David Sponsel, EVP of Sales at Alphatec Holdings ($ATEC), sold about $6.6 million in company shares across seven open market transactions over the past year. His most recent sale occurred on March 11, 2026. These sales rank him 1,575th among 11,678 insiders by total value sold, below the average of $8.6 million per seller and 6.4 transactions. Sponsel made no open market purchases in this period.
| Transaction Date | Company | Ticker | Insider Name | Title | Transaction Type | Security | Shares | Price | Shares Owned Following | Total Shares Outstanding | % of Owned | % of Outstanding |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| March 11, 2026 | Alphatec Holdings, Inc. | $ATEC | Sponsel David | EVP, SALES | S | Common Stock | 163452 | $12.52 | 504,932.0000 | 151,401,000 | 24.45% | 0.11% |
| Feb. 25, 2026 | Alphatec Holdings, Inc. | $ATEC | Sponsel David | EVP, SALES | A | Common Stock | 205094 | $0.00 | 554,594.0000 | 151,401,000 | 58.68% | 0.14% |
| Feb. 25, 2026 | Alphatec Holdings, Inc. | $ATEC | Sponsel David | EVP, SALES | A | Restricted Stock Units | 46705 | $0.00 | 46,705.0000 | 151,401,000 | 9999.99% | 0.03% |
| Feb. 25, 2026 | Alphatec Holdings, Inc. | $ATEC | Sponsel David | EVP, SALES | A | Restricted Stock Units | 46705 | $0.00 | 46,705.0000 | 151,401,000 | 9999.99% | 0.03% |
| Feb. 25, 2026 | Alphatec Holdings, Inc. | $ATEC | Sponsel David | EVP, SALES | A | Common Stock | 20380 | $0.00 | 668,384.0000 | 151,401,000 | 3.15% | 0.01% |
| Feb. 25, 2026 | Alphatec Holdings, Inc. | $ATEC | Sponsel David | EVP, SALES | A | Common Stock | 93410 | $0.00 | 648,004.0000 | 151,401,000 | 16.84% | 0.06% |
| Feb. 5, 2026 | Alphatec Holdings, Inc. | $ATEC | Sponsel David | EVP, SALES | S | Common Stock | 60425 | $13.79 | 349,500.0000 | 151,401,000 | 14.74% | 0.04% |
| Dec. 10, 2025 | Alphatec Holdings, Inc. | $ATEC | Sponsel David | EVP, SALES | S | Common Stock | 21106 | $20.79 | 439,767.0000 | 151,401,000 | 4.58% | 0.01% |
| Dec. 8, 2025 | Alphatec Holdings, Inc. | $ATEC | Sponsel David | EVP, SALES | S | Common Stock | 988 | $21.45 | 460,873.0000 | 151,401,000 | 0.21% | 0.00% |
| Oct. 24, 2025 | Alphatec Holdings, Inc. | $ATEC | Sponsel David | EVP, SALES | S | Common Stock | 70000 | $16.18 | 461,861.0000 | 151,401,000 | 13.16% | 0.05% |
| Sept. 19, 2025 | Alphatec Holdings, Inc. | $ATEC | Sponsel David | EVP, SALES | S | Common Stock | 2555 | $15.34 | 531,861.0000 | 142,946,000 | 0.48% | 0.00% |
| Sept. 18, 2025 | Alphatec Holdings, Inc. | $ATEC | Sponsel David | EVP, SALES | S | Common Stock | 137445 | $15.09 | 534,416.0000 | 142,946,000 | 20.46% | 0.10% |
| Aug. 6, 2025 | Alphatec Holdings, Inc. | $ATEC | Sponsel David | EVP, SALES | F | Common Stock | 982 | $15.34 | 671,861.0000 | 142,946,000 | 0.15% | 0.00% |
| April 1, 2025 | Alphatec Holdings, Inc. | $ATEC | Sponsel David | EVP, SALES | A | Common Stock | 3866 | $0.00 | 672,843.0000 | 142,946,000 | 0.58% | 0.00% |
| March 6, 2025 | Alphatec Holdings, Inc. | $ATEC | Sponsel David | EVP, SALES | S | Common Stock | 33732 | $10.83 | 668,977.0000 | 142,946,000 | 4.80% | 0.02% |
| Feb. 24, 2025 | Alphatec Holdings, Inc. | $ATEC | Sponsel David | EVP, SALES | S | Common Stock | 12946 | $10.73 | 722,128.0000 | 142,946,000 | 1.76% | 0.01% |
| Feb. 25, 2025 | Alphatec Holdings, Inc. | $ATEC | Sponsel David | EVP, SALES | S | Common Stock | 19419 | $10.41 | 702,709.0000 | 142,946,000 | 2.69% | 0.01% |
| Feb. 3, 2025 | Alphatec Holdings, Inc. | $ATEC | Sponsel David | EVP, SALES | S | Common Stock | 36256 | $11.42 | 735,074.0000 | 142,946,000 | 4.70% | 0.03% |
