Who owns STEM?
Institutional ownership of Stem Inc. from Form 13F, Q2 2026
73 institutional managers reported holding Stem Inc. (STEM) in Form 13F filings for Q2 2026, with 2,203,112 shares worth $17.2M. The largest reported holder was Marshall Wace, LLP. Managers that filed both quarters added a net 238,553 shares (+12.1%). 10 opened new positions and 11 sold out.
- Funds holding
- 73
- Value held
- $17.2M
- New / sold out
- 10 / 11
- Net shares, same filers
- +12.1%
Holdings as of June 30, 2026, the end of Q2 2026. Managers have 45 days after a quarter ends to file Form 13F (by August 14, 2026 for Q2 2026), so positions may have changed since.
Largest holders of STEM
| Fund | Value | Share of 13F holdings | Shares | Move |
|---|---|---|---|---|
| Marshall Wace, LLP | $3.2M | 18.4% | 405,608 | Added |
| Vanguard Capital Management LLC | $2.8M | 16.4% | 361,249 | Added |
| BlackRock, Inc. | $1.3M | 7.5% | 164,477 | Added |
| Trexquant Investment LP | $864K | 5.0% | 110,640 | Added |
| Two Sigma Investments, LP | $806K | 4.7% | 103,234 | Trimmed |
| Gsa Capital Partners LLP | $799K | 4.6% | 102,321 | Trimmed |
| BNP Paribas Financial Markets | $727K | 4.2% | 93,094 | Added |
| Geode Capital Management, LLC | $727K | 4.2% | 93,014 | Added |
| Acadian Asset Management LLC | $579K | 3.4% | 74,646 | Added |
| Renaissance Technologies LLC | $519K | 3.0% | 66,482 | Added |
| Bridgeway Capital Management, LLC | $465K | 2.7% | 59,600 | Trimmed |
| Vanguard Fiduciary Trust Co | $444K | 2.6% | 56,898 | Added |
| Longaeva Partners L.P. | $376K | 2.2% | 48,186 | New |
| State Street Corp | $299K | 1.7% | 38,278 | Unchanged |
| Morgan Stanley | $294K | 1.7% | 37,661 | Trimmed |
| Cohen & Steers, Inc. | $249K | 1.4% | 31,887 | Unchanged |
| Royal Bank of Canada | $231K | 1.3% | 29,636 | Added |
| XTX Topco Ltd | $230K | 1.3% | 29,482 | Added |
| Citigroup Inc | $223K | 1.3% | 28,526 | Trimmed |
| HSBC Holdings PLC | $221K | 1.3% | 28,424 | Unchanged |
| Price T Rowe Associates Inc | $209K | 1.2% | 26,655 | Added |
| Keyframe Capital Partners, L.P. | $202K | 1.2% | 25,924 | Unchanged |
| UBS Group AG | $196K | 1.1% | 25,132 | Trimmed |
| Citadel Advisors LLC | $185K | 1.1% | 23,727 | New |
| Nomura Holdings Inc | $185K | 1.1% | 23,713 | Unchanged |
Share of 13F holdings is each fund's shares as a share of the 2,203,112 STEM shares all 13F filers reported, not of shares outstanding.
Biggest buyers in Q2 2026
- Marshall Wace, LLP Added+$892K
- Acadian Asset Management LLC Added+$497K
- Longaeva Partners L.P. New+$376K
- BNP Paribas Financial Markets Added+$312K
- BlackRock, Inc. Added+$232K
- Citadel Advisors LLC New+$185K
- XTX Topco Ltd Added+$151K
- Trexquant Investment LP Added+$148K
- Vanguard Capital Management LLC Added+$136K
- Price T Rowe Associates Inc Added+$100K
Biggest sellers in Q2 2026
- Two Sigma Investments, LP Trimmed-$564K
- UBS Group AG Trimmed-$219K
- Canada Pension Plan Investment Board Sold out-$188K
- Virtu Financial LLC Sold out-$166K
- Centiva Capital, LP Sold out-$132K
- Susquehanna Portfolio Strategies, LLC Sold out-$106K
- Morgan Stanley Trimmed-$81K
- Bridgeway Capital Management, LLC Trimmed-$78K
- Citigroup Inc Trimmed-$68K
- Gsa Capital Partners LLP Trimmed-$48K
The change in shares since the quarter before, adjusted for stock splits and priced at the Q2 2026 value per share. Funds bought $3.5M and sold $1.7M; 16 added and 18 trimmed.
Questions about STEM ownership
- Who owns STEM stock?
- 73 institutional investment managers reported STEM positions in their Form 13F filings for Q2 2026, holding 2,203,112 shares worth $17.2M in total. Marshall Wace, LLP reported the largest position.
- Are funds buying or selling STEM?
- In Q2 2026, 10 managers opened new STEM positions, 16 added, 18 trimmed and 11 sold out. Managers that filed in both quarters added a net 238,553 shares.
- How current is this STEM institutional ownership data?
- It covers holdings as of the end of Q2 2026. Managers have 45 days after the quarter ends to file Form 13F (by August 14, 2026 for Q2 2026), so positions may have changed since.
From the SEC's Form 13F data sets for Q2 2026: every 13F holdings report, matched to STEM by CUSIP. Options are left out. STEM news and filings · STEM insider trades · Top funds