MannKind director files notice to sell 33,558 shares

Director Steven Binder filed a Rule 144 notice for a planned sale of MannKind common stock, following earlier 10b5-1 plan sales in recent months.

Rhea-AI Filing Summary

MannKind Corporation (MNKD) received a notice under Rule 144 that director Steven Binder plans to sell up to 33,558 shares of MannKind common stock through Morgan Stanley Smith Barney LLC. The shares relate to restricted stock units acquired from MannKind on July 15, 2026.

The notice also lists prior Rule 10b5-1 plan sales of MannKind common stock by Steven Binder during the preceding three months.

Key Figures

Shares to be sold under Rule 144: 33,558 shares Aggregate market value of planned sale: $132,218.52 Shares outstanding referenced: 321,540,637 shares +2 more

5 metrics

Shares to be sold under Rule 144 33,558 shares Planned sale of MannKind common stock by Steven Binder

Aggregate market value of planned sale $132,218.52 Value associated with 33,558 shares in the Rule 144 notice

Shares outstanding referenced 321,540,637 shares MannKind common stock referenced for Rule 144 calculations

10b5-1 sale on August 7, 2026 39,051 shares; $158,562.68 Reported prior 10b5-1 sale of MannKind common stock

10b5-1 sale on July 17, 2026 52,485 shares; $212,837.17 Reported prior 10b5-1 sale of MannKind common stock

Key Terms

Rule 144, Restricted Stock Units, 10b5-1

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

"Common | 07/15/2026 | Restricted Stock Units | Issuer"

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.

10b5-1 regulatory

"10b5-1 Sales for STEVEN BINDER 1 Casper Street Danbury CT 06810"

A 10b5-1 plan is a pre-set schedule that lets company insiders buy or sell shares according to written instructions made when they do not possess material, nonpublic information. Think of it as a timed automatic payment for stock trades: it helps insiders avoid accusations of trading on secret information and gives outside investors a clearer signal about whether sales are routine or potentially informative about the company’s prospects.

FAQ

What does the Form 144 filing disclose for MannKind (MNKD)?

The filing discloses that director Steven Binder has filed a Rule 144 notice to sell up to 33,558 shares of MannKind common stock, related to restricted stock units acquired from MannKind on July 15, 2026, through Morgan Stanley Smith Barney LLC.

How many MannKind (MNKD) shares are covered by Steven Binder’s planned sale?

Steven Binder’s Rule 144 notice covers a proposed sale of up to 33,558 shares of MannKind common stock. The filing lists an aggregate market value of approximately $132,218.52 for these shares at the time of the notice.

What prior 10b5-1 plan sales by Steven Binder in MNKD stock are reported?

The filing reports Rule 10b5-1 plan sales of MannKind common stock by Steven Binder on August 7, 2026 for 39,051 shares with proceeds of $158,562.68, and on July 17, 2026 for 52,485 shares with proceeds of $212,837.17.

How many MannKind (MNKD) shares were outstanding as referenced in the Form 144?

The notice references 321,540,637 shares of MannKind common stock outstanding in connection with the Rule 144 calculations. This figure is used as a baseline for determining allowable sales volume under Rule 144.

What type of securities is Steven Binder selling in this MannKind (MNKD) Form 144?

The securities are common stock of MannKind Corporation, related to restricted stock units acquired from the issuer on July 15, 2026. The planned sale of up to 33,558 shares will be executed through Morgan Stanley Smith Barney LLC.

Does the MannKind (MNKD) Form 144 mention Rule 10b5-1 trading plans?

Yes. The filing identifies prior sales in the last three months as “10b5-1 Sales for Steven Binder”, including transactions on July 17, 2026 and August 7, 2026, indicating those earlier sales were made under a Rule 10b5-1 plan.

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

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Available on EDGAR 09/10/2026 - 04:43 PM Accepted by SEC EDGAR 09/10/2026 - 04:43 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	0001712601
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	MannKind Corporation
SEC File Number	000-50865
Address of Issuer	1 Casper Street Danbury CONNECTICUT 06810
Phone	8186615000
Name of Person for Whose Account the Securities are To Be Sold	STEVEN BINDER
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	Director

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	33558	132218.52	321540637	09/10/2026	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	07/15/2026	Restricted Stock Units	Issuer			33558	07/15/2026	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 STEVEN BINDER 1 Casper Street Danbury CT 06810	Common	08/07/2026	39051	158562.68
10b5-1 Sales for STEVEN BINDER 1 Casper Street Danbury CT 06810	Common	07/17/2026	52485	212837.17

144: Remarks and Signature

Remarks
Date of Notice	09/10/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	12/02/2025
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/ Steven Binder
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)