STEM INC STEM
COM NEW · Common Stock · CUSIP 85859N300
Energy software; Public Company
* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once ($484 this quarter). Holder counts are more reliable. Shares outstanding: 9.6m as of 2026-08-05, from the company's own SEC filing; the percentage can still exceed 100%: lent-out shares are counted by the lender and the buyer, and some reports overlap without saying so. Implied quarter-end price ≈ $7.81. Options: 5 managers hold calls ($922.4k notional), 3 hold puts ($503.7k).
Trends to Q2 2026
Institutional holders
Managers reporting a position, each quarter
Numbers
| Quarter | Holders |
|---|---|
| Q2 2024 | 1 |
| Q3 2024 | 1 |
| Q4 2024 | 1 |
| Q1 2025 | 1 |
| Q2 2025 | 81 |
| Q3 2025 | 85 |
| Q4 2025 | 86 |
| Q1 2026 | 75 |
| Q2 2026 | 73 |
Buyers vs sellers
Managers adding to or starting a position, vs cutting or selling out
Numbers
| Quarter | Bought or added | Cut or sold out |
|---|---|---|
| Q3 2024 | 0 | 0 |
| Q4 2024 | 0 | 1 |
| Q1 2025 | 0 | 0 |
| Q2 2025 | 79 | 1 |
| Q3 2025 | 43 | 39 |
| Q4 2025 | 37 | 43 |
| Q1 2026 | 25 | 42 |
| Q2 2026 | 26 | 30 |
Calls vs puts
Options held, notional value, last 4 quarters. P/C = puts ÷ calls
Numbers
| Quarter | Calls | Puts | P/C |
|---|---|---|---|
| Q3 2025 | $20.6m | $10.4m | 0.51 |
| Q4 2025 | $7.7m | $6.3m | 0.82 |
| Q1 2026 | $1.7m | $1.1m | 0.64 |
| Q2 2026 | $922.4k | $503.7k | 0.55 |
Biggest buyers
| MARSHALL WACE, LLP | Added | +114.3k |
| ACADIAN ASSET MANAGEMENT LLC | Added | +64.1k |
| Longaeva Partners L.P. | New | +48.2k |
| BNP PARIBAS FINANCIAL MARKETS | Added | +40.0k |
| BlackRock, Inc. | Added | +29.8k |
| CITADEL ADVISORS LLC | New | +23.7k |
| XTX Topco Ltd | Added | +19.3k |
| Trexquant Investment LP | Added | +19.0k |
| VANGUARD CAPITAL MANAGEMENT LLC | Added | +17.4k |
| PRICE T ROWE ASSOCIATES INC /MD/ | Added | +12.7k |
Biggest sellers
| TWO SIGMA INVESTMENTS, LP | Reduced | -72.2k |
| UBS Group AG | Reduced | -28.1k |
| CANADA PENSION PLAN INVESTMENT BOARD | Sold out | -21.3k |
| Virtu Financial LLC | Sold out | -18.8k |
| Centiva Capital, LP | Sold out | -15.0k |
| Susquehanna Portfolio Strategies, LLC | Sold out | -12.0k |
| MORGAN STANLEY | Reduced | -10.4k |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC | Reduced | -10.0k |
| CITIGROUP INC | Reduced | -8.7k |
| GSA CAPITAL PARTNERS LLP | Reduced | -6.2k |
Biggest calls
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Reduced | $503.7k64.5k shares |
| CITADEL ADVISORS LLC | Added | $198.4k25.4k shares |
| IMC-Chicago, LLC | Added | $178.1k22.8k shares |
| GROUP ONE TRADING LLC | Reduced | $24.2k3.1k shares |
| SIMPLEX TRADING, LLC | Reduced | $18.0k2.3k shares |
Biggest puts
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Added | $383.5k49.1k shares |
| IMC-Chicago, LLC | New | $104.7k13.4k shares |
| SIMPLEX TRADING, LLC | Added | $15.6k2.0k shares |
Options at notional value: the value of the shares the contracts control, as filers report them, not what the options cost. Not included in the holders, shares or buying above.
Insider purchases and sales since 1 Apr 2026
Shares bought or sold by the company's own officers, directors and 10% owners, in the open market or privately, as they reported to the SEC on Form 4 (due within two business days of the trade). Grants, option exercises, shares withheld for tax and gifts aren't included.
