David R. Pelizzon - Nov 24, 2025 Form 4 Insider Report for Alphatec Holdings, Inc. (ATEC)

Role: Director, 10%+ Owner
Signature: /s/ David R. Pelizzon
Stock symbol: ATEC
Transactions as of: Nov 24, 2025
Transactions value $: -$5,155,000
Form type: 4
Date filed: 11/25/2025, 07:00 PM
Previous filing: Nov 14, 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Pelizzon David R	Director, 10%+ Owner	C/O ALPHATEC SPINE, INC., 1950 CAMINO VIDA ROBLE, CARLSBAD	/s/ David R. Pelizzon	2025-11-25	0001719217

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	ATEC	Common Stock	Sale	-$5.16M	-250K	-2.24%	$20.62	10.9M	Nov 24, 2025	By Squadron Capital LLC	F1, F2
holding	ATEC	Common Stock						347K	Nov 24, 2025	Direct

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $20.34 to $20.79, inclusive. The reporting person undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote.
F2	These shares are held by Squadron Capital LLC ("Squadron"). As one of two members of the Managing Committee of Squadron, the reporting person may be deemed to be the beneficial owner of these shares. The reporting person expressly disclaims beneficial ownership of these shares, except to the extent of his pecuniary interest therein. The inclusion of these shares in this report shall not be deemed to be an admission of beneficial ownership for purposes of Section 16 or for any other purpose.

Content

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $20.34 to $20.79, inclusive. The reporting person undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote.

These shares are held by Squadron Capital LLC ("Squadron"). As one of two members of the Managing Committee of Squadron, the reporting person may be deemed to be the beneficial owner of these shares. The reporting person expressly disclaims beneficial ownership of these shares, except to the extent of his pecuniary interest therein. The inclusion of these shares in this report shall not be deemed to be an admission of beneficial ownership for purposes of Section 16 or for any other purpose.