John Todd Koning

CIK: 0001830843

Transaction Breakdown

Open Market Buys (P)0 (0.0%)

High conviction signal

Open Market Sales (S)3 (23.1%)

Position reduction

Option Exercises (M)0 (0.0%)

Derivative conversions

Awards (A)7 (53.8%)

Compensation grants

Other (G, F, J, C, D, …)3 (23.1%)

Gifts, tax withholding, conversions, dispositions to the issuer and other codes

Companies & Roles (1)

ATEC

Alphatec Holdings, Inc.

Officer

Discretionary Trading P&L

Holdings

Transaction History (13 total)

ATEC
Alphatec Holdings, Inc.
Mar 13, 2026
Sale(S)
Direct
79.8K shares at avg. $12.36$986K
ATEC
Alphatec Holdings, Inc.
Mar 5, 2026
Tax Payment(F)
Direct
68.9K shares at avg. $12.57$866K
ATEC
Alphatec Holdings, Inc.
Feb 25, 2026
Award(A)
Direct
205.1K shares-
ATEC
Alphatec Holdings, Inc.
Feb 25, 2026
Award(A)
Direct
20.4K shares-
ATEC
Alphatec Holdings, Inc.
Feb 25, 2026
Award(A)
Direct
110.4K shares-
ATEC
Alphatec Holdings, Inc.
Dec 8, 2025
Tax Payment(F)
Direct
15.3K shares at avg. $21.45$327K
ATEC
Alphatec Holdings, Inc.
Aug 6, 2025
Tax Payment(F)
Direct
5.3K shares at avg. $15.34$82K
ATEC
Alphatec Holdings, Inc.
Apr 22, 2025
Sale(S)
Direct
37.5K shares at avg. $10.71$402K
ATEC
Alphatec Holdings, Inc.
Apr 1, 2025
Award(A)
Direct
20.9K shares-
ATEC
Alphatec Holdings, Inc.
Mar 10, 2025
Sale(S)
Direct
165.1K shares at avg. $9.72$1.6M
ATEC
Alphatec Holdings, Inc.
Jan 29, 2025
Award(A)
Direct
114.3K shares-
ATEC
Alphatec Holdings, Inc.
Jan 29, 2025
Award(A)
Direct
121K shares-
ATEC
Alphatec Holdings, Inc.
Jan 29, 2025
Award(A)
Direct
19.6K shares-

		Type	Shares	Price		Ownership
Mar 13, 2026	ATEC Alphatec Holdings, Inc.	Sale(S)	79,789	$12.36	$986,192	Direct
Mar 5, 2026	ATEC Alphatec Holdings, Inc.	Tax Payment(F)	68,910	$12.57	$866,199	Direct
Feb 25, 2026	ATEC Alphatec Holdings, Inc.	Award(A)	205,094	-	$0	Direct
Feb 25, 2026	ATEC Alphatec Holdings, Inc.	Award(A)	20,380	-	$0	Direct
Feb 25, 2026	ATEC Alphatec Holdings, Inc.	Award(A)	110,394	-	$0	Direct
Dec 8, 2025	ATEC Alphatec Holdings, Inc.	Tax Payment(F)	15,266	$21.45	$327,456	Direct
Aug 6, 2025	ATEC Alphatec Holdings, Inc.	Tax Payment(F)	5,315	$15.34	$81,532	Direct
Apr 22, 2025	ATEC Alphatec Holdings, Inc.	Sale(S)	37,500	$10.71	$401,625	Direct
Apr 1, 2025	ATEC Alphatec Holdings, Inc.	Award(A)	20,929	-	-	Direct
Mar 10, 2025	ATEC Alphatec Holdings, Inc.	Sale(S)	165,121	$9.72	$1,604,976	Direct
Jan 29, 2025	ATEC Alphatec Holdings, Inc.	Award(A)	114,322	-	$0	Direct
Jan 29, 2025	ATEC Alphatec Holdings, Inc.	Award(A)	120,952	-	$0	Direct
Jan 29, 2025	ATEC Alphatec Holdings, Inc.	Award(A)	19,598	-	$0	Direct

1-13 of 13 transactions

About Koning John Todd

Koning John Todd (SEC CIK 0001830843) files insider reports with the SEC as CHIEF FINANCIAL OFFICER of Alphatec Holdings, Inc. (ATEC).

Signal8 holds 9 ownership filings by Koning John Todd, all Form 4s, filed between Jan 31, 2025 and Mar 17, 2026. Those filings report 13 transactions, from Jan 29, 2025 to Mar 13, 2026. Signal8's Form 4 history starts in Sep 2024.

The business address on Koning John Todd's filings is in CARLSBAD, CA.

Recent filings by Koning John Todd

Mar 13, 2026: Open-market sale of ATEC shares (Form 4, code S).
Mar 5, 2026: Tax withholding of ATEC shares (Form 4, code F).
Feb 25, 2026: Grants or awards of ATEC shares (3 lines, Form 4, code A).
Dec 8, 2025: Tax withholding of ATEC shares (Form 4, code F).
Aug 6, 2025: Tax withholding of ATEC shares (Form 4, code F).

Other insiders filing for Alphatec Holdings, Inc. (ATEC)

Demski David M, Director
Carls Thomas Andrew, EVP, Data & Imaging Solutions
Miles Patrick, CEO
Marshall Tyson Eliot, GENERAL COUNSEL & CORP. SEC.
MCGINNIS KAREN K, Director
Blackford Quentin S., Director

How to read Form 4 transaction codes