Alphatec Holdings
ATEC
283 hedge funds and large institutions have $2.51B invested in Alphatec Holdings in 2025 Q4 according to their latest regulatory filings, with 44 funds opening new positions, 99 increasing their positions, 100 reducing their positions, and 29 closing their positions.
488% more call options, than puts
Call options by funds: $170M | Put options by funds: $28.9M
59% more capital invested
Capital invested by funds: $1.57B → $2.51B (+$937M)
52% more first-time investments, than exits
New positions opened: 44 | Existing positions closed: 29
20% more funds holding in top 10
Funds holding in top 10: 5 → 6 (+1)
7.22% more ownership
Funds ownership: 73.14% → 80.36% (+7.2%)
3% more funds holding
Funds holding: 274 → 283 (+9)
1% less repeat investments, than reductions
Existing positions increased: 99 | Existing positions reduced: 100
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Millennium Management
New York
|
+$30.7M |
| 2 |
TCG
Tremblant Capital Group
West Palm Beach,
Florida
|
+$30.1M |
| 3 |
DCM
Driehaus Capital Management
Chicago,
Illinois
|
+$26.8M |
| 4 |
ITP
Iron Triangle Partners
Cos Cob,
Connecticut
|
+$23.8M |
| 5 |
Citadel Advisors
Miami,
Florida
|
+$21.3M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
B
Braidwell
Stamford,
Connecticut
|
-$22M |
| 2 |
Prudential Financial
Newark,
New Jersey
|
-$14.7M |
| 3 |
IECM
Intrinsic Edge Capital Management
Chicago,
Illinois
|
-$14.6M |
| 4 |
Macquarie Group
Sydney, NSW 2000,
Australia
|
-$11.8M |
| 5 |
Bank of America
Charlotte,
North Carolina
|
-$10.5M |
ATEC Hedge Fund Activity: Q4 2025 in Review
283 of the 8,267 institutional investors tracked by Wall St. Rank reported a position in Alphatec Holdings (ATEC) for Q4 2025, worth a combined $2.51B — up 59% from $1.57B a quarter earlier.
Buyers outnumbered sellers: 44 funds opened new ATEC positions and 29 closed out — a net gain of 15 holders — while 99 added to existing stakes and 100 trimmed.
The largest buyer was Millennium Management, adding an estimated $30.7M. The largest seller was Braidwell, exiting entirely with an estimated $22M sold.
- 283 institutional investors held Alphatec Holdings (ATEC) as of Q4 2025, up from 274 in Q3 2025.
- Funds reported $2.51B of Alphatec Holdings stock for Q4 2025, up 59% quarter-over-quarter.
- 44 funds opened new Alphatec Holdings positions in Q4 2025 and 29 closed out, a net change of +15 holders.
- The largest Alphatec Holdings buyer in Q4 2025 was Millennium Management, an estimated $30.7M added.
- The largest Alphatec Holdings seller in Q4 2025 was Braidwell, an estimated $22M sold.
Based on aggregated 13F filings for Q4 2025.