13FBOX
PENUMBRA INC · 13F Institutional Holdings
Options Calculator Rankings

PENUMBRA INC

PEN
Institutions
455
Combined AUM (Q2 2026)
$11.05B
Combined Shares (Q2 2026)
35.0M
Overall Trend
Increase
All institutions combined
📥 Inflow (Q1 2026→Q2 2026)
+6.2M
196 · 50 New Buys · ≈
📤 Outflow (Q1 2026→Q2 2026)
-5.8M
258 · 77 Exit · ≈
⚖️ Net
+410,608
Net Buy
💰 Net Value
≈ —
est. price
Latest AUM (Q2 2026)
$11.05B
Institutions
455
New Buys
50
Adds
146
Reduces
181
Exits
77
Unchanged
78
Ownership TrendPortfolio %Prev Q %RankQ2 2026 ValueQ2 2026 SharesPrev Q ValuePrev Q SharesShares ChangeAction
BlackRock, Inc.
0.02%0.02%#176$1.36B4.3M$1.42B4.3M-32,901-0.76%Reduce
HBK INVESTMENTS L P
5.67%5.45%#5$580.5M1.8M$536.6M1.6M+204,247+12.50%Add
VANGUARD CAPITAL MANAGEMENT LLC
0.01%0.01%#225$539.9M1.7M$556.4M1.7M+15,389+0.91%Add
VANGUARD PORTFOLIO MANAGEMENT LLC
0.02%0.03%#164$526.4M1.7M$543.3M1.7M+12,799+0.77%Add
STATE STREET CORP
0.01%0.01%#223$392.6M1.2M$389.4M1.2M+57,447+4.84%Add
ExodusPoint Capital Management, LP
2.22%#20$344.3M1.1M$00+1.1MNew Buy
BALYASNY ASSET MANAGEMENT L.P.
0.43%0.32%#52$344.2M1.1M$250.2M762,096+328,067+43.05%Add
JPMORGAN CHASE & CO
0.02%0.01%#180$338.6M1.1M$132.1M402,619+668,835+166.12%Add
MILLENNIUM MANAGEMENT LLC
0.1%0.16%#90$299.2M947,611$376.4M1.1M-198,525-17.32%Reduce
GOLDMAN SACHS GROUP INC
0.02%0.03%#169$270.5M856,804$236.6M720,575+136,229+18.91%Add
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP
0.12%0.07%#86$263.6M834,903$131.4M400,160+434,743+108.64%Add
GEODE CAPITAL MANAGEMENT, LLC
0.01%0.02%#205$251.5M796,471$261.3M795,448+1,023+0.13%Add
NORGES BANK
0.02%0.02%#165$237.5M752,242$114.4M427,663+324,579+75.90%Add
UBS Group AG
0.03%0.03%#150$222.2M703,822$184.0M560,335+143,487+25.61%Add
MORGAN STANLEY
0.01%0.01%#233$186.9M591,824$175.7M693,454-101,630-14.66%Reduce
AQR Arbitrage LLC
2.54%2.28%#16$178.0M563,873$138.9M423,073+140,800+33.28%Add
WHITEBOX ADVISORS LLC
2.09%1.8%#21$160.0M506,881$146.1M445,001+61,880+13.91%Add
CITADEL ADVISORS LLC
0.02%0.01%#182$158.4M501,663$83.0M252,725+248,938+98.50%Add
Capital World Investors
0.02%0.02%#183$151.5M479,701$148.0M450,815+28,886+6.41%Add
Neuberger Berman Group LLC
0.09%0.08%#95$138.5M438,553$99.7M303,621+134,932+44.44%Add
CITIGROUP INC
0.05%0.09%#120$136.8M433,125$203.9M620,943-187,818-30.25%Reduce
TWO SIGMA INVESTMENTS, LP
0.1%0.02%#92$135.2M428,128$19.1M58,219+369,909+635.38%Add
TUDOR INVESTMENT CORP ET AL
