MannKind (NASDAQ: MNKD) officer sale under 10b5-1 plan on Jan. 8, 2026

Rhea-AI Filing Summary

MannKind Corporation reported an insider stock sale by Chief People & Workplace Officer Stuart A. Tross. On January 8, 2026, he sold 47,006 shares of MannKind common stock at a price of $6.33 per share. After this transaction, he continued to beneficially own 985,007 shares of common stock in direct ownership form. The filing notes that the sale occurred pursuant to a pre-established Rule 10b5-1 trading plan that was put in place on June 17, 2025, indicating the trades were scheduled in advance.

Insider Trade Summary

Net Seller: 47,006 shares

Net Sell 1 txn

Insider Tross Stuart A

Role Chief People & Workpl Officer

Sold 47,006 shs ($298K)

Type	Security	Shares	Price	Value
Sale	Common Stock, $0.01 Par Value	47,006	$6.33	$298K

Holdings After Transaction: Common Stock, $0.01 Par Value — 985,007 shares (Direct)

Footnotes (1)

1. F1. Transaction occured pursuant to Rule 10B5-1 Plan established June 17, 2025.

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Form 4 Insider Transactions: What Each Field Means →

Accepted by SEC EDGAR 01/09/2026 - 08:30 PM Learn about SEC filing dates

FAQ

What did MannKind (MNKD) disclose in this Form 4 filing?

MannKind disclosed that Chief People & Workplace Officer Stuart A. Tross sold shares of MannKind common stock in a reported insider transaction.

How many MannKind (MNKD) shares did Stuart A. Tross sell and at what price?

Stuart A. Tross sold 47,006 shares of MannKind common stock at a price of $6.33 per share on January 8, 2026.

How many MannKind (MNKD) shares does Stuart A. Tross own after the reported sale?

Following the reported transaction, Stuart A. Tross beneficially owned 985,007 shares of MannKind common stock in direct ownership.

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

Yes. The filing states the transaction occurred pursuant to a Rule 10b5-1 trading plan that was established on June 17, 2025.

What is the role of Stuart A. Tross at MannKind (MNKD)?

Stuart A. Tross is an officer of MannKind Corporation, serving as Chief People & Workplace Officer as indicated in the filing.

Is the MannKind (MNKD) Form 4 filed by one or multiple reporting persons?

The Form 4 is indicated as being filed by one reporting person, namely Stuart A. Tross.

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^*

Tross Stuart A

(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)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Chief People & Workpl Officer

3. Date of Earliest Transaction (Month/Day/Year)
01/08/2026

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
Common Stock, $0.01 Par Value	01/08/2026		S(1)		47,006	D	$6.33	985,007	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 occured pursuant to Rule 10B5-1 Plan established June 17, 2025.

	/s/ Stuart A. Tross	01/09/2026
	** 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.