Aeluma (NASDAQ: ALMU) CEO sells 20K shares and gifts 40K

Filing Impact

(Very High)

Filing Sentiment

(Negative)

Form Type

Rhea-AI Filing Summary

Aeluma, Inc. Chief Executive Officer Jonathan Klamkin reported multiple insider transactions in the company’s common stock. On June 1, 2026, he sold a total of 20,000 shares in open-market transactions under a pre-arranged Rule 10b5-1 trading plan adopted on December 3, 2025.

The sales were executed in several tranches at weighted average prices of $22.19, $23.32, $24.39, $25.12 and $26.25 per share. He also made bona fide gifts totaling 40,000 shares, including 20,000 shares from his direct holdings and 20,000 shares from an indirect position held by a family trust.

Following these transactions, Klamkin directly holds 22,403 shares of Aeluma common stock and indirectly holds 1,366,995 shares through a family trust.

Insider Trade Summary 10b5-1

Net Seller: 20,000 shares ($500,661)

Net Sell 7 txns

Insider Klamkin Jonathan

Role Chief Executive Officer

Sold 20,000 shs ($501K)

Type	Security	Shares	Price	Value
Gift	Common Stock	20,000	$0.00	--
Gift	Common Stock	20,000	$0.00	--
Sale	Common Stock	900	$22.1867	$20K
Sale	Common Stock	1,400	$23.321	$33K
Sale	Common Stock	7,900	$24.3851	$193K
Sale	Common Stock	1,600	$25.1185	$40K
Sale	Common Stock	8,200	$26.2453	$215K

Holdings After Transaction: Common Stock — 1,366,995 shares (Indirect, By Family Trust); Common Stock — 22,403 shares (Direct, null)

Footnotes (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 900 shares of common stock of Aeluma, Inc. sold by the reporting person in multiple transactions on June 1, 2026 with sale prices ranging from $21.64 to $22.62 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. Reflects the weighted average price of 1,400 shares of common stock of Aeluma, Inc. sold by the reporting person in multiple transactions on June 1, 2026 with sale prices ranging from $22.74 to $23.70 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. Reflects the weighted average price of 7,900 shares of common stock of Aeluma, Inc. sold by the reporting person in multiple transactions on June 1, 2026 with sale prices ranging from $23.75 to $24.74 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. Reflects the weighted average price of 1,600 shares of common stock of Aeluma, Inc. sold by the reporting person in multiple transactions on June 1, 2026 with sale prices ranging from $24.76 to $25.73 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. Reflects the weighted average price of 8,200 shares of common stock of Aeluma, Inc. sold by the reporting person in multiple transactions on June 1, 2026 with sale prices ranging from $25.79 to $26.71 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 prices: $22.19, $23.32, $24.39, $25.12, $26.25 per share Shares gifted: 40,000 shares +3 more

6 metrics

Shares sold 20,000 shares Total common stock sold in open-market transactions on June 1, 2026

Weighted average sale prices $22.19, $23.32, $24.39, $25.12, $26.25 per share Prices for separate sale tranches on June 1, 2026

Shares gifted 40,000 shares Total bona fide gifts of common stock on June 1, 2026

Direct holdings after transactions 22,403 shares Aeluma common stock directly held by CEO after June 1, 2026

Indirect holdings after transactions 1,366,995 shares Common stock indirectly held via family trust after June 1, 2026

Rule 10b5-1 plan adoption date December 3, 2025 Date CEO’s trading plan governing the June 1, 2026 sales was adopted

Key Terms

Rule 10b5-1 trading plan, bona fide gift, weighted average price, family trust, +1 more

5 terms

Rule 10b5-1 trading plan regulatory

"Sales effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 3, 2025."

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.

bona fide gift regulatory

"transaction_code_description: "Bona fide gift" for the 20,000-share gift transfers."

A bona fide gift is a genuine, voluntary transfer of money, property, or benefits from one party to another made without expectation of repayment, services, or hidden conditions. Investors care because such gifts can affect company disclosures, related‑party transaction rules, tax treatment, and perceived conflicts of interest; think of it like someone giving you a present with no strings attached — but on a corporate scale, auditors and regulators need to verify it really is unconditional.

weighted average price financial

"Reflects the weighted average price of 900 shares of common stock of Aeluma, Inc. sold by the reporting person in multiple transactions..."

