ALMU insider Form 4: sales at $16–$18; 2.32M shares held

Rhea-AI Filing Summary

Aeluma (ALMU) insider activity: A reporting person disclosed open-market sales of common stock. On 10/17/2025, sales totaled 33,344 shares at a weighted average price of $16.75, 5,913 shares at $17.77, and 743 shares at $18.45. On 10/20/2025, an additional 37,500 shares were sold at $16.39. The prices reflect weighted averages across multiple trades within disclosed ranges.

Following these transactions, the reporting person beneficially owned 2,319,988 shares, held directly. The filer is identified as a Director.

Insider Trade Summary

Net Seller: 77,500 shares ($1,291,919)

Net Sell 4 txns

Insider Tompkins Mark N.

Role 10% Owner

Sold 77,500 shs ($1.29M)

Type	Security	Shares	Price	Value
Sale	Common Stock	37,500	$16.39	$615K
Sale	Common Stock	33,344	$16.75	$559K
Sale	Common Stock	5,913	$17.77	$105K
Sale	Common Stock	743	$18.45	$14K

Holdings After Transaction: Common Stock — 2,319,988 shares (Direct)

Footnotes (1)

1. The price reported in Column 4 represents a weighted average sales price. These shares were sold in multiple transactions at prices ranging from $16.32 to $17.31, inclusive. The price reported in Column 4 represents a weighted average sales price. These shares were sold in multiple transactions at prices ranging from $17.32 to $18.31, inclusive. The price reported in Column 4 represents a weighted average sales price. These shares were sold in multiple transactions at prices ranging from $18.34 to $18.55, inclusive. The price reported in Column 4 represents a weighted average sales price. These shares were sold in multiple transactions at prices ranging from $17.00 to $16.00, inclusive.

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).

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^*

Tompkins Mark N.

(Last) (First) (Middle)

APP. 1, VIA GUIDINO 23

(Street)

LUGANO-PARADISO V8 6900

(City) (State) (Zip)

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

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director	X	10% Owner
	Officer (give title below)		Other (specify below)

3. Date of Earliest Transaction (Month/Day/Year)
10/17/2025

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

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	10/17/2025		S		33,344	D	$16.75(1)	2,364,144	D
Common Stock	10/17/2025		S		5,913	D	$17.77(2)	2,358,231	D
Common Stock	10/17/2025		S		743	D	$18.45(3)	2,357,488	D
Common Stock	10/20/2025		S		37,500	D	$16.39(4)	2,319,988	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. The price reported in Column 4 represents a weighted average sales price. These shares were sold in multiple transactions at prices ranging from $16.32 to $17.31, inclusive.

2. The price reported in Column 4 represents a weighted average sales price. These shares were sold in multiple transactions at prices ranging from $17.32 to $18.31, inclusive.

3. The price reported in Column 4 represents a weighted average sales price. These shares were sold in multiple transactions at prices ranging from $18.34 to $18.55, inclusive.

4. The price reported in Column 4 represents a weighted average sales price. These shares were sold in multiple transactions at prices ranging from $17.00 to $16.00, inclusive.

Remarks:

The reporting person undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in the footnotes above.

	/s/ Mark N. Tompkins	10/21/2025
	** 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.

FAQ

What insider transactions did Aeluma (ALMU) report?

Sales of common stock on 10/17/2025 and 10/20/2025, including 33,344, 5,913, 743, and 37,500 shares at weighted average prices.

What were the weighted average sale prices disclosed?

Weighted averages were $16.75, $17.77, $18.45 (all on 10/17/2025), and $16.39 (on 10/20/2025).

How many Aeluma shares does the reporting person hold after the sales?

Beneficial ownership after the reported transactions is 2,319,988 shares, held directly.

What is the reporting person’s relationship to Aeluma?

The filer is identified as a Director.

Were the prices single trades or averages?

They are weighted average prices across multiple trades within specified price ranges, as disclosed in the footnotes.

What are the disclosed price ranges for the sales?

Ranges include $16.32–$17.31, $17.32–$18.31, $18.34–$18.55 (10/17/2025) and $17.00–$16.00 (10/20/2025).