Security key
87876P201
TECOGEN INC. - Common Stock, $0.001 par value (TGEN)
CUSIP: 87876P201
Q4 2025 13F Holders as of 31 Dec 2025
- Security type / class
- Equity / Common Stock, $0.001 par value
- Total 13F shares
- 7,618,774
- Total 13F value
- $37,646,736
- Share change
- -106,116
- Put/Call ratio
- 39%
- SEC-reported price per share
- $4.94
- Number of holders
- 65
- Value change
- -$3,776,667
- Number of buys
- 36
- Number of sells
- 35
- Shares outstanding
- 25,572,222
Holder snapshot
7 signals
Open additional details 1 more signal available
Security identity
Names, identifiers, and filing context for this profile.
1 source field
Report period
Q4 2025
Institutions
65
Top holders
10
TGEN full security history
Ownership snapshot
Full 13F holder table
Newer quarter: Q1 2026
Previous quarter: Q3 2025
TECOGEN INC. SEC filings
TECOGEN INC. company facts
Broader feeds
Reporting periods
Holder history for CUSIP 87876P201
Recent filing periods:
Ownership snapshot
Top reported holders of TGEN - TECOGEN INC. - Common Stock, $0.001 par value (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
Tryfon Natsis
Disclosed value leader
VANGUARD GROUP INC
Comparable rows
15/15
Latest evidence
30 Sep 2025
13D/G
13F
Lead comparable stake: 1.8%
13D/G row: Tryfon Natsis
Showing 1-6 of 15 holder rows.
Quick read
Tryfon Natsis leads the comparable SEC ownership view at 1.8%.
15 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens Tryfon Natsis's linked filing trail.
Comparable ownership
Top 5
Tryfon Natsis
1.8%
VANGUARD GROUP INC
3.4%
BARD ASSOCIATES INC
2.7%
Clear Harbor Asset Management, LLC
2.4%
Portolan Capital Management, LLC
2.3%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-6 of 15 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| Tryfon Natsis |
13D/G
Tryfon Natsis and Depoina Pantopoulou, as Joint Tenants with the Right of Survivorship
|
1.8%
|
$3,650,179
460,300 shares
|
$0 | 30 Jun 2025 |
| VANGUARD GROUP INC |
13F
Company
|
3.4%
|
$7,668,577
870,440 shares
|
— | 30 Sep 2025 |
| BARD ASSOCIATES INC |
13F
Company
|
2.7%
|
$6,084,283
690,611 shares
|
— | 30 Sep 2025 |
| Clear Harbor Asset Management, LLC |
13F
Company
|
2.4%
|
$5,388,196
611,600 shares
|
— | 30 Sep 2025 |
| Portolan Capital Management, LLC |
13F
Company
|
2.3%
|
$5,249,051
595,806 shares
|
— | 30 Sep 2025 |
| HERALD INVESTMENT MANAGEMENT Ltd |
13F
Company
|
1.7%
|
$3,898,722
446,078 shares
|
— | 30 Sep 2025 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
13F holder rows
Institutional holders as of Q4 2025
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
65
Shares
7,618,774
Rows available
65
| Investor | Option | Weight % | Change % | SEC-reported value | * Price | Shares | Share Change | Activity | Report Period |
|---|
* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.
Compare Q4 2025 vs Q3 2025 Across Filers
Q3 2025 holders
70
Q4 2025 holders
65
Holder diff
-5
| Investor | Q3 2025 Shares | Q4 2025 Shares | Share Diff | Share Chg % | Q3 2025 value | Q4 2025 value | Value change | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend