AMPX insider sells shares under 10b5-1 plan

AMPX insider transactions: Stefan Constantin Ionel reported multiple 10b5-1 sales of AMPX common stock on 12/11/2025, 01/21/2026, 01/22/2026, 01/23/2026, 01/28/2026, and 01/22/2026 (see amounts below).

Rhea-AI Filing Summary

AMPX insider transactions: Stefan Constantin Ionel reported multiple 10b5-1 sales of AMPX common stock on 12/11/2025, 01/21/2026, 01/22/2026, 01/23/2026, 01/28/2026, and 01/22/2026 (see amounts below). The filing also records a release of restricted stock units of 52,257 shares on 02/20/2026 labeled as Compensation.

Representative 10b5-1 sales shown include 125,000 shares on 12/11/2025 (proceeds 1313575) and 492,827 shares on 01/22/2026 (proceeds 5931912.19). Broker listed: Morgan Stanley Smith Barney LLC.

Insights

Corporate Actions Analyst

Multiple planned sales under a 10b5-1 plan and an RSU release are reported for AMPX.

Reported transactions list several 10b5-1 sales by Stefan Constantin Ionel, including 125,000 shares (proceeds 1313575) and 492,827 shares (proceeds 5931912.19), plus an RSU release of 52,257 shares on 02/20/2026.

These entries are transactional disclosures of insider selling and a compensation-related RSU release; cash‑flow recipients and any broader company action are not detailed in the excerpt. Subsequent filings may provide additional context such as total holdings or plan terms.

Equity Compensation Specialist

RSU vesting and 10b5-1 dispositions are disclosed, showing compensation and planned disposition activity.

The excerpt explicitly labels the 52,257 shares as a restricted stock unit release for compensation on 02/20/2026. Multiple sales executed under a 10b5-1 plan are itemized with share counts and gross proceeds figures.

These items reflect routine insider compensation and prearranged sales; the filing does not state remaining beneficial ownership or whether other lockups or limits apply.

FAQ

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

What 10b5-1 sales were reported for AMPX?

The filing lists multiple 10b5-1 sales by Stefan Constantin Ionel on dates including 12/11/2025, 01/21/2026, and 01/22/2026. The excerpt shows per‑trade share counts and gross proceeds values for each sale.

How many RSUs vested or were released for AMPX?

The excerpt records a release of 52,257 restricted stock units on 02/20/2026 labeled as Compensation. No further vesting schedule or cash‑treatment detail is provided in the excerpt.

Who executed the brokered trades listed in the AMPX filing?

The broker named in the filing is Morgan Stanley Smith Barney LLC, with an address shown as 1 New York Plaza, 38th fl., New York, NY. The excerpt pairs that broker with the listed transactions.

What were the largest sales amounts shown in the AMPX excerpt?

Representative large sales include 125,000 shares on 12/11/2025 (proceeds 1313575) and 492,827 shares on 01/22/2026 (proceeds 5931912.19). Each line lists share count and gross proceeds.

Does the filing state remaining insider ownership after these sales for AMPX?

The provided excerpt does not state remaining beneficial ownership or shares outstanding tied to the reporting person. It lists executed sales and an RSU release but not post‑transaction holdings.

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

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Accepted by SEC EDGAR 02/24/2026 - 05:07 PM Learn about SEC filing dates

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	0001940928
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	AMPRIUS TECHNOLOGIES INC
SEC File Number	001-41314
Address of Issuer	1180 Page Ave., Fremont CALIFORNIA 94538
Phone	8004258803
Name of Person for Whose Account the Securities are To Be Sold	Stefan Constantin Ionel
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	Officer

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 1 New York Plaza, 38th fl. New York NY 10004	25366	257719	136650964	02/23/2026	NYSE

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	02/20/2026	Release of restricted stock units	Issuer			52257	02/20/2026	Compensation

* 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
10b5-1 Sales for STEFAN CONSTANTIN IONEL 1180 Page Avenue Fremont CA 94538	Common	12/11/2025	125000	1313575
10b5-1 Sales for STEFAN CONSTANTIN IONEL 1180 Page Avenue Fremont CA 94538	Common	12/11/2025	73255	769807.49
10b5-1 Sales for STEFAN CONSTANTIN IONEL 1180 Page Avenue Fremont CA 94538	Common	01/21/2026	73280	879411.3
10b5-1 Sales for STEFAN CONSTANTIN IONEL 1180 Page Avenue Fremont CA 94538	Common	01/22/2026	492827	5931912.19
10b5-1 Sales for STEFAN CONSTANTIN IONEL 1180 Page Avenue Fremont CA 94538	Common	01/23/2026	1600	19200
10b5-1 Sales for STEFAN CONSTANTIN IONEL 1180 Page Avenue Fremont CA 94538	Common	01/28/2026	39690	476351.44

144: Remarks and Signature

Remarks	SHARES TO BE SOLD TO COVER WITHHOLDING TAXES UPON VESTING OF RESTRICTED STOCK UNIT AWARDS
Date of Notice	02/24/2026
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	/s/Constantin Ionel Stefan
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)