MannKind director gets 82,781 restricted stock units

Kay Sabrina reported acquisition or exercise transactions in this Form 4 filing.

Rhea-AI Filing Summary

Kay Sabrina reported acquisition or exercise transactions in this Form 4 filing.

MannKind Corporation director Sabrina Kay reported a compensation-related stock award rather than an open-market trade. On May 20, 2026, she received a grant of 82,781 restricted stock units (RSUs), each representing a contingent right to one share of MannKind common stock. The RSU grant is shown with a price of $0.0000 per unit, reflecting that it is an award, not a purchase. The filing also shows she holds 107,033 shares of common stock directly after the reported transactions and 82,781 RSUs outstanding. A footnote explains that 158,567 shares representing deferred restricted stock units had been inadvertently included in prior common-stock holdings and are now correctly reflected as deferred RSUs.

Insider Trade Summary

Grant/Award: 82,781 shares

Grant/Award 2 txns

Insider Kay Sabrina

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Restricted Stock Unit	82,781	$0.00	$0.00
holding	Common Stock $0.01 Par Value	--	--	--

Holdings After Transaction: Restricted Stock Unit — 82,781 contracts (Direct); Common Stock $0.01 Par Value — 107,033 shares (Direct)

Footnotes (3)

1. F1. 158,567 shares representing deferred restricted stock units were inadvertently included in Table I holdings on prior filings.
2. F2. Each restricted stock unit represents a contingent right to receive one share of MNKD common stock.
3. F3. Restricted stock unit vested on May 20, 2026, but the shares will not be delivered until there is a separation of service from the board of directors of MannKind Corporation.

Key Figures

RSUs granted: 82,781 units RSU grant price: $0.0000 per unit Common shares held: 107,033 shares +2 more

5 metrics

RSUs granted 82,781 units Restricted Stock Unit grant on May 20, 2026

RSU grant price $0.0000 per unit Equity award, not a purchase transaction

Common shares held 107,033 shares Direct MannKind common stock after reported transactions

Underlying common shares 82,781 shares Shares underlying the new restricted stock units

Deferred RSUs previously misclassified 158,567 units Deferred restricted stock units formerly included in common holdings

Key Terms

Restricted Stock Unit, deferred restricted stock units, contingent right to receive one share, separation of service

4 terms

Restricted Stock Unit financial

"security_title: "Restricted Stock Unit" and footnote F2 describing each unit"

A restricted stock unit is a promise from a company to give an employee shares of stock after certain conditions are met, like staying with the company for a set amount of time. It’s like earning a bonus that turns into company stock once you’ve proven your commitment, making it a way to motivate and reward employees.

deferred restricted stock units financial

"158,567 shares representing deferred restricted stock units were inadvertently included"

Deferred restricted stock units are promises by a company to give employees or executives company shares at a future date, subject to conditions like continued employment or performance targets; the delivery and tax event are intentionally delayed. They matter to investors because they affect when new shares may be issued and how executives are motivated—like a paycheck held in escrow that vests over time, influencing potential share dilution and management behavior.

contingent right to receive one share financial

"Each restricted stock unit represents a contingent right to receive one share of MNKD common stock"

separation of service financial

"shares will not be delivered until there is a separation of service from the board of directors"

FAQ

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

What did MannKind (MNKD) director Sabrina Kay report in this Form 4?

Sabrina Kay reported a grant of 82,781 restricted stock units as compensation, not an open-market trade. The filing also confirms her direct common stock holdings and clarifies the treatment of previously misclassified deferred restricted stock units.

How many restricted stock units did Sabrina Kay receive from MannKind (MNKD)?

She received 82,781 restricted stock units. Each unit represents a contingent right to receive one share of MannKind common stock, reflecting an equity-based award rather than a cash salary payment or open-market share purchase.

What does each restricted stock unit represent for MannKind (MNKD) director Sabrina Kay?

Each restricted stock unit represents a contingent right to receive one share of MannKind common stock. This means the units convert into shares when specific conditions are met, aligning the director’s compensation with the company’s long-term share performance.

When will Sabrina Kay’s MannKind (MNKD) RSU shares be delivered?

The restricted stock unit vested on May 20, 2026, but the shares will not be delivered until there is a separation of service from MannKind’s board. This defers actual share delivery until her board service ends.

How many MannKind (MNKD) common shares does Sabrina Kay hold after this filing?

After the reported transactions, she holds 107,033 shares of MannKind common stock directly. In addition, she has 82,781 restricted stock units outstanding that are designed to convert into common shares upon satisfaction of delivery conditions.

What correction did MannKind (MNKD) disclose about prior Sabrina Kay filings?

The filing notes that 158,567 shares representing deferred restricted stock units were inadvertently included in prior common stock holdings. They are now correctly classified as deferred RSUs, improving the accuracy of reported ownership categories.

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

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Accepted by SEC EDGAR 05/22/2026 - 08:47 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).

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^*

Kay Sabrina

(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)
05/20/2026

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								107,033(1)	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
Restricted Stock Unit	(2)	05/20/2026		A(3)		82,781		(3)	(3)	Common Stock, $0.01 Par Value	82,781	$0	82,781	D

Explanation of Responses:

1. 158,567 shares representing deferred restricted stock units were inadvertently included in Table I holdings on prior filings.

2. Each restricted stock unit represents a contingent right to receive one share of MNKD common stock.

3. Restricted stock unit vested on May 20, 2026, but the shares will not be delivered until there is a separation of service from the board of directors of MannKind Corporation.

	/s/ Sabrina Kay	05/22/2026
	** 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)