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Who

Mark N. Tompkins

Other role

Company insider

Files Form 4 as: Other, Matternet; 10% owner and Other, Aeluma; Director and 10% owner and Other, Deep Fission; Director and 10% owner, Orielle Acquisition; Director and 10% owner and Other, Deep Isolation Nuclear; Other, Lomond Therapeutics Holdings; Other, Serve Robotics; Other, Guerrilla RF.

Every Form 4 they filed

In numbers

Trades disclosed
181
Buys
8
Sells
94
Bought
$2.2M
Sold
$28.0M
Companies
15
Companies where not an officer
15
First trade
15 Jun 2017
Last trade
22 May 2026
Last filed
27 May 2026

Companies traded

Everywhere else they filed: board seats, 10% stakes, other companies
MatternetOther · last 22 May 20260 buys · 0 sells
ALMU Aeluma10% owner, Other · Semiconductors · last 4 Feb 20263 buys · 35 sells
FISN Deep FissionDirector, 10% owner, Other · Electric Utilities & IPPs · last 5 Sep 20250 buys · 1 sell
Orielle AcquisitionDirector, 10% owner · last 26 Aug 20250 buys · 1 sell
Deep Isolation NuclearDirector, 10% owner, Other · last 23 Jul 20250 buys · 1 sell
Lomond Therapeutics HoldingsOther · last 1 Nov 20240 buys · 0 sells
SERV Serve RoboticsOther · Machinery · last 31 Jul 20230 buys · 0 sells
Guerrilla RFOther · last 12 Nov 20211 buy · 0 sells
AMST Amesite10% owner · Software · last 1 Jun 20211 buy · 40 sells
SMTK SmartKemOther · Semiconductors · last 23 Feb 20210 buys · 0 sells
AugmedixOther · last 5 Oct 20200 buys · 0 sells
Peninsula AcquisitionOther · last 12 Feb 20201 buy · 0 sells

Activity over time

1 Nov 2024 – 1 Oct 2026
110Nov 24May 25Nov 25Apr 26Oct 26

Buys above the line, sells below, each month.

Every trade

TradedCompanyWhatAmount
22 May 2026filed 27 May 2026MatternetSEC FORM 4 Code J—5,125,000 at $0.00filing
4 Feb 2026filed 5 Feb 2026ALMU AelumaSemiconductorsSEC FORM 4 Sold$418K28,544 at $14.63filing
4 Feb 2026filed 5 Feb 2026ALMU AelumaSemiconductorsSEC FORM 4 Sold$90K5,956 at $15.12filing
4 Feb 2026filed 5 Feb 2026ALMU AelumaSemiconductorsSEC FORM 4 Sold$418K28,544 at $14.63filing
4 Feb 2026filed 5 Feb 2026ALMU AelumaSemiconductorsSEC FORM 4 Sold$90K5,956 at $15.12filing
2 Feb 2026filed 2 Feb 2026ALMU AelumaSemiconductorsSEC FORM 4 Sold$590K37,500 at $15.74filing
2 Feb 2026filed 2 Feb 2026ALMU AelumaSemiconductorsSEC FORM 4 Sold$590K37,500 at $15.74filing
30 Jan 2026filed 2 Feb 2026ALMU AelumaSemiconductorsSEC FORM 4 Sold$383K24,092 at $15.88filing
30 Jan 2026filed 2 Feb 2026ALMU AelumaSemiconductorsSEC FORM 4 Sold$15K908 at $16.79filing
30 Jan 2026filed 2 Feb 2026ALMU AelumaSemiconductorsSEC FORM 4 Sold$383K24,092 at $15.88filing
30 Jan 2026filed 2 Feb 2026ALMU AelumaSemiconductorsSEC FORM 4 Sold$15K908 at $16.79filing
29 Jan 2026filed 2 Feb 2026ALMU AelumaSemiconductorsSEC FORM 4 Sold$457K27,297 at $16.75filing
29 Jan 2026filed 2 Feb 2026ALMU AelumaSemiconductorsSEC FORM 4 Sold$89K5,203 at $17.16filing
29 Jan 2026filed 2 Feb 2026ALMU AelumaSemiconductorsSEC FORM 4 Sold$457K27,297 at $16.75filing
29 Jan 2026filed 2 Feb 2026ALMU AelumaSemiconductorsSEC FORM 4 Sold$89K5,203 at $17.16filing
22 Jan 2026filed 22 Jan 2026ALMU AelumaSemiconductorsSEC FORM 4 Sold$524K29,038 at $18.05filing
22 Jan 2026filed 22 Jan 2026ALMU AelumaSemiconductorsSEC FORM 4 Sold$18K962 at $18.81filing
22 Jan 2026filed 22 Jan 2026ALMU AelumaSemiconductorsSEC FORM 4 Sold$524K29,038 at $18.05filing
22 Jan 2026filed 22 Jan 2026ALMU AelumaSemiconductorsSEC FORM 4 Sold$18K962 at $18.81filing
21 Jan 2026filed 22 Jan 2026ALMU AelumaSemiconductorsSEC FORM 4 Sold$562K30,328 at $18.52filing

News

Aeluma (NASDAQ:ALMU) CEO Sells $1,053,000.00 in StockALMU · dailypolitical.com · 17 Oct 2026Aeluma (NASDAQ:ALMU) vs. Photronics (NASDAQ:PLAB) Critical AnalysisALMU · dailypolitical.com · 13 Oct 2026

0 headlines in the last 90 days name Mark N. Tompkins; 2 articles from the last 14 days about the 1 company they traded most, at most three about any one of them.

Sectors

Technology79
Health Care2
Utilities1
Not placed20

Buys in green, sells in red, by the company’s sector.

Related people

Jonathan KlamkinChief Executive Officer · Chief Executive Officer at Aeluma, filing Form 4 there in the last year
Christopher P. StewartChief Financial Officer · Chief Financial Officer at Aeluma, filing Form 4 there in the last year
Michael ByronDirector · Director at Aeluma, filing Form 4 there in the last year
Steven DenbaarsDirector · Director at Aeluma, filing Form 4 there in the last year
Laurence MartonDirector · Director at Matternet, filing Form 4 there in the last year