Alphatec (ATEC) Form 4: 250,000-share sale, holdings updated

Rhea-AI Filing Summary

Alphatec Holdings (ATEC) insider reported a sale of 250,000 shares of common stock on 11/12/2025 at a weighted average price of $20.80, with trades executed between $20.67 and $21.07.

Following the transaction, the reporting person beneficially owned 11,145,045 shares indirectly through Squadron Capital LLC and 346,827 shares directly. The filer is listed as a Director and 10% Owner, and notes a standard disclaimer regarding indirect beneficial ownership through Squadron.

Insights

Equity Ownership Analyst

10% holder sold 250k shares at ~$20.8; large stake remains; limited directional signal.

Alphatec Holdings (ATEC) reported a Form 4 showing a sale of 250,000 common shares on 11/12/2025, executed at a weighted average price of $20.80 within a range of $20.67 to $21.07. The reporting person is a Director and a 10% owner, with shares held indirectly through Squadron Capital LLC, and also reports separate direct holdings.

After the sale, reported beneficial ownership includes 11,145,045 shares held indirectly via Squadron and 346,827 shares held directly. The filer disclosed standard weighted‑average pricing and offered to provide trade‑level detail upon request, which is typical for aggregated executions. The filing states the filer may be deemed a beneficial owner of Squadron’s holdings and disclaims beneficial ownership beyond pecuniary interest.

What it means: a 250k share disposition against an indirectly held balance of 11.1M shares suggests a small reduction relative to reported indirect holdings. Items to watch: any subsequent Form 4 activity, changes in the indirect balance via Squadron, and whether additional transactions occur around or after 11/12/2025. The disclosed price range provides a near‑term reference point for future comparative disclosures.

Insider Trade Summary

Net Seller: 250,000 shares ($5,200,000)

Net Sell 2 txns

Insider Pelizzon David R

Role Director, 10% Owner

Sold 250,000 shs ($5.20M)

Type	Security	Shares	Price	Value
Sale	Common Stock	250,000	$20.80	$5.20M
holding	Common Stock	--	--	--

Holdings After Transaction: Common Stock — 11,145,045 shares (Indirect, By Squadron Capital LLC); Common Stock — 346,827 shares (Direct)

Footnotes (1)

1. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $20.67 to $21.07, 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.

Form 4 Insider Transactions: What Each Field Means →

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Pelizzon David R

(Last) (First) (Middle)

C/O ALPHATEC SPINE, INC.

1950 CAMINO VIDA ROBLE

(Street)

CARLSBAD CA 92008

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
Alphatec Holdings, Inc. [ ATEC ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director	X	10% Owner
	Officer (give title below)		Other (specify below)

3. Date of Earliest Transaction (Month/Day/Year)
11/12/2025

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	11/12/2025		S		250,000	D	$20.8(1)	11,145,045	I	By Squadron Capital LLC(2)
Common Stock								346,827	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $20.67 to $21.07, 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.

2. 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.

	/s/ David R. Pelizzon	11/14/2025
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What did ATEC’s insider report on the Form 4?

A sale of 250,000 shares of Alphatec common stock on 11/12/2025 at a $20.80 weighted average price.

What was the trading price range for the reported ATEC sale?

Trades occurred between $20.67 and $21.07, per the filing footnote.

How many ATEC shares does the reporting person own after the sale?

Beneficial ownership reported as 11,145,045 shares indirect via Squadron Capital LLC and 346,827 shares directly.

What is the reporting person’s relationship to Alphatec (ATEC)?

Listed as a Director and 10% Owner.

How is indirect ownership through Squadron Capital described?

Shares are held by Squadron Capital LLC; the reporting person disclaims beneficial ownership except to the extent of pecuniary interest.

Was a Rule 10b5-1 plan indicated for this transaction?

The form includes a checkbox reference, but no selection is shown in the provided excerpt.