How many institutional investors hold PEN?

5 tracked institutional investors disclosed a position in PEN (PENUMBRA INC) in their most recent 13F filing.

Who is the largest institutional holder of PEN?

Izzy Englander, Millennium Management, holds the largest disclosed position in PEN, valued at $376M.

Where does this PEN ownership data come from?

SEC Form 13F-HR filings, accessed via EDGAR. 13F filings are disclosed quarterly with a 45-day reporting delay and cover U.S.-listed long equity positions only. This is not investment advice.

PEN — PENUMBRA INC

Name: PENUMBRA INC (PEN) — Institutional Ownership
Creator: InvestorLens
License: https://www.sec.gov/about/website-policies

Public company

For educational research only.InvestorLens analyzes public regulatory filings (SEC EDGAR, STOCK Act PTRs) that may be delayed by 45 days or more. Information shown is historical and is not financial, legal, or tax advice, nor a recommendation or solicitation to buy or sell any security. Always do your own research.

InvestorLens aggregates public filing data to show which tracked investors reported holdings in this stock. Dollar values represent reported position values, not market capitalization, and may be delayed up to 45 days. Not a recommendation.

Sourced from SEC EDGAR public filings

About PENUMBRA INC (PEN)

PENUMBRA INC (PEN) appears in the most recent 13F filings of 5 tracked institutional investors. The largest disclosed position is held by Izzy Englander (Millennium Management), valued at $376M. Across recent filings, tracked investors recorded 2 new positions, 2 increased, 1 reduced, and 1 exited. All data sourced from SEC 13F filings.

Tracked investors reporting PEN

Investor	Firm	Shares	Market value	% of portfolio	As of
Izzy Englander	Millennium Management	1.1M	$376.4M	0.16%	Mar 31, 2026
Ken Griffin	Citadel Advisors	252.7K	$83M	0.01%	Mar 31, 2026
George Soros	Soros Fund Management	203.4K	$66.8M	0.73%	Mar 31, 2026
Steve Cohen	Point72 Asset Management	80.8K	$25.1M	0.03%	Dec 31, 2025
Ray Dalio	Bridgewater Associates	10K	$3.3M	0.01%	Mar 31, 2026

Izzy EnglanderMar 31, 2026
Millennium Management
Shares
1.1M
Value
$376.4M
% Portfolio
0.16%
Ken GriffinMar 31, 2026
Citadel Advisors
Shares
252.7K
Value
$83M
% Portfolio
0.01%
George SorosMar 31, 2026
Soros Fund Management
Shares
203.4K
Value
$66.8M
% Portfolio
0.73%
Steve CohenDec 31, 2025
Point72 Asset Management
Shares
80.8K
Value
$25.1M
% Portfolio
0.03%
Ray DalioMar 31, 2026
Bridgewater Associates
Shares
10K
Value
$3.3M
% Portfolio
0.01%

Recent activity

Investor	Action	Δ %	Current value	Filing date
Ken Griffin	Sold	-100.00%	$0	May 15, 2026
George Soros	New	—	$66.8M	May 15, 2026
Ray Dalio	Increased	742.82%	$3.3M	May 15, 2026
Ken Griffin	Increased	0.59%	$316K	Feb 17, 2026
Ray Dalio	Reduced	-6.95%	$370	Feb 13, 2026
Ray Dalio	New	—	$324	Nov 13, 2025

Ken Griffin
Sold
$0(-100.00%)May 15, 2026
George Soros
New
$66.8MMay 15, 2026
Ray Dalio
Increased
$3.3M(742.82%)May 15, 2026
Ken Griffin
Increased
$316K(0.59%)Feb 17, 2026
Ray Dalio
Reduced
$370(-6.95%)Feb 13, 2026
Ray Dalio
New
$324Nov 13, 2025

Frequently asked questions

How many institutional investors hold PEN?: 5 tracked institutional investors disclosed a position in PEN (PENUMBRA INC) in their most recent 13F filing.
Who is the largest institutional holder of PEN?: Izzy Englander, Millennium Management, holds the largest disclosed position in PEN, valued at $376M.
Did institutional ownership of PEN increase or decrease?: Across recent 13F filings, tracked investors recorded 2 new positions, 2 increased, 1 reduced, and 1 fully exited PEN.
Where does this PEN ownership data come from?: SEC Form 13F-HR filings, accessed via EDGAR. 13F filings are disclosed quarterly with a 45-day reporting delay and cover U.S.-listed long equity positions only. This is not investment advice.