- Quarter end
- 30 Jun 2026
- the date the book describes
- Filed
- 27 Oct 2026
- latest of these filings; the earliest 3 Aug 2026
- Managers listing it
- 24
- at least, of 95 tracked, among listed positions
- Comparable managers
- 91
- filed both Q1 2026 and Q2 2026; 2 listed it in both
- Shares listed
- 38,565,497
- combined, among listed positions
- Reported value
- $178m
- 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: 11 buyers (opened or added shares) and 16 sellers (trimmed or exited), at least, among listed positions. Their net change in shares was -42,503,671.
Managers listing OPEN in Q2 2026
24 of 24 holders
Largest increases and reductions, by shares
Increases
- T. Rowe Price Associates Incexisting position · 6,190,566 shares now+5,845,792
- Susquehanna International Group LLPexisting position · 6,494,560 shares now+3,157,558
- Walleye Capital LLCexisting position · 1,568,959 shares now+1,568,941
- AllianceBernstein LPexisting position · 1,001,200 shares now+983,200
- Man Group PLCexisting position · 424,515 shares now+269,071
Reductions
- Jane Street Group LLCexisting position · 95,097 shares now-14,621,933
- D. E. Shaw & Co.existing position · 121,686 shares now-11,108,491
- Millennium Management LLCexisting position · 118,156 shares now-10,718,272
- Two Sigma Investments LPexisting position · 2,656,469 shares now-4,117,563
- Voloridge Investment Management LLCexisting position · 1,004,490 shares now-3,309,347
New positions and exits
New (4)
Exited (5)
- Brevan Howard Capital Management LPwas $7.7m
- Tudor Investment Corpwas $3.0m
- Hudson Bay Capital Management LPwas $1.3m
- Schonfeld Strategic Advisors LLCwas $973k
- Polen Capital Management LLCwas $82k
Ownership over time
Tracked managers listing it, at least.
| Quarter | Holders | Reported value | Buyers | Sellers |
|---|---|---|---|---|
| Q4 2020 | 6 | $226m | n.a. | n.a. |
| Q1 2021 | 5 | $593m | n.a. | n.a. |
| Q2 2021 | 5 | $512m | n.a. | n.a. |
| Q3 2021 | 9 | $1.1bn | n.a. | n.a. |
| Q4 2021 | 10 | $1.2bn | n.a. | n.a. |
| Q1 2022 | 9 | $843m | n.a. | n.a. |
| Q2 2022 | 8 | $415m | n.a. | n.a. |
| Q3 2022 | 6 | $220m | n.a. | n.a. |
| Q4 2022 | 5 | $14m | n.a. | n.a. |
| Q1 2023 | 3 | $1.4m | n.a. | n.a. |
| Q2 2023 | 7 | $134m | n.a. | n.a. |
| Q3 2023 | 5 | $113m | n.a. | n.a. |
| Q4 2023 | 5 | $184m | 2 | 3 |
| Q1 2024 | 4 | $103m | 3 | 1 |
| Q2 2024 | 2 | $45m | 0 | 2 |
| Q3 2024 | 1 | $38m | 0 | 2 |
| Q1 2025 | 1 | $1.6m | 1 | 0 |
| Q3 2025 | 3 | $456m | 3 | 0 |
| Q4 2025 | 3 | $273m | 18 | 10 |
| Q1 2026 | 4 | $83m | 17 | 10 |
| Q2 2026 | 1 | $42m | 11 | 16 |
Compare with…
Holders over time, buyers and sellers, and the managers holding both, side by side for up to four stocks.
OPEN and WELL →OPEN and EQIX →OPEN and BN →Choose a stock to compare with OPEN →
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 OPEN, latest filings →Back to the 13F Explorer →