STEM's three largest insider shareholders as of August 29, 2026 are Robert Schaefer (President, Transformational, 716.11K shares), Mark William Triplett (Chief Operating Officer, 323.95K shares), Anil Tammineedi (Director, 214.49K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Robert Schaefer | President, Transformational | 716,110 | 0 | 716,110 | 53.1% | 20 Mar, 2024 |
| 2 | Mark William Triplett | Chief Operating Officer | 323,946 | 0 | 323,946 | 24.0% | 14 Apr, 2022 |
| 3 | Jane Woodward | Director | 49,511 | 0 | 49,511 | 3.7% | 10 Jun, 2024 |
| 4 | Saul R. Laureles | Chief Legal Officer | 34,525 | 0 | 34,525 | 2.6% | 02 Jul, 2026 |
| 5 | Michael James Carlson | President, Managed Services | 25,861 | 0 | 25,861 | 1.9% | 02 Jul, 2026 |
| 6 | John Eugene Carrington | Ceo And Director | 25,329 | 0 | 25,329 | 1.9% | 06 May, 2024 |
| 7 | William John Bush | Chief Financial Officer | 19,511 | 0 | 19,511 | 1.4% | 30 Apr, 2024 |
| 8 | Arun Narayanan | Chief Executive Officer | 19,109 | 0 | 19,109 | 1.4% | 02 Jul, 2026 |
| 9 | Laura D Tyson | Director | 15,473 | 0 | 15,473 | 1.1% | 11 Aug, 2026 |
| 10 | Anil Tammineedi | Director | 15,473 | 0 | 15,473 | 1.1% | 11 Aug, 2026 |
| 11 | Ira M Birns | Director | 14,207 | 0 | 14,207 | 1.1% | 11 Aug, 2026 |
| 12 | Adam Daley | Director | 12,050 | 0 | 12,050 | 0.9% | 02 Jun, 2025 |
| 13 | Alan Russo | Chief Revenue Officer | 10,646 | 0 | 10,646 | 0.8% | 30 Apr, 2024 |
| 14 | Krishna Shivram | Director | 10,597 | 0 | 10,597 | 0.8% | 11 Aug, 2026 |
| 15 | Matthew Tappin | President, Software Products | 9,577 | 0 | 9,577 | 0.7% | 02 Jul, 2026 |
| 16 | Hofeldt Albert | Chief Technology Officer | 9,293 | 0 | 9,293 | 0.7% | 21 Feb, 2025 |
| 17 | Kim Homenock | Chief People Officer | 9,228 | 0 | 9,228 | 0.7% | 21 Feb, 2025 |
| 18 | Prakesh Patel | Chief Strategy Officer | 9,083 | 0 | 9,083 | 0.7% | 30 Apr, 2024 |
| 19 | David S Buzby | Director | 7,486 | 0 | 7,486 | 0.6% | 11 Aug, 2026 |
| 20 | Larsh Johnson | Chief Technology Officer | 3,937 | 0 | 3,937 | 0.3% | 14 Mar, 2024 |
| 21 | Vasudevan Guruswamy | Director | 3,111 | 0 | 3,111 | 0.2% | 02 Jun, 2025 |
| 22 | Michael C Morgan | Director | 2,199 | 0 | 2,199 | 0.2% | 10 Jun, 2024 |
| 23 | Lisa L Troe | Director | 994 | 0 | 994 | 0.1% | 20 Jun, 2023 |
| 24 | Gerard Cunningham | Director | 607 | 0 | 607 | 0.0% | 10 Jun, 2024 |
Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.
| Date | Insider | Position | Transaction | Shares | Price | Value | Shares Held After | Ownership |
|---|---|---|---|---|---|---|---|---|
| 07 Aug, 2026 | Laura D Tyson | Director | Acquired A | 7,486 | — | — | 15,473 | Direct |
| 07 Aug, 2026 | Ira M Birns | Director | Acquired M | 7,486 | — | — | 14,207 | Direct |
| 07 Aug, 2026 | Anil Tammineedi | Director | Acquired M | 7,486 | — | — | 15,473 | Direct |
| 07 Aug, 2026 | David S Buzby | Director | Acquired M | 7,486 | — | — | 7,486 | Direct |
| 07 Aug, 2026 | Krishna Shivram | Director | Acquired M | 7,486 | — | — | 10,597 | Direct |
| 07 Aug, 2026 | Laura D Tyson | Director | Disposed M | 7,486 | $0.00 | $0 | 0 | Direct |
| 07 Aug, 2026 | Krishna Shivram | Director | Disposed M | 7,486 | $0.00 | $0 | 0 | Direct |
| 07 Aug, 2026 | Ira M Birns | Director | Disposed M | 7,486 | $0.00 | $0 | 0 | Direct |
| 07 Aug, 2026 | Anil Tammineedi | Director | Disposed M | 7,486 | $0.00 | $0 | 0 | Direct |
| 07 Aug, 2026 | David S Buzby | Director | Disposed M | 7,486 | $0.00 | $0 | 0 | Direct |
| 30 Jun, 2026 | Matthew Tappin | President, Software Products | Acquired M | 5,000 | $7.81 | $39.05K | 7,823 | Direct |
| 30 Jun, 2026 | Saul R. Laureles | Chief Legal Officer | Acquired M | 5,000 | $7.81 | $39.05K | 32,450 | Direct |
| 30 Jun, 2026 | Michael James Carlson | President, Managed Services | Acquired M | 5,000 | $7.81 | $39.05K | 24,458 | Direct |
| 30 Jun, 2026 | Arun Narayanan | Chief Executive Officer | Acquired M | 8,125 | $7.81 | $63.46K | 21,105 | Direct |
| 30 Jun, 2026 | Matthew Tappin | President, Software Products | Acquired M | 2,750 | $7.81 | $21.48K | 10,573 | Direct |
| 02 Jul, 2026 | Arun Narayanan | Chief Executive Officer | Disposed S | 1,996 | $7.85 | $15.67K | 19,109 | Direct |
| 30 Jun, 2026 | Michael James Carlson | President, Managed Services | Acquired M | 2,750 | $7.81 | $21.48K | 27,208 | Direct |
| 30 Jun, 2026 | Saul R. Laureles | Chief Legal Officer | Acquired M | 2,750 | $7.81 | $21.48K | 35,200 | Direct |
| 30 Jun, 2026 | Arun Narayanan | Chief Executive Officer | Disposed M | 8,125 | $0.00 | $0 | 8,125 | Direct |
| 02 Jul, 2026 | Matthew Tappin | President, Software Products | Disposed S | 996 | $7.85 | $7.82K | 9,577 | Direct |