John Todd Koning

Companies

• Alphatec Holdings, Inc.Chief financial officer Apr 21, 2021 to now¹
• MASIMO CORPSVP, Chief Accounting Officer Nov 5, 2020 to Mar 2, 2021²

Holdings

Stock this person has reported owning, from the forms officers and directors file with the SEC. See the biggest insider stakes.

Shares held

• AAlphatec Holdings, Inc. ATEC600,721 shares³$6.3M at $10.46Mar 13, 2026

As of each latest filing. The line shows shares held over time.

Recent filings

• Mar 13, 2026Sold 79,789 shares at $12.36 of Alphatec Holdings, Inc.³
• Mar 5, 2026Shares withheld for tax 68,910 shares at $12.57 of Alphatec Holdings, Inc.⁴
• Feb 25, 2026Granted 20,380 shares of Alphatec Holdings, Inc.⁵
• Feb 25, 2026Granted 110,394 shares of Alphatec Holdings, Inc.⁵
• Feb 25, 2026Granted 205,094 shares of Alphatec Holdings, Inc.⁵
• Dec 8, 2025Shares withheld for tax 15,266 shares at $21.45 of Alphatec Holdings, Inc.⁶
• Aug 6, 2025Shares withheld for tax 5,315 shares at $15.34 of Alphatec Holdings, Inc.⁷
• Apr 22, 2025Sold 37,500 shares at $10.71 of Alphatec Holdings, Inc.⁸
• Apr 1, 2025Granted 20,929 shares of Alphatec Holdings, Inc.⁹
• Mar 10, 2025Sold 165,121 shares at $9.72 of Alphatec Holdings, Inc.¹⁰
• Jan 29, 2025Granted 19,598 shares of Alphatec Holdings, Inc.¹¹
• Jan 29, 2025Granted 114,322 shares of Alphatec Holdings, Inc.¹¹
• Jan 29, 2025Granted 120,952 shares of Alphatec Holdings, Inc.¹¹
• Apr 24, 2024Sold 37,500 shares at $12.82 of Alphatec Holdings, Inc.¹²
• Mar 1, 2024Sold 121,601 shares at $13.30 of Alphatec Holdings, Inc.¹³
• Feb 21, 2024Granted 31,746 shares of Alphatec Holdings, Inc.¹⁴
• Feb 1, 2024Shares withheld for tax 24,453 shares at $16.68 of Alphatec Holdings, Inc.¹⁵
• Feb 1, 2024Granted 129,612 shares of Alphatec Holdings, Inc.¹⁵
• Apr 20, 2023Sold 16,500 shares at $16.42 of Alphatec Holdings, Inc.¹⁶
• Feb 27, 2023Sold 22,500 shares at $14.76 of Alphatec Holdings, Inc.¹⁷
• Feb 22, 2023Sold 13,068 shares at $14.20 of Alphatec Holdings, Inc.¹⁸
• Feb 1, 2023Granted 32,403 shares of Alphatec Holdings, Inc.¹⁹
• Feb 1, 2023Granted 64,806 shares of Alphatec Holdings, Inc.¹⁹
• Feb 1, 2023Granted 90,242 shares of Alphatec Holdings, Inc.¹⁹
• Apr 28, 2022Shares withheld for tax 16,092 shares at $11.54 of Alphatec Holdings, Inc.²⁰