MannKind director sells 33,558 shares at $3.81

A MannKind Corp director sold 33,558 MNKD shares under a pre-established Rule 10b5-1 trading plan, retaining 752,309 shares afterward.

Rhea-AI Filing Summary

MANNKIND CORP (MNKD) director Steven B. Binder reported selling 33,558 shares$3.81 per share752,309 shares

Insider Trade Summary 10b5-1

Net Seller: 33,558 shares

Net Sell 1 txn

Insider Binder Steven B.

Role Director

Sold 33,558 shs ($128K)

Type	Security	Shares	Price	Value
Sale	Common Stock, $0.01 Par Value F1, F2	33,558	$3.81	$128K

Holdings After Transaction: Common Stock, $0.01 Par Value — 752,309 shares (Direct)

Footnotes (2)

1. F1. Transaction occurred pursuant to Rule 10B5-1 Plan established December 2, 2025.
2. F2. The weighted average sales price of the reported transaction was $3.81 based on a range of prices between $3.76 and $3.87. 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: 33,558 shares Weighted average sale price: $3.81 per share Price range of sales: $3.76–$3.87 per share +2 more

5 metrics

Shares sold 33,558 shares Sale of MannKind common stock on September 10, 2026 by director Steven B. Binder

Weighted average sale price $3.81 per share Average price for the 33,558 shares sold within a $3.76–$3.87 range

Price range of sales $3.76–$3.87 per share Range of individual trade prices for the reported sale

Shares held after transaction 752,309 shares Direct holdings of Steven B. Binder after the September 10, 2026 sale

Rule 10B5-1 plan adoption date December 2, 2025 Date the trading plan governing this sale was established

Key Terms

Rule 10B5-1 Plan, weighted average sales price, open market or private transaction

3 terms

Rule 10B5-1 Plan regulatory

"Transaction occurred pursuant to Rule 10B5-1 Plan established December 2, 2025."

A Rule 10b5-1 plan is a prearranged, written schedule that lets corporate insiders buy or sell company stock at set times or amounts, even if they later learn material nonpublic information. Think of it like setting an automatic thermostat for trades: it creates a clear record that trades were planned in advance, reducing the risk of insider-trading accusations and helping investors trust that insider transactions are routine rather than based on secret information.

weighted average sales price financial

"The weighted average sales price of the reported transaction was $3.81 based on a range of prices"

open market or private transaction market

"Sale in open market or private transaction"

FAQ

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

What insider transaction did MNKD report for Steven B. Binder?

Steven B. Binder reported a sale of 33,558 sharesSeptember 10, 2026$3.81 per share

How many MNKD shares does Steven B. Binder hold after this Form 4 sale?

After the reported sale, Steven B. Binder directly holds 752,309 shares

Was the MNKD insider sale made under a Rule 10b5-1 plan?

Yes. The sale was made pursuant to a Rule 10B5-1 Planestablished on December 2, 2025

What price did the MNKD shares sell for in this insider transaction?

The filing reports a weighted average sales price of $3.81 per share$3.76 to $3.87

How many MNKD shares were sold in this Form 4 filing?

The Form 4 shows that 33,558 sharesSeptember 10, 2026

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

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Available on EDGAR 09/14/2026 - 08:00 PM Accepted by SEC EDGAR 09/14/2026 - 08:00 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).

X

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^*

Binder Steven B.

(Last) (First) (Middle)

1 CASPER STREET

(Street)

DANBURY CONNECTICUT 06810

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
MANNKIND CORP [ MNKD ]

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

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
09/10/2026

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, $0.01 Par Value	09/10/2026		S(1)		33,558	D(1)	$3.81(2)	752,309	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. Transaction occurred pursuant to Rule 10B5-1 Plan established December 2, 2025.

2. The weighted average sales price of the reported transaction was $3.81 based on a range of prices between $3.76 and $3.87. 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/ Steven B. Binder	09/14/2026
	** 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)