Alphatec Holdings, Inc.
ATEC- Exchange
- Nasdaq
- Industry
- Surgical & Medical Instruments & Apparatus
- SEC CIK
- 0001350653
In the last 90 days, Alphatec Holdings, Inc. insiders filed 3 open-market purchases and 0 sales; 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 | – | Mar 11, 20212 filings | 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
13 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 |
| Nov 12, 2024 | L-5 Healthcare Partners, LLC | 13D/AOld format | – | – | – | SEC |
| Mar 22, 2024 | L-5 Healthcare Partners, LLC | 13D/AOld format | – | – | – | SEC |
| Jan 29, 20245:25 PM ET | BlackRock Inc. | 13GOld format | – | – | – | SEC |
| May 12, 2023 | L-5 Healthcare Partners, LLC | 13D/AOld format | – | – | – | SEC |
| Jan 27, 2023 | L-5 Healthcare Partners, LLC | 13D/AOld format | – | – | – | SEC |
| Jun 29, 2022 | L-5 Healthcare Partners, LLC | 13D/AOld format | – | – | – | SEC |
| Apr 9, 20216:02 PM ET | BlackRock Inc. | 13G/AOld format | – | – | – | SEC |
| Mar 11, 2021 | Squadron Capital LLC | 13DOld format | – | New | – | SEC |
| Feb 2, 20212:56 PM ET | BlackRock Inc. | 13GOld format | – | New | – | SEC |
Form 144: proposed insider sales
83 notices from officers, directors and other affiliates planning to sell Alphatec Holdings, Inc. shares, newest first.
| Filed (ET) | Seller | Shares to sell | Market value | Planned sale | Broker | Filing |
|---|---|---|---|---|---|---|
| Aug 5, 20264:20 PM ET | Tyson MarshallOfficer | 8.17K | $84.5K | Aug 5, 202610b5-1 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| Jun 11, 202611:04 AM ET | McGinnis Karen KDirector | 6.05K | $48.5K | Jun 11, 202610b5-1 | THE CHARLES SCHWAB CORPORATION | SEC |
| Mar 13, 20264:21 PM ET | John Todd KoningOfficer | 79.8K | $997.4K | Mar 13, 202610b5-1 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| Mar 13, 20264:07 PM ET | Scott LishOfficer | 260.5K | $3.21M | Mar 13, 2026 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| Mar 11, 20264:42 PM ET | David SponselOfficer | 163.5K | $2.04M | Mar 11, 202610b5-1 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| Mar 6, 20264:20 PM ET | Craig HunsakerOfficer | 95.0K | $1.16M | Mar 6, 202610b5-1 | Merrill Lynch | SEC |
| Mar 5, 20264:30 PM ET | Tyson MarshallOfficer | 88.8K | $1.15M | Mar 5, 202610b5-1 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| Feb 5, 20264:29 PM ET | David SponselOfficer | 60.4K | $849.6K | Feb 5, 202610b5-1 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| Feb 3, 20261:01 PM ET | Craig HunsakerOfficer | 37.4K | $548.2K | Feb 3, 202610b5-1 | Merrill Lynch | SEC |
| Jan 5, 20264:43 PM ET | Patrick MilesDirector · Officer | 300.0K | $6.23M | Jan 5, 202610b5-1 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| Dec 16, 20254:28 PM ET | Scott LishOfficer | 19.9K | $392.2K | Dec 16, 202510b5-1 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| Dec 11, 202512:24 PM ET | Demski David MDirector | 30.0K | $630.5K | Dec 11, 2025 | Raymond James & Associates | SEC |
| Dec 10, 20254:16 PM ET | David SponselOfficer | 21.1K | $436.3K | Dec 10, 202510b5-1 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| Dec 5, 20254:26 PM ET | Tyson MarshallOfficer | 13.0K | $275.9K | Dec 5, 202510b5-1 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| Dec 5, 20254:15 PM ET | Tyson MarshallOfficer | 9.92K | $213.3K | Dec 5, 2025 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| Dec 5, 20254:11 PM ET | Scott LishOfficer | 10.9K | $233.6K | Dec 5, 2025 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| Dec 1, 202512:26 PM ET | Craig HunsakerOfficer | 32.6K | $6.47MCheck value | Dec 5, 202510b5-1 | Merrill Lynch | SEC |
| Nov 20, 20254:59 PM ET | Tyson MarshallOfficer | 70.0K | $1.37M | Nov 20, 2025 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| Nov 20, 20254:23 PM ET | Scott LishOfficer | 25.0K | $494.9K | Nov 20, 2025 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| Nov 4, 20254:29 PM ET | Rydin Jeffrey PDirector | 200.0K | $3.86M | Nov 3, 2025 | Charles Schwab Corp | SEC |
| Oct 31, 20255:33 PM ET | Craig HunsakerOfficer | 100.0K | $1.99M | Oct 31, 202510b5-1 | Merrill Lynch | SEC |
| Oct 24, 20254:27 PM ET | David SponselOfficer | 70.0K | $1.11M | Oct 24, 202510b5-1 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| Oct 1, 20254:34 PM ET | Patrick MilesDirector · Officer | 300.0K | $4.36M | Oct 1, 202510b5-1 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| Sep 19, 20254:26 PM ET | David SponselOfficer | 2.56K | $38.9K | Sep 19, 202510b5-1 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| Sep 18, 20254:28 PM ET | David SponselOfficer | 137.4K | $2.02M | Sep 18, 202510b5-1 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
Showing the latest 25. See the ATEC notices from the last 12 months