TNDM Insider Trading

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Insider Trading History
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About

Insider Ownership Percentage: 2.20%

Insider Buying (Last 12 Months): $203,312.24

Insider Selling (Last 12 Months): $858,400.00

Tandem Diabetes Care Insider Trading History Chart

Tandem Diabetes Care Share Price & Price History

^$18.90

▲ +1.009 (5.64%)

As of 03/12/2025 12:01 PM ET

Days: 30 | 90 | 365

Tandem Diabetes Care Insider Trading History

Transaction Date	Insider Name	Title	Buy/Sell	Number of Shares	Average Share Price	Total Transaction	Shares Held After Transaction
3/7/2025	Jean-Claude Kyrillos	COO	Buy	10,538	$18.12	$190,948.56	10,538
11/20/2024	Kim D. Blickenstaff	Director	Sell	10,000	$30.00	$300,000.00	195,190
11/20/2024	Kim D. Blickenstaff	Director	Sell	10,000	$30.00	$300,000.00	195,190
11/15/2024	Mark David Novara	EVP	Buy	532	$23.24	$12,363.68	532
5/30/2024	Dick Allen	Director	Sell	5,000	$51.68	$258,400.00	24,396
11/27/2023	Dick Allen	Director	Buy	5,000	$18.96	$94,800.00	19,962
11/8/2023	Leigh Vosseller	CFO	Buy	6,200	$15.39	$95,418.00	11,860
11/8/2023	Shannon Marie Hansen	Insider	Buy	1,935	$15.44	$29,876.40	1,935
9/15/2023	Kathleen McGroddy-Goetz	Director	Buy	1,000	$21.45	$21,450.00	9,032
5/18/2023	Dick Allen	Director	Buy	10,000	$29.47	$294,700.00	12,205
5/12/2023	Leigh Vosseller	CFO	Buy	3,015	$32.77	$98,801.55	5,660
3/3/2023	David B. Berger	COO	Sell	10,000	$41.19	$411,900.00	3,365
12/16/2022	David B. Berger	COO	Sell	10,000	$40.25	$402,500.00	3,029
6/8/2022	David B. Berger	COO	Sell	10,097	$65.02	$656,506.94	2,457
5/17/2022	Kim D. Blickenstaff	Director	Sell	10,762	$92.91	$999,897.42	205,190
5/9/2022	John F. Sheridan	CEO	Buy	2,500	$69.90	$174,750.00	10,058
5/9/2022	Leigh Vosseller	CFO	Buy	500	$70.00	$35,000.00	9,118
5/6/2022	Leigh Vosseller	CFO	Buy	2,000	$75.76	$151,520.00	8,618
5/5/2022	Christopher J Twomey	Director	Sell	248	$111.73	$27,709.04	5,112
5/2/2022	Rebecca B. Robertson	Director	Sell	1,500	$96.73	$145,095.00
3/16/2022	David B. Berger	COO	Sell	5,000	$108.37	$541,850.00
3/14/2022	Kathleen McGroddy-Goetz	Director	Sell	405	$106.00	$42,930.00

See Full Table

SEC Filings (Institutional Ownership Changes) for Tandem Diabetes Care (NASDAQ:TNDM)

