Which hedge funds own STEM? STEM INC, Q2 2026 13F holders
9 of the hedge funds tracked by WhaleCreep disclosed a position in STEM (STEM INC) in their Q2 2026 13F filings, worth $6.3m in total. The largest holder by portfolio weight is Keyframe Capital Partners, L.P. at 100.0% of its book. 3 managers opened a new position this quarter: Engineers Gate Manager LP, Balyasny Asset Management L.P., Citadel Advisors LLC. 1 exited: Centiva Capital, LP.
Who discovered STEM first?
Earliest meaningful positions among the 11 tracked managers we observed opening STEM since Q2 2021.
1 Hite Hedge Asset Management LLC First reported Q2 2021 2.8%initial weight · $20.0m Exitedby Q2 2024 · held 12q -91%stock since Q2 2021
Weight of Hite Hedge Asset Management LLC's 13F book in STEM, by quarter
- 2.8% peak weight, Q2 2021
- $20.0m peak reported value
- 12 quarters held
- 3q before the median tracked entry
The stock's split-adjusted price moved -91% between Q2 2021 and Q1 2024, the last quarter this manager reported the position.
2 Senator Investment Group LP First reported Q2 2021 1.5%initial weight · $79.2m Exitedby Q1 2022 · held 3q -47%stock since Q2 2021
Weight of Senator Investment Group LP's 13F book in STEM, by quarter
- 1.5% peak weight, Q2 2021
- $79.2m peak reported value
- 3 quarters held
- 3q before the median tracked entry
The stock's split-adjusted price moved -47% between Q2 2021 and Q4 2021, the last quarter this manager reported the position.
7 managers already held STEM when our coverage of them began
Keyframe Capital Partners, L.P. (Q1 2026), Gsa Capital Partners LLP (Q1 2026), Zweig-DiMenna Associates LLC (Q1 2026), Trexquant Investment LP (Q1 2026), Marshall Wace, LLP (Q1 2026), Two Sigma Investments, LP (Q1 2026), Centiva Capital, LP (Q1 2026).
Their first filing on record already includes STEM, so when they first bought it is unknown. They are not ranked above.
View discovery timeline
- Established ownershipQ2 2021 – now11 new tracked holders · 0.8% of tracked managers holding now
Dots mark the ranked managers' first reported quarters. Price is the quarter-end price implied by 13F filings, split-adjusted, shown from Q1 2026 where the series is continuous. Coverage widened in Q1 2026 from about a hundred managers to over a thousand, so holders and new holders are shown relative to the managers filing each quarter.
How this is calculated
13F filings are quarterly snapshots of long US-listed equity positions. They do not show exact purchase dates, intra-quarter trading, short positions, most derivatives, or a manager's actual performance. "First reported" is the first quarter-end filing that shows the position.
A manager is ranked only if we observed it filing, without STEM, within two quarters before its first position. Ranking is by the first quarter the position reached 1% of the manager's 13F book in a run of at least 2 filings, then by peak weight. "High conviction" means a peak weight of at least 5%.
Stock changes are the split-adjusted change in the quarter-end price implied by 13F filings, excluding dividends. They describe the stock over the period, not the return any manager earned. Phases are cut where the share of tracked managers holding STEM passed one third and two thirds of its peak.
Which hedge funds hold STEM? Current holders by portfolio weight
| Manager | As of | Weight of book | Value | Shares | Δ shares | Action |
|---|---|---|---|---|---|---|
| Keyframe Capital Partners, L.P. | Q2 2026 | 100.0% | $202.5k | 25,924 | 0% | held |
| Gsa Capital Partners LLP | Q2 2026 | 0.1% | $799.0k | 102,321 | -6% | reduced |
| Zweig-DiMenna Associates LLC | Q2 2026 | 0.0% | $64.8k | 8,302 | 0% | held |
| Trexquant Investment LP | Q2 2026 | 0.0% | $864.1k | 110,640 | 21% | added |
| Marshall Wace, LLP | Q2 2026 | 0.0% | $3.2m | 405,608 | 39% | added |
| Engineers Gate Manager LP | Q2 2026 | 0.0% | $99.2k | 12,700 | – | new |
| Two Sigma Investments, LP | Q2 2026 | 0.0% | $806.3k | 103,234 | -41% | reduced |
| Balyasny Asset Management L.P. | Q2 2026 | 0.0% | $75.9k | 9,717 | – | new |
| Citadel Advisors LLC | Q2 2026 | 0.0% | $185.3k | 23,727 | – | new |
Exited since the previous quarter
| Manager | Prior weight | Prior value |
|---|---|---|
| Centiva Capital, LP | 0.0% | $132.3k |
Held in a manager's last filing on record
These managers have not filed for the latest quarter; their last disclosure is dated.
| Manager | Last filing | Weight |
|---|---|---|
| renaissance | Q2 2026 | 0.0% |
How has hedge fund ownership of STEM changed?
| Quarter | Managers holding | Combined value |
|---|---|---|
| Q2 2026 | 10 | $6.8m |
| Q1 2026 | 8 | $6.8m |
| Q4 2025 | 2 | $335.6k |
| Q3 2025 | 1 | $917.9k |
| Q1 2025 | 1 | $32.1k |
| Q4 2024 | 1 | $55.2k |
| Q3 2024 | 1 | $31.9k |
| Q2 2024 | 2 | $629.4k |
| Q1 2024 | 4 | $26.0m |
| Q4 2023 | 5 | $32.1m |
| Q3 2023 | 4 | $29.3m |
| Q2 2023 | 3 | $22.8m |
| Q1 2023 | 5 | $20.2m |
| Q4 2022 | 3 | $40.4m |
| Q3 2022 | 4 | $61.1m |
| Q2 2022 | 5 | $40.7m |
Counts every tracked manager that disclosed STEM in that quarter's filing, including managers that have since stopped filing.