MannKind (MNKD) director reports vesting of 45,025 performance-based stock options

Rhea-AI Filing Summary

MannKind Corp director Steven B. Binder reported the vesting of performance-based stock options. On February 26, 2026, a defined performance milestone was achieved under an option originally granted on August 24, 2017, resulting in a grant-credited acquisition of 45,025 employee stock options at an exercise price of $0.00 per option.

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).

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 CT 06810

(City) (State) (Zip)

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)

3. Date of Earliest Transaction (Month/Day/Year)
02/26/2026

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

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

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
Employee Stock Option (right to buy)	$1.47	02/26/2026		A(1)		45,025		02/26/2026	08/23/2027	Stock Options	45,025	$0.00	45,025	D

Explanation of Responses:

1. On August 24, 2017, the reporting person was granted an option that vests upon the achievement of certain defined performance milestones. On February 26, 2026, one of the defined performance milestones was met, resulting in the partial vesting of the option.

	/s/ Steven B. Binder	03/02/2026
	** 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.

FAQ

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

Steven B. Binder reported the vesting of 45,025 employee stock options. These options became exercisable when a defined performance milestone was achieved on February 26, 2026, under an award originally granted on August 24, 2017, and were recorded at an exercise price of $0.00 per option.

Was the MannKind (MNKD) Form 4 transaction a purchase or a sale?

The MannKind Form 4 reports an acquisition of derivative securities, not a sale. Binder received 45,025 employee stock options through partial vesting of a 2017 performance-based grant after a defined milestone was met on February 26, 2026, with no cash purchase price reported.

How many MannKind stock options did Steven B. Binder acquire in this Form 4?

Steven B. Binder acquired 45,025 employee stock options in this transaction. The options vest as performance milestones are reached, and one such milestone was achieved on February 26, 2026, triggering this partial vesting from an option award originally granted on August 24, 2017.

What triggered the option vesting reported by MNKD insider Steven B. Binder?

The vesting was triggered when a defined performance milestone was achieved. The Form 4 footnote explains that a performance condition under an August 24, 2017 option grant was met on February 26, 2026, causing part of that option to vest into 45,025 employee stock options.

Does the Steven B. Binder Form 4 for MNKD indicate direct or indirect ownership?

The Form 4 shows the 45,025 employee stock options as directly owned. The transaction is coded with a direct ownership indicator, and there is no footnote transferring voting or investment authority to any trust, partnership, or other related entity.