ATI
470 hedge funds and large institutions have $10.5B invested in ATI in 2025 Q3 according to their latest regulatory filings, with 91 funds opening new positions, 151 increasing their positions, 154 reducing their positions, and 87 closing their positions.
5% more first-time investments, than exits
New positions opened: 91 | Existing positions closed: 87
0% more funds holding in top 10
Funds holding in top 10: 9 → 9 (0)
0% less funds holding
Funds holding: 471 → 470 (-1)
2% less repeat investments, than reductions
Existing positions increased: 151 | Existing positions reduced: 154
6% less call options, than puts
Call options by funds: $109M | Put options by funds: $116M
1.56% less ownership
Funds ownership: 95% → 93.44% (-1.6%)
9% less capital invested
Capital invested by funds: $11.6B → $10.5B (-$1.08B)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Fidelity Investments
Boston,
Massachusetts
|
+$120M |
| 2 |
Capital World Investors
Los Angeles,
California
|
+$87.5M |
| 3 |
Holocene Advisors
New York
|
+$75.3M |
| 4 |
RCMU
Rokos Capital Management (UK)
London,
United Kingdom
|
+$42.7M |
| 5 |
Capital International Investors
Los Angeles,
California
|
+$35.3M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
PCM
Palestra Capital Management
New York
|
-$91.7M |
| 2 |
Fuller & Thaler Asset Management
San Mateo,
California
|
-$78.7M |
| 3 |
Ameriprise
Minneapolis,
Minnesota
|
-$64.4M |
| 4 |
CHP
Castle Hook Partners
New York
|
-$64.3M |
| 5 |
FCM
Frontier Capital Management
Boston,
Massachusetts
|
-$54.4M |
ATI Hedge Fund Activity: Q3 2025 in Review
470 of the 7,619 institutional investors tracked by Wall St. Rank reported a position in ATI (ATI) for Q3 2025, worth a combined $10.5B — down 9.4% from $11.6B a quarter earlier.
Buyers outnumbered sellers: 91 funds opened new ATI positions and 87 closed out — a net gain of 4 holders — while 151 added to existing stakes and 154 trimmed.
The largest buyer was Fidelity Investments, adding an estimated $120M. The largest seller was Palestra Capital Management, exiting entirely with an estimated $91.7M sold.
- 470 institutional investors held ATI (ATI) as of Q3 2025, down from 471 in Q2 2025.
- Funds reported $10.5B of ATI stock for Q3 2025, down 9.4% quarter-over-quarter.
- 91 funds opened new ATI positions in Q3 2025 and 87 closed out, a net change of +4 holders.
- The largest ATI buyer in Q3 2025 was Fidelity Investments, an estimated $120M added.
- The largest ATI seller in Q3 2025 was Palestra Capital Management, an estimated $91.7M sold.
Based on aggregated 13F filings for Q3 2025.