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TNDM

Tandem Diabetes Care, Inc.Open

15.85−0.60 −3.65%USD

NasdaqGM · as of Oct 13, 10:18 ET · 15m delay

Open

16.20

Prev close

16.45

Day range

15.8016.47

52-week range

12.2629.65

Volume

205.13K0.10×

Mkt cap

1.10B

P/E ttm

—

Fwd P/E

99.71

EPS ttm

-0.9100

Div yield

0.00%

Earnings

Nov 5, 2026

From 52w high

−46.54%

Price Chart

Yahoo Finance · delayed

TNDMOct 13, 2026O 16.20H 16.47L 15.80C 15.85−0.60 (−3.65%)Vol 205.13K

SMA 5019.19
SMA 20019.22

1Y change +13.21% since Oct 10, 2025 close540 bars loadedTimes in America/New_YorkDraw from the left toolbar · click a drawing to edit · right-click for alerts and export

TNDM Tandem Diabetes Care, Inc. · Last Guard Finance

DES

Key Statistics

Yahoo Finance

Performance

1 week: −1.92%
1 month: −7.36%
3 months: +1.99%
6 months: −24.92%
Year to date: −27.89%
1 year: +14.28%

Valuation & ownership

Market cap: 1.10B
Enterprise value: 1.43B
P/E (ttm): —
Forward P/E: 99.71
PEG ratio: —
Price / book: 8.45
Price / sales (ttm): 1.06
EV / EBITDA: -57.04
EPS (ttm): -0.9100
EPS (forward): 0.1590
Beta (5y monthly): 1.66
Dividend yield: 0.00%
Payout ratio: 0.00%
Shares outstanding: 69.58M
Float: 63.76M
Short % of float: 25.73%
Short ratio (days): 6.36
Held by insiders: 1.17%
Held by institutions: 115.89%
Avg volume (3m): 2.01M
50-day average: 19.28
200-day average: 19.25
52-week change: +14.28%
S&P 500 52-week: +17.50%

Technicals (daily)

RSI (14): 39.0
vs 50-day SMA: −17.40%
vs 200-day SMA: −17.53%
50 / 200-day trend: ▼ 50 below 200
MACD vs signal: ▲ above
ATR (14) % of price: 6.19%
Realised vol (20d, ann.): 57.4%
From 52-week high: −46.54%
From 52-week low: +29.28%

ANR

Analyst Consensus

21 analysts

Consensus

Buy

2.00 on a 1 (strong buy) – 5 (sell) scale

Mean target

27.86

+75.75% implied

Low 18.00Median 26.00High 50.00

Recommendation trend

Now14 / 11 / 0
1m ago14 / 10 /

DES

About Tandem Diabetes Care, Inc.

Yahoo Finance profile

Tandem Diabetes Care, Inc. designs, develops, and commercializes technology solutions for people living with diabetes in the United States and internationally. It's flagship products are the t:slim X2 insulin delivery system; and Tandem Mobi insulin pump, an automated insulin delivery system. The company 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, it 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 Sugarmate, a mobile app used to help people visualize diabetes therapy data. The company has collaboration agreement with the University of Virginia Center for Diabetes Technology for research and development of fully automated closed-loop insulin delivery systems. 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.

Sector: Healthcare
Industry: Medical Devices
Employees: 2,500
Headquarters: San Diego, CA, United States
Website: tandemdiabetes.com
Officers: Mr. John F. Sheridan President, CEO & Director
Ms. Leigh A. Vosseller Executive VP, CFO & Treasurer

SEAS

Seasonality · TNDM

2013–2026 · monthly returns

Strongest month Aug +10.25%Weakest month Sep −6.39%Averages use completed years only. Past seasonality doesn't predict future returns.

Year	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Year
2026	-9.5	27.2	-24.2	1.9	-11.9	-12.3	29.2	12.9	-25.9	-2.8			−27.9%
2025	2.9	-40.3	-13.5	-12.1	17.6	-6.0	-16.4	-19.7	-3.0	15.3	50.1	4.6	−39.0%
2024	-22.9	16.8	33.0	3.6	39.6	-21.4	-8.2	17.6	-2.5	-26.0	-2.4	17.6	+21.8%
2023	-9.4	-12.0	13.2	-2.5	-34.3	-5.6	42.3	-21.6	-24.1	-16.7	17.0	46.1	−34.2%
2022	-21.5	-4.6	3.2	-17.0	-29.3	-13.2	11.9	-30.9	4.6	17.3	-25.1	6.9	−70.1%
2021	-3.2	3.6	-8.1	4.1	-7.1	14.1	11.6	3.2	6.4	14.2	-5.7	17.1	+57.3%
2020	27.6	-1.8	-13.8	24.0	4.2	19.0	5.6	7.9	0.7	-4.0	-13.9	1.9	+60.5%
2019	14.5	50.8	-3.2	-3.3	11.6	-5.9	-1.7	14.2	-18.6	4.4	12.1	-13.6	+57.0%
2018	17.8	13.7	57.0	53.8	83.9	56.9	25.2	65.8	-6.2	-12.2	-2.1	3.1	+1508.9%
2017	9.3	2.1	-50.0	-20.6	-16.6	0.6	-39.7	74.3	-13.1	-66.2	8.1	-11.6	−89.0%
2016	-23.7	-0.8	-2.6	27.8	-41.2	15.1	-12.1	7.5	7.4	-21.0	-59.5	-12.2	−81.8%
2015	-3.2	-4.8	7.9	5.8	-9.6	-10.2	15.8	-8.5	-23.3	3.0	13.7	14.5	−7.0%
2014	0.3	-0.4	-14.2	-20.5	-7.6	0.1	-23.2	13.3	-5.2	19.7	-12.0	-10.1	−50.7%
2013												17.1	+17.1%

