STEM
STEM, INC.
Services-Computer Integrated Systems DesignNYSEAccelerated filer<br>Smaller reporting company
Total Trades
132
Buys
3
Sells
89
Largest Trade
N/A
Insiders
18
Institutional Funds
62
Inst. Value
$1M+
Activist Filings
11
Insider Trades
| Insider | Title | Type | Value | Shares | Price | Date |
|---|---|---|---|---|---|---|
| Laureles Saul R. | Chief Legal Officer | SELL | $1K–$15K | 292 | $9.67 | Mar 4, 2026 |
| Tappin Matthew | President | SELL | $1K–$15K | 485 | $9.80 | Mar 4, 2026 |
| Tappin Matthew | President | SELL | $1K–$15K | 366 | $11.40 | Feb 23, 2026 |
| Tappin Matthew | President | SELL | $100K–$500K | 10K | $17.70 | Nov 24, 2025 |
| Shukla Rahul | Chief Accounting O… | SELL | $50K–$100K | 4K | $16.21 | Nov 19, 2025 |
| Tappin Matthew | President | EXERCISE | N/A | 3K | — | Jun 18, 2025 |
| Tappin Matthew | President | SELL | $1K–$15K | 22K | $0.45 | Jun 18, 2025 |
| Shukla Rahul | Chief Accounting O… | SELL | $15K–$50K | 45K | $0.52 | May 7, 2025 |
| Shukla Rahul | Chief Accounting O… | EXERCISE | N/A | 45K | — | May 7, 2025 |
| Laureles Saul R. | Chief Legal Officer | SELL | <$1K | 809 | $0.53 | May 6, 2025 |
| Laureles Saul R. | Chief Legal Officer | EXERCISE | N/A | 3K | — | May 6, 2025 |
| Tappin Matthew | President | SELL | $1K–$15K | 19K | $0.41 | Mar 17, 2025 |
| Tappin Matthew | President | EXERCISE | N/A | 43K | — | Mar 17, 2025 |
| Carlson Michael James | COO | EXERCISE | N/A | 71K | — | Mar 17, 2025 |
| Carlson Michael James | COO | SELL | $1K–$15K | 28K | $0.40 | Mar 17, 2025 |
| Albert Hofeldt | CTO | EXERCISE | N/A | 47K | — | Feb 22, 2025 |
| Albert Hofeldt | CTO | SELL | $1K–$15K | 13K | $0.63 | Feb 22, 2025 |
| Tappin Matthew | President | SELL | $1K–$15K | 8K | $0.63 | Feb 22, 2025 |
| Tappin Matthew | President | EXERCISE | N/A | 24K | — | Feb 22, 2025 |
| Tappin Matthew | President | SELL | $1K–$15K | 1K | $1.32 | May 30, 2024 |
| Patel Prakesh | Chief Strategy Off… | SELL | $15K–$50K | 24K | $1.87 | Apr 30, 2024 |
| Patel Prakesh | Chief Strategy Off… | EXERCISE | N/A | 68K | — | Apr 30, 2024 |
| BUSH WILLIAM JOHN | CFO | SELL | $15K–$50K | 24K | $1.87 | Apr 30, 2024 |
| BUSH WILLIAM JOHN | CFO | EXERCISE | N/A | 69K | — | Apr 30, 2024 |
| Laureles Saul R. | Chief Legal Officer | SELL | $1K–$15K | 822 | $1.87 | Apr 30, 2024 |
| Laureles Saul R. | Chief Legal Officer | EXERCISE | N/A | 3K | — | Apr 30, 2024 |
| Russo Alan | Chief Revenue Offi… | SELL | $15K–$50K | 24K | $1.87 | Apr 30, 2024 |
| Russo Alan | Chief Revenue Offi… | EXERCISE | N/A | 69K | — | Apr 30, 2024 |
| Schaefer Robert | President | SELL | $100K–$500K | 100K | $1.82 | Mar 20, 2024 |
| Tappin Matthew | President | SELL | $15K–$50K | 27K | $1.82 | Mar 20, 2024 |
| BUZBY DAVID S | Director | BUY | $50K–$100K | 34K | $1.81 | Mar 20, 2024 |
| Carrington John Eugene | CEO and Director | SELL | $15K–$50K | 14K | $2.70 | Feb 27, 2024 |
| Carrington John Eugene | CEO and Director | EXERCISE | N/A | 35K | — | Feb 27, 2024 |
| Shukla Rahul | Chief Accounting O… | EXERCISE | N/A | 20K | — | Feb 26, 2024 |
