- Quarter end
- 31 Mar 2026
- the date the book describes
- Filed
- 15 May 2026
- latest of these filings; the earliest 13 May 2026
- Managers listing it
- 10
- at least, of 95 tracked, among listed positions
- Comparable managers
- 91
- filed both Q4 2025 and Q1 2026; 1 listed it in both
- Shares listed
- 959,395
- combined, among listed positions
- Reported value
- $14m
- combined, at the quarter end
Among the 91 comparable managers: 9 buyers (opened or added shares) and 1 seller (trimmed or exited), at least, among listed positions. Their net change in shares was +117,862.
Managers listing GENC in Q1 2026
10 of 10 holders
| Action | Filing | |||||
|---|---|---|---|---|---|---|
| Renaissance Technologies LLC | 383,008 | $5.7m | under 0.1% | Added | +39,034 | 14 May 2026 (the filing on sec.gov) |
| GAMCO Investors Inc | 302,200 | $4.5m | under 0.1% | Added | +44,000 | 14 May 2026 (the filing on sec.gov) |
| Arrowstreet Capital LP | 91,998 | $1.4m | under 0.1% | Added | +7,338 | 14 May 2026 (the filing on sec.gov) |
| Marshall Wace LLP | 56,250 | $844k | under 0.1% | Added | +16,933 | 15 May 2026 (the filing on sec.gov) |
| Citadel Advisors LLC | 36,954 | $554k | under 0.1% | Added | +107 | 15 May 2026 (the filing on sec.gov) |
| Acadian Asset Management LLC | 25,153 | $373k | under 0.1% | Added | +19,396 | 13 May 2026 (the filing on sec.gov) |
| Squarepoint Ops LLC | 24,844 | $373k | under 0.1% | Added | +5,869 | 15 May 2026 (the filing on sec.gov) |
| AQR Capital Management LLC | 22,158 | $332k | under 0.1% | Added | +7,524 | 15 May 2026 (the filing on sec.gov) |
| Millennium Management LLC | 16,247 | $244k | under 0.1% | Trimmed | -22,377 | 15 May 2026 (the filing on sec.gov) |
| Fidelity (FMR LLC) | 583 | $9k | under 0.1% | Added | +38 | 15 May 2026 (the filing on sec.gov) |
Largest increases and reductions, by shares
Increases
- GAMCO Investors Incexisting position · 302,200 shares now+44,000
- Renaissance Technologies LLCexisting position · 383,008 shares now+39,034
- Acadian Asset Management LLCexisting position · 25,153 shares now+19,396
- Marshall Wace LLPexisting position · 56,250 shares now+16,933
- AQR Capital Management LLCexisting position · 22,158 shares now+7,524
Reductions
- Millennium Management LLCexisting position · 16,247 shares now-22,377
New positions and exits
New (0)
No new position among listed positions.
Exited (0)
No exit shown by a manager’s own filing.
Ownership over time
Tracked managers listing it, at least.
| Quarter | Holders | Reported value | Buyers | Sellers |
|---|---|---|---|---|
| Q1 2023 | 1 | $2.0m | n.a. | n.a. |
| Q2 2023 | 1 | $2.2m | n.a. | n.a. |
| Q3 2023 | 2 | $3.0m | n.a. | n.a. |
| Q4 2023 | 2 | $3.8m | 2 | 0 |
| Q1 2024 | 2 | $4.0m | 1 | 1 |
| Q2 2024 | 2 | $4.5m | 0 | 2 |
| Q3 2024 | 2 | $4.9m | 1 | 1 |
| Q4 2024 | 2 | $4.2m | 1 | 1 |
| Q1 2025 | 2 | $2.7m | 1 | 1 |
| Q2 2025 | 1 | $3.1m | 1 | 1 |
| Q3 2025 | 1 | $3.1m | 0 | 1 |
| Q4 2025 | 1 | $3.3m | 3 | 7 |
| Q1 2026 | 1 | $4.5m | 9 | 1 |
| Q2 2026 | 1 | $4.5m | 5 | 4 |
Compare with…
Holders over time, buyers and sellers, and the managers holding both, side by side for up to four stocks.
GENC and GE →GENC and LRCX →GENC and GEV →Choose a stock to compare with GENC →
How much of the picture this is
A 13F is a manager’s long US-listed equity book at a quarter end, filed up to 45 days later. It shows no shorts, cash, bonds or performance, and it is never today’s portfolio. Large books are listed to their largest positions, so a manager missing from this table may still hold a small position below that line. These are 95 tracked managers, not the institutional market.
Which funds own GENC, latest filings →Back to the 13F Explorer →