Officers and directors buying vs selling
Number of people, by quarter (10% owners not included)
Numbers
| Quarter | Buying | Bought | Selling | Sold | Sold under a plan |
|---|---|---|---|---|---|
| Q4 2024 | 0 | — | 0 | — | — |
| Q1 2025 | 0 | — | 4 | $42.1k | — |
| Q2 2025 | 0 | — | 3 | $23.6k | $9.9k |
| Q3 2025 | 0 | — | 0 | — | — |
| Q4 2025 | 0 | — | 2 | $229.2k | — |
| Q1 2026 | 0 | — | 4 | $114.2k | $4.4k |
| Q2 2026 | 0 | — | 0 | — | — |
| Q3 2026 | 0 | — | 5 | $46.1k | — |
| Date | Insider | Trade | Value |
|---|---|---|---|
| 2026-09-29 | Carlson Michael James President, Managed Services | Sold | $682146 shares |
| 2026-07-20 | Musfeldt Brian Chief Financial Officer | Sold | $6.1k996 shares |
| 2026-07-02 | Narayanan Arun Chief Executive Officer | Sold | $15.7k2.0k shares |
| 2026-07-02 | Carlson Michael James President, Managed Services | Sold | $10.6k1.3k shares |
| 2026-07-02 | Tappin Matthew President, Software Products | Sold | $7.8k996 shares |
| 2026-07-02 | Laureles Saul R. Chief Legal Officer | Sold | $5.3k675 shares |
Their holding: how much the trade added to or took from the insider's holding (direct, or the trust or fund named). The same trade is sometimes reported by more than one insider, such as a fund and the director who represents it; totals count it once. A value is left blank where the reported price is far from the market price (usually a typo).
Holders, Q2 2026
| Manager | Shares | Change |
|---|---|---|
| MARSHALL WACE, LLP 0.00% of their portfolio | 405.6k $3.2m | Added +114.3k |
| VANGUARD CAPITAL MANAGEMENT LLC 0.00% of their portfolio | 361.2k $2.8m | Added +17.4k |
| BlackRock, Inc. 0.00% of their portfolio | 164.5k $1.3m | Added +29.8k |
| Trexquant Investment LP 0.01% of their portfolio | 110.6k $864.1k | Added +19.0k |
| TWO SIGMA INVESTMENTS, LP 0.00% of their portfolio | 103.2k $806.3k | Reduced -72.2k |
| GSA CAPITAL PARTNERS LLP 0.05% of their portfolio | 102.3k $799.0k | Reduced -6.2k |
| BNP PARIBAS FINANCIAL MARKETS 0.00% of their portfolio | 93.1k $727.1k | Added +40.0k |
| GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio | 93.0k $726.8k | Added +962 |
| ACADIAN ASSET MANAGEMENT LLC 0.00% of their portfolio | 74.6k $579.0k | Added +64.1k |
| RENAISSANCE TECHNOLOGIES LLC 0.00% of their portfolio | 66.5k $519.2k | Added +7.9k |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC 0.01% of their portfolio | 59.6k $465.5k | Reduced -10.0k |
| VANGUARD FIDUCIARY TRUST CO 0.00% of their portfolio | 56.9k $444.4k | Added +7.2k |
| Longaeva Partners L.P. 0.01% of their portfolio | 48.2k $376.3k | New |
| STATE STREET CORP 0.00% of their portfolio | 38.3k $299.0k | Reduced -1 |
| MORGAN STANLEY 0.00% of their portfolio | 37.7k $294.1k | Reduced -10.4k |
| COHEN & STEERS, INC. 0.00% of their portfolio | 31.9k $249.0k | Unchanged |
| ROYAL BANK OF CANADA 0.00% of their portfolio | 29.6k $231.0k | Added +1.4k |
| XTX Topco Ltd 0.00% of their portfolio | 29.5k $230.3k | Added +19.3k |
| CITIGROUP INC 0.00% of their portfolio | 28.5k $222.8k | Reduced -8.7k |
| HSBC HOLDINGS PLC 0.00% of their portfolio | 28.4k $221.4k | Unchanged |
| PRICE T ROWE ASSOCIATES INC /MD/ 0.00% of their portfolio | 26.7k $209.0k | Added +12.7k |
| Keyframe Capital Partners, L.P. 100.00% of their portfolio | 25.9k $202.5k | Unchanged |
| UBS Group AG 0.00% of their portfolio | 25.1k $196.3k | Reduced -28.1k |
| CITADEL ADVISORS LLC 0.00% of their portfolio | 23.7k $185.3k | New |
| NOMURA HOLDINGS INC 0.00% of their portfolio | 23.7k $185.2k | Unchanged |
| NORTHERN TRUST CORP 0.00% of their portfolio | 21.2k $165.9k | Added +2.6k |
| HighTower Advisors, LLC 0.00% of their portfolio | 16.1k $126.1k | Unchanged |