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.

family trust financial

"nature_of_ownership: "By Family Trust" for the indirect 20,000-share gift transaction."

open-market sale financial

"transaction_action: "open-market sale" for the non-derivative sales of common stock."

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.

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Form 4 Insider Transactions: What Each Field Means →

06/03/2026 - 05:09 PM

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^*

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)
06/01/2026

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)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Stock	06/01/2026		G		20,000	D	$0	1,366,995	I	By Family Trust
Common Stock	06/01/2026		G		20,000	A	$0	22,403	D
Common Stock	06/01/2026		S⁽¹⁾		900	D	$22.1867⁽²⁾	21,503	D
Common Stock	06/01/2026		S⁽¹⁾		1,400	D	$23.321⁽³⁾	20,103	D
Common Stock	06/01/2026		S⁽¹⁾		7,900	D	$24.3851⁽⁴⁾	12,203	D
Common Stock	06/01/2026		S⁽¹⁾		1,600	D	$25.1185⁽⁵⁾	10,603	D
Common Stock	06/01/2026		S⁽¹⁾		8,200	D	$26.2453⁽⁶⁾	2,403	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)
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)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)

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 900 shares of common stock of Aeluma, Inc. sold by the reporting person in multiple transactions on June 1, 2026 with sale prices ranging from $21.64 to $22.62 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.

3. Reflects the weighted average price of 1,400 shares of common stock of Aeluma, Inc. sold by the reporting person in multiple transactions on June 1, 2026 with sale prices ranging from $22.74 to $23.70 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.

4. Reflects the weighted average price of 7,900 shares of common stock of Aeluma, Inc. sold by the reporting person in multiple transactions on June 1, 2026 with sale prices ranging from $23.75 to $24.74 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.

5. Reflects the weighted average price of 1,600 shares of common stock of Aeluma, Inc. sold by the reporting person in multiple transactions on June 1, 2026 with sale prices ranging from $24.76 to $25.73 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.

6. Reflects the weighted average price of 8,200 shares of common stock of Aeluma, Inc. sold by the reporting person in multiple transactions on June 1, 2026 with sale prices ranging from $25.79 to $26.71 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	06/03/2026
	** 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)

Source: View Original Filing on SEC EDGAR

FAQ

What insider transactions did Aeluma (ALMU) CEO Jonathan Klamkin report?

Aeluma CEO Jonathan Klamkin reported selling 20,000 common shares and making bona fide gifts of 40,000 shares. The activity occurred on June 1, 2026 and included both direct holdings and shares held indirectly through a family trust.

Were Aeluma (ALMU) CEO Jonathan Klamkin’s stock sales pre-planned?

Yes. The 20,000 Aeluma common shares sold by CEO Jonathan Klamkin were effected under a Rule 10b5-1 trading plan. That plan was adopted on December 3, 2025, indicating the sales were scheduled in advance rather than timed discretionarily.

At what prices did the Aeluma (ALMU) CEO sell his shares?

Jonathan Klamkin’s 20,000 sold shares were executed in tranches at weighted average prices of $22.19, $23.32, $24.39, $25.12 and $26.25 per share. Each tranche reflected multiple trades within a defined intraday price range.

How many Aeluma (ALMU) shares did the CEO gift on June 1, 2026?

On June 1, 2026, CEO Jonathan Klamkin made bona fide gifts totaling 40,000 Aeluma common shares. This included 20,000 shares from his direct holdings and 20,000 shares from an indirect position held through a family trust.

What are Jonathan Klamkin’s Aeluma (ALMU) holdings after these transactions?

After the reported June 1, 2026 transactions, Jonathan Klamkin directly holds 22,403 Aeluma common shares. He also indirectly holds 1,366,995 additional shares through a family trust, as reflected in the Form 4 ownership figures.

Do the Aeluma (ALMU) insider gifts involve open-market sales?

No. The 40,000 Aeluma shares reported as gifts by CEO Jonathan Klamkin are classified as bona fide gifts. These transfers do not involve sale proceeds and are distinct from his 20,000-share open-market sales executed the same day.