PEN

PENUMBRA INC
USCUSIP 70975L107
Institutional Owners
195
+45 QoQ
13F Value Held
$3.9B
Insider Net · 180d
$0
0↑ 0↓
Recent Filings
0
Smart-money sentimentBullish
BearishBullish
13F funds (latest Q)70 adding · 24 trimming
Insider net (180d)+$0
Price history not yet available for PEN.

Top institutional holders

195 13F filers
#FundPosition valueSharesLast moveAs of
1VANGUARD CAPITAL MANAGEMENT LLC
$556.4M
1.69MNewQ1 2026
2VANGUARD PORTFOLIO MANAGEMENT LLC
$543.3M
1.65MNewQ1 2026
3HBK INVESTMENTS L P
$536.6M
1.63MNewQ1 2026
4STATE STREET CORP
$389.4M
1.19MAddedQ1 2026
5Champlain Investment Partners, LLC
$161.4M
491.4KReducedQ1 2026
6WHITEBOX ADVISORS LLC
$146.1M
445.0KNewQ1 2026
7AQR Arbitrage LLC
$138.9M
423.1KNewQ1 2026
8TUDOR INVESTMENT CORP ET AL
$135.0M
411.1KNewQ1 2026
9Hudson Bay Capital Management LP
$90.1M
274.3KNewQ1 2026
10VANGUARD FIDUCIARY TRUST CO
$81.2M
247.2KNewQ1 2026
11Woodline Partners LP
$79.3M
241.6KNewQ1 2026
12BANK OF NOVA SCOTIA
$69.6M
211.8KAddedQ1 2026
13SOROS FUND MANAGEMENT LLC
$66.8M
203.4KNewQ1 2026
14LMR Partners LLP
$64.3M
195.7KNewQ1 2026
15CAXTON ASSOCIATES LLP
$60.6M
184.7KNewQ1 2026
16Magnetar Financial LLC
$57.1M
173.9KNewQ1 2026
17CITADEL ADVISORS LLC
$47.7M
145.3KAddedQ1 2026
18CAPITOLIS LIQUID GLOBAL MARKETS LLC
$45.8M
139.4KNewQ1 2026
19Rock Springs Capital Management LP
$39.6M
120.5KHeldQ1 2026
20NATIXIS
$38.2M
116.2KNewQ1 2026
21Holocene Advisors, LP
$36.3M
110.6KReducedQ1 2026
22BRAIDWELL LP
$34.6M
105.4KReducedQ1 2026
23Empyrean Capital Partners, LP
$27.9M
85.0KNewQ1 2026
24Alberta Investment Management Corp
$26.3M
80.0KNewQ1 2026
25PICTON MAHONEY ASSET MANAGEMENT
$26.3M
80.0KNewQ1 2026

Fund activity — latest quarter

Opened (NEW)
35
funds
Added
35
funds
Reduced
24
funds
Exited
0
funds

Insider activity (Form 4)

No Form 4 insider transactions on file yet.

Institutional ownership over time

186 funds+183 since Q2 2022
093186Q2 2022Q1 2023Q4 2023Q3 2024Q2 2025Q1 2026
funds holding aggregate valuelatest $3.4B

Funds that own PEN also own

CompanyCo-held byCombined value
Meta Platforms, Inc.META176 funds$83.8B
Nvidia Corp. (US)NVDA174 funds$276.1B
Amazon.com, Inc.AMZN174 funds$138.3B
Microsoft Corp.MSFT173 funds$185.5B
Lilly Eli & CompanyLLY173 funds$50.9B
GOOGLE INCGOOGL172 funds$113.0B
Mastercard Inc-Class AMA171 funds$31.4B
Boston Scientific Corp.BSX171 funds$8.3B
Broadcom LtdAVGO170 funds$97.3B
Tesla Motors IncTSLA170 funds$64.0B
Apple Inc.AAPL169 funds$237.8B
Advanced Micro Devices Inc.AMD169 funds$25.2B

Ranked by how many of PEN's institutional holders also hold each name — a cross-fund conviction signal. Via the MCP server (ticker.co_held).

Recent filings

0 shown

No filings captured for this ticker in the live stream yet.

13F holdings + Form 4 insider transactions + end-of-day price history + the live filing stream, joined for PEN. Filings are public domain, sourced to SEC EDGAR; price series derived from end-of-day closes. Every panel above is one call to the Arkolith API & MCP server.