Steven DenBaars - 19 May 2026 Form 4 Insider Report for Aeluma, Inc. (ALMU)

Reporting relationship: Director
Issuer ticker: ALMU
Reported as of: 19 May 2026
Net transaction value: -$505,630
SEC form: 4
Accepted by SEC: 21 May 2026, 19:20:42 UTC
Prior SEC filing: 20 Apr 2026
Source filing: View source filing
Reporting owner signature: /s/ Joshua L. Colburn, Attorney-in-Fact

Key filing fact

Steven DenBaars filed Form 4 for Aeluma, Inc. (ALMU) on 21 May 2026.

Key facts

This page summarizes Steven DenBaars's Form 4 filing for Aeluma, Inc. (ALMU).
4 reported transactions and 0 derivative rows are listed below.
Accepted by SEC: 21 May 2026, 19:20.

Change

Previous filing in this sequence was filed on 20 Apr 2026.
Current net transaction value: -$505,630.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001700533 Primary reporting owner

Denbaars Steven

Relationship: Director
Address: 27 CASTILIAN DRIVE, GOLETA
Signature: /s/ Joshua L. Colburn, Attorney-in-Fact
Signature date: 21 May 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

ALMU transaction

Common Stock

Sale

Transaction value: $145,026
Shares: -7,415
Change %: -1.9%
Price: $19.56
Shares after: 387,794
Date: 19 May 2026
Ownership: Direct
Footnotes: F1, F2, F3

ALMU transaction

Common Stock

Sale

Transaction value: $104,807
Shares: -5,085
Change %: -1.3%
Price: $20.61
Shares after: 382,709
Date: 19 May 2026
Ownership: Direct
Footnotes: F1, F4

ALMU transaction

Common Stock

Sale

Transaction value: $235,734
Shares: -11,558
Change %: -3%
Price: $20.40
Shares after: 371,151
Date: 20 May 2026
Ownership: Direct
Footnotes: F1, F5

ALMU transaction

Common Stock

Sale

Transaction value: $20,064
Shares: -942
Change %: -0.25%
Price: $21.30
Shares after: 370,209
Date: 20 May 2026
Ownership: Direct
Footnotes: F1, F6

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Rule 10b5-1 trading plan

These transactions were reported as open-market trades under a Rule 10b5-1 plan. The plan lets an insider set trading instructions in advance, which can reduce the risk of trading while in possession of material nonpublic information.

Original filing language: transaction made pursuant to a contract, instruction, or written plan intended to satisfy Rule 10b5-1(c).

Explanation of responses 6 footnotes

Footnote F1

Sales effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 20, 2025.

Footnote F2

Restricted stock units scheduled to vest with respect to approximately 1/12 of the shares on December 31, 2025, 1/4 of the shares on March 31, June 30, and September 30, 2026, and 1/6 of the shares on November 30, 2026.

Footnote F3

The price reported in Column 4 represents a weighted average sales price. These shares were sold in multiple transactions at prices ranging from $19.02 to $20.01, inclusive.

Footnote F4

The price reported in Column 4 represents a weighted average sales price. These shares were sold in multiple transactions at prices ranging from $20.0244 to $20.9963, inclusive.

Footnote F5

The price reported in Column 4 represents a weighted average sales price. These shares were sold in multiple transactions at prices ranging from $19.89 to $20.8895, inclusive.

Footnote F6

The price reported in Column 4 represents a weighted average sales price. These shares were sold in multiple transactions at prices ranging from $20.907 to $21.63, inclusive.