MBX (NASDAQ: MBX) insider sales listed; multiple transactions and option sales

Rhea-AI Filing Summary

MBX reports proposed and recent sales of common stock by a holder and brokerage entries. The filing lists proposed sales of 10,000 shares through Fidelity Brokerage Services LLC and two issuer‑granted option exercises to sell 5,000 shares each, all dated 05/07/2026. It also discloses four completed sales by Richard B. Bartram: 10,000 shares on 03/16/2026, 1,061 shares on 03/25/2026, 10,423 shares on 04/22/2026, and 5,000 shares on 05/01/2026, each with the reported sale proceeds shown in the filing.

Key Figures

Proposed brokerage sale: 10,000 shares Proposed option sale: 5,000 shares Proposed option sale: 5,000 shares +4 more

7 metrics

Proposed brokerage sale 10,000 shares Fidelity Brokerage Services LLC entry dated 05/07/2026

Proposed option sale 5,000 shares Option Granted 04/20/2022; dated 05/07/2026; Cash Common

Proposed option sale 5,000 shares Option Granted 11/07/2022; dated 05/07/2026; Cash Common

Sale by R. B. Bartram 10,000 shares Sold 03/16/2026 for $300,471.00

Sale by R. B. Bartram 1,061 shares Sold 03/25/2026 for $30,217.49

Sale by R. B. Bartram 10,423 shares Sold 04/22/2026 for $341,377.72

Sale by R. B. Bartram 5,000 shares Sold 05/01/2026 for $159,000.00

Key Terms

Form 144, Option Granted, Cash Common, Fidelity Brokerage Services LLC

4 terms

Form 144 regulatory

""144: Securities To Be Sold""

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.

Option Granted financial

""Option Granted 04/20/2022""

Cash Common financial

""05/07/2026 | Cash Common""

Fidelity Brokerage Services LLC other

""Fidelity Brokerage Services LLC 900 Salem Street""

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
Filer CCC
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer

SEC File Number

Address of Issuer

Phone

Name of Person for Whose Account the Securities are To Be Sold

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

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	Fidelity Brokerage Services LLC 900 Salem Street Smithfield RI 02917	10000	322050.00	47597536	05/07/2026	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	05/07/2026	Option Granted 04/20/2022	Issuer			5000	05/07/2026	Cash
Common	05/07/2026	Option Granted 11/07/2022	Issuer			5000	05/07/2026	Cash

* 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
Richard B. Bartram 11711 N. Meridian Street, Suite 300 Carmel IN 46032	Common	03/16/2026	10000	300471.00
Richard B. Bartram 11711 N. Meridian Street, Suite 300 Carmel IN 48032	Common	03/25/2026	1061	30217.49
Richard B. Bartram 11711 N. Meridian Street, Suite 300 Carmel IN 48032	Common	04/22/2026	10423	341377.72
Richard B. Bartram 11711 N. Meridian Street, Suite 300 Carmel IN 48032	Common	05/01/2026	5000	159000.00

144: Remarks and Signature

Remarks

Date of Notice

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

ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)

FAQ

What does MBX's Form 144 disclose about recent sales?

The filing lists completed sales by Richard B. Bartram totaling multiple transactions: 10,000; 1,061; 10,423; and 5,000 shares on specific dates in March–May 2026, with proceeds shown for each sale in the filing.

Who is the broker or intermediary named in the MBX Form 144?

The filing names Fidelity Brokerage Services LLC at 900 Salem Street, Smithfield, RI, in connection with 10,000 shares noted on the securities table dated 05/07/2026.

Are any option-related sales or grants noted in the MBX filing?

Yes. The filing shows entries labeled Option Granted 04/20/2022 and Option Granted 11/07/2022, each tied to proposed sales of 5,000 shares dated 05/07/2026 and identified as Cash Common transactions.

What sale proceeds are reported for Richard B. Bartram's transactions?

The filing reports proceeds for each disclosed sale: $300,471.00 (10,000 shares), $30,217.49 (1,061 shares), $341,377.72 (10,423 shares), and $159,000.00 (5,000 shares), as listed in the excerpt.