Tandem Diabetes Care Inc

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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Calamos Advisors LLC

UNCHANGED

Shares8,550,000 from 8,550,000

Change0 (0%)

Value$8.2M (+$44.0K)

Filed 2026-11-02

Citigroup Inc

DECREASED

Shares5,020,000 from 5,263,000

Change-243,000 (-5%)

Value$4.8M (-$146.3K)

Filed 2026-11-04

Bank of New York Mellon Corp

UNCHANGED

Shares250,000 from 250,000

Change0 (0%)

Value$240.5K (+$2.4K)

Filed 2026-11-05

Oppenheimer Asset Management Inc.

NEW

Shares16,000

Change+16,000

Value$15.4K

Filed 2026-10-27

Context Capital Management, LLC

CLOSED

Shares0 from 20,000,000

Change-20,000,000 (-100%)

Value$0 (-$19.0M)

Filed 2026-11-04

Jefferies Financial Group Inc.

CLOSED

Shares0 from 1,100,000

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

Value$0 (-$1.0M)

Filed 2026-11-05

Wealth Enhancement Advisory Services, LLC

CLOSED

Shares0 from 15,000

Change-15,000 (-100%)

Value$0 (-$14.3K)

Filed 2026-10-13

Linden Advisors LP

N/A

Shares— from 74,791,000

Change-74,791,000 (-100%)

Value—

Bank of Montreal

N/A

Shares— from 42,039,000

Change-42,039,000 (-100%)

Value—

Opti Capital Management, LP

N/A

Shares— from 27,500,000

Change-27,500,000 (-100%)

Value—

Balyasny Asset Management L.P.

N/A

Shares— from 25,000,000

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

Value—

Empyrean Capital Partners, LP

N/A

Shares— from 18,500,000

Change-18,500,000 (-100%)

Value—

DeepCurrents Investment Group LLC

N/A

Shares— from 17,804,000

Change-17,804,000 (-100%)

Value—

Fort Baker Capital Management LP

N/A

Shares— from 15,000,000

Change-15,000,000 (-100%)

Value—

Goldman Sachs Group Inc

N/A

Shares— from 10,443,000

Change-10,443,000 (-100%)

Value—

Jump Financial, LLC

N/A

Shares— from 8,312,000

Change-8,312,000 (-100%)

Value—

BlackRock, Inc.

N/A

Shares— from 7,025,000

Change-7,025,000 (-100%)

Value—

Advent Capital Management

N/A

Shares— from 6,196,000

Change-6,196,000 (-100%)

Value—

Aristeia Capital, L.L.C.

N/A

Shares— from 6,000,000

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

Value—

FMR LLC

N/A

Shares— from 3,786,000

Change-3,786,000 (-100%)

Value—

Walleye Capital LLC

N/A

Shares— from 3,500,000

Change-3,500,000 (-100%)

Value—

Lazard Asset Management LLC

N/A

Shares— from 2,533,000

Change-2,533,000 (-100%)

Value—

Tenor Capital Management Co., L.P.

N/A

Shares— from 2,500,000

Change-2,500,000 (-100%)

Value—

Capstone Investment Advisors, LLC

N/A

Shares— from 2,500,000

Change-2,500,000 (-100%)

Value—

CSS LLC

N/A

Shares— from 2,500,000

Change-2,500,000 (-100%)

Value—

Zazove Associates LLC

N/A

Shares— from 2,500,000

Change-2,500,000 (-100%)

Value—

Hurricane Capital Advisors LLC

N/A

Shares— from 500,000

Change-500,000 (-100%)

Value—

SG Americas Securities, LLC

N/A

Shares— from 25,000

Change-25,000 (-100%)

Value—

Insigneo Advisory Services, LLC

N/A

Shares— from 17,000

Change-17,000 (-100%)

Value—

Royal Bank of Canada

N/A

Shares— from 7,000

Change-7,000 (-100%)

Value—

BNP Paribas Financial Markets

N/A

Shares— from 2,000

Change-2,000 (-100%)

