Mobix Labs director granted 31,356 RSUs

MOBX director Kurt Busch reported new RSU grants vesting in late 2026 and disclosed fully vested stock options with exercise prices of $41.80 and $68.40.

Rhea-AI Filing Summary

MOBIX LABS, INC (MOBX) director Kurt Busch reported receiving two equity awards in the form of Restricted Stock Units and also reported existing stock option holdings. On September 14, 2026 he was granted 12,255 RSUs that vest on September 30, 2026 and 19,101 RSUs that vest on October 1, 2026. He also holds fully vested options to purchase Class A Common Stock, covering 2,000 shares at an exercise price of $41.80 per share expiring August 10, 2030, and 13,341 shares at an exercise price of $68.40 per share expiring April 4, 2032.

Insider Trade Summary

Grant/Award: 31,356 shares

Grant/Award 4 txns

Insider Busch Kurt

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Class A Common Stock F1	12,255	$0.00	$0.00
Grant/Award	Class A Common Stock F2	19,101	$0.00	$0.00
holding	Option (Right to Buy) F3	--	--	--
holding	Option (Right to Buy) F3	--	--	--

Holdings After Transaction: Class A Common Stock — 105,977 shares (Direct); Option (Right to Buy) — 15,341 contracts (Direct)

Footnotes (3)

1. F1. These Restricted Stock Units were granted to the Reporting Person on September 14, 2026 and vest on September 30, 2026.
2. F2. These Restricted Stock Units were granted to the Reporting Person on September 14, 2026 and vest on October 1, 2026.
3. F3. These options are fully vested and exercisable.

Key Figures

RSU award vesting September 30, 2026: 12,255 shares RSU award vesting October 1, 2026: 19,101 shares Total RSUs granted: 31,356 shares +4 more

7 metrics

RSU award vesting September 30, 2026 12,255 shares Restricted Stock Units granted September 14, 2026 to Kurt Busch

RSU award vesting October 1, 2026 19,101 shares Restricted Stock Units granted September 14, 2026 to Kurt Busch

Total RSUs granted 31,356 shares Sum of RSU awards reported for Kurt Busch on September 14, 2026

Option exercise price $41.80 per share Fully vested option for 2,000 MOBX underlying shares expiring August 10, 2030

Option underlying shares at $41.80 2,000 shares Underlying Class A Common Stock for the $41.80 option held by Kurt Busch

Option exercise price $68.40 per share Fully vested option for 13,341 MOBX underlying shares expiring April 4, 2032

Option underlying shares at $68.40 13,341 shares Underlying Class A Common Stock for the $68.40 option held by Kurt Busch

Key Terms

Restricted Stock Units, Option (Right to Buy, fully vested and exercisable

3 terms

Restricted Stock Units financial

"These Restricted Stock Units were granted to the Reporting Person"

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.

Option (Right to Buy financial

"Option (Right to Buy) underlying Class A Common Stock"

fully vested and exercisable financial

"These options are fully vested and exercisable"

FAQ

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

What insider transactions did MOBX director Kurt Busch report on September 14, 2026?

He reported two equity awards: 12,255 Restricted Stock Units (RSUs) vesting September 30, 2026 and 19,101 RSUs vesting October 1, 2026, both in MOBIX LABS, INC Class A Common Stock.

How many MOBX Restricted Stock Units did Kurt Busch receive in this Form 4 filing?

Kurt Busch received a total of 31,356 RSUs, consisting of 12,255 RSUs vesting on September 30, 2026 and 19,101 RSUs vesting on October 1, 2026, as awards of Class A Common Stock of MOBIX LABS, INC.

What stock options in MOBX does Kurt Busch hold according to this Form 4?

He holds fully vested options to buy 2,000 shares at $41.80 per share expiring August 10, 2030 and options to buy 13,341 shares at $68.40 per share expiring April 4, 2032, all for Class A Common Stock.

Were Kurt Busch’s MOBX stock options reported as fully vested?

Yes. A footnote states that the reported MOBIX LABS, INC options are fully vested and exercisable, covering 2,000 underlying shares at $41.80 and 13,341 underlying shares at $68.40 per share.

Was a Rule 10b5-1 trading plan involved in Kurt Busch’s MOBX Form 4?

No. The Form 4 indicates no Rule 10b5-1 plan was affirmatively associated with these reported transactions.

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

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Available on EDGAR 09/22/2026 - 06:24 PM Accepted by SEC EDGAR 09/22/2026 - 06:23 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^*

Busch Kurt

(Last) (First) (Middle)

C/O MOBIX LABS, INC.

1 VENTURE, SUITE 220

(Street)

IRVINE CALIFORNIA 92618

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
MOBIX LABS, INC [ MOBX ]

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)
09/14/2026

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
Class A Common Stock	09/14/2026		A		12,255(1)	A	$0.00	86,876	D
Class A Common Stock	09/14/2026		A		19,101(2)	A	$0.00	105,977	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
Option (Right to Buy)	$41.8							(3)	08/10/2030	Class A Common Stock	2,000		2,000	D
Option (Right to Buy)	$68.4							(3)	04/04/2032	Class A Common Stock	13,341		13,341	D

Explanation of Responses:

1. These Restricted Stock Units were granted to the Reporting Person on September 14, 2026 and vest on September 30, 2026.

2. These Restricted Stock Units were granted to the Reporting Person on September 14, 2026 and vest on October 1, 2026.

3. These options are fully vested and exercisable.

	/s/ Terri Aprati, Attorney-in-Fact	09/22/2026
	** 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)