CNM (CNM) affiliate plans to sell 49,065 Class A shares after option exercise

Rhea-AI Filing Summary

CNM affiliate filed a Form 144 reporting proposed sales of Class A shares. The notice lists 49,065 shares tied to a stock option exercise and cash proceeds method. The filing also records recent dispositions by Mark Whittenburg of 21,976 shares (05/27/2026) and 18,814 shares (05/29/2026) with stated proceeds.

Insights

Insider Transactions Analyst

Routine affiliate resale notice showing planned sale after option exercise and recent insider dispositions.

The filing lists 49,065 Class A shares connected to a stock option exercise with cash proceeds as the method of sale. This is a standard Form 144 disclosure that notifies the market of an affiliate's intent to sell.

Recent reported sales by Mark Whittenburg total 40,790 shares across two transactions dated 05/27/2026 and 05/29/2026. Timing and execution details beyond the listed methods are not provided in the excerpt.

Key Figures

Proposed sale: 49,065 shares Sale on 05/27/2026: 21,976 shares Proceeds 05/27/2026: $1,088,326.62 +2 more

5 metrics

Proposed sale 49,065 shares Class A, stock option exercise

Sale on 05/27/2026 21,976 shares Mark Whittenburg disposition

Proceeds 05/27/2026 $1,088,326.62 Proceeds from 21,976-share sale

Sale on 05/29/2026 18,814 shares Mark Whittenburg disposition

Proceeds 05/29/2026 $931,293.00 Proceeds from 18,814-share sale

Key Terms

Form 144, Stock Option Exercise, Class A

3 terms

Form 144 regulatory

"lists proposed sales of restricted or control securities"

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.

Stock Option Exercise financial

"Stock Option Exercise | Issuer | 49065"

A stock option exercise is the act of using a previously granted right to buy shares of a company's stock at a specific, predetermined price by paying that price and receiving the shares. It matters to investors because exercising changes who owns the shares (which can dilute existing ownership), can trigger taxable events and shift potential gains or losses, and affects voting power and the company’s outstanding share count—like turning a voucher into an actual product that becomes part of circulating supply.

Class A market

"Class A | 06/30/2026 | Stock Option Exercise"

Class A denotes a specific group of a company’s shares that carry a particular set of rights—most commonly different voting power or dividend priority compared with other share classes. Think of it like different seats on a bus where some seats let you steer and others only ride: knowing whether a share is Class A tells investors how much influence they have over company decisions and how returns might be distributed, which affects control and value.

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Available on EDGAR 06/30/2026 - 12:37 PM Accepted by SEC EDGAR 06/30/2026 - 12:37 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
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
Class A	Fidelity Brokerage Services LLC 900 Salem Street Smithfield RI 02917	49065	2355120.00	187192831	06/30/2026	NYSE

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 *
Class A	06/30/2026	Stock Option Exercise	Issuer			49065	06/30/2026	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
Mark Whittenburg 1830 Craig Park Court St. Louis MO 63146	Class A	05/27/2026	21976	1088326.62
Mark Whittenburg 1830 Craig Park Court St. Louis MO 63146	Class A	05/29/2026	18814	931293.00

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 CNM's Form 144 disclose?

It discloses a proposed sale of 49,065 Class A shares related to a stock option exercise, and identifies recent insider sales by Mark Whittenburg on 05/27/2026 and 05/29/2026.

Who is the insider named in the CNM Form 144?

The filing names Mark Whittenburg and lists his transactions: 21,976 shares sold on 05/27/2026 and 18,814 shares sold on 05/29/2026, with proceeds shown for each trade.

How many shares does the Form 144 propose to sell for CNM?

The notice lists a proposed sale of 49,065 Class A shares, described as arising from a stock option exercise with cash as the proceeds method.

What proceeds are reported for the recent insider sales?

Proceeds reported are $1,088,326.62 for the 21,976-share sale on 05/27/2026 and $931,293.00 for the 18,814-share sale on 05/29/2026.