0.18%0.25%#65$126.5M400,649$135.0M411,118-10,469-2.55%Reduce
CHARLES SCHWAB INVESTMENT MANAGEMENT INC
0.01%0.02%#200$108.5M343,713$105.9M322,416+21,297+6.61%Add
NORTHERN TRUST CORP
0.01%0.01%#216$105.2M333,064$105.4M320,853+12,211+3.81%Add
DIMENSIONAL FUND ADVISORS LP
0.02%0.02%#179$103.0M326,120$107.0M325,843+277+0.09%Add
ALLIANCEBERNSTEIN L.P.
0.03%0.02%#137$99.0M301,585$70.4M226,317+75,268+33.26%Add
BANK OF AMERICA CORP /DE/
0.01%0.01%#260$84.0M266,017$85.3M259,775+6,242+2.40%Add
Invesco Ltd.
0.01%0.03%#252$83.4M263,980$176.7M538,197-274,217-50.95%Reduce
Magnetar Financial LLC
0.74%0.84%#45$80.8M255,841$82.6M251,433+4,408+1.75%Add
VANGUARD FIDUCIARY TRUST CO
0.02%0.02%#186$79.5M251,746$81.2M247,235+4,511+1.82%Add
Bank of New York Mellon Corp
0.01%0.01%#217$74.3M235,328$81.0M246,527-11,199-4.54%Reduce
Hudson Bay Capital Management LP
0.2%0.4%#60$73.7M233,438$114.6M349,038-115,600-33.12%Reduce
LMR Partners LLP
0.27%0.21%#57$72.5M229,693$97.1M295,708-66,015-22.32%Reduce
SUSQUEHANNA INTERNATIONAL GROUP, LLP
0.01%0.01%#258$72.3M228,949$73.2M223,031+5,918+2.65%Add
Champlain Investment Partners, LLC
1.78%2.05%#26$69.2M219,032$161.4M491,382-272,350-55.43%Reduce
TIG Advisors, LLC
3.01%0.91%#13$67.9M215,082$19.7M60,082+155,000+257.98%Add
FMR LLC
<0.01%0.01%#297$66.6M211,002$162.9M496,107-285,105-57.47%Reduce
D. E. Shaw & Co., Inc.
0.03%0.04%#147$62.3M197,329$66.3M201,950-4,621-2.29%Reduce
ALPINE ASSOCIATES MANAGEMENT INC.
3.73%2.55%#10$59.7M188,986$43.3M131,950+57,036+43.23%Add
Melqart Asset Management (UK) Ltd
5.58%2.65%#6$58.6M185,734$26.9M81,822+103,912+127.00%Add
CAXTON ASSOCIATES LLP
1.06%1.37%#35$56.6M179,384$60.6M184,663-5,279-2.86%Reduce
ADAGE CAPITAL PARTNERS GP, L.L.C.
0.08%0.07%#99$55.8M176,720$44.3M135,000+41,720+30.90%Add
Birnam Oak Advisors, LP
8.78%7.15%#2$54.1M171,277$31.5M95,990+75,287+78.43%Add
GLAZER CAPITAL, LLC
1.24%0.66%#32$50.0M158,466$31.1M94,819+63,647+67.12%Add
Westchester Capital Management, LLC
2.43%1.14%#18$49.7M157,472$25.2M76,630+80,842+105.50%Add
WATER ISLAND CAPITAL LLC
4.42%4.4%#8$47.5M150,456$39.4M120,095+30,361+25.28%Add
Woodline Partners LP
0.14%0.3%#76$46.1M145,844$79.3M241,597-95,753-39.63%Reduce
Verition Fund Management LLC
0.06%0.07%#107$44.9M142,309$22.3M68,000+74,309+109.28%Add
Decagon Asset Management LLP
8.54%14.25%#3$44.8M142,001$55.0M167,588-25,587-15.27%Reduce

🧭 Institutional Sector Flow Heatmap

Net Outflow Net Inflow