TGEN
Ghoniem Ahmed, TGEN's Director, spent $10K of their own money on 12,723 shares at $1, opening a brand-new position.
+$10K
12,723 sh @ $1
TGEN
TECOGEN INC.
SEC CIK 1537435
$5.67
+51.2% · 90 days
90-day buys
$134K
8 open-market
90-day sells
$0
0 open-market
Net insider flow
+$134K
Net buying
Filings shown
31
Most recent
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At a glance
Over the last 90 days, insiders at TGEN have bought a net $134K of stock (8 open-market buys vs 0 sells).
Largest recent trade: Lafaille Stephen sold $149.5K of TGEN, trimming their stake 98%.
Most active filer: Lafaille Stephen, with 10 transactions among the recent filings shown.
Insider transaction history
Form 4 filings for TGEN, newest firstTGEN
Hirsch Susan B, TGEN's Director, spent $18.7K of their own money on 5,000 shares at $4, growing their stake 2%.
+$18.7K
5,000 sh @ $4
TGEN
Hirsch Susan B, TGEN's Director, spent $25.4K of their own money on 10,000 shares at $3, growing their stake 4%.
+$25.4K
10,000 sh @ $3
TGEN
+$12.6K
5,000 sh @ $3
TGEN
+$14.4K
5,000 sh @ $3
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TGEN
Whiting John Kimball Iv, TGEN's General Counsel &…, spent $23.8K of their own money on 10,000 shares at $2, growing their stake 79%.
+$23.8K
10,000 sh @ $2
TGEN
Deschenes Roger P., TGEN's CAO, spent $22.3K of their own money on 10,000 shares at $2, growing their stake 23%.
+$22.3K
10,000 sh @ $2
TGEN
Rangesh Abinand, TGEN's CEO, spent $6.9K of their own money on 3,000 shares at $2, growing their stake 5%.
+$6.9K
3,000 sh @ $2
TGEN
+$44K
50,000 sh @ $1
TGEN
+$0
11,976 sh
TGEN
+$0
11,976 sh
TGEN
+$0
17,964 sh
TGEN
+$0
53,892 sh
TGEN
+$11K
10,000 sh @ $1
TGEN
−$72.5K
10,000 sh @ $7
TGEN
+$10.1K
12,723 sh @ $1
TGEN
+$21.3K
30,000 sh @ $1
TGEN
+$57.8K
52,500 sh @ $1
TGEN
+$27.5K
25,000 sh @ $1
TGEN
−$149.5K
25,000 sh @ $6
TGEN
+$10.7K
15,000 sh @ $1
TGEN
−$75K
15,000 sh @ $5
TGEN
+$7.1K
10,000 sh @ $1
TGEN
−$48.8K
10,000 sh @ $5
TGEN
+$26.3K
15,000 sh @ $2
TGEN
+$15K
12,500 sh @ $1
TGEN
+$6.9K
6,250 sh @ $1
TGEN
+$514.1K
240,256 sh @ $2
TGEN
Lafaille Stephen, TGEN's VP of Business De…, spent $1K of their own money on 400 shares at $3, opening a brand-new position.
+$1K
400 sh @ $3
TGEN
Lewis Earl R, TGEN's Director, spent $71K of their own money on 100,000 shares at $1, growing their stake 16%.
+$71K
100,000 sh @ $1
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About TGEN insider activity
This page tracks every recent Form 4 filed for TECOGEN INC. with the U.S. Securities and Exchange Commission. Form 4 is the disclosure that company insiders — officers, directors, and holders of more than 10% of the stock — must file within two business days of buying or selling shares.
The summary above nets open-market purchases against open-market sales over the trailing 90 days. Open-market trades (codes P and S) tend to carry the most signal because they reflect a deliberate choice to put money in or take it out, as opposed to routine grants, option exercises, or tax-withholding events. Use the badges on each row to tell them apart, and always confirm details against the original filing before drawing conclusions.
Frequently asked questions
How often is TGEN insider data updated?
Continuously. We read from SEC EDGAR, so new Form 4 filings for TECOGEN INC. usually appear here within minutes of being accepted by the SEC.
What does "net insider flow" mean?
It is the total dollar value of open-market insider purchases minus open-market sales over the last 90 days. A positive number (green) means insiders bought more than they sold; a negative number (red) means the reverse.
Why do some rows show grants or option exercises instead of buys?
Insiders receive stock through compensation as well as buying it outright. Form 4 captures all of these. We label each transaction by its SEC code so you can focus on open-market activity if you prefer.
Is this investment advice?
No. InsiderSource presents public filing data for informational purposes only. Insider activity is one of many factors to consider and is never a recommendation to buy or sell.