Stem, Inc.
Stem, Inc. (STEM) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · STEM · as of Sep 30, 2025
Ownership Breakdown
98
Institutional Holders
▲ 8 vs Q2
$34.39M
Total Inst. Value
▲ $24.34M vs Q2
8.96M
Shares Outstanding
freeFloat 95.51%
1.96M
13F Shares Held
▲ 349,214 vs Q2
Institutional ownership = 13F shares ÷ total outstanding. Insider % = 100 − free float. Public % = free float − institution %. Data: FMP /symbol-positions-summary + /shares-float + SEC EDGAR.
Top Institutional Holders
STEM largest shareholders · institutional ownership
Q3 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
VANGUARD GROUP INC miscellaneous electrical machinery, equipment & supplies | 395.2K | 4.74% | 4.74% | $6.92B | Nov 7, 2025 | ▲ 8.5K |
SUSQUEHANNA INTERNATIONAL GROUP, LLP miscellaneous electrical machinery, equipment & supplies | 308.1K | 3.70% | 3.70% | $5.40B | Nov 14, 2025 | ▲ 84.4K |
SUSQUEHANNA INTERNATIONAL GROUP, LLP miscellaneous electrical machinery, equipment & supplies | 285.6K | 3.43% | 3.43% | $5.00B | Nov 14, 2025 | ▲ 56.6K |
MARSHALL WACE, LLP miscellaneous electrical machinery, equipment & supplies | 243.8K | 2.93% | 2.93% | $4.27B | Nov 13, 2025 | ▲ 213.7K |
BANK OF AMERICA CORP /DE/ miscellaneous electrical machinery, equipment & supplies | 217.9K | 2.62% | 2.62% | $3.82B | Feb 3, 2026 | ▲ 111.1K |
BLACKROCK, INC. miscellaneous electrical machinery, equipment & supplies | 139.4K | 1.67% | 1.67% | $2.44B | Nov 12, 2025 | ▼ 38.5K |
TWO SIGMA INVESTMENTS, LP miscellaneous electrical machinery, equipment & supplies | 94.0K | 1.13% | 1.13% | $1.65B | Nov 14, 2025 | ▲ 77.3K |
SUSQUEHANNA INTERNATIONAL GROUP, LLP miscellaneous electrical machinery, equipment & supplies | 87.0K | 1.04% | 1.04% | $1.52B | Nov 14, 2025 | ▼ 13.8K |
GEODE CAPITAL MANAGEMENT, LLC miscellaneous electrical machinery, equipment & supplies | 86.4K | 1.04% | 1.04% | $1.51B | Nov 12, 2025 | ▲ 1.1K |
CSS LLC/IL miscellaneous electrical machinery, equipment & supplies | 70.0K | 84.06% | 84.06% | $1.23B | Nov 13, 2025 | NEW |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q3 2025 vs prior quarter
Q3 2025
19
Increased
+644.7K shares15
New Positions
first time holders12
Decreased
−165.1K shares0
Sold Out
fully exitedNet shares change (top 50)
+479.6K
+644.7K / −165.1K
Net new holders
+22
15 new / 0 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
STEM insider trading · insider activity
Source: SEC Form 4
Insiders have been primarily selling shares recently. Selling may be driven by pre-scheduled Rule 10b5-1 plans rather than negative sentiment.
7
Buy transactions
0
Sell transactions
0.00
Buy/Sell ratio
$0M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
Tappin Matthew President, Software Products | Mar 11, 2026 | Sale | 402 | $10.83 | $4.4K | 2.8K | Form 4 ↗ |
Tappin Matthew President, Software Products | Mar 10, 2026 | Sale | 655 | $11.12 | $7.3K | 3.2K | Form 4 ↗ |
Laureles Saul R. Chief Legal Officer | Mar 10, 2026 | Sale | 942 | $11.12 | $10.5K | 27.4K | Form 4 ↗ |
Carlson Michael James President, Managed Services | Mar 10, 2026 | Sale | 2,079 | $11.12 | $23.1K | 19.5K | Form 4 ↗ |
Narayanan Arun Chief Executive Officer | Mar 10, 2026 | Sale | 5,145 | $11.12 | $57.2K | 13.0K | Form 4 ↗ |
Source: /insider-trading/search (FMP stable). Buy/Sell direction: acquisitionOrDisposition A=Buy, D=Sell. RSU vesting (M-Exempt) excluded from sentiment bar. All data from SEC EDGAR public filings.
About institutional & insider ownership
Stem, Inc. (STEM) is primarily owned by institutional investors, who hold approximately 21.9% of total shares outstanding. Company insiders own approximately 4.49%, while retail and public investors account for the remaining 73.58%.
The largest institutional shareholder of Stem, Inc. is VANGUARD GROUP INC, holding approximately 395,223 shares — equal to 4.74% of outstanding shares — as of September 30, 2025.
A total of 98 institutional investors currently hold STEM stock, with a combined institutional value of approximately $34,394,815 as of the most recent 13F filing period.
Frequently asked questions
STEM ownershipStem, Inc. (STEM) is primarily owned by institutional investors, who hold approximately 21.9% of shares. The largest shareholder is VANGUARD GROUP INC with a 4.74% stake. Company insiders hold 4.49%. Data sourced from SEC Form 13F as of September 30, 2025.