Value—

	Status
Calamos Advisors LLC	UNCHANGED	8,550,000	8,550,000	0	0%	$8.2M	$8.2M	+$44.0K	2026-11-02
Citigroup Inc	DECREASED	5,020,000	5,263,000	-243,000	-5%	$5.0M	$4.8M	-$146.3K	2026-11-04
Bank of New York Mellon Corp	UNCHANGED	250,000	250,000	0	0%	$238.1K	$240.5K	+$2.4K	2026-11-05
Oppenheimer Asset Management Inc.	NEW	16,000	—	+16,000	—	—	$15.4K	—	2026-10-27
Context Capital Management, LLC	CLOSED	0	20,000,000	-20,000,000	-100%	$19.0M	$0	-$19.0M	2026-11-04
Jefferies Financial Group Inc.	CLOSED	0	1,100,000	-1,100,000	-100%	$1.0M	$0	-$1.0M	2026-11-05
Wealth Enhancement Advisory Services, LLC	CLOSED	0	15,000	-15,000	-100%	$14.3K	$0	-$14.3K	2026-10-13
Linden Advisors LP	N/A	—	74,791,000	-74,791,000	-100%	$71.2M	—	—	—
Bank of Montreal	N/A	—	42,039,000	-42,039,000	-100%	$40.0M	—	—	—
Opti Capital Management, LP	N/A	—	27,500,000	-27,500,000	-100%	$26.4M	—	—	—
Balyasny Asset Management L.P.	N/A	—	25,000,000	-25,000,000	-100%	$23.9M	—	—	—
Empyrean Capital Partners, LP	N/A	—	18,500,000	-18,500,000	-100%	$17.7M	—	—	—
DeepCurrents Investment Group LLC	N/A	—	17,804,000	-17,804,000	-100%	$16.9M	—	—	—
Fort Baker Capital Management LP	N/A	—	15,000,000	-15,000,000	-100%	$14.4M	—	—	—
Goldman Sachs Group Inc	N/A	—	10,443,000	-10,443,000	-100%	$9.9M	—	—	—
Jump Financial, LLC	N/A	—	8,312,000	-8,312,000	-100%	$7.9M	—	—	—
BlackRock, Inc.	N/A	—	7,025,000	-7,025,000	-100%	$6.6M	—	—	—
Advent Capital Management	N/A	—	6,196,000	-6,196,000	-100%	$5.9M	—	—	—
Aristeia Capital, L.L.C.	N/A	—	6,000,000	-6,000,000	-100%	$5.7M	—	—	—
FMR LLC	N/A	—	3,786,000	-3,786,000	-100%	$3.6M	—	—	—
Walleye Capital LLC	N/A	—	3,500,000	-3,500,000	-100%	$3.3M	—	—	—
Lazard Asset Management LLC	N/A	—	2,533,000	-2,533,000	-100%	$24.1K	—	—	—
Tenor Capital Management Co., L.P.	N/A	—	2,500,000	-2,500,000	-100%	$2.4M	—	—	—
Capstone Investment Advisors, LLC	N/A	—	2,500,000	-2,500,000	-100%	$2.4M	—	—	—
CSS LLC	N/A	—	2,500,000	-2,500,000	-100%	$2.4M	—	—	—
Zazove Associates LLC	N/A	—	2,500,000	-2,500,000	-100%	$2.4M	—	—	—
Hurricane Capital Advisors LLC	N/A	—	500,000	-500,000	-100%	$481.3K	—	—	—
SG Americas Securities, LLC	N/A	—	25,000	-25,000	-100%	$2.4K	—	—	—
Insigneo Advisory Services, LLC	N/A	—	17,000	-17,000	-100%	$16.1K	—	—	—
Royal Bank of Canada	N/A	—	7,000	-7,000	-100%	$7.0K	—	—	—
BNP Paribas Financial Markets	N/A	—	2,000	-2,000	-100%	$1.9K	—	—	—

Showing 31 of 31 institutions