STEM Institutional Ownership
Who owns Stem, Inc. and what the big funds did with it last quarter, from every SEC 13F filing. 74 funds reported holding STEM at Jun 30, 2026, together owning 22.9% of the company.
- ●26 buying vs 29 selling
- ▲Held by funds +2.5 pts
- ▼Funds holding -2
- ▲Superinvestors: 2 added, 0 cut
- ●Put/call not meaningful
What the filings show, not a forecast. Positions can be up to 45 days old and leave out short sales.
Funds holding and ownership
8 quartersQuarter over quarter
all 13F filers| Q2 2026 | This quarter | Q1 2026 | Change |
|---|---|---|---|
| Funds holding | 74 | 76 | −2.6% |
| In funds' top 10 | 1 | 1 | 0.0% |
| 13F shares | 2.2M | 2M | +12.1% |
| Held by funds | 22.9% | 20.4% | +2.5 pts |
| New positions | 10 | 9 | +11.1% |
| Increased | 16 | 16 | 0.0% |
| Reduced | 18 | 21 | −14.3% |
| Sold out | 11 | 20 | −45.0% |
| Calls (shares) | 0 | 0 | – |
| Puts (shares) | 0 | 70K | −100.0% |
| Put/call ratio | – | – | – |
Buyers vs sellers
adding or new vs cutting or sold outSuperinvestors in STEM
All superinvestors →
Who owns STEM
share of fund held shares- Index and passive funds33.5%
- Active managers and hedge funds53.1%
- Banks and brokers13.4%
- Pensions, insurers and other0.0%
The top 10 holders own 71.5% of all STEM shares that funds reported. Groups are our own grouping of filers by name.
Put/call ratio
funds' options, market makers left outAbove 1 means funds hold more puts than calls, a sign of hedging or bets on a fall. Options are valued at the underlying shares.
Filed so far for Q3 2026
7 funds changed their position- International Assets Investment Management, LLCSold out−1,870 sh
- SBI Securities Co., Ltd.Added+740 sh
- GAMMA Investing LLCSold out−120 sh
- Nisa Investment Advisors, LLCSold out−50 sh
- Caitong International Asset Management Co., LtdNew+11 sh
🔒 Free account: see all 7.
Top holders
Q2 2026| # | Fund | Of company | Shares | Value | Change |
|---|---|---|---|---|---|
| 1 | Marshall Wace, LLP | 4.21% | 406K | $3.2M | +114K |
| 2 | Vanguard Capital Management LLC | 3.75% | 361K | $2.8M | +17K |
| 3 | BlackRock, Inc. | 1.71% | 164K | $1.3M | +30K |
| 4 | Trexquant Investment LP | 1.15% | 111K | $864K | +19K |
| 5 | Two Sigma Investments, LP | 1.07% | 103K | $806K | −72K |
| 6 | Gsa Capital Partners LLP | 1.06% | 102K | $799K | −6,181 |
| 7 | Bnp Paribas Financial Markets | 0.97% | 93K | $727K | +40K |
| 8 | Geode Capital Management, LLC | 0.97% | 93K | $727K | +962 |
| 9 | Acadian Asset Management LLC | 0.78% | 75K | $579K | +64K |
| 10 | Renaissance Technologies LLC | 0.69% | 66K | $519K | +7,907 |
- Marshall Wace, LLP+114K sh+$892K
- Acadian Asset Management LLC+64K sh+$497K
- Longaeva Partners L.P.+48K sh+$376K
- Bnp Paribas Financial Markets+40K sh+$312K
- BlackRock, Inc.+30K sh+$232K
- Citadel Advisors LLC+24K sh+$185K
- XTX Topco Ltd+19K sh+$151K
- Trexquant Investment LP+19K sh+$148K
- Two Sigma Investments, LP−72K sh−$564K
- UBS Group AG−28K sh−$219K
- Canada Pension Plan Investment Board−21K sh−$188K
- Virtu Financial LLC−19K sh−$166K
- Centiva Capital, LP−15K sh−$132K
- Susquehanna Portfolio Strategies, LLC−12K sh−$106K
- Morgan Stanley−10K sh−$81K
- Bridgeway Capital Management, LLC−10K sh−$78K
STEM institutional ownership FAQ
Who owns the most STEM stock?
In Q2 2026 13F filings the largest holder of STEM was Marshall Wace, LLP, followed by Vanguard Capital Management LLC and BlackRock, Inc.. Index fund managers are usually the biggest holders of large companies.
What percentage of STEM is owned by institutions?
Funds that file 13F reports held 22.9% of STEM's shares at Jun 30, 2026, compared with 20.4% a quarter earlier. That counts every manager with more than $100 million in US stocks.
Are hedge funds buying STEM?
In Q2 2026, 26 funds bought STEM (10 of them new positions) and 29 sold (11 sold out completely). Among well known investors, 2 added and 0 cut. Our fund sentiment for STEM is neutral.
What is STEM's institutional put/call ratio?
Too few option positions were reported for a meaningful ratio.
How current is this STEM ownership data?
13F filings show holdings at the end of each quarter and are due within 45 days, so positions can be up to six weeks old when they appear. We add each new filing within minutes, and the "filed so far" list shows funds that have already reported the next quarter.
For informational and educational purposes only. Not investment advice, and not a recommendation to buy or sell any security. Fund sentiment summarises what 13F filings show and is not a forecast. Holdings come from SEC Form 13F filings as reported and show positions at the end of the quarter, up to 45 days before the filing. A 13F leaves out short positions, cash, bonds and most foreign holdings. See all hedge fund holdings.