- Quarter end
- 31 Mar 2026
- the date the book describes
- Filed
- 27 Oct 2026
- latest of these filings; the earliest 12 May 2026
- Managers listing it
- 19
- at least, of 95 tracked, among listed positions
- Comparable managers
- 91
- filed both Q4 2025 and Q1 2026; 3 listed it in both
- Shares listed
- 4,650,871
- combined, among listed positions
- Reported value
- $183m
- combined, at the quarter end
AllianceBernstein LP. Values in this filing are at the previous quarter end's prices; its share count is the quarter end's.
Among the 91 comparable managers: 12 buyers (opened or added shares) and 13 sellers (trimmed or exited), at least, among listed positions. Their net change in shares was -1,590,029.
Managers listing ACMR in Q1 2026
19 of 19 holders
Largest increases and reductions, by shares
Increases
- T. Rowe Price Associates Incexisting position · 216,955 shares now+169,606
- Citadel Advisors LLCexisting position · 203,378 shares now+60,356
- Two Sigma Investments LPnew position · 52,416 shares now+52,416
- Balyasny Asset Management LLCnew position · 47,076 shares now+47,076
- Millennium Management LLCexisting position · 65,560 shares now+42,060
Reductions
- Southeastern Asset Management Incexisting position · 782,900 shares now-897,281
- Invesco Ltdexisting position · 787,101 shares now-555,035
- Fidelity (FMR LLC)existing position · 629,244 shares now-174,422
- AQR Capital Management LLCexisting position · 323,412 shares now-20,191
- Walleye Capital LLCexisting position · 871 shares now-5,354
New positions and exits
New (4)
Exited (6)
- Discovery Capital Management LLCwas $12m
- Verition Fund Management LLCwas $2.6m
- D. E. Shaw & Co.was $1.2m
- Freestone Grove Partners LPwas $401k
- PDT Partners LLCwas $246k
- Man Group PLCwas $209k
Ownership over time
Tracked managers listing it, at least.
| Quarter | Holders | Reported value | Buyers | Sellers |
|---|---|---|---|---|
| Q1 2020 | 1 | $48k | n.a. | n.a. |
| Q3 2020 | 2 | $23m | n.a. | n.a. |
| Q4 2020 | 3 | $36m | n.a. | n.a. |
| Q1 2021 | 2 | $3.4m | n.a. | n.a. |
| Q2 2021 | 1 | $22k | n.a. | n.a. |
| Q3 2021 | 1 | $24k | n.a. | n.a. |
| Q4 2021 | 1 | $19k | n.a. | n.a. |
| Q1 2022 | 1 | $14k | n.a. | n.a. |
| Q2 2022 | 1 | $11k | n.a. | n.a. |
| Q3 2022 | 1 | $8k | n.a. | n.a. |
| Q4 2022 | 3 | $1.6m | n.a. | n.a. |
| Q1 2023 | 2 | $1.2m | n.a. | n.a. |
| Q2 2023 | 1 | $1.0m | n.a. | n.a. |
| Q3 2023 | 2 | $14m | n.a. | n.a. |
| Q4 2023 | 2 | $15m | 0 | 2 |
| Q1 2024 | 1 | $25m | 1 | 0 |
| Q2 2024 | 1 | $20m | 1 | 0 |
| Q3 2024 | 2 | $16m | 1 | 1 |
| Q4 2024 | 3 | $8.4m | 3 | 0 |
| Q1 2025 | 4 | $27m | 3 | 1 |
| Q2 2025 | 2 | $33m | 2 | 1 |
| Q3 2025 | 4 | $66m | 3 | 1 |
| Q4 2025 | 5 | $125m | 12 | 17 |
| Q1 2026 | 3 | $78m | 12 | 13 |
| Q2 2026 | 6 | $411m | 17 | 8 |
Compare with…
Holders over time, buyers and sellers, and the managers holding both, side by side for up to four stocks.
ACMR and GE →ACMR and LRCX →ACMR and GEV →Choose a stock to compare with ACMR →
How much of the picture this is
A 13F is a manager’s long US-listed equity book at a quarter end, filed up to 45 days later. It shows no shorts, cash, bonds or performance, and it is never today’s portfolio. Large books are listed to their largest positions, so a manager missing from this table may still hold a small position below that line. These are 95 tracked managers, not the institutional market.
Which funds own ACMR, latest filings →Back to the 13F Explorer →