Tompkins Mark N. — Insider Trades & Holdings | InsiderBid

Tompkins Mark N.

Form 4 filings across 5 companies. Net figures count open-market buys and sales only. EDGAR profile ↗

Lifetime net: -$18M

Positions by company

Reported holding is the most recent post-transaction share count on a Table I row.

Every company this insider has reported trading in, with the value bought and sold at each and the date they last traded.
Ticker	Company	Bought	Sold	Net	Shares held	Last trade
—	Matternet, Inc.	$0	$0	$0	2.4M	May 22
ALMU	Aeluma, Inc.	$0	$18M	-$18M	1.8M	Feb 4
—	Surfside Acquisition Inc.	$0	$3	-$3	1.9M	Sep 5, 2025
—	Orielle Acquisition Corp.	$0	$5	-$5	4.7M	Aug 26, 2025
DBHL	Deep Isolation Nuclear, Inc.	$0	$3	-$3	1.9M	Jul 23, 2025

—

Matternet, Inc.

$0

Bought

$0

Sold

$0

Held

2.4M

Aeluma, Inc.

-$18M

Bought

$0

Sold

$18M

Held

1.8M

—

Surfside Acquisition Inc.

-$3

Bought

$0

Sold

$3

Held

1.9M

—

Orielle Acquisition Corp.

-$5

Bought

$0

Filing record

How quickly this filer reports. Section 16 allows two business days from the transaction.

All 18 filings we hold were filed within the two-business-day deadline.

Counted in business days from the transaction date, or the deemed execution date where the filing reports one, excluding weekends and federal holidays. How this is measured · All late filings

Trade history

The 65 most recent Form 4 transactions.

Insider transactions, newest first: date, security, transaction type, size and a link to the filing each row came from.
Date	Ticker	Company	Type	Shares	Price	Value	Δ Own	Filing
May 22	—	Matternet, Inc.	JOTHER	5.1M	—	—	-68.3%	Open the original filing on SEC.gov
Feb 4	ALMU	Aeluma, Inc.	SSELL	5,956	$15.12	$90.1K	-0.3%	Open the original filing on SEC.gov
Feb 4

