TGEN Tecogen Inc.

AMEX
$2.94

Tecogen Inc. (TGEN) Hedge Fund Activity

This view isolates hedge funds from the broader institutional ownership shown on the Institutional tab. A pension fund tracking an index may have no view on a stock; when a hedge fund builds or exits a position, that decision can carry information. This page measures those changes. Positions as of June 30, 2026.

Based on quarterly 13F long-equity filings. Changes compare reported quarter-end positions; filings can be reported up to 45 days later and do not represent a fund's complete exposure.

Hedge fund breadth
+25.00
5 buyers / 3 sellers
STRONG BUYING
Funds compared
8
funds with comparable TGEN positions
6 current holders · 5 prior-quarter holders
Net share change
+766.9K
+1.26M added, -492.4K cut
Position activity
3 new 2 increased 1 reduced 2 exited

Most significant moves

Ranked by conviction, not size — how much of the fund's own book the position represents, how far it moved, and what kind of fund made it.

Fund Action Shares changed Change Est. value Portfolio wt. Score
RENAISSANCE TECHNOLOGIES LLC Quant Sold Out -272.3K -100.0% $1.4M 0.0% 60
D. E. Shaw & Co., Inc. Quant New +15.3K — $80.1K 0.0% 58
TWO SIGMA INVESTMENTS, LP Quant Sold Out -67.4K -100.0% $351.9K 0.0% 57
Quadrature Capital Quant New +14.1K — $73.4K 0.0% 52
Portolan Capital Management Long/Short Increased +1.11M +249.7% $5.8M 0.3% 49
Centiva Capital Long/Short Quant New +27.5K — $143.7K 0.0% 48
MARSHALL WACE, LLP Long/Short Reduced -152.7K -73.6% $796.9K 0.0% 44
CITADEL ADVISORS LLC Quant Increased +94.8K +64.3% $494.9K 0.0% 43

Most significant buyers

By move score, not size.

  • D. E. Shaw & Co., Inc. New · +15.3K
  • Quadrature Capital New · +14.1K
  • Portolan Capital Management Increased · +1.11M
  • Centiva Capital New · +27.5K
  • CITADEL ADVISORS LLC Increased · +94.8K

Most significant sellers

By move score, not size.

  • RENAISSANCE TECHNOLOGIES LLC Sold Out · -272.3K
  • TWO SIGMA INVESTMENTS, LP Sold Out · -67.4K
  • MARSHALL WACE, LLP Reduced · -152.7K

Hedge fund positions

Fund Tier Shares Previous Change Change % Portfolio wt. Action Score
RENAISSANCE TECHNOLOGIES LLC 1 0 272.3K -272.3K -100.0% 0.0% Sold Out 60
D. E. Shaw & Co., Inc. 1 15.3K 0 +15.3K — 0.0% New 58
TWO SIGMA INVESTMENTS, LP 2 0 67.4K -67.4K -100.0% 0.0% Sold Out 57
Quadrature Capital 3 14.1K 0 +14.1K — 0.0% New 52
Portolan Capital Management 3 1.6M 443.6K +1.11M +249.7% 0.3% Increased 49
Centiva Capital 4 27.5K 0 +27.5K — 0.0% New 48
MARSHALL WACE, LLP 2 54.8K 207.5K -152.7K -73.6% 0.0% Reduced 44
CITADEL ADVISORS LLC 1 242.3K 147.5K +94.8K +64.3% 0.0% Increased 43

Every fund above opens. Subscribers can see any manager's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.

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Hedge funds are identified from their 13F filings, which are due 45 days after quarter end and cover long U.S.-listed equity positions only. A fund's short book never appears, so a reduced position can mean a changed view or a changed hedge — the filing doesn't say which.