- Quarter end
- 31 Mar 2023
- the date the book describes
- Filed
- 16 May 2023
- latest of these filings; the earliest 3 May 2023
- Managers listing it
- 3
- at least, of 95 tracked, among listed positions
- Comparable managers
- 93
- filed both Q4 2022 and Q1 2023; 2 listed it in both
- Shares listed
- 806,811
- combined, among listed positions
- Reported value
- $1.4m
- combined, at the quarter end
Managers listing OPEN in Q1 2023
Share of 13F value is the position’s reported value over everything the manager reported that quarter. The share change is against Q4 2022, and only where both filings list the position. A rise in value with no rise in shares is the price, not buying.
3 of 3 holders
| Action | Filing | |||||
|---|---|---|---|---|---|---|
| Sachem Head Capital Management LP | 485,000 | $854k | under 0.1% | Held | 0 | 15 May 2023 (the filing on sec.gov) |
| Tybourne Capital Management HK Ltd | 314,611 | $554k | 0.06% | New | new | 15 May 2023 (the filing on sec.gov) |
| Baillie Gifford & Co | 7,200 | $13k | under 0.1% | Held | 0 | 3 May 2023 (the filing on sec.gov) |
Largest increases and reductions, by shares
Q4 2022 to Q1 2023, among managers that listed it in both quarters or opened it.
Increases
- Tybourne Capital Management HK Ltdnew position · 314,611 shares now+314,611
Reductions
No reduction among listed positions.
New positions and exits
At least these many: a manager is shown exiting only where its own filing shows the position gone.
New (1)
Exited (2)
- Altimeter Capital Management LPwas $13m
- Ruane Cunniff & Goldfarb LPwas $20k
Ownership over time
Every quarter on file. A quarter-end value moves with the price as well as with the shares held; buyers and sellers count comparable managers, by shares.
4 in Q1 2024 to 1 in Q2 2026
Tracked managers listing it, at least.
the quarter shown share split complete books; unmarked quarters rest on listed positionsClick a quarter to open it.
| 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 →