| Engineers Gate Manager LP 0.00% of their portfolio | 12.7k $99.2k | New |
| BANK OF AMERICA CORP /DE/ 0.00% of their portfolio | 11.4k $88.9k | Reduced -32 |
| GOLDMAN SACHS GROUP INC 0.00% of their portfolio | 11.3k $88.6k | New |
| Balyasny Asset Management L.P. 0.00% of their portfolio | 9.7k $75.9k | New |
| Zweig-DiMenna Associates LLC 0.01% of their portfolio | 8.3k $64.8k | Unchanged |
| WELLS FARGO & COMPANY/MN 0.00% of their portfolio | 4.6k $36.2k | Added +1.1k |
| GROUP ONE TRADING LLC 0.00% of their portfolio | 4.1k $31.7k | Reduced -994 |
| Steward Partners Investment Advisory, LLC 0.00% of their portfolio | 3.5k $27.2k | Added +1.0k |
| Vanguard Global Advisers, LLC 0.00% of their portfolio | 2.9k $22.3k | Unchanged |
| INTERNATIONAL ASSETS INVESTMENT MANAGEMENT, LLC 0.00% of their portfolio | 1.9k $14.8k | Reduced -30 |
| PNC Financial Services Group, Inc. 0.00% of their portfolio | 1.1k $8.4k | Unchanged |
| SIMPLEX TRADING, LLC 0.00% of their portfolio | 840 $6.6k | New |
| JPMORGAN CHASE & CO 0.00% of their portfolio | 712 $5.3k | New |
| OSAIC HOLDINGS, INC. 0.00% of their portfolio | 703 $5.5k | Reduced -120 |
| FMR LLC 0.00% of their portfolio | 648 $5.1k | Reduced -190 |
| NATIONAL BANK OF CANADA /FI/ 0.00% of their portfolio | 514 $4.0k | Reduced -470 |
| Rockefeller Capital Management L.P. 0.00% of their portfolio | 392 $3.1k | Reduced -10 |
| DEUTSCHE BANK AG\ 0.00% of their portfolio | 347 $2.7k | Unchanged |
| Hurley Capital, LLC 0.00% of their portfolio | 245 $1.9k | Unchanged |
| Federation des caisses Desjardins du Quebec 0.00% of their portfolio | 199 $1.6k | Unchanged |
| CKW FINANCIAL GROUP 0.00% of their portfolio | 192 $2.0k | Unchanged |
| BARCLAYS PLC 0.00% of their portfolio | 167 $1.3k | New |
| SBI Securities Co., Ltd. 0.00% of their portfolio | 149 $1.2k | Added +1 |
| GAMMA Investing LLC 0.00% of their portfolio | 120 $937 | Reduced -82 |
| Cornerstone Financial Management LLC 0.00% of their portfolio | 66 $515 | Unchanged |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 0.00% of their portfolio | 62 $484 | Unchanged |
| US BANCORP \DE\ 0.00% of their portfolio | 60 $469 | Reduced -6 |
| HARBOUR INVESTMENTS, INC. 0.00% of their portfolio | 57 $445 | Unchanged |
| NISA INVESTMENT ADVISORS, LLC 0.00% of their portfolio | 50 $391 | Unchanged |
| JONES FINANCIAL COMPANIES LLLP 0.00% of their portfolio | 36 $265 | Reduced -60 |
| Wilmington Savings Fund Society, FSB 0.00% of their portfolio | 35 $273 | Unchanged |
| HM PAYSON & CO 0.00% of their portfolio | 25 $196 | Unchanged |
| CoreCap Advisors, LLC 0.00% of their portfolio | 25 $195 | Unchanged |
| Quent Capital, LLC 0.00% of their portfolio | 25 $195 | Unchanged |
| Strategic Investment Solutions, Inc. /IL 0.00% of their portfolio | 25 $195 | Unchanged |
| American Capital Advisory, LLC 0.00% of their portfolio | 24 $188 | New |
| Strategic Wealth Partners, Ltd. 0.00% of their portfolio | 19 $148 | Unchanged |
| Allworth Financial LP 0.00% of their portfolio | 12 $94 | Reduced -40 |
| Integrated Wealth Concepts LLC 0.00% of their portfolio | 12 $94 | New |
| Dogwood Wealth Management LLC 0.00% of their portfolio | 11 $86 | Unchanged |
| NORTHWESTERN MUTUAL WEALTH MANAGEMENT CO 0.00% of their portfolio | 10 $78 | Unchanged |
| MATHER GROUP, LLC. 0.00% of their portfolio | 10 $78 | Unchanged |
| Ascentis Wealth Management, LLC 0.00% of their portfolio | 7 $54 | Unchanged |
| IFP Advisors, Inc 0.00% of their portfolio | 5 $39 | Reduced -1.5k |
| Smallwood Wealth Investment Management, LLC 0.00% of their portfolio | 2 $15 | Unchanged |
| Russell Investments Group, Ltd. 0.00% of their portfolio | 1 $8 | Unchanged |