Mario Gabelli's TGEN Position Overview
Mario Gabelli (via Gamco Investors, Inc. Et Al) currently holds 40,000 shares of Tecogen Inc. (TGEN) worth $197,600, representing 0.00% of the portfolio. First purchased in 2014-Q2, this long-term strategic position has been held for 29 quarters.
Based on 13F filings, Mario Gabelli has maintained a strategic position in TGEN, demonstrating sustained confidence in this investment. Largest addition occurred in Q2 2025, adding 42,000 shares. Largest reduction occurred in Q3 2020, reducing 46,430 shares.
Analysis based on 13F filings available since 2013 Q2
Mario Gabelli's Tecogen (TGEN) Holding Value Over Time
Track share changes against reported price movement
Quarterly Tecogen (TGEN) Trades by Mario Gabelli
| Report Date | Bought/Sold (Sh.) | % Change | Qtr. End Shares | Reported Price |
|---|---|---|---|---|
| Q3 2025 | -2,000 | Reduce 4.76% | 40,000 | $8.81 |
| Q2 2025 | +42,000 | New Buy | 42,000 | $6.80 |
| Q3 2020 | -46,430 | Sold Out | 0 | $0.00 |
| Q4 2017 | -21,330 | Reduce 31.48% | 46,430 | $2.69 |
| Q2 2017 | +25,760 | Add 61.33% | 67,760 | $3.34 |
| Q1 2017 | -4,000 | Reduce 8.70% | 42,000 | $3.79 |
| Q3 2016 | -3,300 | Reduce 6.69% | 46,000 | $4.15 |
| Q2 2016 | -700 | Reduce 1.40% | 49,300 | $5.09 |
| Q1 2016 | -10,000 | Reduce 16.67% | 50,000 | $3.92 |
| Q4 2015 | -4,000 | Reduce 6.25% | 60,000 | $3.50 |
| Q3 2015 | -1,000 | Reduce 1.54% | 64,000 | $3.45 |
| Q2 2015 | -15,000 | Reduce 18.75% | 65,000 | $4.11 |
| Q1 2015 | -5,000 | Reduce 5.88% | 80,000 | $5.08 |
| Q4 2014 | -11,047 | Reduce 11.50% | 85,000 | $5.22 |
| Q2 2014 | +96,047 | New Buy | 96,047 | $7.99 |
Mario Gabelli's Tecogen Investment FAQs
Mario Gabelli first purchased Tecogen Inc. (TGEN) in Q2 2014, acquiring 96,047 shares, as reported in their 13F filing for that period. Note: Analysis reflects filings available since Q2 2013; earlier records may be incomplete.
Mario Gabelli has held Tecogen Inc. (TGEN) for 29 quarters since Q2 2014.
Mario Gabelli's largest addition to Tecogen Inc. (TGEN) was in Q2 2014, adding 96,047 shares worth $767,000.
According to the latest 13F filing for Q4 2025, Mario Gabelli's firm, Gamco Investors, Inc. Et Al, owns 40,000 shares of Tecogen Inc. (TGEN), valued at approximately $197,600.
As of the Q4 2025 filing, Tecogen Inc. (TGEN) represents approximately 0.00% of Mario Gabelli's publicly disclosed stock portfolio, making it one of their key holdings.
Mario Gabelli's peak holding in Tecogen Inc. (TGEN) was 96,047 shares, as reported at the end of Q2 2014.