| Jan. 29, 2025 | Alphatec Holdings, Inc. | $ATEC | Sponsel David | EVP, SALES | A | Common Stock | 21106 | $0.00 | 771,330.0000 | 142,946,000 | 2.81% | 0.01% |
| Jan. 29, 2025 | Alphatec Holdings, Inc. | $ATEC | Sponsel David | EVP, SALES | A | Common Stock | 133591 | $0.00 | 635,902.0000 | 142,946,000 | 26.60% | 0.09% |
| Jan. 29, 2025 | Alphatec Holdings, Inc. | $ATEC | Sponsel David | EVP, SALES | A | Common Stock | 114322 | $0.00 | 750,224.0000 | 142,946,000 | 17.98% | 0.08% |
| Jan. 13, 2025 | Alphatec Holdings, Inc. | $ATEC | Sponsel David | EVP, SALES | S | Common Stock | 58283 | $10.71 | 502,311.0000 | 142,946,000 | 10.40% | 0.04% |
| Jan. 10, 2025 | Alphatec Holdings, Inc. | $ATEC | Sponsel David | EVP, SALES | S | Common Stock | 238 | $10.00 | 560,594.0000 | 142,946,000 | 0.04% | 0.00% |
| Dec. 11, 2024 | Alphatec Holdings, Inc. | $ATEC | Sponsel David | EVP, SALES | S | Common Stock | 62018 | $9.69 | 560,832.0000 | 143,492,000 | 9.96% | 0.04% |
| Feb. 27, 2024 | Alphatec Holdings, Inc. | $ATEC | Sponsel David | EVP, SALES | S | Common Stock | 32365 | $15.19 | 622,296.0000 | 121,242,000 | 4.94% | 0.03% |
| Feb. 21, 2024 | Alphatec Holdings, Inc. | $ATEC | Sponsel David | EVP, SALES | S | Common Stock | 17820 | $15.34 | 654,661.0000 | 121,242,000 | 2.65% | 0.01% |
| Feb. 21, 2024 | Alphatec Holdings, Inc. | $ATEC | Sponsel David | EVP, SALES | A | Common Stock | 35063 | $0.00 | 672,481.0000 | 121,242,000 | 5.50% | 0.03% |
| Feb. 14, 2024 | Alphatec Holdings, Inc. | $ATEC | Sponsel David | EVP, SALES | S | Common Stock | 2500 | $16.16 | 637,418.0000 | 121,242,000 | 0.39% | 0.00% |
| Feb. 1, 2024 | Alphatec Holdings, Inc. | $ATEC | Sponsel David | EVP, SALES | A | Common Stock | 121258 | $0.00 | 676,538.0000 | 121,242,000 | 21.84% | 0.10% |
| Feb. 2, 2024 | Alphatec Holdings, Inc. | $ATEC | Sponsel David | EVP, SALES | S | Common Stock | 36620 | $16.47 | 639,918.0000 | 121,242,000 | 5.41% | 0.03% |
| Jan. 16, 2024 | Alphatec Holdings, Inc. | $ATEC | Sponsel David | EVP, SALES | S | Common Stock | 2500 | $15.00 | 555,280.0000 | 121,242,000 | 0.45% | 0.00% |
| Dec. 21, 2023 | Alphatec Holdings, Inc. | $ATEC | Sponsel David | EVP, SALES | S | Common Stock | 2500 | $15.00 | 557,780.0000 | 103,373,000 | 0.45% | 0.00% |
| June 15, 2023 | Alphatec Holdings, Inc. | $ATEC | Sponsel David | EVP, SALES | S | Common Stock | 55577 | $16.17 | 559,840.0000 | 103,373,000 | 9.03% | 0.05% |
| May 15, 2023 | Alphatec Holdings, Inc. | $ATEC | Sponsel David | EVP, SALES | F | Common Stock | 68174 | $15.59 | 615,417.0000 | 103,373,000 | 9.97% | 0.07% |
| April 26, 2023 | Alphatec Holdings, Inc. | $ATEC | Sponsel David | EVP, SALES | F | Common Stock | 35590 | $16.15 | 683,591.0000 | 103,373,000 | 4.95% | 0.03% |
| March 6, 2023 | Alphatec Holdings, Inc. | $ATEC | Sponsel David | EVP, SALES | S | Common Stock | 16823 | $15.82 | 719,181.0000 | 103,373,000 | 2.29% | 0.02% |
| Feb. 1, 2023 | Alphatec Holdings, Inc. | $ATEC | Sponsel David | EVP, SALES | A | Common Stock | 30314 | $0.00 | 736,004.0000 | 103,373,000 | 4.30% | 0.03% |
| Feb. 1, 2023 | Alphatec Holdings, Inc. | $ATEC | Sponsel David | EVP, SALES | A | Common Stock | 60629 | $0.00 | 705,690.0000 | 103,373,000 | 9.40% | 0.06% |
| Feb. 1, 2023 | Alphatec Holdings, Inc. | $ATEC | Sponsel David | EVP, SALES | A | Common Stock | 98078 | $0.00 | 645,061.0000 | 103,373,000 | 17.93% | 0.09% |
| Jan. 9, 2023 | Alphatec Holdings, Inc. | $ATEC | Sponsel David | EVP, SALES | S | Common Stock | 10000 | $11.99 | 546,983.0000 | 103,373,000 | 1.80% | 0.01% |