TWO SIGMA INVESTMENTS, LP

Position in TNDM — Tandem Diabetes Care Inc

CIK 1179392 NEW YORK, NY

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Position in TNDM

as of Mar 31, 2026 · filed May 15, 2026 Compact

Position Value

$35,736,598

+$9,327,035 QoQ

Shares Held

1,864,194

+55.2% QoQ

Ownership

2.72%

of shares outstanding

% of Portfolio

0.03%

of 13F equity value

Holder Rank

—

not a current holder

Holding Since

Mar 2020

25 quarters on record

Voting authority Sole 98% Shared 0% None 2%

Common Shares in TNDM Over Time

Shares Held

Position Value (USD)

Derivatives in TNDM

reported options exposure · as of Dec 31, 2021

CallValue

$1,339,628

CallShares

8,900

PutValue

$677,340

PutShares

4,500

Notional value of option positions as reported on Form 13F. Calls and puts are disclosed separately and do not net against the common-share stake above.

Position in Medical Devices

Healthcare · as of Mar 31, 2026

TWO SIGMA INVESTMENTS, LP holds $2,221,263,395 across 63 Medical Devices names. TNDM ranks #9 (1.6% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	ABT	Abbott Laboratories	6,388,828	$655,940,970
2	BSX	Boston Scientific Corp	9,411,231	$590,554,745
3	PODD	Insulet Corp	762,349	$159,971,314
4	SYK	Stryker Corp	469,215	$154,179,356
5	STE	STERIS plc	479,146	$105,953,554
6	EW	Edwards Lifesciences Corp	1,051,535	$84,206,922
7	DXCM	Dexcom Inc	1,114,948	$70,018,734
8	MDT	Medtronic plc	605,568	$52,472,467

All Filings in TNDM

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38 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$35,736,598	1,864,194	+55.2%	Shares	Sole	2026-05-15
2025-12-31	$26,409,563	1,201,527	+7.5%	Shares	Sole	2026-02-17
2025-09-30	$13,562,832	1,117,202	-9.4%	Shares	Sole	2025-11-14
2025-06-30	$22,978,031	1,232,727	+92.2%	Shares	Sole	2025-08-14
2025-03-31	$12,290,028	641,442	-25.5%	Shares	Sole	2025-05-15
2024-12-31	$31,019,991	861,188	+4.4%	Shares	Sole	2025-02-14
2024-09-30	$34,976,078	824,713	-27.3%	Shares	Sole	2024-11-14
2024-06-30	$45,736,402	1,135,180	+11.1%	Shares	Sole	2024-08-14
2024-03-31	$36,188,772	1,021,993	+45.7%	Shares	Sole	2024-05-15
2023-12-31	$20,746,051	701,354	-10.1%	Shares	Sole	2024-02-14
2023-09-30	$16,211,691	780,534	-35.4%	Shares	Sole	2023-11-14
2023-06-30	$29,639,534	1,207,805	+30.9%	Shares	Sole	2023-08-14
2023-03-31	$37,462,034	922,483	+4.9%	Shares	Sole	2023-05-15
2022-12-31	$39,542,739	879,705	+32.3%	Shares	Sole	2023-02-14
2022-09-30	$31,809,818	664,782	+26.8%	Shares	Sole	2022-11-14
2022-06-30	$31,030,298	524,249	+1258.8%	Shares	Sole	2022-08-15
2022-03-31	$4,486,700	38,582	+757.4%	Shares	Sole	2022-05-16
2021-12-31	$677,340	4,500	-49.4%	Put	Sole	2022-02-14
2021-12-31	$1,339,628	8,900	+122.5%	Call	Sole	2022-02-14
2021-09-30	$477,520	4,000	-37.5%	Call	Sole	2021-11-15
2021-09-30	$764,032	6,400	-96.1%	Put	Sole	2021-11-15
2021-06-30	$16,172,393	166,041	+773.9%	Shares	Sole	2021-08-16
2021-06-30	$1,850,600	19,000	+35.7%	Put	Sole	2021-08-16
2021-06-30	$1,363,600	14,000	+42.9%	Call	Sole	2021-08-16
2021-03-31	$864,850	9,800	-97.5%	Put	Sole	2021-05-17
2021-03-31	$34,826,627	394,636	+3216.3%	Shares	Sole	2021-05-17
2021-03-31	$1,050,175	11,900	-73.2%	Call	Sole	2021-05-17
2020-12-31	$4,248,192	44,400	+17.8%	Put	Sole	2021-02-16
2020-12-31	$3,607,136	37,700	+4.4%	Call	Sole	2021-02-16
2020-09-30	$4,097,350	36,100	+6.2%	Call	Sole	2020-11-16
2020-09-30	$3,859,000	34,000	-85.0%	Put	Sole	2020-11-16
2020-09-30	$25,691,860	226,360	+867.4%	Shares	Sole	2020-11-16
2020-06-30	$2,314,728	23,400	+43.6%	Put	Sole	2020-08-14
2020-06-30	$1,612,396	16,300	-68.2%	Call	Sole	2020-08-14
2020-06-30	$5,062,626	51,179	+239.5%	Shares	Sole	2020-08-14
2020-03-31	$969,947	15,073	-57.3%	Shares	Sole	2020-05-15
2020-03-31	$2,271,555	35,300	+31.2%	Put	Sole	2020-05-15
2020-03-31	$1,731,015	26,900	—	Call	Sole	2020-05-15
No filing history on record for this holder in this stock.