Arrowhead Research Corp

Q2 2026 vs Q3 2026

Comparing institutional holders between quarters

Compare Detailed Historical Funds Options 13D/13G Peers Targeting Trading Summary Profile

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Mackay Shields LLC

INCREASED

Shares27,193,000 from 20,457,000

Change+6,736,000 (+33%)

Value$27.8M (+$3.4M)

Filed 2026-10-13

Calamos Advisors LLC

DECREASED

Shares22,187,000 from 22,199,000

Change-12,000 (0%)

Value$22.8M (-$3.9M)

Filed 2026-11-02

Citigroup Inc

INCREASED

Shares4,222,000 from 6,000

Change+4,216,000 (+70267%)

Value$4.3M (+$4.3M)

Filed 2026-11-04

AGF Management LTD

DECREASED

Shares1,950,000 from 2,250,000

Change-300,000 (-13%)

Value$2.0M (-$692.9K)

Filed 2026-11-03

Acasta Partners UK LLP

UNCHANGED

Shares1,500,000 from 1,500,000

Change0 (0%)

Value$1.5M (-$264.8K)

Filed 2026-10-05

RWC Asset Management LLP

DECREASED

Shares994,000 from 1,307,000

Change-313,000 (-24%)

Value$1.0M (-$541.8K)

Filed 2026-10-22

Bank of New York Mellon Corp

DECREASED

Shares900,000 from 1,115,000

Change-215,000 (-19%)

Value$930.2K (-$408.5K)

Filed 2026-11-05

Central Pacific Bank - Trust Division

UNCHANGED

Shares342,000 from 342,000

Change0 (0%)

Value$349.5K (-$58.7K)

Filed 2026-10-06

Axxion S.A.

NEW

Shares200,000

Change+200,000

Value$205.0K

Filed 2026-10-22

Oppenheimer Asset Management Inc.

DECREASED

Shares100,000 from 103,000

Change-3,000 (-3%)

Value$102.2K (-$20.8K)

Filed 2026-10-27

Calamos Wealth Management LLC

DECREASED

Shares58,000 from 87,000

Change-29,000 (-33%)

Value$59.7K (-$45.2K)

Filed 2026-11-02

Context Capital Management, LLC

CLOSED

Shares0 from 18,400,000

Change-18,400,000 (-100%)

Value$0 (-$22.0M)

Filed 2026-11-04

Deerfield Management Company, L.P.

N/A

Shares— from 200,000,000

Change-200,000,000 (-100%)

Value—

Camden Asset Management L P

N/A

Shares— from 64,283,000

Change-64,283,000 (-100%)

Value—

LMR Partners LLP

N/A

Shares— from 40,000,000

Change-40,000,000 (-100%)

Value—

Linden Advisors LP

N/A

Shares— from 34,889,000

Change-34,889,000 (-100%)

Value—

UBS Asset Management Americas LLC

N/A

Shares— from 29,000,000

Change-29,000,000 (-100%)

Value—

Readystate Asset Management LP

N/A

Shares— from 25,000,000

Change-25,000,000 (-100%)

Value—

Lazard Asset Management LLC

N/A

Shares— from 24,898,000

Change-24,898,000 (-100%)

Value—

DeepCurrents Investment Group LLC

N/A

Shares— from 19,000,000

Change-19,000,000 (-100%)

Value—

State Street Corp

N/A

Shares— from 18,450,000

Change-18,450,000 (-100%)

Value—

Advent Capital Management

N/A

Shares— from 17,840,000

Change-17,840,000 (-100%)

Value—

DZ Bank AG Deutsche Zentral Genossenschafts Bank, Frankfurt am Main

N/A

Shares— from 12,150,000

Change-12,150,000 (-100%)

Value—

Oaktree Capital Management LP

N/A

Shares— from 9,146,000

Change-9,146,000 (-100%)

Value—

Balyasny Asset Management L.P.

N/A

Shares— from 8,500,000

Change-8,500,000 (-100%)

Value—

Lombard Odier Asset Management (Europe) Ltd

N/A

Shares— from 8,452,000

Change-8,452,000 (-100%)

Value—

Lord, Abbett & Co. LLC

N/A

Shares— from 7,265,000

Change-7,265,000 (-100%)

Value—

FMR LLC

N/A

Shares— from 7,140,000

Change-7,140,000 (-100%)

Value—

Citadel Advisors LLC

N/A

Shares— from 7,100,000

Change-7,100,000 (-100%)

Value—

SSI Investment Management LLC

N/A

Shares— from 6,587,000

Change-6,587,000 (-100%)

Value—

Shenkman Capital Management Inc

N/A

Shares— from 5,752,000

Change-5,752,000 (-100%)

