Alphatec Holdings, Inc. Insider Trading Activity
Every SEC Form 4 insider transaction reported for Alphatec Holdings, Inc. (ATEC), sourced directly from SEC EDGAR and updated as new filings are accepted.
By Trabud · Insider-trading data from SEC EDGAR
Latest filing:
Compiled automatically from SEC EDGAR Form 4 filings and refreshed daily. Figures count purchases (code P) and sales (code S) only — not grants, option exercises, or gifts. How this page is built. Not investment advice.
Quick Answer
Are ATEC insiders buying or selling?
In the last 12 months, Alphatec Holdings, Inc. insiders reported 2 open-market purchases ($2.0M) and 37 sales ($95.8M) — net selling of $93.8M. Since March 2019, Trabud has recorded 207 Form 4 filings for ATEC: 45 buys ($102.4M) and 162 sells ($1.2B).
Source: SEC EDGAR Form 4
What stands out
- The largest open-market purchase in the last 12 months was $1.0M by Patrick Miles (CEO) on Sep 11, 2026. SEC ↗
- The most recent open-market purchase was reported on Sep 11, 2026 (38 days ago).
Key Statistics (March 2019 – Sep 11, 2026)
Total Form 4 filings
207
SEC EDGAR
Insider filers
27
Insider buys (45)
$102.4M
Insider sells (162)
$1.2B
Insider sentiment
Net sellingNet insider flow of $1.1B in net selling since March 2019, and $93.8M in net selling over the last 12 months. 1 insider buy in the last 90 days.
Recent ATEC insider transactions
| Date | Insider | Role | Type | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| Sep 11, 2026 | Patrick Miles | CEO | Purchase | 115.0K | $8.81 | $1.0M | SEC ↗ |
| Aug 8, 2026 | Tyson Eliot Marshall | GENERAL COUNSEL & CORP. SEC. | Sale | 8.2K | $9.65 | $78.8K | SEC ↗ |
| Jun 12, 2026 | Karen K Mcginnis | Director | Sale | 6.0K | $8.01 | $48.5K | SEC ↗ |
| May 11, 2026 | Keith Valentine | Director | Purchase | 135.0K | $7.38 | $996.2K | SEC ↗ |
| Mar 17, 2026 | John Todd Koning | CHIEF FINANCIAL OFFICER | Sale | 79.8K | $12.36 | $986.2K | SEC ↗ |
| Mar 17, 2026 | Scott Lish | CHIEF OPERATING OFFICER | Sale | 260.5K | $12.30 | $3.2M | SEC ↗ |
| Mar 13, 2026 | David Sponsel | EVP, SALES | Sale | 163.5K | $12.52 | $2.0M | SEC ↗ |
| Mar 10, 2026 | Craig E Hunsaker | EVP, PEOPLE & CULTURE | Sale | 116.4K | $12.38 | $1.4M | SEC ↗ |
| Mar 9, 2026 | Tyson Eliot Marshall | GENERAL COUNSEL & CORP. SEC. | Sale | 88.8K | $12.49 | $1.1M | SEC ↗ |
| Feb 6, 2026 | David Sponsel | EVP, SALES | Sale | 60.4K | $13.79 | $833.3K | SEC ↗ |
| Feb 5, 2026 | Craig E Hunsaker | EVP, PEOPLE & CULTURE | Sale | 37.4K | $14.71 | $549.5K | SEC ↗ |
| Jan 7, 2026 | Patrick Miles | CEO | Sale | 100.0K | $21.01 | $2.1M | SEC ↗ |
| Dec 19, 2025 | Scott Lish | CHIEF OPERATING OFFICER | Sale | 19.9K | $19.64 | $390.8K | SEC ↗ |
| Dec 19, 2025 | David R Pelizzon | Director | Sale | 250.0K | $19.66 | $4.9M | SEC ↗ |
| Dec 13, 2025 | Craig E Hunsaker | EVP, PEOPLE & CULTURE | Sale | 32.6K | $20.84 | $679.1K | SEC ↗ |
| Dec 13, 2025 | David Sponsel | EVP, SALES | Sale | 21.1K | $20.79 | $438.8K | SEC ↗ |
| Dec 13, 2025 | David M Demski | Director | Sale | 30.0K | $21.20 | $636.0K | SEC ↗ |
| Dec 11, 2025 | David R Pelizzon | Director, 10% Owner | Sale | 250.0K | $21.18 | $5.3M | SEC ↗ |
| Dec 11, 2025 | Squadron Capital LLC | 10% Owner | Sale | 250.0K | $21.18 | $5.3M | SEC ↗ |
| Dec 11, 2025 | David Sponsel | EVP, SALES | Sale | 988 | $21.45 | $21.2K | SEC ↗ |
| Dec 10, 2025 | Squadron Capital Holdings LLC | 10% Owner | Sale | 250.0K | $21.18 | $5.3M | SEC ↗ |
| Dec 10, 2025 | Jennifer N. Pritzker | 10% Owner | Sale | 250.0K | $21.18 | $5.3M | SEC ↗ |
| Dec 10, 2025 | Scott Lish | CHIEF OPERATING OFFICER | Sale | 10.9K | $21.47 | $233.5K | SEC ↗ |
| Dec 10, 2025 | Tyson Eliot Marshall | GENERAL COUNSEL & CORP. SEC. | Sale | 22.9K | $21.47 | $491.5K | SEC ↗ |
| Dec 4, 2025 | Patrick Miles | CEO | Sale | 100.0K | $22.11 | $2.2M | SEC ↗ |
Showing the 25 most recent of 207 Form 4 filings for Alphatec Holdings, Inc..
Most active ATEC insiders
- Craig E Hunsaker30 filings
- David Sponsel28 filings
- Scott Lish25 filings
- Patrick Miles22 filings
- Jennifer N. Pritzker15 filings
Ask anything about ATEC insider activity
Use Trabud's AI agent to query Alphatec Holdings, Inc.'s Form 4 history in plain English — "Show me ATEC CEO purchases this year" or compare it against any other ticker.
Open the AI agentATEC insider trading FAQ
Are Alphatec Holdings, Inc. insiders buying or selling?
In the last 12 months, Alphatec Holdings, Inc. insiders reported 2 open-market purchases ($2.0M) and 37 sales ($95.8M) — net selling of $93.8M. Since March 2019, Trabud has recorded 207 Form 4 filings for ATEC: 45 buys ($102.4M) and 162 sells ($1.2B). Over the full record that is net selling of $1.1B.
How many insiders trade ATEC stock?
27 distinct insider filers — officers, directors, 10%+ owners, and investment groups filing jointly — have reported Form 4 transactions for Alphatec Holdings, Inc.. The most recent filing was accepted on Sep 11, 2026.
Where does Trabud get ATEC insider trading data?
All ATEC insider trading data comes directly from official SEC EDGAR Form 4 filings, which corporate insiders must submit within two business days of a transaction under Section 16(a) of the Securities Exchange Act of 1934.