Institutional HoldersBeta
Who holds a company, from every 13F filed for the quarter, one row per filer exactly as filed, against the latest share count the company reported.
Share classes (cover page of the 10-K filed 2025-03-17, as of 2025-03-04)
| Class | Listed | Shares outstanding | Held by 13F filers | % of class | Holders | CUSIP |
|---|---|---|---|---|---|---|
| Common stock | AMPS · NYSE | 160,420,894 | — | — |
Each class is compared with its own share count; classes are not added together. A class that is not exchange-listed cannot be held by 13F filers.
Top holders (0 of 0 · )
change vs 2026-03-31No 13F holders for the selected CUSIPs this quarter.
Large holders from 13D/13G (latest per reporting person, last 2 years)
Filed when a holder crosses 5% or changes materially, so often more current than the quarter-end 13F. Percentages are the filer's own, against the share count they used.
| Reporting person | Form | Filed | Event | Shares | % of class |
|---|---|---|---|---|---|
| Encompass Capital Advisors LLC | SCHEDULE 13G | 2025-10-29 | 2025-10-22 | 1,505,037 | 5.85% |
| Todd J. Kantor | SCHEDULE 13G | 2025-10-29 | 2025-10-22 | 1,505,037 | 5.85% |
| Encompass Capital Partners LLC | SCHEDULE 13G | 2025-10-29 | 2025-10-22 | 1,192,667 | 4.63% |
| Paul J. Glazer | SCHEDULE 13G/A | 2025-05-15 | 2025-03-31 | 13,973,968 | 8.71% |
| Glazer Capital, LLC | SCHEDULE 13G/A | 2025-05-15 | 2025-03-31 | 13,973,968 | 8.71% |
| CBRE Acquisition Sponsor, LLC | SCHEDULE 13D/A | 2025-04-18 | 2025-04-15 | 0 | 0% |
| CBRE Services, Inc. | SCHEDULE 13D/A | 2025-04-18 | 2025-04-15 | 0 | 0% |
| CBRE Group, Inc. | SCHEDULE 13D/A | 2025-04-18 | 2025-04-15 | 0 | 0% |
| Blackstone Group Management L.L.C. | SCHEDULE 13D/A | 2025-04-18 | 2025-04-16 | 0 | 0% |
| Blackstone Inc. | SCHEDULE 13D/A | 2025-04-18 | 2025-04-16 | 0 | 0% |
| GSO Altus Holdings Associates LLC | SCHEDULE 13D/A | 2025-04-18 | 2025-04-16 | 0 | 0% |
| GSO Altus Holdings LP | SCHEDULE 13D/A | 2025-04-18 | 2025-04-16 | 0 | 0% |
| GSO Holdings I L.L.C. | SCHEDULE 13D/A | 2025-04-18 | 2025-04-16 | 0 | 0% |
| Blackstone Holdings II L.P. | SCHEDULE 13D/A | 2025-04-18 | 2025-04-16 | 0 | 0% |
| Stephen A. Schwarzman | SCHEDULE 13D/A | 2025-04-18 | 2025-04-16 | 0 | 0% |
| Blackstone Holdings I/II GP L.L.C. | SCHEDULE 13D/A | 2025-04-18 | 2025-04-16 | 0 | 0% |
| Gregg Felton | SCHEDULE 13D/A | 2025-04-16 | 2025-04-16 | 0 | 0% |
| NORELL LARS | SCHEDULE 13D/A | 2025-02-11 | 2025-02-07 | 6,598,766 | 4.1% |
Source: SEC Form 13F-HR information tables for the quarter ending 2026-06-30 (filed within 45 days of quarter end; amendments applied; values normalised to dollars), the share count from the company's latest 10-K/10-Q XBRL cover page, and Schedule 13D/13G filings. Each row is a legal 13F filer as filed — related entities (e.g. Vanguard's advisers) are not merged. Retail brokerage accounts are not reported on 13F, so the remainder is mostly retail and insiders.