STEM Institutional Ownership & Shareholders
STEM INC (STEM) is currently held by 70 institutional investors tracked by InsiderSet, with a combined reported market value of approximately $17.43M based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026.
Marshall Wace, Llp is currently the largest disclosed institutional shareholder of STEM tracked by InsiderSet, reporting ownership valued at approximately $3.17M in its June 30, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $912,618, representing an estimated loss of -71.19% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 71% of the total disclosed STEM value among the investors covered in this analysis. Major shareholders include Marshall Wace, Llp, Vanguard Capital Management Llc, Blackrock, Inc., and several other long-term asset managers with concentrated positions in STEM INC (STEM).
This page ranks the largest institutional STEM shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
70
Total Reported Value
$17.43M
Largest Holder
Marshall Wace, Llp
Largest Position
$3.17M
Insider Transactions (90d)
18
Latest Filing Quarter
Q2 2026
New Institutional Positions
107
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Marshall Wace, Llp | 0.00% | 405,608 | $3,167,799 | $912,618 | -$2,255,181 | -71.19% | |
| Vanguard Capital Management Llc | 0.00% | 361,249 | $2,821,355 | $812,810 | -$2,008,545 | -71.19% | |
| Blackrock, Inc. | 0.00% | 164,477 | $1,284,565 | $370,073 | -$914,492 | -71.19% | |
| Trexquant Investment Lp | 0.01% | 110,640 | $864,098 | $248,940 | -$615,158 | -71.19% | |
| Two Sigma Investments, Lp | 0.00% | 103,234 | $806,258 | $232,277 | -$573,982 | -71.19% | |
| Gsa Capital Partners Llp | 0.05% | 102,321 | $799,000 | $230,222 | -$568,778 | -71.19% | |
| Bnp Paribas Financial Markets | 0.00% | 93,094 | $727,064 | $209,462 | -$517,603 | -71.19% | |
| Geode Capital Management, Llc | 0.00% | 93,014 | $726,785 | $209,282 | -$517,504 | -71.20% | |
| Acadian Asset Management Llc | 0.00% | 74,646 | $579,000 | $167,954 | -$411,047 | -70.99% | |
| Renaissance Technologies LLC | Jim Simons | 0.00% | 66,482 | $519,224 | $149,585 | -$369,640 | -71.19% |
| Bridgeway Capital Management, Llc | 0.01% | 59,600 | $465,476 | $134,100 | -$331,376 | -71.19% | |
| Vanguard Fiduciary Trust Co | 0.00% | 56,898 | $444,373 | $128,021 | -$316,353 | -71.19% | |
| Longaeva Partners L.P. | 0.01% | 48,186 | $376,333 | $108,419 | -$267,915 | -71.19% | |
| Advisors Asset Management, Inc. | 0.01% | 19,442 | $368,815 | $43,745 | -$325,071 | -88.14% | |
| State Street Corp | 0.00% | 38,278 | $298,951 | $86,126 | -$212,826 | -71.19% | |
| Morgan Stanley | 0.00% | 37,661 | $294,132 | $84,737 | -$209,395 | -71.19% | |
| Cohen & Steers, Inc. | 0.00% | 31,887 | $249,000 | $71,746 | -$177,254 | -71.19% | |
| Royal Bank Of Canada | 0.00% | 29,636 | $231,000 | $66,681 | -$164,319 | -71.13% | |
| Xtx Topco Ltd | 0.00% | 29,482 | $230,254 | $66,335 | -$163,920 | -71.19% | |
| Citigroup Inc | 0.00% | 28,526 | $222,788 | $64,184 | -$158,605 | -71.19% | |
| Hsbc Holdings Plc | 0.00% | 28,424 | $221,423 | $63,954 | -$157,469 | -71.12% | |
| Price T Rowe Associates Inc | 0.00% | 26,655 | $209,000 | $59,974 | -$149,026 | -71.30% | |
| Keyframe Capital Partners, L.P. | 100.00% | 25,924 | $202,466 | $58,329 | -$144,137 | -71.19% | |
| Ubs Group Ag | 0.00% | 25,132 | $196,281 | $56,547 | -$139,734 | -71.19% | |
| Citadel Advisors Llc | 0.00% | 23,727 | $185,308 | $53,386 | -$131,922 | -71.19% | |
| Nomura Holdings Inc | 0.00% | 23,713 | $185,199 | $53,354 | -$131,845 | -71.19% | |
| Northern Trust Corp | 0.00% | 21,241 | $165,892 | $47,792 | -$118,100 | -71.19% | |
| Engineers Gate Manager Lp | 0.00% | 12,700 | $99,187 | $28,575 | -$70,612 | -71.19% | |
| Bank Of America Corp | 0.00% | 11,385 | $88,917 | $25,616 | -$63,301 | -71.19% | |
| Goldman Sachs Group Inc | 0.00% | 11,346 | $88,612 | $25,529 | -$63,084 | -71.19% | |
| Balyasny Asset Management L.P. | 0.00% | 9,717 | $75,890 | $21,863 | -$54,027 | -71.19% | |
