Tyson Eliot Marshall
CIK: 0001666669
Transaction Breakdown
High conviction signal
Position reduction
Derivative conversions
Compensation grants
Gifts, tax withholding, conversions, dispositions to the issuer and other codes
Companies & Roles (1)
Alphatec Holdings, Inc.
Discretionary Trading P&L
Holdings
Transaction History (22 total)
- Aug 5, 2026ATEC
Alphatec Holdings, Inc.
Sale(S)Direct8.2K shares at avg. $9.65$79K - Apr 7, 2026ATEC
Alphatec Holdings, Inc.
Exercise(M)Direct15K shares at avg. $1.98$30K - Apr 7, 2026ATEC
Alphatec Holdings, Inc.
Exercise(M)Direct15K shares at avg. $1.68$25K - Apr 7, 2026ATEC
Alphatec Holdings, Inc.
Exercise(M)Direct12.5K shares at avg. $3.34$42K - Apr 7, 2026ATEC
Alphatec Holdings, Inc.
Exercise(M)Direct60K shares at avg. $2.69$161K - Apr 7, 2026ATEC
Alphatec Holdings, Inc.
Tax Payment(F)Direct23.4K shares at avg. $11.03$258K - Mar 5, 2026ATEC
Alphatec Holdings, Inc.
Sale(S)Direct88.8K shares at avg. $12.49$1.1M - Feb 25, 2026ATEC
Alphatec Holdings, Inc.
Award(A)Direct205.1K shares- - Feb 25, 2026ATEC
Alphatec Holdings, Inc.
Award(A)Direct84.9K shares- - Feb 25, 2026ATEC
Alphatec Holdings, Inc.
Award(A)Direct12.8K shares- - Dec 5, 2025ATEC
Alphatec Holdings, Inc.
Sale(S)Direct13K shares at avg. $21.47$278K - Dec 5, 2025ATEC
Alphatec Holdings, Inc.
Sale(S)Direct9.9K shares at avg. $21.48$213K - Nov 20, 2025ATEC
Alphatec Holdings, Inc.
Sale(S)Direct70K shares at avg. $19.51$1.4M - Aug 5, 2025ATEC
Alphatec Holdings, Inc.
Sale(S)Direct9.9K shares at avg. $14.86$147K - Aug 5, 2025ATEC
Alphatec Holdings, Inc.
Sale(S)Direct8.2K shares at avg. $14.96$122K - Aug 1, 2025ATEC
Alphatec Holdings, Inc.
Sale(S)Direct12.9K shares at avg. $12.00$155K - Jul 10, 2025ATEC
Alphatec Holdings, Inc.
Sale(S)Direct1.5K shares at avg. $12.00$18K - Apr 1, 2025ATEC
Alphatec Holdings, Inc.
Award(A)Direct19.8K shares- - Mar 6, 2025ATEC
Alphatec Holdings, Inc.
Tax Payment(F)Direct27.8K shares at avg. $11.44$318K - Jan 29, 2025ATEC
Alphatec Holdings, Inc.
Award(A)Direct13K shares- - Jan 29, 2025ATEC
Alphatec Holdings, Inc.
Award(A)Direct114.3K shares- - Jan 29, 2025ATEC
Alphatec Holdings, Inc.
