Tompkins Mark N.

SEC CIK: 0001455971

SEC filings (opens in a new tab)

In the past year, 13 open-market sale filings worth $19.3M and no purchases.

Current role at each company

MTTN Matternet, Inc.Other: See Remarksas of May 27, 2026
ALMU Aeluma, Inc.Other: Former 10% Owneras of Feb 5, 2026
FISN Deep Fission, Inc.Other: See Remarksas of Sep 8, 2025
Orielle Acquisition Corp.Director, 10% Owneras of Aug 28, 2025
DBHL Deep Isolation Nuclear, Inc.Other: See Remarksas of Jul 25, 2025

Show 3 more companies

Lomond Therapeutics Holdings, Inc.Other: Former Directoras of Nov 5, 2024
SERV Serve Robotics Inc.Other: Former Directoras of Aug 2, 2023
GUER Guerrilla RF, Inc.Other: Former Directoras of Nov 16, 2021

Open-market trades in the past year

Open-market purchases (P) and sales (S) filed in the last 365 days, not counting derivative securities or duplicate filings. Values leave out price outliers.

Bought: –; 0 filings
Sold: $19.3M; 13 filings
Net: −$19.3M; Bought minus sold
Companies: 1; With open-market trades

Trades

Every Form 4 that lists Tompkins Mark N. as a reporting owner, including filings made jointly with others, grouped by company. Each row adds up one type of transaction in one filing. Only open-market purchases (P) and sales (S) are shown by default.

Transaction type

Role

Minimum value (USD)

Filed from

Filed to

Filing delay at least (days)

Filing delay at most (days)

ALMU Aeluma, Inc.

Other: Former 10% Owner15 trades

Insider trades
Filed (ET)	Trade date	Filing delay	Insider	Transaction	Shares	Avg price	Value	Holding change	Flags
Feb 5, 2026 (view filing)	Feb 4	1 day	Tompkins Mark N.Other: Former 10% Owner	SSale	−34.5K	$14.71	−$507.7K	−1.9%1.79M after	2 lots
Feb 2, 2026 (view filing)	Jan 29-Feb 2	4 days	Tompkins Mark N.10% Owner	SSale	−95.0K	$16.15	−$1.53M	−4.9%1.82M after	5 lots
Jan 22, 2026 (view filing)	Jan 20-22	2 days	Tompkins Mark N.10% Owner	SSale	−105.0K	$19.14	−$2.01M	−5.2%1.92M after	8 lots
Dec 29, 2025 (view filing)	Dec 23-26	6 days	Tompkins Mark N.10% Owner	SSale	−60.0K	$16.62	−$997.4K	−2.9%2.02M after	5 lots
Dec 22, 2025 (view filing)	Dec 18-22	4 days	Tompkins Mark N.10% Owner	SSale	−85.0K	$14.68	−$1.25M	−3.9%2.08M after	3 lots
Dec 11, 2025 (view filing)	Dec 9-10	2 days	Tompkins Mark N.10% Owner	SSale	−50.0K	$17.09	−$854.3K	−2.3%2.17M after	3 lots
Dec 9, 2025 (view filing)	Dec 4-8	5 daysLate	Tompkins Mark N.10% Owner	SSale	−100.0K	$16.08	−$1.61M	−4.3%2.22M after	6 lots
Oct 21, 2025 (view filing)	Oct 17-20	4 days	Tompkins Mark N.10% Owner	SSale	−77.5K	$16.67	−$1.29M	−3.2%2.32M after	4 lots
Oct 17, 2025 (view filing)	Oct 15-16	2 days	Tompkins Mark N.10% Owner	SSale	−65.0K	$20.09	−$1.31M	−2.6%2.40M after	5 lots
Oct 14, 2025 (view filing)	Oct 10-14	4 days	Tompkins Mark N.10% Owner	SSale	−107.2K	$17.87	−$1.92M	−4.2%2.46M after	5 lots

See all 15 trades at ALMU

FISN Deep Fission, Inc.

Other: See Remarks1 trade

Insider trades
Filed (ET)	Trade date	Filing delay	Insider	Transaction	Shares	Avg price	Value	Holding change	Flags
Aug 28, 2025 (view filing)	Aug 26	2 days	Tompkins Mark N.Director, 10% Owner	SSale	−25.0K	$0.00	$0	−0.5%4.72M after

Orielle Acquisition Corp.

Director, 10% Owner1 trade

Insider trades
Filed (ET)	Trade date	Filing delay	Insider	Transaction	Shares	Avg price	Value	Holding change	Flags
Aug 28, 2025 (view filing)	Aug 26	2 days	Tompkins Mark N.Director, 10% Owner	SSale	−50.0K	$0.00	$0	−1.1%4.70M after

DBHL Deep Isolation Nuclear, Inc.