Institutional Buying and Selling by Quarter

Tandem Diabetes Care Institutional Trading History

Reporting Date	Hedge Fund	Shares Held	Market Value	% of Portfolio	Quarterly Change in Shares	Ownership in Company
2/27/2025	Jefferies Financial Group Inc.	9,158	$0.33M	0.0%	-97.6%	0.014%
2/18/2025	Connective Capital Management LLC	16,960	$0.61M	0.7%	N/A	0.026%
2/17/2025	UBS AM a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC	177,739	$6.40M	0.0%	+20.4%	0.271%
2/17/2025	Two Sigma Advisers LP	881,783	$31.76M	0.1%	-2.2%	1.343%
2/17/2025	Two Sigma Investments LP	861,188	$31.02M	0.1%	+4.4%	1.311%
2/17/2025	State of Wyoming	2,996	$0.11M	0.0%	+95.9%	0.005%
2/17/2025	Shell Asset Management Co.	26,281	$0.95M	0.0%	+16.9%	0.040%
2/17/2025	Sherbrooke Park Advisers LLC	9,225	$0.33M	0.1%	N/A	0.014%
2/17/2025	Silvercrest Asset Management Group LLC	346,565	$12.48M	0.1%	+29.2%	0.528%
2/17/2025	Point72 Asia Singapore Pte. Ltd.	899	$32K	0.0%	-63.6%	0.001%
2/17/2025	Point72 Asset Management L.P.	495,311	$17.84M	0.0%	+105.8%	0.754%
2/17/2025	Polar Capital Holdings Plc	142,900	$5.15M	0.0%	-7.2%	0.218%
2/17/2025	ProShare Advisors LLC	19,789	$0.71M	0.0%	+42.5%	0.030%
2/17/2025	Quantinno Capital Management LP	51,612	$1.86M	0.0%	+65.7%	0.079%
2/17/2025	Nuveen Asset Management LLC	519,019	$18.70M	0.0%	+9.9%	0.790%
2/17/2025	MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.	72,317	$2.61M	0.0%	-9.5%	0.110%
2/17/2025	Moore Capital Management LP	20,998	$0.76M	0.0%	N/A	0.032%
2/17/2025	Jacobs Levy Equity Management Inc.	1,661,013	$59.83M	0.2%	+189.0%	2.529%
2/17/2025	Janus Henderson Group PLC	29,811	$1.07M	0.0%	-96.7%	0.045%
2/17/2025	Jefferies Financial Group Inc.	9,158	$0.33M	0.0%	-97.6%	0.014%
2/17/2025	Gotham Asset Management LLC	115,876	$4.17M	0.0%	-3.7%	0.176%
2/17/2025	Frontier Capital Management Co. LLC	272,088	$9.80M	0.1%	+50.4%	0.414%
2/17/2025	Fred Alger Management LLC	1,943,356	$70M	0.3%	-1.8%	2.959%
2/17/2025	Deutsche Bank AG	61,771	$2.23M	0.0%	+45.5%	0.094%
2/17/2025	DAFNA Capital Management LLC	223,208	$8.04M	2.0%	+9.3%	0.340%
2/17/2025	Divisadero Street Capital Management LP	360,232	$12.98M	1.5%	-69.8%	0.548%
2/17/2025	Cresset Asset Management LLC	7,644	$0.28M	0.0%	-75.7%	0.012%
2/17/2025	Cetera Investment Advisers	14,185	$0.51M	0.0%	+7.4%	0.022%
2/17/2025	Brevan Howard Capital Management LP	52,841	$1.90M	0.0%	+140.9%	0.080%
2/17/2025	Captrust Financial Advisors	18,513	$0.67M	0.0%	+82.0%	0.028%
2/17/2025	Brown Advisory Inc.	913,087	$32.89M	0.0%	N/A	1.390%
2/17/2025	Bellevue Group AG	782,456	$28.18M	0.5%	-57.7%	1.191%
2/17/2025	Bank of America Corp DE	317,706	$11.44M	0.0%	-28.7%	0.484%
2/17/2025	Beaconlight Capital LLC	331,209	$11.93M	4.4%	+53.6%	0.504%
2/17/2025	BNP Paribas Financial Markets	24,819	$0.89M	0.0%	-91.5%	0.038%
2/17/2025	Ameriprise Financial Inc.	345,681	$12.45M	0.0%	-60.3%	0.526%
2/17/2025	Algert Global LLC	89,536	$3.23M	0.1%	+141.3%	0.136%
2/17/2025	ArrowMark Colorado Holdings LLC	2,723,715	$98.11M	1.3%	+14.1%	4.147%
2/17/2025	4D Advisors LLC	200,000	$7.20M	5.0%	N/A	0.305%
2/14/2025	Freestone Grove Partners LP	181,124	$6.52M	0.1%	N/A	0.276%
2/14/2025	Park West Asset Management LLC	1,600,000	$57.63M	4.6%	+49.5%	2.436%
2/14/2025	First Light Asset Management LLC	292,117	$10.52M	1.0%	-71.5%	0.445%
2/14/2025	Northern Trust Corp	697,456	$25.12M	0.0%	+9.7%	1.062%
2/14/2025	The Manufacturers Life Insurance Company	35,031	$1.26M	0.0%	-0.9%	0.053%
2/14/2025	Tudor Investment Corp ET AL	169,043	$6.09M	0.0%	+314.8%	0.257%
2/14/2025	Aquatic Capital Management LLC	21,246	$0.77M	0.0%	-68.5%	0.032%
2/14/2025	Susquehanna Fundamental Investments LLC	51,703	$1.86M	0.0%	N/A	0.079%
