Beta Bionics CFO sells 6,675 shares for taxes

Rhea-AI Filing Summary

Beta Bionics, Inc. (BBNX) reported that Chief Financial Officer Stephen Feider sold 6,675 shares of common stock on September 2, 2026 at a weighted average price of $19.1131 per share, with prices ranging from $18.89 to $19.545, to cover tax withholding obligations from vesting restricted stock units, and now holds 159,378 shares directly. No Rule 10b5-1 trading plan is reported.

Insider Trade Summary

Net Seller: 6,675 shares

Net Sell 1 txn

Insider Feider Stephen

Role Chief Financial Officer

Sold 6,675 shs ($128K)

Type	Security	Shares	Price	Value
Sale	Common Stock F1, F2	6,675	$19.1131	$128K

Holdings After Transaction: Common Stock — 159,378 shares (Direct)

Footnotes (2)

1. F1. The shares were sold to cover tax withholding obligations associated with the vesting of restricted stock units.
2. F2. The weighted average sale price for the transaction reported was $19.1131 and the range of prices were between $18.89 and $19.545. Upon request by the SEC staff, the Issuer, or any security holder of the Issuer, full information regarding the number of shares sold at each separate price will be provided.

Key Figures

Shares sold: 6,675 shares Weighted average sale price: $19.1131 per share Sale price range: $18.89–$19.545 per share +2 more

5 metrics

Shares sold 6,675 shares Common stock sold by CFO on September 2, 2026

Weighted average sale price $19.1131 per share Average price for the 6,675 shares sold

Sale price range $18.89–$19.545 per share Range of prices for the reported sale transaction

Shares held after transaction 159,378 shares Direct common stock ownership of CFO following the sale

Net shares sold in period 6,675 shares Net buy/sell activity for this Form 4

Key Terms

restricted stock units, tax withholding obligations, weighted average sale price

3 terms

restricted stock units financial

"associated with the vesting of restricted stock units"

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.

tax withholding obligations financial

"sold to cover tax withholding obligations associated"

weighted average sale price financial

"The weighted average sale price for the transaction"

FAQ

What insider transaction did BBNX report for its CFO?

Beta Bionics reported that CFO Stephen Feider sold 6,675 shares of common stock on September 2, 2026 at a weighted average price of $19.1131 per share, primarily to cover tax withholding obligations from vesting restricted stock units.

How many BBNX shares does the CFO hold after this Form 4 transaction?

After the September 2, 2026 sale, CFO Stephen Feider directly holds 159,378 shares of Beta Bionics common stock, according to the Form 4 disclosure.

At what prices were the BBNX shares sold by the CFO?

The transaction had a weighted average sale price of $19.1131 per share, with individual sale prices ranging between $18.89 and $19.545 per share. Detailed breakdowns by price level are available upon request to the company or the SEC staff.

Why did the BBNX CFO sell 6,675 shares?

The filing states the 6,675 shares were sold to cover tax withholding obligations associated with the vesting of restricted stock units, indicating the sale was connected to an equity compensation event.

Was the BBNX CFO’s sale made under a Rule 10b5-1 trading plan?

No. The Form 4 indicates no Rule 10b5-1 trading plan is reported for this transaction, and the footnotes do not reference any pre-arranged trading plan.

How large was the net insider selling by the BBNX CFO in this filing?

The Form 4 shows a single sale transaction of 6,675 shares of Beta Bionics common stock, resulting in net selling of 6,675 shares for the reporting period covered by this filing.

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Available on EDGAR 09/03/2026 - 06:18 PM Accepted by SEC EDGAR 09/03/2026 - 06:15 PM Learn about SEC filing dates

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Feider Stephen

(Last) (First) (Middle)

C/O BETA BIONICS, INC.

11 HUGHES

(Street)

IRVINE CALIFORNIA 92618

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
Beta Bionics, Inc. [ BBNX ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Chief Financial Officer

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
09/02/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	09/02/2026		S(1)		6,675	D	$19.1131(2)	159,378	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. The shares were sold to cover tax withholding obligations associated with the vesting of restricted stock units.

2. The weighted average sale price for the transaction reported was $19.1131 and the range of prices were between $18.89 and $19.545. Upon request by the SEC staff, the Issuer, or any security holder of the Issuer, full information regarding the number of shares sold at each separate price will be provided.

	/s/ Stephen Feider	09/03/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)