Reporting owner · CIK 0002074096
Lafaille Stephen
SEC Form 4 history across 1 companies, 1 transactions and 1 filings.
VBDVP of Business DevelopmentTECOGEN INC.
Open-market transaction mix—0 buys · 0 sales
Available history · Jun 26, 2026 – Jun 26, 2026
Latest insider transactions
Form 4 filings from available history.| Company | Insider | Activity | Disclosed value | Filed (ET) |
|---|---|---|---|---|
TGENTECOGEN INC. | Lafaille StephenVBD | A · grantAmended filingSEC filing ↗ | $0View disclosure → |
Latest Form 4 facts
Quick context from source filings
Latest open-market transaction
No latest transaction fact is available.
Latest buy
No open-market insider purchase is available.
Latest sale
No open-market insider sale is available.
Monthly open-market activity
Last 1 reported months · purchases and sales
No open-market purchases or sales in this history.
View exact monthly values
| Month | Purchases | Sales | Buy value | Sale value | Net value |
|---|---|---|---|---|---|
| Jun 2026 | 0 | 0 | $0.00 | $0.00 | $0.00 |
Net value is disclosed purchases minus sales, not profit. A dash means the value is unavailable.
Ownership and transaction size
Ownership and ticket size
Average P/S size—
Median P/S size—
Direct1
Indirect0
Jun 26, 2026grant
Filing-only signals
Deterministic matches in this insider's history
No filing-only signal badges matched this history.
Associated companies
Companies in the disclosed reporting history
Open-market buy performance
90-day forward return on this insider's open-market purchases
No open-market purchases in available history
A 90-day purchase return requires an open-market buy. No eligible purchases are recorded in this history.
Disclosed ownership
How reported shareholdings evolved
Non-derivative shares held after reported transactions—not stock prices or a complete portfolio.
1 observations · Jun 26, 2026 – Jun 26, 2026. Window ends at the latest available report, not today.
Selected observation · Jun 26, 202641,389 shares reportedAmended filing
Inspect transaction View exact observations and source transactions
| Transaction date | Shares held after | Filed | Source |
|---|---|---|---|
| Jun 26, 2026 | 41,389 | Sep 8, 2026 | Amended transaction |
Securities and direct/indirect ownership contexts are kept separate and never summed. Joint filings may associate the same disclosed row with multiple owners. Unknown values are omitted, not treated as zero. Lines connect observations for readability; they do not establish holdings between filings, cost basis, or current ownership. Amendments and stock splits require reviewing the source.
Lafaille Stephen Insider Activity FAQ
SEC Form 4 context
Who is Lafaille Stephen?
Lafaille Stephen is a reporting owner in SEC Form 4 filings with reporting owner CIK 0002074096.
Which companies has Lafaille Stephen reported transactions for?
TECOGEN INC.
When was Lafaille Stephen's latest insider buy?
No open-market insider purchase is available for this period.
When was Lafaille Stephen's latest insider sale?
No open-market insider sale is available for this period.
Where can I see the original SEC filings?
Each transaction row links directly to the source SEC filing so the reported Form 4 details can be reviewed.
Are performance metrics included?
The profile shows average and median 90-day stock returns after open-market purchases when price coverage is available. These are unadjusted stock returns, not realized trading gains. Win rates, benchmark-adjusted returns and conviction scores are not calculated.