| Zweig-Dimenna Associates Llc | 0.01% | 8,302 | $64,839 | $18,680 | -$46,160 | -71.19% | |
| Wells Fargo & Company/Mn | 0.00% | 4,630 | $36,160 | $10,418 | -$25,743 | -71.19% | |
| Group One Trading Llc | 0.00% | 4,054 | $31,662 | $9,122 | -$22,541 | -71.19% | |
| Steward Partners Investment Advisory, Llc | 0.00% | 3,487 | $27,233 | $7,846 | -$19,387 | -71.19% | |
| Vanguard Global Advisers, Llc | 0.00% | 2,852 | $22,274 | $6,417 | -$15,857 | -71.19% | |
| Pnc Financial Services Group, Inc. | 0.00% | 1,080 | $8,435 | $2,430 | -$6,005 | -71.19% | |
| Simplex Trading, Llc | 0.00% | 840 | $6,560 | $1,890 | -$4,670 | -71.19% | |
| Osaic Holdings, Inc. | 0.00% | 703 | $5,488 | $1,582 | -$3,906 | -71.18% | |
| Jpmorgan Chase & Co | 0.00% | 712 | $5,326 | $1,602 | -$3,724 | -69.92% | |
| Fmr Llc | 0.00% | 648 | $5,061 | $1,458 | -$3,603 | -71.19% | |
| National Bank Of Canada | 0.00% | 514 | $4,014 | $1,157 | -$2,858 | -71.19% | |
| Sbi Securities Co., Ltd. | 0.00% | 889 | $3,778 | $2,000 | -$1,778 | -47.06% | |
| Rockefeller Capital Management L.P. | 0.00% | 392 | $3,062 | $882 | -$2,180 | -71.20% | |
| Deutsche Bank Ag\ | 0.00% | 347 | $2,710 | $781 | -$1,929 | -71.19% | |
| Cwm, Llc | 0.00% | 246 | $2,175 | $554 | -$1,622 | -74.55% | |
| Hurley Capital, Llc | 0.00% | 245 | $1,913 | $551 | -$1,362 | -71.18% | |
| Federation Des Caisses Desjardins Du Quebec | 0.00% | 199 | $1,554 | $448 | -$1,106 | -71.19% | |
| Barclays Plc | 0.00% | 167 | $1,304 | $376 | -$928 | -71.18% | |
| Ubs Am, A Distinct Business Unit Of Ubs Asset Management Americas Llc | 0.00% | 62 | $548 | $140 | -$409 | -74.54% |
Frequently asked questions about STEM
Who are the largest institutional holders of STEM?
The largest institutional holders of STEM reported in the latest SEC Form 13F filings include Marshall Wace, Llp, Vanguard Capital Management Llc, Blackrock, Inc., Trexquant Investment Lp, and Two Sigma Investments, Lp. InsiderSet ranks institutional holders by their latest reported STEM position.
What is STEM institutional ownership?
This page tracks STEM positions reported by institutional investment managers through SEC Form 13F. STEM INC (STEM) institutional ownership on InsiderSet reflects disclosed 13F holdings among the managers we analyze, not every shareholder of the stock.
How many institutions own STEM?
InsiderSet currently tracks 70 institutional managers reporting STEM holdings in the latest available 13F data. This count reflects institutions included in the SEC Form 13F filings analyzed by InsiderSet and should not be interpreted as the total number of STEM shareholders.
How much STEM stock do institutions own?
Institutional investment managers disclosed approximately $17.43M in STEM holdings for Q2 2026. This figure is reported 13F value as of the filing period, not necessarily today's market value.
When was STEM institutional ownership last updated?
The latest STEM institutional ownership data on InsiderSet is based on SEC Form 13F filings for the quarter ended June 30, 2026. Form 13F filings are generally reported after the quarter ends, so the holdings shown represent the latest publicly disclosed positions rather than real-time institutional holdings.
Are institutional STEM holdings real-time?
No. Form 13F data is not real-time. It represents positions reported by institutional investment managers as of the end of the reporting quarter. An institution may have changed its STEM position after the reporting date.
Are institutions buying or selling STEM?
Institutional buying and selling can be analyzed by comparing STEM positions across consecutive 13F reporting periods. InsiderSet's STEM Ownership Changes page shows institutions that increased, reduced, initiated, or exited positions based on reported 13F holdings. View STEM ownership changes.
How has STEM institutional ownership changed over time?
InsiderSet tracks STEM institutional holdings across multiple 13F reporting periods, allowing investors to compare institutional holder counts, reported value, and reported shares over time.