Alphatec Holdings, Inc.
ATEC- Exchange
- Nasdaq
- Industry
- Surgical & Medical Instruments & Apparatus
- SEC CIK
- 0001350653
In the last 90 days, Alphatec Holdings, Inc. insiders filed 1 open-market purchase and 1 sale; 267 institutions reported holding it in 13F filings for Q2 2026, worth $966.6M in total; no superinvestor holds it.
Holders of 5% or more of ATEC
Holders whose latest Schedule 13D or 13G filing reports 5% or more of Alphatec Holdings, Inc., largest stake first. The change is against the holder's previous filing.
| Holder | Latest form | Stake | Change | First filed | Latest filing | Filing |
|---|---|---|---|---|---|---|
| Squadron Capital LLC | 13D/A | 8.90%13.2M shares | – | Dec 17, 20251 filing | Dec 17, 2025 | SEC |
Stakes are as of each holder's latest filing. Holders whose last filing was in the old format (before December 18, 2024) have no stake on record and are not listed, and after an acquisition or delisting holders usually stop filing.
13D and 13G filings
4 Schedule 13D and 13G filings on Alphatec Holdings, Inc., newest first, including old-format filings without a stake.
| Filed (ET) | Filer | Form | Stake | Change | Event date | Filing |
|---|---|---|---|---|---|---|
| Dec 17, 20256:25 PM ET | Squadron Capital LLCand 3 others | 13D/A | 8.90%13.2M shares | – | Dec 15, 2025 | SEC |
| Apr 23, 20259:45 PM ET | L-5 Healthcare Partners, LLCand 1 other | 13D/A | 4.96%7.20M shares | −0.34 ppfrom 5.30%Below 5% | Apr 23, 2025 | SEC |
| Apr 11, 20258:34 PM ET | L-5 Healthcare Partners, LLCand 1 other | 13D/A | 5.30%7.70M shares | −1.15 ppfrom 6.45% | Apr 9, 2025 | SEC |
| Feb 6, 20259:01 AM ET | L-5 Healthcare Partners, LLCand 1 other | 13D/A | 6.45%9.21M shares | – | Feb 4, 2025 | SEC |
Form 144: proposed insider sales
Notices from officers, directors and other affiliates planning to sell Alphatec Holdings, Inc. shares.
No Form 144 notices for Alphatec Holdings, Inc. are on file.