

Hirsch Susan B · DirectorApr 13

5,000 sh @ $3.73 · +1.9% own

PBUY$12.6K

Lewis Earl · DirectorMar 27

5,000 sh @ $2.52 · +0.5% own

PBUY★$25.4K

Hirsch Susan B · DirectorMar 27

10,000 sh @ $2.54 · +4.0% own

PBUY★$14.4K

Lewis Earl · DirectorMar 26

5,000 sh @ $2.88 · +0.5% own

PBUY★$23.8K

Whiting John Kimball IV · General Counsel &…Mar 23

10,000 sh @ $2.38 · +79.3% own

PBUY★$6.9K

Rangesh Abinand · Chief Executive…Mar 20

3,000 sh @ $2.30 · +4.7% own

MEXER◆$44K

Hatsopoulos John · DirectorMar 20

50,000 sh @ $0.88

MEXER$44K

Hatsopoulos John · DirectorMar 20

50,000 sh @ $0.88 · +5.1% own

PBUY★$22.3K

Deschenes Roger P. · CAOMar 20

10,000 sh @ $2.23 · +23.3% own

AGRANT◆$201K

Whiting John Kimball IV · General Counsel &…Jul 24, 2025

24,075 sh @ $8.35

AGRANT—

Whiting John Kimball IV · General Counsel &…Jul 24, 2025

11,976 sh · +1,883% own

AGRANT◆$100.6K

Rangesh Abinand · Chief Executive…Jul 24, 2025

12,048 sh @ $8.35

AGRANT◆$201K

Rangesh Abinand · Chief Executive…Jul 24, 2025

24,075 sh @ $8.35

AGRANT—

Rangesh Abinand · Chief Executive…Jul 24, 2025

53,892 sh · +523.2% own

AGRANT◆$201K

Lafaille Stephen · VP of Business…Jul 24, 2025

24,075 sh @ $8.35

AGRANT—

Lafaille Stephen · VP of Business…Jul 24, 2025

11,976 sh · +2,994% own

AGRANT◆$208.8K

Lewis Earl R · DirectorJul 24, 2025

25,000 sh @ $8.35

AGRANT◆$208.8K

Hirsch Susan B · DirectorJul 24, 2025

25,000 sh @ $8.35

AGRANT◆$208.8K

Ghoniem Ahmed · DirectorJul 24, 2025

25,000 sh @ $8.35

AGRANT◆$208.8K

Galiteva Angelina · DirectorJul 24, 2025

25,000 sh @ $8.35

AGRANT◆$100.7K

Deschenes Roger P. · CAOJul 24, 2025

12,063 sh @ $8.35

AGRANT—

Deschenes Roger P. · CAOJul 24, 2025

17,964 sh · +71.9% own

AGRANT◆$208.8K

Albertine John M · DirectorJul 24, 2025

25,000 sh @ $8.35

SSELL↺$6.2K

Panora Robert A · COO and PresidentJun 24, 2025

900 sh @ $6.86 · -1.4% own

XXITM◆$11K

Lafaille Stephen · VP of Business…Jun 23, 2025

10,000 sh @ $1.10

SSELL$72.5K

Lafaille Stephen · VP of Business…Jun 23, 2025

10,000 sh @ $7.25 · -96.2% own

XXITM$11K

Lafaille Stephen · VP of Business…Jun 23, 2025

10,000 sh @ $1.10 · +2,500% own

SSELL↺$202.2K

Panora Robert A · COO and PresidentJun 23, 2025

31,800 sh @ $6.36 · -33.4% own

SSELL↺$65.4K

Panora Robert A · COO and PresidentJun 18, 2025

13,000 sh @ $5.03 · -12.0% own

XXITM$57.8K

Panora Robert A · COO and PresidentJun 16, 2025

52,500 sh @ $1.10 · +46.6% own

XXITM$21.3K

Panora Robert A · COO and PresidentJun 16, 2025

30,000 sh @ $0.71 · +36.3% own

XXITM$10.1K

Panora Robert A · COO and PresidentJun 16, 2025

12,723 sh @ $0.79 · +18.2% own

MEXER◆↺$57.8K

Panora Robert A · COO and PresidentJun 16, 2025

52,500 sh @ $1.10

MEXER◆↺$21.3K

Panora Robert A · COO and PresidentJun 16, 2025

30,000 sh @ $0.71

MEXER◆↺$10K

