Altus Power, Inc.
Altus Power, Inc. (AMPS) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · AMPS · as of Mar 31, 2025
Ownership Breakdown
157
Institutional Holders
▲ 16 vs Q4
$529.35M
Total Inst. Value
▲ $216.42M vs Q4
160.42M
Shares Outstanding
freeFloat 33.29%
106.98M
13F Shares Held
▲ 30.15M vs Q4
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
AMPS largest shareholders · institutional ownership
Q1 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
BLACKSTONE INC. electric services | 21.12M | 13.14% | 13.14% | $104.52B | May 15, 2025 | — held |
GLAZER CAPITAL, LLC electric services | 13.97M | 8.70% | 8.70% | $69.17B | May 15, 2025 | NEW |
BLACKROCK, INC. electric services | 7.68M | 4.78% | 4.78% | $38.02B | May 2, 2025 | ▲ 176.3K |
ALLIANCEBERNSTEIN L.P. electric services | 6.93M | 4.31% | 4.31% | $34.29B | May 15, 2025 | ▲ 6.77M |
UBS GROUP AG electric services | 5.69M | 3.54% | 3.54% | $28.18B | May 13, 2025 | ▲ 5.26M |
POLAR ASSET MANAGEMENT PARTNERS INC. electric services | 5.06M | 3.15% | 3.15% | $25.05B | May 15, 2025 | NEW |
VANGUARD GROUP INC electric services | 4.86M | 3.02% | 3.02% | $24.04B | May 9, 2025 | ▲ 1.10M |
LIBERTY MUTUAL GROUP ASSET MANAGEMENT INC. electric services | 2.92M | 1.82% | 1.82% | $14.45B | May 8, 2025 | — held |
DIMENSIONAL FUND ADVISORS LP electric services | 2.71M | 1.69% | 1.69% | $13.40B | May 13, 2025 | ▼ 940.8K |
INVESCO LTD. electric services | 2.55M | 1.59% | 1.59% | $12.62B | May 12, 2025 | ▼ 1.45M |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q1 2025 vs prior quarter
Q1 2025
16
Increased
+18.36M shares23
New Positions
first time holders8
Decreased
−3.01M shares0
Sold Out
fully exitedNet shares change (top 50)
+15.35M
+18.36M / −3.01M
Net new holders
+31
23 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
AMPS insider trading · insider activity
Source: SEC Form 4
0
Buy transactions
23
Sell transactions
0.00
Buy/Sell ratio
$43M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
CBRE Acquisition Sponsor, LLC
| Apr 16, 2025 | D-Return | 27,489,897 | $5.00 | $137.45M | 0 | Form 4 ↗ |
GSO Altus Holdings LP 10 percent owner | Apr 16, 2025 | D-Return | 21,116,125 | $5.00 | $105.58M | 0 | Form 4 ↗ |
Peretz Richard N. director | Apr 16, 2025 | D-Return | 134,620 | $5.00 | $673.1K | 0 | Form 4 ↗ |
Felton Gregg J Co-Founder, CEO & President | Apr 16, 2025 | J-Other | 462,781 | — | — | 3.96M | Form 4 ↗ |
Felton Gregg J Co-Founder, CEO & President | Apr 16, 2025 | D-Return | 1,359,148 | — | — | 2.60M | Form 4 ↗ |
Felton Gregg J Co-Founder, CEO & President | Apr 16, 2025 | J-Other | 9,684,603 | — | — | 2.36M | Form 4 ↗ |
Felton Gregg J Co-Founder, CEO & President | Apr 16, 2025 | D-Return | 49,023 | — | — | 0 | Form 4 ↗ |
Felton Gregg J Co-Founder, CEO & President | Apr 16, 2025 | D-Return | 2,360,000 | — | — | 0 | Form 4 ↗ |
Shapiro Richard A director | Apr 16, 2025 | D-Return | 48,357 | $5.00 | $241.8K | 0 | Form 4 ↗ |
Reich Tina director | Apr 16, 2025 | D-Return | 59,549 | $5.00 | $297.7K | 0 | 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
Altus Power, Inc. (AMPS) is primarily owned by institutional investors, who hold approximately 66.7% of total shares outstanding. Company insiders own approximately 66.71%, while retail and public investors account for the remaining 0.00%.
The largest institutional shareholder of Altus Power, Inc. is BLACKSTONE INC., holding approximately 21.12 million shares — equal to 13.14% of outstanding shares — as of March 31, 2025.
A total of 157 institutional investors currently hold AMPS stock, with a combined institutional value of approximately $529,351,066 as of the most recent 13F filing period.
Frequently asked questions
AMPS ownershipAltus Power, Inc. (AMPS) is primarily owned by institutional investors, who hold approximately 66.7% of shares. The largest shareholder is BLACKSTONE INC. with a 13.14% stake. Company insiders hold 66.71%. Data sourced from SEC Form 13F as of March 31, 2025.