2/14/2025	Gilder Gagnon Howe & Co. LLC	931,894	$33.57M	0.4%	+6.7%	1.419%
2/14/2025	Oberweis Asset Management Inc.	506,600	$18.25M	0.9%	+13.1%	0.771%
2/14/2025	Voya Investment Management LLC	98,179	$3.54M	0.0%	+231.9%	0.149%
2/14/2025	Hood River Capital Management LLC	1,278,047	$46.04M	0.7%	N/A	1.946%
2/14/2025	Price T Rowe Associates Inc. MD	50,740	$1.83M	0.0%	+12.3%	0.077%
2/14/2025	Hsbc Holdings PLC	27,779	$1.02M	0.0%	+109.2%	0.042%
2/14/2025	Stifel Financial Corp	34,773	$1.25M	0.0%	+2.1%	0.053%
2/14/2025	State of Tennessee Department of Treasury	29,836	$1.08M	0.0%	+4.4%	0.045%
2/14/2025	Tower Research Capital LLC TRC	3,902	$0.14M	0.0%	+102.7%	0.006%
2/14/2025	MetLife Investment Management LLC	39,688	$1.43M	0.0%	+6.1%	0.060%
2/14/2025	Capital World Investors	767,000	$27.63M	0.0%	-76.5%	1.168%
2/14/2025	First Trust Advisors LP	77,901	$2.81M	0.0%	-21.4%	0.119%
2/14/2025	Formula Growth Ltd.	125,965	$4.54M	1.5%	-1.7%	0.192%
2/14/2025	Commerce Bank	26,889	$0.97M	0.0%	+21.3%	0.041%
2/14/2025	Capital International Investors	718,038	$25.86M	0.0%	+12.5%	1.093%
2/13/2025	Champlain Investment Partners LLC	1,379,863	$49.70M	0.3%	-6.1%	2.101%
2/13/2025	Canada Pension Plan Investment Board	16,900	$0.61M	0.0%	+838.9%	0.026%
2/13/2025	Marshall Wace LLP	950,948	$34.25M	0.0%	+16.9%	1.448%
2/13/2025	Jump Financial LLC	37,710	$1.36M	0.0%	N/A	0.057%
2/13/2025	Bridgewater Associates LP	7,378	$0.27M	0.0%	-71.2%	0.011%
2/13/2025	Guggenheim Capital LLC	16,107	$0.58M	0.0%	+40.1%	0.025%
2/13/2025	XTX Topco Ltd	7,490	$0.27M	0.0%	+43.6%	0.011%
2/13/2025	Mariner LLC	16,881	$0.61M	0.0%	-1.9%	0.026%
2/13/2025	Barclays PLC	476,974	$17.18M	0.0%	+106.4%	0.726%
2/13/2025	Summit Investment Advisors Inc.	6,870	$0.25M	0.2%	+8.3%	0.010%
2/13/2025	Next Century Growth Investors LLC	201,839	$7.27M	0.5%	-79.5%	0.307%
2/13/2025	Kennedy Capital Management LLC	267,355	$9.63M	0.2%	+113.8%	0.407%
2/13/2025	Capital Fund Management S.A.	200,277	$7.21M	0.0%	+116.1%	0.305%
2/13/2025	Raymond James Financial Inc.	163,614	$5.89M	0.0%	N/A	0.249%
2/13/2025	Advisory Services Network LLC	6,054	$0.22M	0.0%	-12.9%	0.009%
2/13/2025	Renaissance Technologies LLC	315,727	$11.37M	0.0%	+50.0%	0.481%
2/13/2025	FIL Ltd	201,376	$7.25M	0.0%	+48.7%	0.307%
2/13/2025	Legal & General Group Plc	182,655	$6.58M	0.0%	-2.8%	0.278%
2/13/2025	Invesco Ltd.	204,890	$7.38M	0.0%	-35.5%	0.312%
2/13/2025	Bank of Montreal Can	10,004	$0.36M	0.0%	+4.3%	0.015%
2/13/2025	Cerity Partners LLC	57,476	$2.07M	0.0%	-8.5%	0.088%
2/13/2025	Quadrant Capital Group LLC	5,800	$0.21M	0.0%	-16.5%	0.009%
2/13/2025	Russell Investments Group Ltd.	290,228	$10.45M	0.0%	+36.5%	0.442%
2/13/2025	Envestnet Asset Management Inc.	254,063	$9.15M	0.0%	-4.4%	0.387%
2/13/2025	Wells Fargo & Company MN	61,255	$2.21M	0.0%	+35.8%	0.093%
2/13/2025	Integrated Quantitative Investments LLC	31,900	$1.15M	0.6%	N/A	0.049%
2/12/2025	Landscape Capital Management L.L.C.	19,635	$0.71M	0.1%	+44.9%	0.030%
2/12/2025	ExodusPoint Capital Management LP	254,057	$9.15M	0.1%	+331.6%	0.387%
2/12/2025	Trexquant Investment LP	211,206	$7.61M	0.1%	+53.8%	0.322%
2/12/2025	Geode Capital Management LLC	1,533,828	$55.26M	0.0%	+0.5%	2.335%
2/12/2025	B. Metzler seel. Sohn & Co. AG	21,870	$0.79M	0.0%	N/A	0.033%
2/12/2025	Alliancebernstein L.P.	93,807	$3.38M	0.0%	-30.2%	0.143%
2/12/2025	Orion Portfolio Solutions LLC	30,074	$1.08M	0.0%	-10.7%	0.046%
2/12/2025	JPMorgan Chase & Co.	392,586	$14.14M	0.0%	+98.7%	0.598%
2/11/2025	EntryPoint Capital LLC	8,167	$0.29M	0.1%	N/A	0.012%
2/11/2025	Prudential Financial Inc.	174,884	$6.30M	0.0%	+29.4%	0.266%
2/11/2025	Corebridge Financial Inc.	34,962	$1.26M	0.0%	-6.0%	0.053%
2/11/2025	Vanguard Group Inc.	7,440,005	$267.99M	0.0%	+1.1%	11.328%