Panora Robert A · COO and PresidentJun 16, 2025

12,723 sh @ $0.786

MEXER↺$57.8K

Panora Robert A · COO and PresidentJun 16, 2025

52,500 sh @ $1.10 · +94.2% own

MEXER↺$21.3K

Panora Robert A · COO and PresidentJun 16, 2025

30,000 sh @ $0.71 · +116.6% own

MEXER↺$10K

Panora Robert A · COO and PresidentJun 16, 2025

12,723 sh @ $0.786 · +97.9% own

XXITM◆$27.5K

Lafaille Stephen · VP of Business…Jun 6, 2025

25,000 sh @ $1.10

SSELL$149.5K

Lafaille Stephen · VP of Business…Jun 6, 2025

25,000 sh @ $5.98 · -98.4% own

XXITM$27.5K

Lafaille Stephen · VP of Business…Jun 6, 2025

25,000 sh @ $1.10 · +6,250% own

XXITM◆$10.7K

Lafaille Stephen · VP of Business…Jun 4, 2025

15,000 sh @ $0.71

SSELL$75K

Lafaille Stephen · VP of Business…Jun 4, 2025

15,000 sh @ $5.00 · -97.4% own

XXITM$10.7K

Lafaille Stephen · VP of Business…Jun 4, 2025

15,000 sh @ $0.71 · +3,750% own

SSELL↺$155K

Panora Robert A · COO and PresidentJun 4, 2025

31,000 sh @ $5.00 · -70.5% own

XXITM◆$7.1K

Lafaille Stephen · VP of Business…Jun 3, 2025

10,000 sh @ $0.71

SSELL$48.8K

Lafaille Stephen · VP of Business…Jun 3, 2025

10,000 sh @ $4.88 · -96.2% own

XXITM$7.1K

Lafaille Stephen · VP of Business…Jun 3, 2025

10,000 sh @ $0.71 · +2,500% own

SSELL↺$121.9K

Panora Robert A · COO and PresidentJun 3, 2025

26,000 sh @ $4.69 · -37.1% own

MEXER◆↺$49.7K

Panora Robert A · COO and PresidentMay 27, 2025

70,000 sh @ $0.71

MEXER↺$49.7K

Panora Robert A · COO and PresidentMay 27, 2025

70,000 sh @ $0.71

XXITM$6.9K

Lewis Earl R · DirectorMay 6, 2025

6,250 sh @ $1.10 · +0.6% own

XXITM$15K

Lewis Earl R · DirectorMay 6, 2025

12,500 sh @ $1.20 · +1.3% own

XXITM$26.3K

Lewis Earl R · DirectorMay 6, 2025

15,000 sh @ $1.75 · +1.6% own

JOTHER$514.1K

Lewis Earl R · DirectorMay 1, 2025

240,256 sh @ $2.14 · +33.1% own

PBUY$1K

Lafaille Stephen · VP of Business…Mar 3, 2025

400 sh @ $2.50

Filing record

How quickly insiders here report their trades. Section 16 allows two business days from the transaction.

1 of 24 filings we hold was filed after the two-business-day deadline. The furthest past the deadline was 76 business days late.

Form 4 filings made after the two-business-day deadline, with the transaction date, the filing date and the number of business days between them.
Traded	Filed	Insider	Past deadline	Largest line	Source
Mar 3, 2025	Jun 23, 2025	Lafaille StephenVP of Business Development	76days · about 4 months	$149.5K	Filing ↗

Lafaille StephenVP of Business Development

76days · about 4 months

Traded Mar 3, 2025 · filed Jun 23, 2025Filing ↗

Counted in business days from the transaction date, or the deemed execution date where the filing reports one, excluding weekends and federal holidays. How this is measured · All late filings

Insiders at this company

Everyone who has filed a Form 4 for this issuer.