Form 4: Aeluma 10% Owner Sells 65,000 Shares Under 10b5-1 Plan

Mark N. Tompkins, a Director and 10% owner of Aeluma, Inc., reported the sale of 65,000 shares of common stock over two days in October 2025.

Summary

• Mark N. Tompkins, a Director and 10% owner of Aeluma, Inc. (ALMU), sold a total of 65,000 shares of common stock.
• The sales occurred on October 15, 2025, and October 16, 2025.
• Transactions were executed under a Rule 10b5-1(c) trading plan, indicating pre-planned sales.
• The shares were sold at weighted average prices ranging from $18.97 to $21.31 per share.
• Following these transactions, Tompkins beneficially owns 2,397,488 shares of Aeluma, Inc. common stock.

Sentiment

Score: 4

Explanation: The sale of 65,000 shares by a Director and 10% owner is a notable event. While executed under a 10b5-1 plan, which mitigates some negative perception, it still represents a reduction in insider holdings and could be viewed with caution by the market.

Positives

• The sales were made pursuant to a Rule 10b5-1(c) plan, indicating pre-planned transactions rather than opportunistic selling based on new, non-public information.

Negatives

• A Director and 10% owner selling a significant number of shares (65,000) could be perceived negatively by the market, potentially signaling a lack of confidence or a need for liquidity.
• The sales occurred over multiple transactions with varying prices, indicating a systematic reduction in holdings.

Risks

• Increased selling pressure on Aeluma, Inc. stock due to a large insider sale.
• Potential negative investor sentiment if the market interprets the sale as a lack of confidence from a significant owner.

Management Comments

• 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.

Industry Context

Insider selling, even under a 10b5-1 plan, is a common occurrence in the market. While it can sometimes signal a lack of confidence, it often relates to personal financial planning, diversification, or liquidity needs, especially for long-term holders or founders. The market typically scrutinizes such sales, particularly from significant owners like a 10% owner and director.

Stakeholder Impact

• Shareholders: May interpret the sale as a negative signal, potentially leading to decreased confidence and selling pressure on the stock.

Next Steps

• The reporting person will provide full information regarding the number of shares sold at each separate price within the reported ranges upon request.

Key Dates

Recommendation

While the sale by a Director and 10% owner is a significant event, the fact that it was executed under a Rule 10b5-1 plan suggests it was pre-scheduled and not based on new, adverse material non-public information. This mitigates the immediate negative implications. However, it still represents a reduction in insider ownership, which warrants caution. Investors should hold and monitor future insider activity and company performance rather than making an immediate 'sell' decision based solely on this filing.

Keywords

Aeluma Inc, ALMU, Insider Trading, Form 4, Stock Sale, Mark N. Tompkins, Director, 10% Owner, Equity Transaction, SEC Filing, 10b5-1 Plan