Security key
02081G201
Alphatec Holdings, Inc. - Common Stock, par value $0.0001 per share (ATEC)
CUSIP: 02081G201
Q4 2025 13F Holders as of 31 Dec 2025
- Security type / class
- Equity / Common Stock, par value $0.0001 per share
- Total 13F shares
- 119,421,809
- Total 13F value
- $2,512,526,352
- Share change
- +10,205,910
- Put/Call ratio
- 17%
- SEC-reported price per share
- $21.04
- Number of holders
- 283
- Value change
- +$234,953,104
- Number of buys
- 135
- Number of sells
- 129
- Shares outstanding
- 148,491,921
Holder snapshot
7 signals
Open additional details 1 more signal available
Security identity
Names, identifiers, and filing context for this profile.
1 source field
Report period
Q4 2025
Institutions
283
Top holders
10
ATEC full security history
Ownership snapshot
Full 13F holder table
Alphatec Holdings, Inc. SEC filings
Alphatec Holdings, Inc. company facts
Broader feeds
Ownership snapshot
Top reported holders of ATEC - Alphatec Holdings, Inc. - Common Stock, par value $0.0001 per share (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
Squadron Capital LLC
Disclosed value leader
Squadron Capital LLC
Comparable rows
2/15
Latest evidence
15 Dec 2025
13D/G
3/4/5
13F
Lead comparable stake: 8.9%
13 rows are not safely comparable across share classes.
13D/G row: Squadron Capital LLC
Showing 1-6 of 15 holder rows.
Quick read
Squadron Capital LLC leads the comparable SEC ownership view at 8.9%.
2 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens Squadron Capital LLC's linked filing trail.
Comparable ownership
Top 2
Squadron Capital LLC
8.9%
L-5 Healthcare Partners, LLC
5%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-6 of 15 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| Squadron Capital LLC |
13D/G
3/4/5
Jennifer N. Pritzker · 10%+ Owner
|
8.9%
Reported 13D/G
· 15 Dec 2025
|
$259,293,623
13,215,781 shares
|
$0 | 15 Dec 2025 |
| L-5 Healthcare Partners, LLC |
3/4/5
13D/G
Director by deputization, 10%+ Owner
|
5%
Reported 13D/G
· 23 Apr 2025
|
$166,223,070
11,081,538 shares
|
— | 10 May 2023 |
| Jennifer N. Pritzker |
3/4/5
10%+ Owner
|
—
denominator unverified
|
$225,036,896
10,703,045 shares
|
-$15,650,098 | 08 Dec 2025 |
| Squadron Capital Holdings LLC |
3/4/5
10%+ Owner
|
—
denominator unverified
|
$223,865,296
10,645,045 shares
|
-$15,650,098 | 08 Dec 2025 |
| BlackRock, Inc. |
13F
Company
|
—
denominator unverified
|
$150,784,120
10,370,297 shares
|
— | 30 Sep 2025 |
| Paul Segal |
3/4/5
Director
|
—
denominator unverified
|
$147,384,455
11,081,538 shares
|
— | 15 Jun 2023 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
13F holder rows
Institutional holders as of Q4 2025
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
283
Shares
119,421,809
Rows available
283
| Investor | Option | Weight % | Change % | SEC-reported value | * Price | Shares | Share Change | Activity | Report Period |
|---|
* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.
Compare Q4 2025 vs Q3 2025 Across Filers
Q3 2025 holders
269
Q4 2025 holders
283
Holder diff
14
| Investor | Q3 2025 Shares | Q4 2025 Shares | Share Diff | Share Chg % | Q3 2025 value | Q4 2025 value | Value change | Value Chg % |
|---|