Aeluma (ALMU) CEO sells 20,000 shares under Rule 10b5-1 trading plan

Rhea-AI Filing Summary

Aeluma, Inc. Chief Executive Officer Jonathan Klamkin sold 20,000 shares of common stock in an open-market transaction on April 1, 2026. The shares were sold at a weighted average price of $13.0975 per share, with individual sale prices ranging from $12.82 to $13.325 per share.

The sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 3, 2025. Following these transactions, Klamkin directly holds 1,409,398 shares of Aeluma common stock.

Insights

Equity compensation and insider-trading analyst

Aeluma’s CEO made a pre-planned open-market sale of 20,000 shares.

Aeluma, Inc. CEO Jonathan Klamkin executed an open-market sale of 20,000 common shares at a weighted average of $13.0975 on April 1, 2026. The sale prices ranged from $12.82 to $13.325 per share.

The filing states the sales occurred under a Rule 10b5-1 trading plan adopted on December 3, 2025, indicating the transactions were pre-arranged rather than timed discretionarily. After the sale, Klamkin directly holds 1,409,398 shares, showing a substantial remaining equity position.

Insider Trade Summary 10b5-1

Net Seller: 20,000 shares ($261,950)

Net Sell 1 txn

Insider Klamkin Jonathan

Role Chief Executive Officer

Sold 20,000 shs ($262K)

Type	Security	Shares	Price	Value
Sale	Common Stock	20,000	$13.0975	$262K

Holdings After Transaction: Common Stock — 1,409,398 shares (Direct)

Footnotes (1)

1. Sales effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 3, 2025. Reflects the weighted average price of 20,000 shares of common stock of Aeluma, Inc. sold by the reporting person in multiple transactions on April 1, 2026 with sale prices ranging from $12.82 to $13.325 per share. The reporting person undertakes to provide upon request by the U.S. Securities and Exchange Commission staff, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price.

Key Figures

Shares sold: 20,000 shares Weighted average sale price: $13.0975 per share Post-transaction holdings: 1,409,398 shares +2 more

5 metrics

Shares sold 20,000 shares Open-market sale on April 1, 2026

Weighted average sale price $13.0975 per share April 1, 2026 transactions

Post-transaction holdings 1,409,398 shares Shares directly held after sale

Sale price range $12.82–$13.325 per share Range for 20,000 shares sold April 1, 2026

10b5-1 plan adoption date December 3, 2025 Date CEO adopted trading plan

Key Terms

Rule 10b5-1 trading plan, weighted average price, open-market sale

3 terms

Rule 10b5-1 trading plan regulatory

"Sales effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person"

A Rule 10b5-1 trading plan is a pre-arranged schedule that allows company insiders to buy or sell stock at specific times, even if they have inside information. It helps prevent accusations of unfair trading by making these transactions look planned and transparent, rather than sneaky or illegal.

weighted average price financial

"Reflects the weighted average price of 20,000 shares of common stock"

Weighted average price is the average price of a security where each trade or component is counted according to its size, so bigger trades pull the average more than smaller ones. Think of it like calculating the average cost of a grocery haul where items you bought more of have greater influence on the final per-item cost. Investors use it to understand the true average price paid or received, judge execution quality, and compare trading performance against market movement.

open-market sale financial

"transaction_action": "open-market sale""

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

Form 4 Insider Transactions: What Each Field Means →

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^*

Klamkin Jonathan

(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
X	Officer (give title below)		Other (specify below)
	Chief Executive Officer

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
04/01/2026

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	04/01/2026		S(1)		20,000	D	$13.0975(2)	1,409,398	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. Sales effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 3, 2025.

2. Reflects the weighted average price of 20,000 shares of common stock of Aeluma, Inc. sold by the reporting person in multiple transactions on April 1, 2026 with sale prices ranging from $12.82 to $13.325 per share. The reporting person undertakes to provide upon request by the U.S. Securities and Exchange Commission staff, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price.

	/s/ Joshua L. Colburn, Attorney-in-Fact	04/03/2026
	** 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)

FAQ

What insider transaction did Aeluma (ALMU) report for its CEO?

Aeluma reported that CEO Jonathan Klamkin sold 20,000 shares of common stock in an open-market transaction on April 1, 2026. The filing shows this was a planned sale under a Rule 10b5-1 trading plan adopted in December 2025.

At what price did the Aeluma (ALMU) CEO sell his 20,000 shares?

The CEO’s 20,000 shares were sold at a weighted average price of $13.0975 per share. Individual sale prices on April 1, 2026 ranged from $12.82 to $13.325 per share, according to the Form 4 footnote disclosure.

How many Aeluma (ALMU) shares does the CEO hold after this sale?

Following the reported sale, CEO Jonathan Klamkin directly holds 1,409,398 shares of Aeluma common stock. This post-transaction balance is disclosed in the Form 4 as the total shares beneficially owned after the April 1, 2026 transaction.

Was the Aeluma (ALMU) CEO’s stock sale made under a Rule 10b5-1 plan?

Yes. The Form 4 states that the sales were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 3, 2025. This indicates the sale followed a pre-established trading arrangement.

What does the price range in the Aeluma (ALMU) CEO’s sale represent?

The filing explains that the weighted average price reflects multiple trades totaling 20,000 shares. On April 1, 2026, individual sale prices ranged from $12.82 to $13.325 per share, and detailed trade-level information is available upon request.