John Todd Koning 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 John reports to the SEC
Open-market buys and sales
9 trades reported on SEC Form 4, newest first
| Date | Stock | Type | Shares | Price | Value | Holding | Reported |
|---|---|---|---|---|---|---|---|
| Mar 13, 2026 | ATEC | ↓ Sell | 79,789 | $12.36 | $986K | Direct | Mar 17, 2026 (4d) |
| Apr 22, 2025 | ATEC | ↓ Sell | 37,500 | $10.71 | $402K | Direct | Apr 23, 2025 (1d) |
| Mar 10, 2025 | ATEC | ↓ Sell | 165,121 | $9.72 | $1.6M | Direct | Mar 12, 2025 (2d) |
| Apr 24, 2024 | ATEC | ↓ Sell | 37,500 | $12.82 | $481K | Direct | Apr 26, 2024 (2d) |
| Mar 1, 2024 | ATEC | ↓ Sell | 121,601 | $13.30 | $1.6M | Direct | Mar 4, 2024 (3d) |
| Apr 20, 2023 | ATEC | ↓ Sell | 16,500 | $16.42 | $271K | Direct | Apr 24, 2023 (4d) |
| Feb 27, 2023 | ATEC | ↓ Sell | 22,500 | $14.76 | $332K | Direct | Mar 1, 2023 (2d) |
| Feb 22, 2023 | ATEC | ↓ Sell | 13,068 | $14.20 | $186K | Direct | Feb 23, 2023 (1d) |
| Dec 16, 2021 | ATEC | ↑ Buy | 5,000 | $11.17 | $56K | Direct | Dec 20, 2021 (4d) |
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 John Todd Koning's insider trades
John Todd Koning is Chief Financial Officer at Alphatec Holdings (ATEC). Since Dec 16, 2021, John has reported 1 open-market purchase worth $56K and 8 sales worth $5.9M on SEC Form 4. In the last 12 months: 1 sale ($986K).
Their filings also include grants and awards (9 filings), shares withheld for taxes (6 filings). 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.