Value—

Weiss Asset Management LP

N/A

Shares— from 5,000,000

Change-5,000,000 (-100%)

Value—

State of Wisconsin Investment Board

N/A

Shares— from 4,000,000

Change-4,000,000 (-100%)

Value—

Morgan Stanley

N/A

Shares— from 3,797,000

Change-3,797,000 (-100%)

Value—

Millennium Management LLC

N/A

Shares— from 3,125,000

Change-3,125,000 (-100%)

Value—

Amundi

N/A

Shares— from 3,100,000

Change-3,100,000 (-100%)

Value—

Toronto Dominion Bank

N/A

Shares— from 3,056,000

Change-3,056,000 (-100%)

Value—

Bank of America Corp

N/A

Shares— from 2,680,000

Change-2,680,000 (-100%)

Value—

Tenor Capital Management Co., L.P.

N/A

Shares— from 2,000,000

Change-2,000,000 (-100%)

Value—

Invesco Ltd.

N/A

Shares— from 2,000,000

Change-2,000,000 (-100%)

Value—

Man Group plc

N/A

Shares— from 1,805,000

Change-1,805,000 (-100%)

Value—

BNP Paribas Financial Markets

N/A

Shares— from 1,386,000

Change-1,386,000 (-100%)

Value—

Groupama Asset Managment

N/A

Shares— from 1,000,000

Change-1,000,000 (-100%)

Value—

Wells Fargo & Company

N/A

Shares— from 885,000

Change-885,000 (-100%)

Value—

Kohlberg Kravis Roberts & Co. L.P.

N/A

Shares— from 800,000

Change-800,000 (-100%)

Value—

SEI Investments Co

N/A

Shares— from 200,000

Change-200,000 (-100%)

Value—

Russell Investments Group, Ltd.

N/A

Shares— from 182,000

Change-182,000 (-100%)

Value—

UBS Group AG

N/A

Shares— from 152,000

Change-152,000 (-100%)

Value—

Ares Systematic Credit Ltd

N/A

Shares— from 100,000

Change-100,000 (-100%)

Value—

Loomis Sayles & Co L P

N/A

Shares— from 65,633

Change-65,633 (-100%)

Value—

Stephens Inc

N/A

Shares— from 33,000

Change-33,000 (-100%)

Value—

SG Americas Securities, LLC

N/A

Shares— from 29,150

Change-29,150 (-100%)

Value—

Adar1 Capital Management, LLC

N/A

Shares— from 10,000

Change-10,000 (-100%)

