David Sponsel insider trades: Alphatec Holdings (ATEC) stock buys and sales
Trades on the price chart
Daily close, with an arrow on each day they bought or sold
Companies
Where David reports to the SEC
Open-market buys and sales
27 trades reported on SEC Form 4, newest first
| Date | Stock | Type | Shares | Price | Value | Holding | Reported |
|---|---|---|---|---|---|---|---|
| Feb 5, 2026 | ATEC | ↓ Sell | 60,425 | $13.79 | $833K | Direct | Feb 6, 2026 (1d) |
| Dec 10, 2025 | ATEC | ↓ Sell | 21,106 | $20.79 | $439K | Direct | Dec 12, 2025 (2d) |
| Dec 8, 2025 | ATEC | ↓ Sell | 988 | $21.45 | $21K | Direct | Dec 10, 2025 (2d) |
| Oct 24, 2025 | ATEC | ↓ Sell | 70,000 | $16.18 | $1.1M | Direct | Oct 28, 2025 (4d) |
| Sep 19, 2025 | ATEC | ↓ Sell | 140,000 | $15.09 | $2.1M | Direct | Sep 19, 2025 (0d) |
| Mar 6, 2025 | ATEC | ↓ Sell | 33,732 | $10.83 | $365K | Direct | Mar 10, 2025 (4d) |
| Feb 25, 2025 | ATEC | ↓ Sell | 32,365 | $10.54 | $341K | Direct | Feb 26, 2025 (1d) |
| Feb 3, 2025 | ATEC | ↓ Sell | 36,256 | $11.42 | $414K | Direct | Feb 4, 2025 (1d) |
| Jan 13, 2025 | ATEC | ↓ Sell | 58,521 | $10.71 | $627K | Direct | Jan 14, 2025 (1d) |
| Dec 11, 2024 | ATEC | ↓ Sell | 62,018 | $9.69 | $601K | Direct | Dec 13, 2024 (2d) |
| Feb 27, 2024 | ATEC | ↓ Sell | 32,365 | $15.19 | $492K | Direct | Feb 29, 2024 (2d) |
| Feb 21, 2024 | ATEC | ↓ Sell | 17,820 | $15.34 | $273K | Direct | Feb 22, 2024 (1d) |
| Feb 14, 2024 | ATEC | ↓ Sell | 2,500 | $16.16 | $40K | Direct | Feb 15, 2024 (1d) |
| Feb 2, 2024 | ATEC | ↓ Sell | 36,620 | $16.47 | $603K | Direct | Feb 5, 2024 (3d) |
| Jan 16, 2024 | ATEC | ↓ Sell | 2,500 | $15.00 | $38K | Direct | Jan 17, 2024 (1d) |
| Dec 21, 2023 | ATEC | ↓ Sell10b5-1 | 2,500 | $15.00 | $38K | Direct | Dec 26, 2023 (5d) |
| Jun 15, 2023 | ATEC | ↓ Sell | 55,577 | $16.17 | $899K | Direct | Jun 20, 2023 (5d) |
| Mar 6, 2023 | ATEC | ↓ Sell | 16,823 | $15.82 | $266K | Direct | Mar 8, 2023 (2d) |
| Jan 9, 2023 | ATEC | ↓ Sell10b5-1 | 10,000 | $11.99 | $120K | Direct | Jan 10, 2023 (1d) |
| Dec 5, 2022 | ATEC | ↓ Sell10b5-1 | 10,000 | $9.88 | $99K | Direct | Dec 5, 2022 (0d) |
| Nov 7, 2022 | ATEC | ↓ Sell10b5-1 | 10,000 | $9.25 | $93K | Direct | Nov 9, 2022 (2d) |
| Nov 12, 2021 | ATEC | ↓ Sell | 9,847 | $11.56 | $114K | Direct | Nov 15, 2021 (3d) |
| Jun 16, 2021 | ATEC | ↓ Sell | 10,000 | $14.78 | $148K | Direct | Jun 21, 2021 (5d) |
| May 3, 2021 | ATEC | ↓ Sell | 30,000 | $15.97 | $479K | Direct | May 4, 2021 (1d) |
| Apr 26, 2021 | ATEC | ↓ Sell | 14,572 | $16.63 | $242K | Direct | Apr 28, 2021 (2d) |
| Oct 12, 2020 | ATEC | ↓ Sell | 89,999 | $9.47 | $852K | Direct | Oct 14, 2020 (2d) |
| Mar 11, 2020 | ATEC | ↑ Buy | 11,000 | $4.51 | $50K | Direct | Mar 12, 2020 (1d) |
Each row is one filing's trades in one stock, summed. Shares and prices are as filed, before any later stock split.
Other ATEC insiders
Open-market trades in the last 12 months
About David Sponsel's insider trades
David Sponsel is EVP, Sales at Alphatec Holdings (ATEC). Since Mar 11, 2020, David has reported 1 open-market purchase worth $50K and 26 sales worth $11.7M on SEC Form 4. In the last 12 months: 3 sales ($1.3M).
4 sales (3% of the value sold) were made under a Rule 10b5-1 trading plan, which is set up months in advance and runs on a schedule, so they say little about how the insider sees the stock today.
Their filings also include grants and awards (11 filings), shares withheld for taxes (11 filings), option exercises (1 filing). These aren't open-market trades and aren't counted above.
How to read insider trades
Officers, directors and owners of more than 10% of a company must report trades in its stock on SEC Form 4, usually within two business days. Purchases with their own money are the stronger signal: insiders sell for many reasons (taxes, diversification, a house), but buy for one. See every ATEC insider trade, the latest insider trades across the market, or cluster buys, when several insiders buy the same stock within days.