Aeluma director exercises 25,000 stock options

The exercise added 25,000 common shares to the director’s reported position, which stood at 38,343 shares afterward.

Rhea-AI Filing Summary

Aeluma, Inc. director Byron Michael exercised 25,000 fully vested stock options on September 21, 2026, at an exercise price of $5.93 per share, acquiring 25,000 common shares. After the transaction, his reported holdings were 38,343 common shares and 20,833 stock options. No Rule 10b5-1 plan is reported.

Insider Trade Summary

25,000 shares exercised/converted

Exercise 2 txns

Insider Byron Michael

Role Director

Type	Security	Shares	Price	Value
Exercise	Stock Option (right to buy) F1	25,000	$0.00	$0.00
Exercise	Common Stock	25,000	$5.93	$148K

Holdings After Transaction: Stock Option (right to buy) — 20,833 contracts (Direct); Common Stock — 38,343 shares (Direct)

Footnotes (1)

1. F1. Fully vested.

Key Figures

Stock options exercised: 25,000 options Exercise price: $5.93 per share Common shares acquired: 25,000 shares +3 more

6 metrics

Stock options exercised 25,000 options September 21, 2026

Exercise price $5.93 per share Options exercised on September 21, 2026

Common shares acquired 25,000 shares September 21, 2026

Common shares after transaction 38,343 shares Reported following the September 21, 2026 transaction

Stock options after transaction 20,833 options Reported following the September 21, 2026 transaction

Option expiration date February 28, 2035 Expiration date reported for the option

Key Terms

Fully vested, Stock Option (right to buy), exercise price, derivative security

4 terms

Fully vested financial

"Fully vested."

Stock Option (right to buy) financial

"Stock Option (right to buy)"

exercise price financial

"exercise price of $5.9300"

The exercise price is the fixed amount at which you can buy or sell an asset, like a stock, when using an options contract. It matters because it helps determine whether exercising the option will be profitable or not, depending on the current market price. Think of it as the set price you agree on today to buy or sell later.

derivative security financial

"Exercise or conversion of derivative security"

A derivative security is a financial contract whose value comes from the price or performance of something else, such as a stock, bond, commodity, or market index. For investors it acts like an insurance policy or a wager: it can be used to protect against losses, lock in prices, or amplify gains and losses, so it can change a portfolio’s risk and potential return without owning the underlying asset directly.

FAQ

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

How many ALMU shares did director Byron Michael acquire?

Byron Michael acquired 25,000 Aeluma common shares on September 21, 2026, through an exercise of fully vested stock options.

What were Byron Michael’s reported ALMU holdings after the option exercise?

After the September 21, 2026 transaction, his reported holdings were 38,343 common shares and 20,833 stock options.

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

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Available on EDGAR 09/23/2026 - 04:54 PM Accepted by SEC EDGAR 09/23/2026 - 04:54 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^*

Byron Michael

(Last) (First) (Middle)

27 CASTILIAN DRIVE

(Street)

GOLETA CALIFORNIA 93117

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
Aeluma, Inc. [ ALMU ]

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)
09/21/2026

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	09/21/2026		M		25,000	A	$5.93	38,343	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
Stock Option (right to buy)	$5.93	09/21/2026		M			25,000	(1)	02/28/2035	Common Stock	25,000	$0	20,833	D

Explanation of Responses:

1. Fully vested.

	/s/ Joshua L. Colburn, Attorney-in-Fact	09/23/2026
	** 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)