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  4. [144] Amphastar Pharmaceuticals, Inc. SEC Filing

Amphastar (NASDAQ: AMPH) insider lines up stock sale after option exercise

Filing Impact
(Neutral)
Filing Sentiment
(Neutral)
Form Type
144

Rhea-AI Filing Summary

Amphastar Pharmaceuticals, Inc. (symbol AMPH) has a notice of proposed sale under Rule 144 for its common stock. Floyd Petersen plans to sell 47,101 shares of Amphastar common stock through UBS Financial Services Inc., with an indicated aggregate market value of 989,121. Amphastar reports that 44,092,000 shares of this class of common stock are outstanding. The shares to be sold were acquired from the issuer via an option exercise for cash, with the form listing 08/18/2026 as both the acquisition and proposed sale date, and identifying NASDAQ as the exchange.

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Shares to be sold 47,101 shares Number of Amphastar common shares proposed to be sold under Rule 144
Aggregate market value 989,121 Aggregate market value of the 47,101 shares to be sold
Shares outstanding 44,092,000 shares Total Amphastar common shares outstanding for this class
Proposed sale date 08/18/2026 Approximate date of sale listed for the Rule 144 transaction
Rule 144 regulatory
"See the definition of "person" in paragraph (a) of Rule 144."
Rule 144 is a U.S. securities regulation that sets conditions under which restricted or insider-held shares can be legally resold to the public, such as required holding periods, availability of public information, limits on how much can be sold at once, and certain filing requirements. For investors it matters because it determines when previously locked-up shares can enter the market — like a release valve that can increase supply, affect share price, and signal insider intent.
aggregate market value financial
"Common Stock | UBS Financial Services Inc ... | 47101 | 989121 | 44092000"
Aggregate market value is the combined price you would pay to buy all outstanding shares of a company or all companies in a group at current market prices — essentially the sum of each stock’s market capitalization. It matters to investors because it shows the overall size and weight of an investment or sector (like the total cost to buy every piece of a puzzle), helps compare scale across companies or markets, and influences index composition and risk exposure.
attorney-in-fact regulatory
"for UBS Financial Services Inc, as attorney-in-fact for Floyd Petersen"
An attorney-in-fact is the person or entity given legal authority through a power of attorney to act on behalf of another for specific tasks, such as signing documents, voting shares, or handling transactions. For investors, this matters because it lets a trusted representative make timely decisions or complete paperwork when the owner cannot, much like handing keys to someone to run errands on your behalf—so checks on scope and limits of that authority are important.

FAQ

What does the Form 144 filing for AMPH disclose about planned share sales?
The Form 144 discloses a proposed sale of 47,101 shares of Amphastar Pharmaceuticals, Inc. common stock. The shares are to be sold under Rule 144 through UBS Financial Services Inc. and were acquired via an option exercise for cash.

How many AMPH shares are planned to be sold and what is their aggregate market value?
The filing lists a planned sale of 47,101 shares of Amphastar common stock with an aggregate market value of 989,121. These figures relate specifically to this proposed Rule 144 transaction reported for the selling security holder.

Who is the selling security holder in the AMPH Form 144 notice?
The selling security holder named is Floyd Petersen. UBS Financial Services Inc. is identified as the broker, and the form is signed by Mijo Suric for UBS as attorney-in-fact for Floyd Petersen in connection with this planned Rule 144 sale.

What does the AMPH Form 144 say about total shares outstanding?
The notice states that 44,092,000 shares of Amphastar Pharmaceuticals, Inc. common stock are outstanding. This figure provides context for the size of the 47,101-share proposed sale relative to the total outstanding shares of the same class.

How and when were the AMPH shares in this Form 144 acquired?
The shares covered by this Form 144 were acquired from the issuer through an option exercise for cash. The form lists 08/18/2026 as the relevant date for both the option exercise and the proposed sale, tying acquisition and sale to the same day.

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

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144: Filer Information

144: Issuer Information

144: Securities Information



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


* 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

144: Remarks and Signature

Source: View Original Filing on SEC EDGAR