- Quarter end
- 31 Dec 2024
- the date the book describes
- Filed
- 14 Feb 2025
- latest of these filings; the earliest 11 Feb 2025
- Managers listing it
- 9
- at least, of 95 tracked, among listed positions
- Comparable managers
- 94
- filed both Q3 2024 and Q4 2024; 7 listed it in both
- Shares listed
- 8,750,572
- combined, among listed positions
- Reported value
- $343m
- combined, at the quarter end
Among the 94 comparable managers: 5 buyers (opened or added shares) and 3 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 ATMU in Q4 2024
9 of 9 holders
| Action | Filing | |||||
|---|---|---|---|---|---|---|
| T. Rowe Price Associates Inc | 4,262,408 | $167m | under 0.1% | Added | +223,712 | 14 Feb 2025 (the filing on sec.gov) |
| D. E. Shaw & Co. | 1,911,153 | $75m | 0.05% | Added | n.a. | 14 Feb 2025 (the filing on sec.gov) |
| MFS Investment Management | 1,249,812 | $49m | under 0.1% | Added | +81,502 | 12 Feb 2025 (the filing on sec.gov) |
| Two Sigma Advisers LP | 601,698 | $24m | 0.05% | Trimmed | -216,100 | 14 Feb 2025 (the filing on sec.gov) |
| Verition Fund Management LLC | 297,115 | $12m | under 0.1% | Added | +23,427 | 14 Feb 2025 (the filing on sec.gov) |
| Acadian Asset Management LLC | 268,813 | $11m | under 0.1% | Trimmed | -103,519 | 11 Feb 2025 (the filing on sec.gov) |
| Quantbot Technologies LP | 77,735 | $3.0m | 0.11% | Added | +34,421 | 11 Feb 2025 (the filing on sec.gov) |
| PDT Partners LLC | 74,741 | $2.9m | 0.26% | Trimmed | -27 | 14 Feb 2025 (the filing on sec.gov) |
| Freestone Grove Partners LP | 7,097 | $278k | under 0.1% | Held | n.a. | 14 Feb 2025 (the filing on sec.gov) |
Largest increases and reductions, by shares
Increases
- T. Rowe Price Associates Incexisting position · 4,262,408 shares now+223,712
- MFS Investment Managementexisting position · 1,249,812 shares now+81,502
- Quantbot Technologies LPexisting position · 77,735 shares now+34,421
- Verition Fund Management LLCexisting position · 297,115 shares now+23,427
Reductions
- Two Sigma Advisers LPexisting position · 601,698 shares now-216,100
- Acadian Asset Management LLCexisting position · 268,813 shares now-103,519
- PDT Partners LLCexisting position · 74,741 shares now-27
New positions and exits
New (0)
No new position among listed positions.
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 2023 | 2 | $1.2m | n.a. | n.a. |
| Q4 2023 | 1 | $585k | 1 | 0 |
| Q1 2024 | 10 | $287m | 10 | 0 |
| Q2 2024 | 8 | $154m | 5 | 4 |
| Q3 2024 | 9 | $266m | 3 | 7 |
| Q4 2024 | 9 | $343m | 5 | 3 |
| Q1 2025 | 6 | $152m | 4 | 2 |
| Q2 2025 | 8 | $191m | 5 | 3 |
| Q3 2025 | 6 | $365m | 2 | 4 |
| Q4 2025 | 7 | $410m | 19 | 14 |
| Q1 2026 | 12 | $660m | 19 | 11 |
| Q2 2026 | 6 | $504m | 10 | 21 |
Compare with…
Holders over time, buyers and sellers, and the managers holding both, side by side for up to four stocks.
ATMU and AMZN →ATMU and TSLA →ATMU and HD →Choose a stock to compare with ATMU →
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 ATMU, latest filings →Back to the 13F Explorer →