—JOTHER—

Matternet, Inc.May 22

5.1M sh · -68.3% own

ALMUSSELL$90.1K

Aeluma, Inc.Feb 4

5,956 sh @ $15.12 · -0.3% own

ALMUSSELL$417.6K

Aeluma, Inc.Feb 4

28,544 sh @ $14.63 · -1.6% own

ALMUSSELL$590.3K

Aeluma, Inc.Feb 2

37,500 sh @ $15.74 · -2.0% own

ALMUSSELL$15.2K

Aeluma, Inc.Jan 30

908 sh @ $16.79 · <0.1% own

ALMUSSELL$382.6K

Aeluma, Inc.Jan 30

24,092 sh @ $15.88 · -1.3% own

ALMUSSELL$89.3K

Aeluma, Inc.Jan 29

5,203 sh @ $17.16 · -0.3% own

ALMUSSELL$457.2K

Aeluma, Inc.Jan 29

27,297 sh @ $16.75 · -1.4% own

ALMUSSELL$18.1K

Aeluma, Inc.Jan 22

962 sh @ $18.81 · <0.1% own

ALMUSSELL$524.1K

Aeluma, Inc.Jan 22

29,038 sh @ $18.05 · -1.5% own

ALMUSSELL$212

Aeluma, Inc.Jan 21

10 sh @ $21.24 · 0.0% own

ALMUSSELL$35.1K

Aeluma, Inc.Jan 21

1,715 sh @ $20.44 · <0.1% own

ALMUSSELL$249.9K

Aeluma, Inc.Jan 21

12,947 sh @ $19.30 · -0.7% own

ALMUSSELL$561.7K

Aeluma, Inc.Jan 21

30,328 sh @ $18.52 · -1.5% own

ALMUSSELL$19.2K

Aeluma, Inc.Jan 20

888 sh @ $21.58 · <0.1% own

ALMUSSELL$601.5K

Aeluma, Inc.Jan 20

29,112 sh @ $20.66 · -1.4% own

ALMUSSELL$49K

Aeluma, Inc.Dec 26, 2025

2,662 sh @ $18.39 · -0.1% own

ALMUSSELL$366.8K

Aeluma, Inc.Dec 26, 2025

20,368 sh @ $18.01 · -1.0% own

ALMUSSELL$117.9K

Aeluma, Inc.Dec 26, 2025

6,970 sh @ $16.91 · -0.3% own

ALMUSSELL$240.8K

Aeluma, Inc.Dec 24, 2025

15,000 sh @ $16.05 · -0.7% own

ALMUSSELL$223.1K

Aeluma, Inc.Dec 23, 2025

15,000 sh @ $14.87 · -0.7% own

ALMUSSELL$519.1K

Aeluma, Inc.Dec 22, 2025

35,000 sh @ $14.83 · -1.7% own

ALMUSSELL$441K

Aeluma, Inc.Dec 19, 2025

30,000 sh @ $14.70 · -1.4% own

ALMUSSELL$287.4K

Aeluma, Inc.Dec 18, 2025

20,000 sh @ $14.37 · -0.9% own

ALMUSSELL$349.8K

Aeluma, Inc.Dec 10, 2025

20,000 sh @ $17.49 · -0.9% own

ALMUSSELL$326.5K

Aeluma, Inc.Dec 9, 2025

19,139 sh @ $17.06 · -0.9% own

ALMUSSELL$178K

Aeluma, Inc.Dec 9, 2025

10,861 sh @ $16.39 · -0.5% own

ALMUSSELL$16.7K

Aeluma, Inc.Dec 8, 2025

988 sh @ $16.87 · <0.1% own

ALMUSSELL$625.8K

Aeluma, Inc.Dec 8, 2025

39,012 sh @ $16.04 · -1.7% own

ALMUSSELL$26.5K

Aeluma, Inc.Dec 5, 2025

1,610 sh @ $16.49 · <0.1% own

ALMUSSELL$457.6K

Aeluma, Inc.Dec 5, 2025

28,390 sh @ $16.12 · -1.2% own

ALMUSSELL$302.8K

Aeluma, Inc.Dec 4, 2025

18,500 sh @ $16.37 · -0.8% own

ALMUSSELL$178.1K

Aeluma, Inc.Dec 4, 2025

11,500 sh @ $15.49 · -0.5% own

ALMUSSELL$614.6K

Aeluma, Inc.Oct 20, 2025

37,500 sh @ $16.39 · -1.6% own

ALMUSSELL$13.7K

Aeluma, Inc.Oct 17, 2025

743 sh @ $18.45 · <0.1% own

ALMUSSELL$105.1K

Aeluma, Inc.Oct 17, 2025

5,913 sh @ $17.77 · -0.3% own

ALMUSSELL$558.5K

Aeluma, Inc.Oct 17, 2025

33,344 sh @ $16.75 · -1.4% own

ALMUSSELL$16.8K

Aeluma, Inc.Oct 16, 2025

810 sh @ $20.72 · <0.1% own

ALMUSSELL$132.7K

Aeluma, Inc.Oct 16, 2025

6,650 sh @ $19.96 · -0.3% own

ALMUSSELL$332.7K

Aeluma, Inc.Oct 16, 2025

17,540 sh @ $18.97 · -0.7% own

ALMUSSELL$337.8K

Aeluma, Inc.Oct 15, 2025

15,853 sh @ $21.31 · -0.7% own

ALMUSSELL$485.6K

Aeluma, Inc.Oct 15, 2025

24,147 sh @ $20.11 · -1.0% own

ALMUSSELL$731.9K

Aeluma, Inc.Oct 14, 2025

36,855 sh @ $19.86 · -1.5% own

ALMUSSELL$5.3K

Aeluma, Inc.Oct 13, 2025

300 sh @ $17.57 · <0.1% own

ALMUSSELL$594.5K

Aeluma, Inc.Oct 13, 2025

35,031 sh @ $16.97 · -1.4% own

ALMUSSELL$75.7K

Aeluma, Inc.Oct 10, 2025

4,413 sh @ $17.16 · -0.2% own

ALMUSSELL$507.7K

Aeluma, Inc.Oct 10, 2025

30,587 sh @ $16.60 · -1.2% own

ALMUSSELL$17.3K

Aeluma, Inc.Oct 9, 2025

1,000 sh @ $17.25 · <0.1% own

ALMUSSELL$593.9K

Aeluma, Inc.Oct 9, 2025

35,908 sh @ $16.54 · -1.4% own

ALMUSSELL$12.7K

Aeluma, Inc.Oct 8, 2025

700 sh @ $18.14 · <0.1% own

ALMUSSELL$598.9K

Aeluma, Inc.Oct 8, 2025

34,300 sh @ $17.46 · -1.3% own

ALMUSSELL$7.7K

Aeluma, Inc.Oct 7, 2025

400 sh @ $19.16 · <0.1% own

ALMUSSELL$147.5K

Aeluma, Inc.Oct 7, 2025

7,907 sh @ $18.66 · -0.3% own

ALMUSSELL$466.1K

Aeluma, Inc.Oct 7, 2025

26,693 sh @ $17.46 · -1.0% own

ALMUSSELL$1.2M

Aeluma, Inc.Oct 6, 2025

63,604 sh @ $18.70 · -2.3% own

ALMUSSELL$232.5K

Aeluma, Inc.Oct 3, 2025

12,958 sh @ $17.94 · -0.5% own

ALMUSSELL$314.7K

Aeluma, Inc.Oct 3, 2025

18,189 sh @ $17.30 · -0.7% own

ALMUSSELL$2.1K

Aeluma, Inc.Oct 2, 2025

120 sh @ $17.58 · 0.0% own

ALMUSSELL$596.4K

Aeluma, Inc.Oct 2, 2025

34,880 sh @ $17.10 · -1.2% own

ALMUSSELL↺$546.9K

Aeluma, Inc.Sep 30, 2025

33,800 sh @ $16.18 · -1.2% own

—JOTHER—

Surfside Acquisition Inc.Sep 5, 2025

2.8M sh · -60.0% own

—SSELL$3

Surfside Acquisition Inc.Aug 26, 2025

25,000 sh @ $0.0001 · -0.5% own

—SSELL$5

Orielle Acquisition Corp.Aug 26, 2025

50,000 sh @ $0.0001 · -1.1% own

DBHLJOTHER—

Deep Isolation Nuclear, Inc.Jul 23, 2025

2.8M sh · -60.0% own

DBHLSSELL$3

Deep Isolation Nuclear, Inc.Jul 16, 2025

25,000 sh @ $0.0001 · -0.5% own