- Quarter end
- 30 Sep 2025
- the date the book describes
- Filed
- 27 Oct 2026
- latest of these filings; the earliest 29 Oct 2025
- Managers listing it
- 16
- at least, of 95 tracked, among listed positions
- Comparable managers
- 95
- filed both Q2 2025 and Q3 2025; 12 listed it in both
- Shares listed
- 46,143,486
- combined, among listed positions
- Reported value
- $3.2bn
- combined, at the quarter end
Among the 95 comparable managers: 8 buyers (opened or added shares) and 9 sellers (trimmed or exited), at least, among listed positions. Their net change in shares is not known from listed positions, because at least one of them lists it in only one of the two quarters.
Managers listing COO in Q3 2025
16 of 16 holders
Largest increases and reductions, by shares
Increases
- Jana Partnersnew position · 2,434,607 shares now+2,434,607
- Capital World Investorsexisting position · 10,551,592 shares now+2,159,233
- MFS Investment Managementexisting position · 3,099,750 shares now+1,525,693
- Millennium Management LLCexisting position · 2,177,918 shares now+226,738
- Winton Group Ltdnew position · 83,284 shares now+83,284
Reductions
- T. Rowe Price Associates Incexisting position · 3,797,253 shares now-2,750,065
- Neuberger Berman Group LLCexisting position · 3,878,855 shares now-1,185,151
- AllianceBernstein LPexisting position · 3,190,534 shares now-594,374
- Holocene Advisors LPexisting position · 1,717,723 shares now-328,977
- Janus Henderson Group Ltdexisting position · 3,423,213 shares now-297,078
New positions and exits
New (2)
- Jana Partners$167m
- Winton Group Ltd$5.7m
Exited (2)
- Tudor Investment Corpwas $25m
- Glenview Capital Management LLCwas $20m
Ownership over time
Tracked managers listing it, at least.
| Quarter | Holders | Reported value | Buyers | Sellers |
|---|---|---|---|---|
| Q1 2024 | 21 | $3.0bn | 21 | 0 |
| Q2 2024 | 19 | $2.5bn | 10 | 9 |
| Q3 2024 | 19 | $3.3bn | 7 | 11 |
| Q4 2024 | 16 | $2.9bn | 6 | 9 |
| Q1 2025 | 19 | $3.2bn | 14 | 6 |
| Q2 2025 | 21 | $3.0bn | 13 | 8 |
| Q3 2025 | 16 | $3.2bn | 8 | 9 |
| Q4 2025 | 17 | $3.4bn | 13 | 20 |
| Q1 2026 | 13 | $2.6bn | 11 | 19 |
| Q2 2026 | 19 | $2.6bn | 24 | 9 |
Compare with…
Holders over time, buyers and sellers, and the managers holding both, side by side for up to four stocks.
COO and LLY →COO and JNJ →COO and VRTX →Choose a stock to compare with COO →
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 COO, latest filings →Back to the 13F Explorer →