Ranked by reported Q1 2026 13F market value
Share of total reported institutional value in TGEN held by the largest 10 / 25 filers.
| # | Institution | Shares Held | Market Value | QoQ Change | Ownership % | % of Fund |
|---|---|---|---|---|---|---|
| 1 | VANGUARD CAPITAL MANAGEMENT LLC | 770K | $2.0M | β | 2.574% | 0.00% |
| 2 | BARD ASSOCIATES INC | 688K | $1.8M | -0.1% | 2.301% | 0.44% |
| 3 | Clear Harbor Asset Management, LLC | 650K | $1.7M | +6.6% | 2.173% | 0.12% |
| 4 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | 481K | $1.2M | -10.5% | 1.608% | 0.00% |
| 5 | Portolan Capital Management, LLC | 444K | $1.1M | -0.5% | 1.483% | 0.06% |
| 6 | CITADEL ADVISORS LLC | 430K | $1.1M | +179.6% | 1.438% | 0.00% |
| 7 | Herald Investment Management Ltd | 420K | $1.1M | 0.0% | 1.404% | 0.15% |
| 8 | Arosa Capital Management LP | 350K | $896K | 0.0% | 1.170% | 0.26% |
| 9 | Palisades Investment Partners, LLC | 334K | $855K | -14.4% | 1.116% | 0.34% |
| 10 | UBS Group AG | 320K | $819K | +204.7% | 1.069% | 0.00% |
| 11 | Meros Investment Management, LP | 292K | $747K | β | 0.975% | 0.32% |
| 12 | RENAISSANCE TECHNOLOGIES LLC | 272K | $697K | +401.5% | 0.910% | 0.00% |
| 13 | GENDELL JEFFREY L | 246K | $629K | -16.9% | 0.821% | 0.01% |
| 14 | Integrated Wealth Concepts LLC | 218K | $559K | β | 0.730% | 0.00% |
| 15 | MARSHALL WACE, LLP | 207K | $531K | -27.5% | 0.694% | 0.00% |
| 16 | GEODE CAPITAL MANAGEMENT, LLC | 192K | $492K | +7.9% | 0.642% | 0.00% |
| 17 | RAYMOND JAMES FINANCIAL INC | 186K | $476K | +86.3% | 0.621% | 0.00% |
| 18 | BlackRock, Inc. | 185K | $473K | -3.4% | 0.618% | 0.00% |
| 19 | NEW YORK STATE COMMON RETIREMENT FUND | 137K | $351K | 0.0% | 0.459% | 0.00% |
| 20 | HighTower Advisors, LLC | 133K | $340K | 0.0% | 0.443% | 0.00% |
| 21 | THOMPSON DAVIS & CO., INC. | 99K | $253K | -17.8% | 0.331% | 0.17% |
| 22 | VANGUARD FIDUCIARY TRUST CO | 96K | $247K | β | 0.322% | 0.00% |
| 23 | GRANAHAN INVESTMENT MANAGEMENT INC/MA | 88K | $227K | -50.2% | 0.296% | 0.01% |
| 24 | GROUP ONE TRADING, L.P. | 84K | $215K | +48.3% | 0.281% | 0.01% |
| 25 | APIS CAPITAL ADVISORS, LLC | 77K | $197K | β | 0.257% | 0.03% |
denotes a marquee investor (Buffett, Burry, ARK, Tiger Global, Pershing Square, Baupost and other widely-followed managers). β% of Fundβ shows how much of that investorβs total 13F portfolio is invested in TGEN β a direct measure of their conviction.
Filings activity in TGEN during Q1 2026, grouped by how each filer changed its position.
Institutions that opened a new TGEN position in Q1 2026
Institutions that fully closed their TGEN position in Q1 2026
8 quarters of 13F filings Β· Ξ columns show change vs prior quarter
| Quarter | Inst. Holders | Ξ Holders | Ownership % | Ξ Ownership | Total 13F Value | Ξ Value |
|---|---|---|---|---|---|---|
| Q1 2026 | 60 | 9.1% | 12.21% | 10.84 pp | $21M | 47% |
| Q4 2025 | 66 | 5.7% | 23.05% | 20.04 pp | $40M | 47% |
| Q3 2025 | 70 | +126% | 43.09% | +27.77 pp | $74M | +181% |
| Q2 2025 | 31 | +3000% | 15.32% | +15.32 pp | $26M | +93766243% |
| Q1 2025 | 1 | +0.0% | 0.00% | 0.35 pp | $0M | 100% |
| Q2 2021 | 1 | +0.0% | 0.35% | +0.03 pp | $1M | +10% |
| Q1 2021 | 1 | +0.0% | 0.32% | +0.09 pp | $1M | +39% |
| Q4 2020 | 1 | β | 0.23% | β | $0M | β |
Source: SEC 13F institutional filings. Ownership % requires market cap data and will show once linked. Ξ columns compare to the immediately prior filed quarter.
Latest Form 4 transactions by company officers and directors. Insider buys are widely viewed as the highest-conviction signal because executives are risking personal capital.
| Date | Insider | Action | Shares | Price | Value |
|---|---|---|---|---|---|
| Apr 24, 2026 | Ghoniem Ahmed | Buy | 13K | $0.79 | $10K |
| Apr 13, 2026 | Hirsch Susan B | Buy | 5K | $3.73 | $19K |
Quick answers to the most common questions about buying TGEN stock.
Based on Q1 2026 13F filings, institutional ownership of Tecogen Inc. stands at 12.2%, held across 60 reporting institutions.
VANGUARD CAPITAL MANAGEMENT LLC is the largest reported institutional holder of TGEN, with approximately 769,964 shares worth $0.00B as of Q1 2026.
Yes β 3 widely-followed marquee investors appear among the top 25 institutional holders of TGEN, including SUSQUEHANNA INTERNATIONAL GROUP, LLP, CITADEL ADVISORS LLC, RENAISSANCE TECHNOLOGIES LLC.
Our composite Smart Money Score for TGEN is 45 out of 100 (Neutral). It combines net institutional buying activity, ownership shift, marquee investor presence, and holder-count growth.
15 institutions opened new positions in TGEN during Q1 2026, while 21 fully exited. 6 added to existing positions and 39 trimmed.
TGEN institutional ownership fell by 10.84 percentage points quarter-over-quarter, with a net change of -6 holders.
The top 10 institutions account for 59.8% of all reported 13F value in TGEN, and the top 25 account for 90.5%.
All data is sourced from SEC Form 13F filings, which institutional investment managers with at least $100M in assets are required to file each quarter. We process every 13F filing from EDGAR and recompute the aggregates after each cycle. Insider transactions are sourced from Form 4 filings.
Tecogen Inc. (TGEN) Institutional Ownership