Alphatec director reports sale of 30,000 shares in Form 4

Alphatec Holdings, Inc. disclosed that one of its directors sold 30,000 shares of common stock on 12/11/2025 at a price of $21.2 per share.

Rhea-AI Filing Summary

Alphatec Holdings, Inc. disclosed that one of its directors sold 30,000 shares of common stock on 12/11/2025 at a price of $21.2 per share.

Following this transaction, the director directly owned 399,623 shares of Alphatec common stock, as reported in the Form 4 filed for a single reporting person.

Insider Trade Summary

Net Seller: 30,000 shares

Net Sell 1 txn

Insider Demski David M

Role Director

Sold 30,000 shs ($636K)

Type	Security	Shares	Price	Value
Sale	Common Stock	30,000	$21.20	$636K

Holdings After Transaction: Common Stock — 399,623 shares (Direct)

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transaction did Alphatec Holdings (ATEC) report in this Form 4?

A director of Alphatec Holdings, Inc. reported selling 30,000 shares of common stock on 12/11/2025 at a price of $21.2 per share.

How many Alphatec (ATEC) shares does the director own after the reported sale?

After the sale, the director directly owned 399,623 shares of Alphatec Holdings common stock.

What was the price per share for the Alphatec director’s stock sale?

The 30,000 shares of Alphatec Holdings common stock were sold at $21.2 per share.

When did the Alphatec (ATEC) insider transaction take place?

The reported transaction occurred on 12/11/2025, as shown in Table I of the Form 4.

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

The reporting person is identified as a Director of Alphatec Holdings, Inc., with the director box checked on the form.

Is this Alphatec Form 4 filed for one or multiple reporting persons?

The box indicating Form filed by One Reporting Person is checked, meaning the filing covers a single insider.

What type of security was involved in the Alphatec director’s transaction?

The transaction involved common stock of Alphatec Holdings, Inc., listed in Table I of the Form 4.

AI-generated analysis. How Rhea-AI works. Not financial advice.

Form 4 Insider Transactions: What Each Field Means →

See more from StockTitan in Google Search and AI answers. Adds StockTitan as a preferred source · opens Google

Add on Google Not now

Accepted by SEC EDGAR 12/12/2025 - 07:14 PM Learn about SEC filing dates

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^*

Demski David M

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

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

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	12/11/2025		S		30,000	D	$21.2	399,623	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:

	/s/ Tyson E. Marshall, Attorney-in-Fact	12/12/2025
	** 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.