Scott Lish notifies sale of 19,900 ATEC shares (NASDAQ: ATEC)

Rhea-AI Filing Summary

ATEC submitted a Form 144 notice reporting a proposed sale of 19,900 shares by Scott Lish. The filing shows the sale date 12/16/2025 and aggregate proceeds of $389,964.35. The excerpt also lists multiple issuer-issued performance stock units and restricted stock vesting entries with dates and share counts.

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK
Filer CCC
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer

SEC File Number

Address of Issuer

Phone

Name of Person for Whose Account the Securities are To Be Sold

See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.

Relationship to Issuer

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common	Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza 8th Floor New York NY 10004	260535	3211145.98	151356620	03/13/2026	NASDAQ

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common	03/05/2026	Performance Stock Units	Issuer			146094	03/05/2026	Services Rendered
Common	02/24/2025	Restricted stock vesting under a registered plan	Issuer			5296	02/24/2025	Services Rendered
Common	02/01/2025	Performance Stock Units	Issuer			15025	02/01/2025	Services Rendered
Common	02/24/2025	Performance Stock Units	Issuer			11380	02/24/2025	Services Rendered
Common	02/24/2023	Restricted stock vesting under a registered plan	Issuer			4100	02/24/2023	Services Rendered
Common	02/01/2026	Performance Stock Units	Issuer			33388	02/01/2026	Services Rendered
Common	03/05/2025	Performance Stock Units	Issuer			18143	03/05/2025	Services Rendered
Common	03/05/2026	Restricted stock vesting under a registered plan	Issuer			10582	03/05/2026	Services Rendered
Common	02/01/2026	Restricted stock vesting under a registered plan	Issuer			16527	02/01/2026	Services Rendered

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
Scott Lish 1950 Camino Vida Roble CARLSBAD CA 92008	ATEC	12/16/2025	19900	389964.35

144: Remarks and Signature

Remarks

Date of Notice

ATTENTION:

The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.

Signature

ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)

FAQ

What does the ATEC Form 144 filing show?

The filing shows a proposed sale of 19,900 shares by Scott Lish with a trade date of 12/16/2025. It reports aggregate proceeds of $389,964.35 and lists multiple issuer-issued equity items with vesting dates and amounts.

Who is the selling party in the ATEC notice?

The selling party is listed as Scott Lish with an address in Carlsbad, CA. The Form 144 identifies him as the person offering the securities for sale under the Rule 144 notice dated 12/16/2025.

How many shares and what proceeds are reported in the ATEC Form 144?

The Form 144 reports 19,900 shares being offered and an aggregate sale amount of $389,964.35. Those figures appear on the filing line associated with the seller and the stated trade date of 12/16/2025.

Does the filing list other equity awards for ATEC?

Yes. The excerpt lists multiple issuer entries for Performance Stock Units and restricted stock vesting under a registered plan, with specific vesting dates and share counts (for example, 14,609 on 03/05/2026, 33,388 on 02/01/2026).

Does Form 144 confirm the sale has settled?

No. Form 144 is a notice of a proposed sale under Rule 144; it reports the intended sale date (12/16/2025) and proceeds but does not itself confirm settlement or execution of the transaction.