INSD

Insider Activity · TNDM

Market-wide insider buying →Congress trades →SEC Form 4 filings via Yahoo Finance

Buys, 6 months

0 shares

Sells, 6 months

— shares

Net shares

Net change in insider shares

—

Date	Insider	Transaction	Shares	Value
Aug 13, 2026	Sheridan John FChief Executive Officer	—	15.9K	—
Aug 13, 2026	Carpenter RickChief Technology Officer	—	2.5K	—
Aug 13, 2026	Morrison Susan MOfficer	—	2.8K	—
Aug 13, 2026	Vosseller Leigh AChief Financial Officer	—	4.1K	—
Aug 13, 2026	Kyrillos Jean-ClaudeChief Operating Officer	—	1K	—
Aug 13, 2026	Gasser Elizabeth AnneOfficer	—	3K	—
Aug 13, 2026	Hansen Shannon MarieOfficer	—	3K	—
Jul 14, 2026	Kyrillos Jean-ClaudeChief Operating Officer	—	3.6K	—
Jun 1, 2026	Gasser Elizabeth AnneOfficer	Stock Gift at price 0.00 per share.	7.2K	—
May 20, 2026	Allen Dick PRetired	—	8.8K	—
May 20, 2026	Twomey Christopher JDirector	—	8.8K	—
May 20, 2026	Robertson Rebecca BDirector	—	8.8K	—
May 20, 2026	Howell-Koren Peyton R.Director	—	8.8K	—
May 20, 2026	Sodhi RajwantDirector	—	8.8K	—
May 20, 2026	Mcgroddy-Goetz KathleenDirector	—	8.8K	—
May 20, 2026	Cha MyoungilDirector	—	8.8K	—
May 20, 2026	Malagueira Joao Paulo FalcaoDirector	—	8.8K	—
May 14, 2026	Sheridan John FChief Executive Officer	Stock Award(Grant) at price 10.90 per share.	1.3K	$14.56K
May 14, 2026	Sheridan John FChief Executive Officer	—	51.2K	—
May 14, 2026	Carpenter RickChief Technology Officer	Stock Award(Grant) at price 10.90 per share.	1.3K	$14.56K

CONG

Congress Trades · TNDM

House and Senate reports since 2025

Members

2 last bought

Buys

~$24.0K

Sells

~$8.0K

Net

+$16.0K

est. bought − sold

Latest

Mar 3, 26

Gilbert Cisneros

Members who traded it

Member	Buys	Sells	Est. net	Last move
Gilbert Cisneros CA31	2		+$16.0K	Bought Mar 3, 26
Josh Gottheimer NJ05	1	1	+$0	Bought Sep 22, 25

Bought and sold by quarter (est.)

Members of Congress's TNDM trades, newest first
Traded	Member	Owner	Type	Amount	Filed	Report
Mar 3, 26	Gilbert Cisneros CA31	Self	Buy	$1,001 - $15,000	Apr 7, 26 (35d)	PDF
Sep 22, 25	Josh Gottheimer NJ05	Joint	Buy	$1,001 - $15,000	Oct 15, 25 (23d)	PDF
Mar 19, 25	Josh Gottheimer NJ05	Joint	Sell	$1,001 - $15,000	Apr 10, 25 (22d)	PDF
Mar 4, 25	Gilbert Cisneros CA31	Self	Buy	$1,001 - $15,000	Apr 7, 25 (34d)	PDF

From House and Senate STOCK Act reports. Members disclose trades, not holdings, as value ranges up to 45 days later, so amounts are estimates and “last move” is a hint at who still holds it, not a position. All recent congress trades

TNDM

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Price Chart

Key Statistics

Performance

Valuation & ownership

Technicals (daily)

Analyst Consensus

About Tandem Diabetes Care, Inc.

Seasonality · TNDM

Insider Activity · TNDM

Congress Trades · TNDM

Members who traded it

Bought and sold by quarter (est.)

Investors Holding TNDM

Investors Holding TNDM

Congress Trades · TNDM

Members who traded it

Bought and sold by quarter (est.)

Seasonality · TNDM

Insider Activity · TNDM

Key Statistics

Performance

Valuation & ownership

Technicals (daily)

Analyst Consensus

About Tandem Diabetes Care, Inc.

Financial Snapshot

Earnings & Dividends

News