- Quarter end
- 31 Dec 2023
- the date the book describes
- Filed
- 14 Feb 2024
- latest of these filings; the earliest 12 Feb 2024
- Managers listing it
- 4
- at least, of 95 tracked, among listed positions
- Comparable managers
- 93
- filed both Q3 2023 and Q4 2023; 3 listed it in both
- Shares listed
- 3,885,970
- combined, among listed positions
- Reported value
- $66m
- combined, at the quarter end
Among the 93 comparable managers: 1 buyer (opened or added shares) and 1 seller (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 BLCO in Q4 2023
4 of 4 holders
| Action | Filing | |||||
|---|---|---|---|---|---|---|
| Carl C. Icahn | 3,500,000 | $60m | 0.55% | Held | 0 | 14 Feb 2024 (the filing on sec.gov) |
| Woodline Partners LP | 309,491 | $5.3m | 0.06% | Held | 0 | 14 Feb 2024 (the filing on sec.gov) |
| PDT Partners LLC | 51,849 | $885k | 0.10% | New | new | 14 Feb 2024 (the filing on sec.gov) |
| Winton Group Ltd | 24,630 | $420k | under 0.1% | Trimmed | -235 | 12 Feb 2024 (the filing on sec.gov) |
Largest increases and reductions, by shares
Increases
- PDT Partners LLCnew position · 51,849 shares now+51,849
Reductions
- Winton Group Ltdexisting position · 24,630 shares now-235
New positions and exits
New (1)
- PDT Partners LLC$885k
Exited (0)
No exit shown by a manager’s own filing.
Ownership over time
Tracked managers listing it, at least.
| Quarter | Holders | Reported value | Buyers | Sellers |
|---|---|---|---|---|
| Q2 2022 | 3 | $63m | n.a. | n.a. |
| Q3 2022 | 4 | $100m | n.a. | n.a. |
| Q4 2022 | 2 | $63m | n.a. | n.a. |
| Q1 2023 | 2 | $90m | n.a. | n.a. |
| Q2 2023 | 3 | $87m | n.a. | n.a. |
| Q3 2023 | 4 | $69m | n.a. | n.a. |
| Q4 2023 | 4 | $66m | 1 | 1 |
| Q1 2024 | 4 | $73m | 3 | 0 |
| Q2 2024 | 5 | $74m | 2 | 1 |
| Q3 2024 | 5 | $97m | 2 | 2 |
| Q4 2024 | 5 | $82m | 1 | 3 |
| Q1 2025 | 3 | $59m | 2 | 0 |
| Q2 2025 | 4 | $101m | 3 | 0 |
| Q3 2025 | 7 | $158m | 4 | 0 |
| Q4 2025 | 7 | $198m | 17 | 6 |
| Q1 2026 | 5 | $178m | 11 | 12 |
| Q2 2026 | 6 | $203m | 16 | 7 |
Compare with…
Holders over time, buyers and sellers, and the managers holding both, side by side for up to four stocks.
BLCO and LLY →BLCO and JNJ →BLCO and VRTX →Choose a stock to compare with BLCO →
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 BLCO, latest filings →Back to the 13F Explorer →