Matthew Tappin

Companies

• Stem Inc.President Jul 24, 2023 to Nov 12, 2025¹

Holdings

Stock this person has reported owning, from the forms officers and directors file with the SEC. See the biggest insider stakes.

Shares held

• SStem Inc. STEM9,577 shares²$32.1K at $3.35Jul 2, 2026

As of each latest filing. The line shows shares held over time.

Recent filings

• Jul 2, 2026Sold 996 shares at $7.85 of Stem Inc.²
• Jun 30, 2026Exercised options 2,750 shares at $7.81 of Stem Inc.²
• Jun 30, 2026Exercised options 5,000 shares at $7.81 of Stem Inc.²
• Mar 11, 2026Sold 402 shares at $10.83 of Stem Inc.³
• Mar 10, 2026Sold 655 shares at $11.12 of Stem Inc.⁴
• Mar 7, 2026Exercised options 1,458 shares of Stem Inc.⁴
• Mar 4, 2026Sold 185 shares at $10.00 of Stem Inc.⁵
• Mar 3, 2026Sold 300 shares at $9.67 of Stem Inc.⁵
• Mar 1, 2026Exercised options 670 shares of Stem Inc.⁶
• Feb 20, 2026Sold 366 shares at $11.40 of Stem Inc.⁷
• Feb 19, 2026Shares withheld for tax 522 shares at $11.30 of Stem Inc.⁸
• Feb 15, 2026Exercised options 1,253 shares of Stem Inc.⁹
• Nov 11, 2025Sold 9,584 shares at $17.70 of Stem Inc.¹⁰
• Nov 10, 2025Shares withheld for tax 5,416 shares at $18.27 of Stem Inc.¹¹
• Nov 7, 2025Exercised options 15,000 shares of Stem Inc.¹¹
• Jun 16, 2025Sold 20,823 shares at $0.45 of Stem Inc.¹²
• May 30, 2025Sold 1,164 shares at $0.45 of Stem Inc.¹²
• May 29, 2025Exercised options 2,775 shares of Stem Inc.¹²
• Mar 12, 2025Sold 13,070 shares at $0.40 of Stem Inc.¹³
• Mar 11, 2025Exercised options 29,167 shares of Stem Inc.¹³
• Mar 7, 2025Sold 5,645 shares at $0.42 of Stem Inc.¹³
• Mar 6, 2025Exercised options 13,397 shares of Stem Inc.¹³
• Feb 20, 2025Sold 8,130 shares at $0.63 of Stem Inc.¹⁴
• Feb 19, 2025Exercised options 24,316 shares of Stem Inc.¹⁴
• May 28, 2024Sold 1,388 shares at $1.32 of Stem Inc.¹⁵