MannKind director sells 16,940 shares in plan

MannKind Corp director Steven B. Binder reported an open-market sale of 16,940 shares of common stock at a weighted average price of $3.29 per share on May 12, 2026, executed under a Rule 10B5-1 trading plan established on December 2, 2025.

Rhea-AI Filing Summary

MannKind Corp director Steven B. Binder reported an open-market sale of 16,940 shares of common stock at a weighted average price of $3.29 per share on May 12, 2026, executed under a Rule 10B5-1 trading plan established on December 2, 2025.

Binder also had 5,560 shares withheld on May 11, 2026 to cover tax obligations arising from the vesting of restricted stock units originally granted on May 10, 2022. Following these transactions, he directly holds 808,008 MannKind shares.

Insider Trade Summary 10b5-1

Net Seller: 16,940 shares

Net Sell 2 txns

Insider Binder Steven B.

Role Director

Sold 16,940 shs ($56K)

Type	Security	Shares	Price	Value
Sale	Common Stock, $0.01 Par Value	16,940	$3.29	$56K
Exercise Price or Tax Liability	Common Stock, $0.01 Par Value	5,560	$3.52	$20K

Holdings After Transaction: Common Stock, $0.01 Par Value — 808,008 shares (Direct)

Footnotes (3)

1. F1. Represents shares withheld to pay tax withholding obligations due on the date of vesting of the Restricted Stock Units originally granted on May 10, 2022.
2. F2. Transaction occurred pursuant to Rule 10B5-1 Plan established December 2, 2025.
3. F3. The weighted average sales price of the reported transaction was $3.29 based on a range of prices between $3.25 and $3.34. 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: 16,940 shares Weighted average sale price: $3.29 per share Tax withholding shares: 5,560 shares +2 more

5 metrics

Shares sold 16,940 shares Open-market sale of common stock on May 12, 2026

Weighted average sale price $3.29 per share Sale price range between $3.25 and $3.34

Tax withholding shares 5,560 shares Withheld May 11, 2026 for RSU tax obligations

Shares held after transactions 808,008 shares Direct MannKind holdings following reported transactions

RSU original grant date May 10, 2022 Restricted Stock Units that vested, triggering tax withholding

Key Terms

Rule 10B5-1 Plan, Restricted Stock Units, tax withholding obligations, weighted average sales price

4 terms

Rule 10B5-1 Plan financial

"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.

Restricted Stock Units financial

"vesting of the Restricted Stock Units originally granted on May 10, 2022."

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.

tax withholding obligations financial

"shares withheld to pay tax withholding obligations due on the date of vesting"

weighted average sales price financial

"The weighted average sales price of the reported transaction was $3.29"

FAQ

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

What insider transaction did Steven B. Binder report at MannKind (MNKD)?

Steven B. Binder reported an open-market sale of 16,940 MannKind common shares. The sale occurred on May 12, 2026 at a weighted average price of $3.29 per share and was executed pursuant to a pre-established Rule 10B5-1 trading plan.

At what price did Steven B. Binder sell MannKind (MNKD) shares?

Binder’s reported sale had a weighted average price of $3.29 per share. The footnotes state the transactions occurred within a price range between $3.25 and $3.34, with detailed breakdowns available to regulators or shareholders upon request.

How many MannKind (MNKD) shares does Steven B. Binder hold after these transactions?

After the reported transactions, Steven B. Binder directly holds 808,008 MannKind common shares. This figure reflects the impact of both the 16,940-share open-market sale and the 5,560 shares withheld to satisfy tax obligations on vested restricted stock units.

Why were 5,560 MannKind (MNKD) shares withheld from Steven B. Binder?

The 5,560 shares were withheld to cover tax withholding obligations on the vesting of restricted stock units. Those RSUs were originally granted on May 10, 2022, and the withholding occurred on May 11, 2026 as a non-market tax settlement transaction.

Was Steven B. Binder’s MannKind (MNKD) share sale pre-planned?

Yes. The filing notes the sale was made pursuant to a Rule 10B5-1 trading plan established on December 2, 2025. Such plans pre-arrange trades, indicating the timing of this 16,940-share sale was set in advance rather than decided opportunistically.

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

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Accepted by SEC EDGAR 05/13/2026 - 08:30 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)
05/11/2026

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	05/11/2026		F		5,560(1)	D	$3.52	824,948	D
Common Stock, $0.01 Par Value	05/12/2026		S(2)		16,940	D	$3.29(3)	808,008	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. Represents shares withheld to pay tax withholding obligations due on the date of vesting of the Restricted Stock Units originally granted on May 10, 2022.

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

3. The weighted average sales price of the reported transaction was $3.29 based on a range of prices between $3.25 and $3.34. 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	05/13/2026
	** 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)