BBNX insider files Form 144 to sell common stock

Stephen Feider submitted a Form 144 notice reporting proposed sales of Common Stock tied to Beta Bionics, Inc./BBNX.

Rhea-AI Filing Summary

Stephen Feider submitted a Form 144 notice reporting proposed sales of Common Stock tied to Beta Bionics, Inc./BBNX. The filing lists Restricted Stock Units vesting under a registered plan dated 03/01/2026 and shows prior sale entries dated 12/02/2025 and 01/02/2026.

Insights

Equity Capital Markets Analyst

Routine pre-sale notice for common shares and vesting RSUs; no proceeds treatment specified.

The notice lists the class as Common Stock and identifies Restricted Stock Units vesting under a registered plan dated 03/01/2026. The filing signals planned disposition rather than an executed block trade.

Prior entries for the reporting person appear on 12/02/2025 and 01/02/2026, with numeric values shown in the excerpt; timing and cash‑flow treatment are not detailed in the provided excerpt.

FAQ

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

Who filed the Form 144 for BBNX?

The filing lists Stephen Feider as the reporting person, with an address c/o Beta Bionics, Inc. The form shows entries tied to proposed sales of Common Stock and identifies related RSUs vesting under a registered plan.

What securities does the BBNX Form 144 cover?

The notice covers Common Stock and references Restricted Stock Units vesting under a registered plan dated 03/01/2026. The record ties the proposed sales to compensation-related vesting under that registered plan.

What dates are shown in the BBNX filing?

The excerpt shows an RSU vesting date of 03/01/2026 and prior sale entries dated 12/02/2025 and 01/02/2026. Those dates appear next to the Common Stock entries in the provided content.

Does the Form 144 state how much cash will be received?

The excerpt displays numeric values adjacent to sale entries (for example, 41862.33 and 590680.00), but it does not label proceeds or specify who receives cash in the provided excerpt.

Is the Form 144 an executed sale or a proposed sale?

Form 144 is a notice of proposed sale; the excerpt lists securities "to be sold" and vesting RSUs, indicating planned dispositions rather than confirming completed market trades.

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

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Accepted by SEC EDGAR 03/04/2026 - 04:56 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	0002048588
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	BETA BIONICS, INC.
SEC File Number	001-42491
Address of Issuer	11 HUGHES IRVINE CALIFORNIA 92618
Phone	949-427-7785
Name of Person for Whose Account the Securities are To Be Sold	Stephen Feider
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 Stock	Morgan Stanley Smith Barney LLC 1 New York Plaza New York NY 10004	1428	17878.56	44382146	03/02/2026	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	03/01/2026	Restricted Stock Units vesting under registered plan	Issuer			1428	03/01/2026	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

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
Stephen Feider c/o Beta Bionics, Inc. 11 Hughes Irvine CA 92618	Common Stock	12/02/2025	1427	41862.33
Stephen Feider c/o Beta Bionics, Inc. 11 Hughes Irvine CA 92618	Common Stock	01/02/2026	20000	590680.00

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	03/04/2026
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/ Stephen Feider
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)