| Shukla Rahul | Chief Accounting O… | SELL | $15K–$50K | 8K | $2.65 | Feb 26, 2024 |
| Tappin Matthew | President | SELL | $15K–$50K | 7K | $3.05 | Feb 21, 2024 |
| Laureles Saul R. | Chief Legal Officer | SELL | $15K–$50K | 11K | $3.17 | Feb 20, 2024 |
| Laureles Saul R. | Chief Legal Officer | EXERCISE | N/A | 35K | — | Feb 20, 2024 |
| Russo Alan | Chief Revenue Offi… | SELL | $15K–$50K | 14K | $3.17 | Feb 20, 2024 |
| Russo Alan | Chief Revenue Offi… | EXERCISE | N/A | 33K | — | Feb 20, 2024 |
| Johnson larsh | CTO | EXERCISE | N/A | 28K | — | Feb 20, 2024 |
| Johnson larsh | CTO | SELL | $15K–$50K | 12K | $3.17 | Feb 20, 2024 |
| Patel Prakesh | Chief Strategy Off… | EXERCISE | N/A | 33K | — | Feb 20, 2024 |
| Patel Prakesh | Chief Strategy Off… | SELL | $15K–$50K | 14K | $3.17 | Feb 20, 2024 |
| Schaefer Robert | President | EXERCISE | N/A | 22K | — | Feb 20, 2024 |
| Schaefer Robert | President | SELL | $15K–$50K | 8K | $3.17 | Feb 20, 2024 |
| Tappin Matthew | President | SELL | $15K–$50K | 11K | $3.17 | Feb 20, 2024 |
| Tappin Matthew | President | EXERCISE | N/A | 24K | — | Feb 20, 2024 |
| BUSH WILLIAM JOHN | CFO | SELL | $50K–$100K | 20K | $3.17 | Feb 20, 2024 |
| BUSH WILLIAM JOHN | CFO | EXERCISE | N/A | 49K | — | Feb 20, 2024 |
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Institutional Ownership
13F filings as of Dec 31, 2025 · 62 funds holding
| Fund | Shares | Value | Type |
|---|---|---|---|
| GSA CAPITAL PARTNERS LLP | 79K | $1M+ | SH |
| GEODE CAPITAL MANAGEMENT, LLC | 71K | $1M+ | SH |
| VANGUARD GROUP INC | 50K | $500K+ | SH |
| STATE STREET CORP | 38K | $500K+ | SH |
| GOLDMAN SACHS GROUP INC | 36K | $500K+ | SH |
| CITIGROUP INC | 34K | $500K+ | SH |
| DnB Asset Management AS | 32K | $100K–$500K | SH |
| COHEN & STEERS, INC. | 32K | $100K–$500K | SH |
| WOLVERINE ASSET MANAGEMENT LLC | 29K | $100K–$500K | SH (Put) |
| Keyframe Capital Partners, L.P. | 26K | $100K–$500K | SH |
| HSBC HOLDINGS PLC | 24K | $100K–$500K | SH |
| Walleye Capital LLC | 24K | $100K–$500K | SH |
| JANE STREET GROUP, LLC | 20K | $100K–$500K | SH (Call) |
| BNP PARIBAS FINANCIAL MARKETS | 19K | $100K–$500K | SH |
| PEAK6 LLC | 19K | $100K–$500K | SH (Call) |
| HighTower Advisors, LLC | 16K | $100K–$500K | SH |
| MARSHALL WACE, LLP | 16K | $100K–$500K | SH |
| Skaana Management L.P. | 15K | $100K–$500K | SH (Call) |
| OMERS ADMINISTRATION Corp | 13K | $100K–$500K | SH |
| NOMURA HOLDINGS INC | 12K | $100K–$500K | SH |
Activist & 5%+ Owners
SC 13D/13G filings — investors holding 5%+ of outstanding shares
SC 13G/A · Jul 29, 2025
4.6%
387K shares
SC 13G/A · Jul 18, 2025
2.1%
178K shares
SC 13G/A · Nov 12, 2024
5.3%
8.7M shares
SC 13G/A · Nov 4, 2024
5.3%
8.7M shares
SC 13G/A · Nov 4, 2024
5.3%
8.7M shares
The Vanguard Group - 23-1945930
SC 13G/A · Feb 13, 2024
7.1%
11.1M shares
Schroder Investment Management Limited
SC 13G · Feb 13, 2024
6.8%
10.6M shares
SC 13G/A · Jan 26, 2024
7.3%
11.4M shares
SC 13G · Feb 3, 2023
6.2%
9.6M shares
Park West Asset Management LLC
SC 13G/A · Feb 14, 2022
0.0%
0 shares
SC 13G/A · Feb 14, 2022
0.0%
134K shares