Data available starting January 2016

See Full Table

Tandem Diabetes Care, Inc., a medical device company, designs, develops, and commercializes technology solutions for people living with diabetes in the United States and internationally. The company's flagship product is the t:slim X2 insulin delivery system, a pump platform for managing insulin delivery and display continuous glucose monitoring sensor information directly on the pump home screen; and Tandem Mobi insulin pump, an automated insulin delivery system. It also sells single-use products, including cartridges for storing and delivering insulin, and infusion sets that connect the insulin pump to the user's body. In addition, the company offers Tandem Device Updater used to update the pump software from a personal computer; Tandem Source, a web-based data management platform, which provides a visual way to display diabetes therapy management data from the pumps, integrated CGMs, and supported blood glucose meters; and Sugarmate, a mobile app used to help people visualize diabetes therapy data. The company was formerly known as Phluid Inc. and changed its name to Tandem Diabetes Care, Inc. in January 2008. Tandem Diabetes Care, Inc. was incorporated in 2006 and is headquartered in San Diego, California.

Today's Range

Now: $18.90

$18.03

$19.34

50 Day Range

MA: $32.43

$17.89

$37.53

52 Week Range

Now: $18.90

$17.64

$53.69

Volume

696,203 shs

Average Volume

1,470,901 shs

Market Capitalization

$1.26 billion

P/E Ratio

N/A

Dividend Yield

N/A

Beta

1.45

Who are the company insiders with the largest holdings of Tandem Diabetes Care?: Tandem Diabetes Care's top insider investors include:
Kim D Blickenstaff (Director)
Dick Allen (Director)
Leigh Vosseller (CFO)
Jean-Claude Kyrillos (COO)
Kathleen Mcgroddy-Goetz (Director)
Shannon Marie Hansen (Insider)
Mark David Novara (EVP)
Learn More about top insider investors at Tandem Diabetes Care.
Who are the major institutional investors of Tandem Diabetes Care?: Tandem Diabetes Care's top institutional investors include:
Vanguard Group Inc. — 11.33%
ArrowMark Colorado Holdings LLC — 4.15%
GW&K Investment Management LLC — 3.23%
Fred Alger Management LLC — 2.96%
Jacobs Levy Equity Management Inc. — 2.53%
Park West Asset Management LLC — 2.44%
Learn More about top institutional investors of Tandem Diabetes Care stock.
Which institutional investors are selling Tandem Diabetes Care stock?: In the last quarter, TNDM stock was sold by these institutional investors:
Capital World Investors
Bellevue Group AG
Janus Henderson Group PLC
Divisadero Street Capital Management LP
Next Century Growth Investors LLC
First Light Asset Management LLC
Ameriprise Financial Inc.
Jefferies Financial Group Inc.
In the last year, company insiders that have sold Tandem Diabetes Care company stock include:
Kim D Blickenstaff (Director)
Dick Allen (Director)
Learn More investors selling Tandem Diabetes Care stock.
Which institutional investors are buying Tandem Diabetes Care stock?: Within the last quarter, TNDM stock was acquired by institutional investors including:
Hood River Capital Management LLC
Jacobs Levy Equity Management Inc.
Brown Advisory Inc.
Park West Asset Management LLC
Baillie Gifford & Co.
ArrowMark Colorado Holdings LLC
GW&K Investment Management LLC
Stephens Investment Management Group LLC
In the last year, these company insiders have bought Tandem Diabetes Care stock:
Kim D Blickenstaff (Director)
Dick Allen (Director)
Leigh Vosseller (CFO)
Jean-Claude Kyrillos (COO)
Kathleen Mcgroddy-Goetz (Director)
Shannon Marie Hansen (Insider)
Learn More investors buying Tandem Diabetes Care stock.