$ONTO

$223.68 +$9.51 (4.44%) Close

$ONTO Overview Financial Statements SEC Filings Executives News Red Flags Capital Raising Ownership Insider Transactions Congressional Trades

Ownership

13F as of Q2 2026 · 49.1M shares outstanding

Who owns ONTO?

By type of holder

Institutions 99.1% Insiders 0.8% Everyone else 0.2%

Concentration Top 10 holders own 37.3%

BlackRock, Inc. 11.2% · Vanguard Portfolio Management LLC 5.6%

Institutional ownership

99.1%

+1.0 pts vs last qtr

Institutional holders

690

+110 vs last qtr

Net shares bought

+499.6K

by institutions in Q2 2026

New / sold out

172 / 62

positions opened vs closed

How is ownership changing?

Institutions, last 8 quarters

Biggest buyers in Q2 2026

Invesco Ltd. +719.1K
Pictet Asset Management Holding SA +699.9K

Biggest sellers in Q2 2026

Jane Street Group, LLC −601.4K
Pacer Advisors, Inc. −358.3K

Who is planning to sell?

Notices of proposed sale, last 12 months

$902K

2 notices from 2 people

Shares covered

3.0K

0.01% of the company

Arranged in advance

100%

of the value is under a 10b5-1 plan

Under a 10b5-1 plan No plan

Largest proposed sellers

David B Miller Director 10b5-1 $600K
Susan D Lynch Director 10b5-1 $302K

Every notice on Red Flags →

A Form 144 is notice of a planned sale, not the sale itself. What insiders actually sold is on Insider Transactions.

Is your stake being diluted?

Diluted share count, FY2016–FY2025

−2.1%

−0.23% a year

Each share's claim on the business

+2.1%

grew without buying or selling a share

Spent on buybacks vs paid in stock

$269M vs $173M

over 10 fiscal years

Diluted shares, split-adjusted

Buybacks Stock-based comp

How patient are the owners?

Institutional shares by how long they've been held

5+ years63% 3–5 years5% 1–3 years12% Under 1 year20%

Quarterly turnover

17.7%

of institutional shares changed hands

Top 10 managers, median time held

5 years

Super Investors

Investment managers reporting ONTO on Form 13F

Holder	Shares	% of company	Change vs last qtr	Held since	% of their book
B BlackRock, Inc.	5.5M	11.22%	−29.1K (−0.5%)	≤2021	0.0%
Shares held by quarter Peak holding6.5M (Q2'25) Change over 8 quarters−466.3K Share of the company11.220% BlackRock, Inc.'s full portfolio →
VP Vanguard Portfolio Management LLC	2.7M	5.56%	−15.1K (−0.6%)	≤2021	0.1%
Shares held by quarter Peak holding2.7M (Q1'26) Change over 8 quarters+2.7M Share of the company5.560% Vanguard Portfolio Management LLC's full portfolio →

BlackRock, Inc.

5.5M

% of company

11.22%

Change vs last qtr

−29.1K (−0.5%)

Held since

≤2021

Vanguard Portfolio Management LLC

2.7M

% of company

5.56%

Change vs last qtr

−15.1K (−0.6%)

Held since

≤2021

28 more super investors behind a free account

See every manager holding Onto Innovation Inc., how their position has changed, and how long they've held it.

Institutional Funds

Mutual funds and ETFs reporting ONTO on Form N-PORT; together they hold 44.5% of the company

Fund	Position value	Shares	% of company	% of the fund	As of
IC iShares Core S&P Mid-Cap ETF iShares Trust	$644M	1.7M	3.47%	0.52%	June 30, 2026
VT Vanguard Total Stock Market Index Fund Vanguard Index Funds	$598M	1.6M	3.22%	0.03%	June 30, 2026

iShares Core S&P Mid-Cap ETF

iShares Trust

Position value

$644M

% of company

3.47%

% of the fund

0.52%

As of

June 30, 2026

Vanguard Total Stock Market Index Fund

Vanguard Index Funds

Position value

$598M

% of company

3.22%

% of the fund

0.03%

As of

June 30, 2026

23 more funds behind a free account

See every fund holding Onto Innovation Inc. and how much of the fund the position is.

Insiders and 5%+ holders

From Forms 3/4/5 and Schedules 13D/G

Holder	Shares	% of company	Change vs last qtr	8 quarters	Held since	% of their book
PM Plisinski Michael P Insider	179.2K	0.37%	—	—	—	—
Insider holdings come from Form 3/4/5 filings, which are not quarterly. Share of the company0.370% Plisinski Michael P's insider activity →
SC Seams Christopher A Insider	38.5K	0.08%	—	—	—	—
Insider holdings come from Form 3/4/5 filings, which are not quarterly. Share of the company0.080% Seams Christopher A's insider activity →

Plisinski Michael P

Insider

179.2K

% of company

0.37%

Change vs last qtr

—

Held since

—

Seams Christopher A

Insider

38.5K

% of company

0.08%

Change vs last qtr

—

Held since

—

12 more holders behind a free account

See every insider and 5%+ holder of Onto Innovation Inc..

Comments