Award(A)Direct105.8K shares-
| Type | Shares | Price | Ownership | |||
|---|---|---|---|---|---|---|
| Aug 5, 2026 | ATEC Alphatec Holdings, Inc. | Sale(S) | 8,168 | $9.65 | $78,821 | Direct |
| Apr 7, 2026 | ATEC Alphatec Holdings, Inc. | Exercise(M) | 15,000 | $1.98 | $29,700 | Direct |
| Apr 7, 2026 | ATEC Alphatec Holdings, Inc. | Exercise(M) | 15,000 | $1.68 | $25,200 | Direct |
| Apr 7, 2026 | ATEC Alphatec Holdings, Inc. | Exercise(M) | 12,500 | $3.34 | $41,750 | Direct |
| Apr 7, 2026 | ATEC Alphatec Holdings, Inc. | Exercise(M) | 60,000 | $2.69 | $161,400 | Direct |
| Apr 7, 2026 | ATEC Alphatec Holdings, Inc. | Tax Payment(F) | 23,393 | $11.03 | $258,025 | Direct |
| Mar 5, 2026 | ATEC Alphatec Holdings, Inc. | Sale(S) | 88,835 | $12.49 | $1,109,549 | Direct |
| Feb 25, 2026 | ATEC Alphatec Holdings, Inc. | Award(A) | 205,094 | - | $0 | Direct |
| Feb 25, 2026 | ATEC Alphatec Holdings, Inc. | Award(A) | 84,918 | - | $0 | Direct |
| Feb 25, 2026 | ATEC Alphatec Holdings, Inc. | Award(A) | 12,840 | - | $0 | Direct |
| Dec 5, 2025 | ATEC Alphatec Holdings, Inc. | Sale(S) | 12,965 | $21.47 | $278,359 | Direct |
| Dec 5, 2025 | ATEC Alphatec Holdings, Inc. | Sale(S) | 9,924 | $21.48 | $213,168 | Direct |
| Nov 20, 2025 | ATEC Alphatec Holdings, Inc. | Sale(S) | 70,000 | $19.51 | $1,365,700 | Direct |
| Aug 5, 2025 | ATEC Alphatec Holdings, Inc. | Sale(S) | 9,924 | $14.86 | $147,471 | Direct |
| Aug 5, 2025 | ATEC Alphatec Holdings, Inc. | Sale(S) | 8,168 | $14.96 | $122,193 | Direct |
| Aug 1, 2025 | ATEC Alphatec Holdings, Inc. | Sale(S) | 12,878 | $12.00 | $154,536 | Direct |
| Jul 10, 2025 | ATEC Alphatec Holdings, Inc. | Sale(S) | 1,500 | $12.00 | $18,000 | Direct |
| Apr 1, 2025 | ATEC Alphatec Holdings, Inc. | Award(A) | 19,848 | - | - | Direct |
| Mar 6, 2025 | ATEC Alphatec Holdings, Inc. | Tax Payment(F) | 27,805 | $11.44 | $318,089 | Direct |
| Jan 29, 2025 | ATEC Alphatec Holdings, Inc. | Award(A) | 12,965 | - | $0 | Direct |
| Jan 29, 2025 | ATEC Alphatec Holdings, Inc. | Award(A) | 114,322 | - | $0 | Direct |
| Jan 29, 2025 | ATEC Alphatec Holdings, Inc. | Award(A) | 105,833 | - | $0 | Direct |
1-22 of 22 transactions
About Marshall Tyson Eliot
Marshall Tyson Eliot (SEC CIK 0001666669) files insider reports with the SEC as GENERAL COUNSEL & CORP. SEC. of Alphatec Holdings, Inc. (ATEC).
Signal8 holds 11 ownership filings by Marshall Tyson Eliot, all Form 4s, filed between Jan 31, 2025 and Aug 7, 2026. Those filings report 22 transactions, from Jan 29, 2025 to Aug 5, 2026. Signal8's Form 4 history starts in Sep 2024.
The business address on Marshall Tyson Eliot's filings is in CARLSBAD, CA.
Recent filings by Marshall Tyson Eliot
- Aug 5, 2026: Open-market sale of ATEC shares (Form 4, code S).
- Apr 7, 2026: Option exercises of ATEC shares (4 lines, Form 4, code M).
- Apr 7, 2026: Tax withholding of ATEC shares (Form 4, code F).
- Mar 5, 2026: Open-market sale of ATEC shares (Form 4, code S).
- Feb 25, 2026: Grants or awards of ATEC shares (3 lines, Form 4, code A).
Other insiders filing for Alphatec Holdings, Inc. (ATEC)
- Demski David M, Director
- Carls Thomas Andrew, EVP, Data & Imaging Solutions
- Miles Patrick, CEO
- MCGINNIS KAREN K, Director
- Blackford Quentin S., Director
- Valentine Keith, Director