Penumbra Inc

PENNYSE

$317.55-0.45 (-0.14%)as of Oct 2, 2026

Legend

Insider buy

Insider sell

Congress buy

Congress sell

Hedge Funds
bought vs soldGreener markers show more buyers; redder markers show more sellers.

Company share activityNet buybacksNo changeNet dilution

Marker size reflects transaction size.

Insider buy
Insider sell
Congress buy
Congress sell
Hedge Funds bought vs sold

Share activityNet buybacksNo changeNet dilution

Marker size reflects transaction size. Greener fund markers mean more buyers.

Insider Buy
Insider Sell
Congress Buy
Congress Sell
Hedge funds bought vs sold
BuybackNo changeNet dilution

Penumbra Inc price and activity chart data

Showing the 1Y range: Oct 2, 2025 to Oct 2, 2026. Price (+25.3%). 0 insider or congressional trades plotted in this window as 0 markers; nearby trades of the same kind are grouped.

Transactions plotted on the price chart
Date	Category	Person	Role	Action	Amount	Change in holding

Largest institutional holders

13F · Q2 2026

Fund	% of company held	Value	% of portfolio	Quarterly activity
BlackRock, Inc.	10.93%	$1.36B	0.02%	Not reported
HBK Investments L P	4.67%	$581M	5.67%	Add 12.50%
Vanguard Capital Management LLC	4.35%	$540M	0.01%	Not reported
Vanguard Portfolio Management LLC	4.24%	$526M	0.02%	Not reported
State Street Corp	3.16%	$393M	0.01%	Not reported
ExodusPoint Capital Management, LP	2.77%	$344M	2.22%	Not reported
Balyasny Asset Management L.P.	2.77%	$344M	0.43%	Not reported
JPMorgan Chase & Co	2.72%	$339M	0.02%	Not reported
Goldman Sachs Group Inc	2.15%	$267M	0.02%	Not reported
Arrowstreet Capital, Limited Partnership	2.12%	$264M	0.12%	Not reported
Geode Capital Management, LLC	2.03%	$252M	0.01%	Not reported
Norges Bank	1.91%	$238M	0.02%	Not reported
UBS Group AG	1.79%	$222M	0.03%	Not reported
Millennium Management LLC	1.78%	$221M	0.08%	Not reported
Morgan Stanley	1.50%	$187M	0.01%	Not reported
AQR Arbitrage LLC	1.43%	$178M	2.54%	Not reported
Whitebox Advisors LLC	1.29%	$160M	2.09%	Not reported
Capital World Investors	1.22%	$151M	0.02%	Add 6.41%
Citadel Advisors LLC	1.14%	$142M	0.02%	Not reported
Neuberger Berman Group LLC	1.12%	$138M	0.09%	Not reported
Citigroup Inc	1.10%	$137M	0.05%	Not reported
Two Sigma Investments, LP	1.09%	$135M	0.10%	Not reported
Tudor Investment Corp Et Al	1.02%	$127M	0.18%	Not reported
Charles Schwab Investment Management Inc	0.87%	$109M	0.01%	Not reported
Northern Trust Corp	0.85%	$105M	0.01%	Not reported
Dimensional Fund Advisors LP	0.83%	$103M	0.02%	Not reported
Alliancebernstein L.P.	0.77%	$99M	0.03%	Not reported
Bank of America Corp	0.68%	$84M	0.01%	Not reported
Invesco Ltd.	0.67%	$83.4M	0.01%	Not reported
Magnetar Financial LLC	0.65%	$80.8M	0.74%	Not reported
Vanguard Fiduciary Trust Co	0.64%	$79.5M	0.02%	Not reported
Bank of New York Mellon Corp	0.60%	$74.3M	0.01%	Not reported
Champlain Investment Partners, LLC	0.56%	$69.2M	1.78%	Reduce 55.43%
TIG Advisors, LLC	0.55%	$67.9M	3.01%	Not reported
FMR LLC	0.54%	$66.6M	0.00%	Not reported
Hudson Bay Capital Management LP	0.52%	$64.1M	0.17%	Not reported
D. E. Shaw & Co., Inc.	0.50%	$62.3M	0.03%	Not reported
Alpine Associates Management Inc.	0.48%	$59.7M	3.74%	Add 43.23%
Melqart Asset Management (UK) Ltd	0.47%	$58.6M	5.58%	Add 127.00%
Caxton Associates LLP	0.46%	$56.6M	1.06%	Reduce 2.86%
Adage Capital Partners GP, L.L.C.	0.45%	$55.8M	0.08%	Add 30.90%
Birnam Oak Advisors, LP	0.44%	$54.1M	8.78%	Add 78.43%
Glazer Capital, LLC	0.40%	$49.9M	1.23%	Not reported
Westchester Capital Management, LLC	0.40%	$49.7M	2.43%	Add 105.50%
Water Island Capital LLC	0.38%	$47.5M	4.42%	Add 25.28%
Woodline Partners LP	0.37%	$46.1M	0.14%	Not reported
Verition Fund Management LLC	0.36%	$44.9M	0.23%	Not reported
Decagon Asset Management LLP	0.36%	$44.8M	8.54%	Reduce 15.27%
Squarepoint Ops LLC	0.35%	$43.7M	0.05%	Not reported
Slotnik Capital, LLC	0.34%	$42M	10.85%	Add 31.68%

50 of 425 holders

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