ARTV reports proposed sale of 3,500 shares

ARTV reported a proposed sale of 3,500 shares of Common Stock via a Form 144 notice.

Rhea-AI Filing Summary

ARTV reported a proposed sale of 3,500 shares of Common Stock via a Form 144 notice. The shares relate to Restricted Stock Units that vested on 05/15/2026 and are described as compensation for services rendered. The broker listed is Morgan Stanley Smith Barney LLC.

Insights

Securities Compliance Officer

Form 144 shows a routine resale notice for vested RSUs totaling 3,500 shares.

Form 144 registers an intention to sell restricted shares that vested under a registered plan on 05/15/2026. The filing names Morgan Stanley Smith Barney LLC as the broker and classifies the equity as compensation for services.

Regulatory treatment and sale mechanics (timing, sale method) are not specified in the excerpt; subsequent transaction details will appear in trade reports or a Form 4 if applicable.

Key Figures

Form type: Form 144 Shares to be sold: 3,500 shares Vesting date: 05/15/2026

3 metrics

Form type Form 144 Resale notice for restricted shares

Shares to be sold 3,500 shares Common Stock listed on NASDAQ, sale dated <date>05/18/2026</date>

Vesting date 05/15/2026 Restricted Stock Units vested under registered plan

Key Terms

Restricted Stock Units (RSUs), Form 144, Broker-dealer

3 terms

Restricted Stock Units (RSUs) financial

"Restricted Stock Units vesting under registered plan"

Restricted stock units (RSUs) are a type of company promise to give employees shares of stock in the future, usually after certain conditions like working for a set time. They are like a gift promised today that you receive later, which can become valuable if the company's stock price goes up. RSUs matter because they are a way companies reward employees and can be a significant part of compensation.

Form 144 regulatory

"Filer Information | 144: Filer Information"

Form 144 is a document that investors must file with the government when they plan to sell a large number of shares of a company's stock. It helps ensure transparency so everyone knows how many shares are being sold and when, which can impact the stock's price.

Broker-dealer financial

"Morgan Stanley Smith Barney LLC 1 New York Plaza"

A broker-dealer is a licensed firm or individual that both executes trades on behalf of clients (acting as a broker) and buys or sells securities for its own account (acting as a dealer). Investors care because broker-dealers provide the plumbing of markets — they place orders, hold or move cash and securities, offer research or advice, and their stability and fees directly affect trade execution, costs, and the safety of client funds; think of them as a combined travel agent and taxi for your investments.

FAQ

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

What does ARTV's Form 144 disclose?

Form 144 discloses a proposed sale of 3,500 shares of Common Stock tied to RSUs that vested on 05/15/2026. The filing lists Morgan Stanley Smith Barney LLC as the broker and labels the shares as compensation for services.

Are the shares from ARTV registered or compensation-related?

The shares are described as Restricted Stock Units that vested under a registered plan and noted as compensation for services rendered on 05/15/2026. The Form 144 records the intended resale of these vested units.

Who is the broker handling the ARTV sale?

Morgan Stanley Smith Barney LLC is named as the broker on the Form 144. The filing lists the broker's New York address alongside the 3,500-share resale entry dated 05/18/2026.

Does this Form 144 confirm the shares were sold?

No; Form 144 indicates a proposed resale of 3,500 shares under Rule 144 procedures. Actual execution details (trade date, sale price) are not provided in the excerpt and would appear in trade reports or other SEC filings.

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

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Accepted by SEC EDGAR 05/18/2026 - 07:54 PM EDT 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	0002028466
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	ARTIVA BIOTHERAPEUTICS, INC.
SEC File Number	001-42179
Address of Issuer	5505 MOREHOUSE DRIVE, SUITE 100 SAN DIEGO CALIFORNIA 92121
Phone	(858) 267-4467
Name of Person for Whose Account the Securities are To Be Sold	Heather Raymon
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
Relationship to Issuer	Director

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 Stock	Morgan Stanley Smith Barney LLC 1 New York Plaza, 8th Floor New York NY 10004	3500	32270	48588198	05/18/2026	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 Stock	05/15/2026	Restricted Stock Units vesting under registered plan	Issuer			3500	05/15/2026	Compensation for services rendered to Issuer

* 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

Nothing to Report

144: Remarks and Signature

Remarks	This is a sell-to-cover transaction for taxes owed related to recent vesting of stock unit awards granted by the Issuer.
Date of Notice	05/18/2026
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/ Heather Raymon
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)