Ken Griffin Tandem Diabetes Care Inc Transaction History

Citadel Advisors LLC

$550 Billion
Q2 2025

A detailed history of Ken Griffin (Citadel Advisors LLC) transactions in Tandem Diabetes Care Inc stock. As of the latest transaction made, Citadel Advisors LLC holds 352,959 shares of TNDM stock, worth $3.92 Million. This represents 0.0% of its overall portfolio holdings.

Number of Shares

352,959

Previous 22,000 1504.36%

Holding current value

$3.92 Million

Previous $421,000 1462.71%

% of portfolio

0.0%

Previous 0.0%

29 transactions

Quarter	Operation	Price Per share	shares change	shares Held
Q2 2025 Aug 14, 2025	BUY	$16.35 - $23.52 $3.91 Million - $5.62 Million	238,925 Added 209.52%	352,959 $6.58 Million
Q1 2025 May 15, 2025	SELL	$17.89 - $37.53 $318,298 - $667,733	-17,792 Reduced 13.5%	114,034 $2.18 Million
Q4 2024 Feb 14, 2025	SELL	$27.34 - $41.78 $5.91 Million - $9.02 Million	-215,997 Reduced 62.1%	131,826 $4.75 Million
Q3 2024 Nov 14, 2024	SELL	$35.21 - $47.3 $51.4 Million - $69.1 Million	-1,460,918 Reduced 80.77%	347,823 $14.7 Million
Q2 2024 Aug 14, 2024	BUY	$30.43 - $53.43 $37.8 Million - $66.3 Million	1,241,673 Added 218.96%	1,808,741 $72.9 Million
Q1 2024 May 15, 2024	BUY	$22.09 - $35.41 $4.56 Million - $7.31 Million	206,355 Added 57.21%	567,068 $20.1 Million
Q4 2023 Feb 14, 2024	SELL	$14.28 - $31.03 $4.06 Million - $8.83 Million	-284,651 Reduced 44.11%	360,713 $10.7 Million
Q3 2023 Nov 14, 2023	BUY	$19.33 - $36.22 $9.17 Million - $17.2 Million	474,239 Added 277.13%	645,364 $13.4 Million
Q2 2023 Aug 14, 2023	SELL	$24.18 - $42.46 $215,927 - $379,167	-8,930 Reduced 4.96%	171,125 $4.2 Million
Q1 2023 May 15, 2023	SELL	$35.86 - $46.5 $3.1 Million - $4.03 Million	-86,564 Reduced 32.47%	180,055 $7.31 Million
Q4 2022 Feb 14, 2023	SELL	$35.49 - $56.15 $1.53 Million - $2.42 Million	-43,187 Reduced 13.94%	266,619 $12 Million
Q3 2022 Nov 14, 2022	BUY	$43.76 - $68.97 $11.6 Million - $18.2 Million	264,506 Added 583.9%	309,806 $14.8 Million
Q2 2022 Aug 15, 2022	SELL	$53.22 - $123.09 $24.9 Million - $57.7 Million	-468,688 Reduced 91.19%	45,300 $2.68 Million
Q1 2022 May 16, 2022	SELL	$101.89 - $150.09 $30 Million - $44.1 Million	-294,141 Reduced 36.4%	513,988 $59.8 Million
Q4 2021 Feb 14, 2022	BUY	$118.18 - $153.21 $69.1 Million - $89.6 Million	585,013 Added 262.2%	808,129 $122 Million
Q3 2021 Nov 15, 2021	SELL	$93.51 - $129.4 $16.3 Million - $22.6 Million	-174,268 Reduced 43.85%	223,116 $26.6 Million
Q2 2021 Aug 16, 2021	SELL	$77.0 - $100.19 $19.5 Million - $25.4 Million	-253,100 Reduced 38.91%	397,384 $38.7 Million
Q1 2021 May 17, 2021	BUY	$81.28 - $104.34 $36.3 Million - $46.6 Million	446,808 Added 219.37%	650,484 $57.4 Million
Q4 2020 Feb 16, 2021	BUY	$86.4 - $121.75 $993,859 - $1.4 Million	11,503 Added 5.99%	203,676 $19.5 Million
Q3 2020 Nov 16, 2020	BUY	$95.43 - $116.09 $13.1 Million - $16 Million	137,688 Added 252.71%	192,173 $21.8 Million
Q2 2020 Aug 14, 2020	BUY	$60.05 - $98.92 $231,612 - $381,534	3,857 Added 7.62%	54,485 $5.39 Million
Q1 2020 May 15, 2020	SELL	$47.37 - $90.04 $10.9 Million - $20.7 Million	-229,565 Reduced 81.93%	50,628 $3.26 Million
Q4 2019 Feb 14, 2020	SELL	$53.13 - $71.19 $16 Million - $21.5 Million	-301,858 Reduced 51.86%	280,193 $16.7 Million
Q3 2019 Nov 14, 2019	BUY	$57.11 - $73.3 $12.6 Million - $16.2 Million	220,486 Added 60.98%	582,051 $34.3 Million
Q2 2019 Aug 14, 2019	BUY	$54.41 - $71.7 $12.1 Million - $15.9 Million	221,726 Added 158.56%	361,565 $23.3 Million
Q1 2019 May 15, 2019	BUY	$32.25 - $73.56 $604,010 - $1.38 Million	18,729 Added 15.46%	139,839 $0
Q4 2018 Feb 14, 2019	SELL	$28.45 - $40.65 $5.65 Million - $8.07 Million	-198,596 Reduced 62.12%	121,110 $4.6 Million
Q3 2018 Nov 13, 2018	BUY	$21.39 - $51.17 $2.89 Million - $6.9 Million	134,942 Added 73.03%	319,706 $0
Q2 2018 Aug 10, 2018	BUY	$4.9 - $23.64 $905,343 - $4.37 Million	184,764 New	184,764 $0

Others Institutions Holding TNDM

# of Institutions

301

Shares Held

81M

Call Options Held

2.87M

Put Options Held

134K

View Full List

About TANDEM DIABETES CARE INC

Ticker TNDM
Exchange NASDAQ
Sector Healthcare
Industry Medical Devices
Shares Outstandng 64,221,200
Market Cap $713M
Description
Tandem Diabetes Care, Inc., a medical device company, designs, develops, and commercializes various products for people with insulin-dependent diabetes in the United States and internationally. The company's flagship product is the t:slim X2 insulin delivery system, a pump platform that comprises t:slim X2 pump, its 300-unit disposable insulin c...

More about TNDM

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