Value—

	Status
Mackay Shields LLC	INCREASED	27,193,000	20,457,000	+6,736,000	+33%	$24.5M	$27.8M	+$3.4M	2026-10-13
Calamos Advisors LLC	DECREASED	22,187,000	22,199,000	-12,000	0%	$26.8M	$22.8M	-$3.9M	2026-11-02
Citigroup Inc	INCREASED	4,222,000	6,000	+4,216,000	+70267%	$7.2K	$4.3M	+$4.3M	2026-11-04
AGF Management LTD	DECREASED	1,950,000	2,250,000	-300,000	-13%	$2.7M	$2.0M	-$692.9K	2026-11-03
Acasta Partners UK LLP	UNCHANGED	1,500,000	1,500,000	0	0%	$1.8M	$1.5M	-$264.8K	2026-10-05
RWC Asset Management LLP	DECREASED	994,000	1,307,000	-313,000	-24%	$1.6M	$1.0M	-$541.8K	2026-10-22
Bank of New York Mellon Corp	DECREASED	900,000	1,115,000	-215,000	-19%	$1.3M	$930.2K	-$408.5K	2026-11-05
Central Pacific Bank - Trust Division	UNCHANGED	342,000	342,000	0	0%	$408.2K	$349.5K	-$58.7K	2026-10-06
Axxion S.A.	NEW	200,000	—	+200,000	—	—	$205.0K	—	2026-10-22
Oppenheimer Asset Management Inc.	DECREASED	100,000	103,000	-3,000	-3%	$123.0K	$102.2K	-$20.8K	2026-10-27
Calamos Wealth Management LLC	DECREASED	58,000	87,000	-29,000	-33%	$104.9K	$59.7K	-$45.2K	2026-11-02
Context Capital Management, LLC	CLOSED	0	18,400,000	-18,400,000	-100%	$22.0M	$0	-$22.0M	2026-11-04
Deerfield Management Company, L.P.	N/A	—	200,000,000	-200,000,000	-100%	$240.5M	—	—	—
Camden Asset Management L P	N/A	—	64,283,000	-64,283,000	-100%	$76.7M	—	—	—
LMR Partners LLP	N/A	—	40,000,000	-40,000,000	-100%	$47.8M	—	—	—
Linden Advisors LP	N/A	—	34,889,000	-34,889,000	-100%	$41.8M	—	—	—
UBS Asset Management Americas LLC	N/A	—	29,000,000	-29,000,000	-100%	$34.6M	—	—	—
Readystate Asset Management LP	N/A	—	25,000,000	-25,000,000	-100%	$29.9M	—	—	—
Lazard Asset Management LLC	N/A	—	24,898,000	-24,898,000	-100%	$298.1K	—	—	—
DeepCurrents Investment Group LLC	N/A	—	19,000,000	-19,000,000	-100%	$22.8M	—	—	—
State Street Corp	N/A	—	18,450,000	-18,450,000	-100%	$22.1M	—	—	—
Advent Capital Management	N/A	—	17,840,000	-17,840,000	-100%	$21.4M	—	—	—
DZ Bank AG Deutsche Zentral Genossenschafts Bank, Frankfurt am Main	N/A	—	12,150,000	-12,150,000	-100%	$14.6M	—	—	—
Oaktree Capital Management LP	N/A	—	9,146,000	-9,146,000	-100%	$11.0M	—	—	—
Balyasny Asset Management L.P.	N/A	—	8,500,000	-8,500,000	-100%	$10.2M	—	—	—
Lombard Odier Asset Management (Europe) Ltd	N/A	—	8,452,000	-8,452,000	-100%	$10.1M	—	—	—
Lord, Abbett & Co. LLC	N/A	—	7,265,000	-7,265,000	-100%	$8.7K	—	—	—
FMR LLC	N/A	—	7,140,000	-7,140,000	-100%	$8.5M	—	—	—
Citadel Advisors LLC	N/A	—	7,100,000	-7,100,000	-100%	$8.5M	—	—	—
SSI Investment Management LLC	N/A	—	6,587,000	-6,587,000	-100%	$7.9M	—	—	—
Shenkman Capital Management Inc	N/A	—	5,752,000	-5,752,000	-100%	$7.0M	—	—	—
Weiss Asset Management LP	N/A	—	5,000,000	-5,000,000	-100%	$6.0M	—	—	—
State of Wisconsin Investment Board	N/A	—	4,000,000	-4,000,000	-100%	$4.8M	—	—	—
Morgan Stanley	N/A	—	3,797,000	-3,797,000	-100%	$4.5M	—	—	—
Millennium Management LLC	N/A	—	3,125,000	-3,125,000	-100%	$3.8M	—	—	—
Amundi	N/A	—	3,100,000	-3,100,000	-100%	$3.7M	—	—	—
Toronto Dominion Bank	N/A	—	3,056,000	-3,056,000	-100%	$3.7M	—	—	—
Bank of America Corp	N/A	—	2,680,000	-2,680,000	-100%	$3.2M	—	—	—
Tenor Capital Management Co., L.P.	N/A	—	2,000,000	-2,000,000	-100%	$2.4M	—	—	—
Invesco Ltd.	N/A	—	2,000,000	-2,000,000	-100%	$2.4M	—	—	—
Man Group plc	N/A	—	1,805,000	-1,805,000	-100%	$2.1M	—	—	—
BNP Paribas Financial Markets	N/A	—	1,386,000	-1,386,000	-100%	$1.7M	—	—	—
Groupama Asset Managment	N/A	—	1,000,000	-1,000,000	-100%	$1.2M	—	—	—
Wells Fargo & Company	N/A	—	885,000	-885,000	-100%	$1.1M	—	—	—
Kohlberg Kravis Roberts & Co. L.P.	N/A	—	800,000	-800,000	-100%	$958.0K	—	—	—
SEI Investments Co	N/A	—	200,000	-200,000	-100%	$238.7K	—	—	—
Russell Investments Group, Ltd.	N/A	—	182,000	-182,000	-100%	$219.4K	—	—	—
UBS Group AG	N/A	—	152,000	-152,000	-100%	$181.4K	—	—	—
Ares Systematic Credit Ltd	N/A	—	100,000	-100,000	-100%	$119.7K	—	—	—
Loomis Sayles & Co L P	N/A	—	65,633	-65,633	-100%	$5.3M	—	—	—
Stephens Inc	N/A	—	33,000	-33,000	-100%	$39.4K	—	—	—
SG Americas Securities, LLC	N/A	—	29,150	-29,150	-100%	$3.5K	—	—	—
Adar1 Capital Management, LLC	N/A	—	10,000	-10,000	-100%	$1.2M	—	—	—

Showing 53 of 53 institutions