Beta Bionics officer plans sale of 6,675 shares

Officer Stephen Feider of Beta Bionics, Inc. files a Rule 144 notice to sell shares mainly to cover taxes from recently vested stock unit awards.

Rhea-AI Filing Summary

Beta Bionics, Inc. (BBNX) reports that officer Stephen Feider has filed a notice under Rule 144 for a planned sale of 6,675 shares of common stock through Morgan Stanley Smith Barney LLC. The shares relate to restricted stock units that vested on September 1, 2026 as compensation for services to the issuer.

The filing states this is a sell-to-cover transaction to satisfy taxes owed on recently vested stock unit awards. In the preceding three months, Feider reported sales of 6,676, 5,104, and 4,896 shares of Beta Bionics common stock on various June 2026 dates.

Key Figures

Planned shares to be sold: 6,675 shares Aggregate market value of planned sale: $129,595.13 Shares outstanding: 45,123,368 shares +3 more

6 metrics

Planned shares to be sold 6,675 shares Common stock under Rule 144 notice for Stephen Feider

Aggregate market value of planned sale $129,595.13 Common stock planned sale of 6,675 shares

Shares outstanding 45,123,368 shares Beta Bionics common stock referenced in the notice

Shares sold June 2, 2026 6,676 shares Common stock sold by Stephen Feider during past 3 months

Shares sold June 26, 2026 5,104 shares Common stock sold by Stephen Feider during past 3 months

Shares sold June 29, 2026 4,896 shares Common stock sold by Stephen Feider during past 3 months

Key Terms

Rule 144, Restricted Stock Units, sell-to-cover transaction

3 terms

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.

Restricted Stock Units financial

"Restricted Stock Units vesting under registered plan"

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

sell-to-cover transaction financial

"This is a sell-to-cover transaction for taxes owed related to recent vesting"

A sell-to-cover transaction is when a person granted company stock (for example as part of compensation or option exercise) immediately sells enough of those shares to pay required taxes or exercise costs and keeps the rest. Think of it like cashing part of a bonus to cover the tax bill; it provides necessary cash without the holder needing outside funds. Investors watch these sales because they increase trading volume and slightly reduce insider holdings, but they often reflect routine tax or cost management rather than a judgment on the company’s prospects.

FAQ

What does the Form 144 filing disclose for BBNX?

The filing discloses that Stephen Feider, an officer of Beta Bionics, Inc. (BBNX), filed a Rule 144 notice to sell 6,675 shares of common stock, primarily as a sell-to-cover transaction for taxes related to recently vested restricted stock unit awards.

How many BBNX shares is Stephen Feider planning to sell under this notice?

Stephen Feider plans to sell 6,675 shares of Beta Bionics common stock. The planned sale is associated with restricted stock units that vested on September 1, 2026 and is described as compensation for services rendered to the issuer.

What is the stated purpose of the BBNX share sale in this Form 144?

The purpose is described as a sell-to-cover transaction for taxes owed in connection with the recent vesting of stock unit awards granted by Beta Bionics, Inc. The filing ties the sale to tax obligations rather than to a separate cash-raising objective.

Which broker is handling the planned BBNX share sale?

The planned sale of 6,675 shares of Beta Bionics common stock is listed as being through Morgan Stanley Smith Barney LLC, located at 1 New York Plaza, New York, New York. The common stock is identified as trading on NASDAQ.

What prior BBNX share sales by Stephen Feider are disclosed in the past three months?

The notice lists three prior sales of Beta Bionics common stock in June 2026: 6,676 shares on June 2, 5,104 shares on June 26, and 4,896 shares on June 29, with corresponding stated dollar amounts for each transaction.

How many BBNX shares are outstanding as referenced in this Form 144?

The securities information section references 45,123,368 shares of Beta Bionics common stock outstanding. This figure is provided as context in the Rule 144 notice and is separate from the 6,675 shares covered by the planned sale.

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

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Available on EDGAR 09/03/2026 - 05:23 PM Accepted by SEC EDGAR 09/03/2026 - 05:17 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	6675	129595.13	45123368	09/02/2026	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	09/01/2026	Restricted Stock Units vesting under registered plan	Issuer			6675	09/01/2026	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	06/02/2026	6676	84165
Stephen Feider c/o Beta Bionics, Inc. 11 Hughes Irvine CA 92618	Common Stock	06/26/2026	5104	87006.78
Stephen Feider c/o Beta Bionics, Inc. 11 Hughes Irvine CA 92618	Common Stock	06/29/2026	4896	83380.84

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	09/03/2026
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)