$PEN

$325.22 +$0.83 (0.26%) Close

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

Ownership

13F as of Q2 2026 · 39.4M shares outstanding

Who owns PEN?

By type of holder

Institutions 86.4% Insiders 4.0% Everyone else 9.6%

Concentration Top 10 holders own 39.6%

BlackRock, Inc. 10.9% · HBK Investments L P 4.7%

Institutional ownership

86.4%

+0.5 pts vs last qtr

Institutional holders

447

-37 vs last qtr

Net shares bought

+192.6K

by institutions in Q2 2026

New / sold out

45 / 82

positions opened vs closed

How is ownership changing?

Institutions, last 8 quarters

Biggest buyers in Q2 2026

Norges Bank NEW +752.2K
Jpmorgan Chase & Co +668.8K

Biggest sellers in Q2 2026

Baillie Gifford & Co SOLD OUT −840.4K
Millennium Management LLC −397.5K

Who is planning to sell?

Notices of proposed sale, last 12 months

$10.1M

8 notices from 5 people

Shares covered

35.3K

0.09% 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

Arani Bose Affiliate 10b5-1 $8.39M
Maggie Yuen Officer 10b5-1 $832K

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

+17.4%

+1.80% a year

Each share's claim on the business

−14.8%

shrank without buying or selling a share

Spent on buybacks vs paid in stock

$100M vs $357M

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+ years57% 3–5 years3% 1–3 years7% Under 1 year32%

Quarterly turnover

18.4%

of institutional shares changed hands

Top 10 managers, median time held

5 years

Super Investors

Investment managers reporting PEN on Form 13F

Holder	Shares	% of company	Change vs last qtr	Held since	% of their book
B BlackRock, Inc.	4.3M	10.91%	−32.9K (−0.8%)	≤2021	0.0%
Shares held by quarter Peak holding4.3M (Q1'26) Change over 8 quarters+228.5K Share of the company10.910% BlackRock, Inc.'s full portfolio →
HI HBK Investments L P	1.8M	4.67%	+204.2K (+12.5%)	Q1 '26	5.6%
Shares held by quarter Peak holding1.8M (Q2'26) Change over 8 quarters+1.8M Share of the company4.670% HBK Investments L P's full portfolio →

BlackRock, Inc.

4.3M

% of company

10.91%

Change vs last qtr

−32.9K (−0.8%)

Held since

≤2021

HBK Investments L P

1.8M

% of company

4.67%

Change vs last qtr

+204.2K (+12.5%)

Held since

Q1 '26

28 more super investors behind a free account

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

Institutional Funds

Mutual funds and ETFs reporting PEN on Form N-PORT; together they hold 31.2% of the company

Fund	Position value	Shares	% of company	% of the fund	As of
IC iShares Core S&P Mid-Cap ETF iShares Trust	$425M	1.3M	3.42%	0.34%	June 30, 2026
VT Vanguard Total Stock Market Index Fund Vanguard Index Funds	$375M	1.2M	3.01%	0.02%	June 30, 2026

iShares Core S&P Mid-Cap ETF

iShares Trust

Position value

$425M

% of company

3.42%

% of the fund

0.34%

As of

June 30, 2026

Vanguard Total Stock Market Index Fund

Vanguard Index Funds

Position value

$375M

% of company

3.01%

% of the fund

0.02%

As of

June 30, 2026

23 more funds behind a free account

See every fund holding Penumbra, 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
EA Elsesser Adam Insider	865.5K	2.20%	—	—	—	—
Insider holdings come from Form 3/4/5 filings, which are not quarterly. Share of the company2.200% Elsesser Adam's insider activity →
BA Bose Arani Insider	509.6K	1.29%	—	—	—	—
Insider holdings come from Form 3/4/5 filings, which are not quarterly. Share of the company1.290% Bose Arani's insider activity →

Elsesser Adam

Insider

865.5K

% of company

2.20%

Change vs last qtr

—

Held since

—

Bose Arani

Insider

509.6K

% of company

1.29%

Change vs last qtr

—

Held since

—

10 more holders behind a free account

See every insider and 5%+ holder of Penumbra, Inc..

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