Form 144: Amphastar (AMPH) insider to sell 500 RSU shares on 10/01/2025

Rhea-AI Filing Summary

Insider sale notice for AMPH: This Form 144 shows a proposed sale of 500 shares of Amphastar Pharmaceuticals common stock through UBS Financial Services on or about 10/01/2025, with an aggregate market value listed as $13,370.00. The shares were originally acquired as RSUs on 06/07/2022. The filer previously sold three blocks of 500 shares each during July, August and September 2025, generating gross proceeds of $11,733.95, $10,415.75, and $15,491.65 respectively. The filing lists total shares outstanding as 46,495,077, indicating the planned sale is a small fraction of the company’s outstanding shares. The notice includes the signer’s representation that no undisclosed material adverse information about the issuer is known.

Insights

Securities Analyst

TL;DR: Routine insider sale of RSU-derived shares; transaction size is immaterial relative to outstanding shares.

The filer intends to sell 500 shares (~$13.4k) via UBS on 10/01/2025 and has sold three prior 500-share blocks in the past three months. Shares originated from RSUs awarded 06/07/2022. Given the company’s reported outstanding shares of 46,495,077, these transactions represent de minimis dilution or supply impact. The filing complies with Rule 144 disclosure requirements and includes the standard attestation regarding material nonpublic information.

Corporate Governance Expert

TL;DR: Disclosure appears proper; multiple small disposals suggest personal liquidity rather than signaling company issues.

The Form 144 documents repeated small sales over consecutive months and a planned sale, all sourced from RSUs. From a governance perspective, repeated small insider sales are common for tax or diversification purposes. The seller affirms no undisclosed material adverse information, and the filing names the broker and approximate sale date, satisfying procedural requirements. There is no indication of unusual timing or materiality in this filing.

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	UBS Financial Services, Inc. 11 Madison Avenue 4th Floor New York NY 10010	500	13370.00	46495077	10/01/2025	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	06/07/2022	RSU	Issuer			500	06/07/2022	N/A

* 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
Floyd Peterson c/o 11570 SIXTH STREET Rancho Cucamonga CA 91730	Common	08/01/2025	500	10415.75
Floyd Peterson c/o 11570 SIXTH STREET, Rancho Cucamonga CA 91730	Common	09/02/2025	500	15491.65
Floyd Peterson c/o 11570 SIXTH STREET, Rancho Cucamonga CA 91730	Common	07/02/2025	500	11733.95

144: Remarks and Signature

Remarks

Date of Notice

Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1

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)