---
title: Aeluma Insider Mark Tompkins Has Sold $21.4M in ALMU Stock While Retaining 1.79M Shares
type: news
slug: aeluma-tompkins-21-million-career-insider-sales-semiconductor-2026
canonical_url: https://13finsight.com/news/aeluma-tompkins-21-million-career-insider-sales-semiconductor-2026
published_at: 2026-03-02T01:27:06.384Z
updated_at: 2026-03-02T01:27:17.276Z
author: Alex Rivera
author_title: Breaking News Editor
author_url: https://13finsight.com/authors/alex-rivera
word_count: 217
locale: en
source: 13F Insight
---

# Aeluma Insider Mark Tompkins Has Sold $21.4M in ALMU Stock While Retaining 1.79M Shares

> Mark Tompkins, a major Aeluma insider, has sold $21.4M in ALMU stock across 155 transactions while maintaining a large 1.79M-share position worth $27M.

Mark Tompkins, a major insider at semiconductor company Aeluma (ALMU), has sold $21.4 million in stock across 155 transactions — but still holds 1.79 million shares. The Numbers MetricValue Career Sell Value$21.4M Career Buy Value$2.2M Total Transactions155 Last Transaction2026-02-02 Shares Remaining1,790,488 Recent Activity DateTypeSharesPriceEst. Value 2026-02-04Sell5,956$15.1200$90K 2026-02-04Sell28,544$14.6300$418K 2026-02-02Sell37,500$15.7400$590K 2026-01-30Sell908$16.7900$15K 2026-01-30Sell24,092$15.8800$383K Tompkins has been an active seller in early 2026, disposing of $2.0M in shares across six transactions in late January and early February at prices between $14.63 and $17.16. The sales appear systematic — consistent lot sizes across consecutive trading days. What It Means Unlike many insider sellers who exit entirely, Tompkins maintains a commanding 1.79M-share position worth approximately $27M at current prices. His $2.2M in career purchases alongside $21.4M in sales suggests he built his position primarily through grants and options. The 10:1 sell-to-buy ratio is moderate by insider standards. Aeluma operates in the compound semiconductor space, targeting applications in lidar, 3D sensing, and defense. As a small-cap company, ALMU is more sensitive to insider trading signals. Tompkins' pattern of selling while retaining a large position suggests portfolio diversification rather than a bearish outlook. What to Watch ALMU revenue growth from lidar and defense contracts Whether Tompkins' selling pace increases at higher prices Institutional interest in upcoming 13F filings Aeluma product adoption in autonomous vehicle programs

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Source: 13F Insight — https://13finsight.com/news/aeluma-tompkins-21-million-career-insider-sales-semiconductor-2026
Author: Alex Rivera — https://13finsight.com/authors/alex-rivera
Last updated: 2026-03-02T01:27:17.276Z