Mark Slicer

Insider

First SEC filing: March 5, 2024 · Latest: March 5, 2024

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Insider at

0 buys (P) 0 sells (S) Net: $0 + 9 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

9 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
March 1, 2024	ONTO	A	2,077	—	—	14,704 Direct	+16.45%	Acquired	(price as of 2026-08-20)
March 1, 2024	ONTO	A	1,039	—	—	1,039 Direct	—	Acquired	(price as of 2026-08-20)
March 1, 2024	ONTO	A	1,038	—	—	1,038 Direct	—	Acquired	(price as of 2026-08-20)
Feb. 14, 2024	ONTO	F	484	$173.08	$83,771	12,627 Direct	-3.69%	Disposed	71.3% (price as of 2026-08-20)
Sept. 15, 2023	ONTO	S 10b5-1	728	$123.64	$90,010	15,388 Direct	-4.52%	Disposed	139.8% (price as of 2026-08-20)
Sept. 15, 2023	ONTO	S 10b5-1	601	$124.31	$74,710	14,787 Direct	-3.91%	Disposed	138.5% (price as of 2026-08-20)
Sept. 15, 2023	ONTO	S 10b5-1	1,507	$125.98	$189,852	13,280 Direct	-10.19%	Disposed	135.3% (price as of 2026-08-20)
Sept. 15, 2023	ONTO	S 10b5-1	169	$127.03	$21,468	13,111 Direct	-1.27%	Disposed	133.4% (price as of 2026-08-20)
May 17, 2023	ONTO	F	1,269	$97.95	$124,299	16,116 Direct	-7.30%	Disposed	202.7% (price as of 2026-08-20)
Feb. 14, 2023	ONTO	A	4,564	—	—	17,385 Direct	+35.60%	Acquired	(price as of 2026-08-20)
Feb. 14, 2023	ONTO	A	2,282	—	—	2,282 Direct	—	Acquired	(price as of 2026-08-20)
Feb. 14, 2023	ONTO	A	2,281	—	—	2,281 Direct	—	Acquired	(price as of 2026-08-20)
May 17, 2022	ONTO	A	12,821	—	—	12,821 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.

Options, RSUs and convertible securities reported on Form 4 Table II.

Date	Ticker	Security	Underlying	Exercise price	Expiration	Shares	A/D
March 1, 2024	ONTO	Performance Stock Unit	Common Stock (1,039)	—	March 1, 2026	1,039	Acquired
March 1, 2024	ONTO	Performance Stock Unit	Common Stock (1,038)	—	March 1, 2027	1,038	Acquired
Feb. 14, 2023	ONTO	Performance Stock Unit	Common Stock (2,282)	—	Feb. 14, 2025	2,282	Acquired
Feb. 14, 2023	ONTO	Performance Stock Unit	Common Stock (2,281)	—	Feb. 14, 2026	2,281	Acquired

Exercise/conversion price is blank when not applicable (e.g. RSUs).

Matched by name from proxy statements (DEF 14A) — verify against the filing.

Fiscal year	Salary	Bonus	Stock awards	Option awards	Non-equity incentive	Pension change	Other	Total
2025	$225,813	—	$814,519	—	—	—	$1,889,270	$2,929,602
2024	$463,500	—	$922,402	—	$336,779	—	$7,530	$1,730,211
2023	$461,942	—	$834,971	—	$237,287	—	$10,590	$1,544,790

Figures from the Summary Compensation Table of the company's proxy statement (DEF 14A). Compensation is not a recommendation.