GIM
TGEN

Granahan Investment Management’s Tecogen Inc TGEN Stock Holding History

Granahan Investment Management’s Portfolio TGEN Stock Details TGEN Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		$227K Sell
88,496
-89,326
-50% -$328K 0.01% 149
2025
Q4 		$878K Buy
177,822
+65,484
+58% +$491K 0.04% 148
2025
Q3 		$990K Buy
+112,338
New +$901K 0.04% 138

Other funds holding TGEN

VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
BA
Bard Associates Chicago, Illinois $398M AUM 54.32% 1-Year Est. Return
CHAM
Clear Harbor Asset Management Stamford, Connecticut $1.45B AUM 23.7% 1-Year Est. Return
PCM
Portolan Capital Management Boston, Massachusetts $1.88B AUM 115.74% 1-Year Est. Return
HIM
Herald Investment Management London, United Kingdom $737M AUM 158.15% 1-Year Est. Return
ACM
Arosa Capital Management Miami Beach, Florida $660M AUM 210.26% 1-Year Est. Return
PIP
Palisades Investment Partners Santa Monica, California $255M AUM 50.52% 1-Year Est. Return
UBS Group
UBS Group Zurich, Switzerland $666B AUM 30.12% 1-Year Est. Return
MIM
Meros Investment Management Dallas, Texas $231M AUM 35.94% 1-Year Est. Return
Renaissance Technologies
Renaissance Technologies New York $63.9B AUM 45.56% 1-Year Est. Return

Granahan Investment Management's TGEN Position: Q1 2026 in Review

Granahan Investment Management reduced its Tecogen Inc (TGEN) stake by 50% in Q1 2026, selling an estimated $328K and leaving 88,496 shares worth $227K. The position accounts for 0.01% of the portfolio, ranked #149.

Granahan Investment Management first reported a position in TGEN in Q3 2025 and has held it in 3 quarters since. The position peaked at $990K in Q3 2025. 62 funds tracked by Wall St. Rank hold TGEN as of Q1 2026.

  • Granahan Investment Management held 88,496 shares of Tecogen Inc worth $227K as of Q1 2026.
  • Granahan Investment Management sold 89,326 Tecogen Inc shares in Q1 2026, an estimated $328K.
  • Tecogen Inc made up 0.01% of Granahan Investment Management's portfolio in Q1 2026, its #149 holding.
  • Granahan Investment Management first reported a position in Tecogen Inc in Q3 2025 and has held it in 3 quarters since.
  • Granahan Investment Management's Tecogen Inc position peaked at $990K in Q3 2025.
  • 62 funds tracked by Wall St. Rank held Tecogen Inc as of Q1 2026.

Based on Granahan Investment Management's 13F filing for Q1 2026, filed 15 May 2026.