Beta Bionics officer plans $541K stock sale

A Beta Bionics officer notified intent to sell 28,119 BBNX shares under Rule 144, mainly from option exercises and vested RSUs.

Available on EDGAR 09/16/2026 - 04:32 PM EDT Accepted by SEC EDGAR 09/16/2026 - 04:31 PM EDT Learn about SEC filing dates

Rhea-AI Filing Summary

Beta Bionics, Inc. (BBNX) officer Mark Hopman has filed a notice to sell 28,119 shares of common stock under Rule 144, with an aggregate market value of $540,728.37, when Beta Bionics had 44,989,688 shares outstanding.

The planned sales relate to 25,265 shares acquired through the exercise of stock options on September 16, 2026, and 2,854 shares acquired upon vesting of restricted stock units on June 1, 2025.

Key Figures

Shares to be sold under Rule 144: 28,119 shares Aggregate market value of planned sale: $540,728.37 Shares outstanding: 44,989,688 shares +3 more

6 metrics

Shares to be sold under Rule 144 28,119 shares Common stock listed for sale through Morgan Stanley Smith Barney LLC

Aggregate market value of planned sale $540,728.37 Value of 28,119 Beta Bionics common shares listed for sale

Shares outstanding 44,989,688 shares Beta Bionics common stock outstanding when the notice was filed

Shares from stock option exercise 25,265 shares Common shares to be sold acquired by option exercise on September 16, 2026

Shares from RSU vesting 2,854 shares Common shares to be sold acquired from restricted stock unit vesting on June 1, 2025

Recent 10b5-1 sale (largest) 36,870 shares for $680,723.44 Common shares sold on September 9, 2026 under a 10b5-1 plan

Key Terms

Rule 144, restricted stock units, Exercise of Stock Options, 10b5-1 Sales

4 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

"The securities to be sold were acquired upon 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.

Exercise of Stock Options financial

"Common | 09/16/2026 | Exercise of Stock Options | Issuer"

10b5-1 Sales regulatory

"10b5-1 Sales for MARK AUGUST HOPMAN 11 Hughes Irvine CA 92618"

10b5-1 sales are pre-arranged stock-trading plans that let company insiders automatically buy or sell shares according to a fixed schedule or formula, even if they later learn confidential information. Think of it as setting up an automatic thermostat for trades: it creates a clear, documented path that can protect insiders from insider-trading accusations and gives investors a signal about predictable insider activity—though it can also simply be a way for insiders to diversify or raise cash.

FAQ

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

What is Beta Bionics (BBNX) insider Mark Hopman planning to sell under Rule 144?

Mark Hopman filed to sell 28,119 shares of Beta Bionics common stock under Rule 144, with an aggregate market value of $540,728.37, through Morgan Stanley Smith Barney LLC on NASDAQ.

How were the BBNX shares to be sold by Mark Hopman acquired?

The notice states 25,265 shares were acquired via exercise of stock options on September 16, 2026, and 2,854 shares were acquired upon vesting of restricted stock units on June 1, 2025.

What recent BBNX share sales has Mark Hopman reported in the last 3 months?

Reported past 3‑month sales include 36,870 shares for $680,723.44 on September 9, 2026, 5,327 shares for $101,815.48 on September 2, 2026, 775 shares for $12,028.00 on September 14, 2026, and 1,258 shares for $18,880.44 on June 24, 2026.

What portion of Beta Bionics (BBNX) share capital does the planned Rule 144 sale represent?

The notice lists 28,119 shares to be sold when 44,989,688 shares of Beta Bionics common stock were outstanding, indicating the sale involves a small fraction of the company’s outstanding shares.

Were any of Mark Hopman’s recent BBNX sales made under a 10b5-1 trading plan?

Yes. The sales of 775 shares on September 14, 2026 and 36,870 shares on September 9, 2026 are described as 10b5-1 sales for Mark August Hopman.

What types of Beta Bionics (BBNX) equity awards are involved in Mark Hopman’s planned sales?

The planned sales involve shares acquired from stock option exercises and from the vesting of restricted stock units during the period from June 1, 2025 through June 1, 2026.

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

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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	0002048497
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	9494277785
Name of Person for Whose Account the Securities are To Be Sold	MARK HOPMAN
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 Executive Financial Services 1 New York Plaza 8th Floor New York NY 10004	28119	540728.37	44989688	09/16/2026	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	09/16/2026	Exercise of Stock Options	Issuer			25265	09/16/2026	Cash
Common	06/01/2025	Restricted Stock Units	Issuer			2854	06/01/2025	N/A

* 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 MARK AUGUST HOPMAN 11 Hughes Irvine CA 92618	Common	09/14/2026	775	12028.00
10b5-1 Sales for MARK AUGUST HOPMAN 11 Hughes Irvine CA 92618	Common	09/09/2026	36870	680723.44
MARK HOPMAN 11 Hughes Irvine CA 92618	Common	09/02/2026	5327	101815.48
MARK HOPMAN 11 Hughes Irvine CA 92618	Common	06/24/2026	1258	18880.44

144: Remarks and Signature

Remarks	The securities to be sold were acquired upon the vesting of restricted stock units during the period of 6/1/2025 through 6/1/2026.
Date of Notice	09/16/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	06/10/2026
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/ Mark Hopman
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)