Updated Jul 16, 2026 · Last SEC filing 2026-06-12
Alphatec Holdings, Inc. (ATEC) has filed 7 SEC Form 4 insider transactions in the last 90 days, with the most recent on 2026-06-12. 2 Form 8-K material event filings were reported by ATEC in the last 90 days. 1 Form 144 notices of proposed sale were filed for ATEC stock. InsiderAlpha tracks every ATEC SEC filing — Form 4, Form 144, and 8-K — in real time, including Rule 10b5-1 plan detection.
| SIC classification | Surgical & Medical Instruments & Apparatus (SIC 3841) |
|---|---|
| SEC CIK | 0001350653 |
| Form 4 filings (90d) | 7 |
|---|---|
| Form 8-K filings (90d) | 2 |
| Form 144 notices (90d) | 1 |
| Latest Form 4 filing | 2026-06-12 |
| Date | Insider | Role | Transaction | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| MCGINNIS KAREN K | Insider | S — Open-market sale | 6.0K | $8.01 | $48K | SEC | |
| Berkowitz Mortimer III | Insider | A — Grant or award | 32.0K | $0.00 | — | SEC | |
| Blackford Quentin S. | Insider | A — Grant or award | 32.0K | $0.00 | — | SEC | |
| Valentine Keith | Insider | A — Grant or award | 32.0K | $0.00 | — | SEC | |
| Pelizzon David R | Insider | A — Grant or award | 32.0K | $0.00 | — | SEC | |
| MCGINNIS KAREN K | Insider | A — Grant or award | 32.0K | $0.00 | — | SEC | |
| Demski David M | Insider | A — Grant or award | 32.0K | $0.00 | — | SEC | |
| Valentine Keith | Insider | P — Open-market purchase | 35.0K | $7.00 | $245K | SEC | |
| Valentine Keith | Insider | P — Open-market purchase | 43.8K | $7.54 | $331K | SEC | |
| Valentine Keith | Insider | P — Open-market purchase | 56.2K | $7.49 | $421K | SEC | |
| Marshall Tyson Eliot | GENERAL COUNSEL & CORP. SEC. | M — Option exercise | 60.0K | $2.69 | $161K | SEC | |
| Marshall Tyson Eliot | GENERAL COUNSEL & CORP. SEC. | F — Tax withholding / forfeiture | 23.4K | $11.03 | $258K | SEC | |
| Marshall Tyson Eliot | GENERAL COUNSEL & CORP. SEC. | M — Option exercise | 15.0K | $1.68 | $25K | SEC | |
| Marshall Tyson Eliot | GENERAL COUNSEL & CORP. SEC. | M — Option exercise | 12.5K | $3.34 | $42K | SEC | |
| Marshall Tyson Eliot | GENERAL COUNSEL & CORP. SEC. | M — Option exercise | 15.0K | $1.98 | $30K | SEC |
All transactions sourced from SEC EDGAR Form 4 filings for Alphatec Holdings, Inc. (ATEC). Updated in real time as new filings are submitted to the SEC.
| Insider | Form 4 filings | Total transaction value |
|---|---|---|
| Valentine Keith | 4 | $996K |
| MCGINNIS KAREN K | 2 | $48K |
| Berkowitz Mortimer III | 1 | — |
| Blackford Quentin S. | 1 | — |
| Demski David M | 1 | — |
Form 144 must be filed before insiders sell restricted or control stock above SEC thresholds. A cluster of Form 144 notices often precedes a wave of insider distribution.
SEC Form 4 transactions are reported with a one-letter code indicating the type of transaction. Common codes you'll see in ATEC insider filings:
| P | Open-market purchase by the insider |
|---|---|
| S | Open-market sale by the insider |
| A | Grant, award, or other acquisition from the issuer |
| M | Exercise or conversion of derivative security (e.g. options) |
| F | Payment of exercise price or tax liability via share withholding |
| G | Bona-fide gift of securities |
| D | Disposition to the issuer (e.g. share buyback participation) |
| J | Other acquisition or disposition |
| X | Exercise of in-the-money or at-the-money derivative security |
| C | Conversion of derivative security |
| V | Transaction voluntarily reported earlier than required |
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