Charles Masters

Insider

First SEC filing: Aug. 15, 2023 · Latest: Aug. 15, 2023

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Insider at

0 buys (P) 1 sells (S) Net: $-130,772 + 3 non-open-market transactions below last 12 months, based on the transactions shown below

Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted

3 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
June 1, 2026	ATMU	S	2,890	$45.25	$130,772	43,579 Direct	-6.22%	Disposed	7.6% (price as of 2026-08-20)
Aug. 14, 2023	ATMU	A	12,610	—	—	22,684 Direct	+125.17%	Acquired	(price as of 2026-08-20)
June 30, 2023	ATMU	A	5,036	—	—	10,074 Direct	+99.96%	Acquired	(price as of 2026-08-20)
June 16, 2023	ATMU	A	5,038	—	—	5,038 Direct	—	Acquired	(price as of 2026-08-20)

P = Open-market purchase · S = Sale · A = Grant/award · M = Option exercise · G = Gift · F = Tax withholding

Insider transactions are not a recommendation; sales are often driven by liquidity or tax reasons.