Stem Institutional Ownership

Updated Oct 11, 2026

Stem, Inc. (NYSE:STEM) appeared in the 13F filings of 73 institutional investors for the quarter ended June 30, 2026.

• Their combined stake equaled 24.18% of outstanding shares in Q2 2026, up from 23.07% in Q1 2026.
• Total shares held in STEM rose 12.14% from Q1 2026; the number of holders fell 6.41% from Q2 2025.
• Of the 73 holders, 27 added to their positions, 19 reduced their stakes and 27 left their positions unchanged in Q2 2026.
• Altogether, institutional holders owned 2.2Mn STEM shares at the end of Q2 2026, up 238.46K from the prior quarter and up 614.95K from a year earlier.
• Marshall Wace, LLP held the largest position in STEM at 405.61K shares as of June 30, 2026, or 4.45% of shares outstanding.
• Holders that added the most shares of STEM in Q2 2026 were Marshall Wace, LLP (+114.27K shares), Acadian Asset Management LLC (+64.08K shares), BNP Paribas Financial Markets (+40K shares), BlackRock, Inc. (+29.77K shares) and XTX Topco Ltd (+19.31K shares).
• Among holders that kept a stake in STEM, the biggest sellers in Q2 2026 were Two Sigma Investments, LP (-72.16K shares), UBS Group AG (-28.1K shares), Morgan Stanley (-10.37K shares), Bridgeway Capital Management, LLC (-10K shares) and Citigroup Inc (-8.69K shares).
• Business Quant data shows the 10 biggest positions in STEM as of Q2 2026 were held by Marshall Wace, LLP (405.61K shares), Vanguard Capital Management LLC (361.25K shares), BlackRock, Inc. (164.48K shares), Trexquant Investment LP (110.64K shares), Two Sigma Investments, LP (103.23K shares), GSA Capital Partners LLP (102.32K shares), BNP Paribas Financial Markets (93.09K shares), Geode Capital Management, LLC (93.01K shares), Acadian Asset Management LLC (74.65K shares) and Renaissance Technologies LLC (66.48K shares).