NASDAQ:TNDM

Tandem Diabetes Care Stock Insider Trading

Healthcare > Medical - Devices

Buy TNDM

*Your capital is at risk

$18.03

-0.570 (-3.06%)

At Close: Jun 03, 2026

Tandem Diabetes Care Stock Insider Power

Based on the 100 latest insides trades, we have calculated the insider power to be positive at 89.18. In total, the insiders bought 862.46K and sold 57.02K TNDM shares in the last 100 trades. The insider score can be negative despite buy/sell ratio being positive. The score focuses on the quality of the trades.

Insider Power (Last 100 transactions)	89.18
● Buy	862.46K shares
● Sell	57.02K shares
80% Buy Activity Moderate Negative Correlation
Buy Signal High Confidence May 29, 2026 Analysis Breakdown: Strongly supported by a very high Insider Power Score of 89.18. Confidence increased due to high data reliability score of 100. Supported by overwhelming buy-side pressure (80% buys).

Historical Insider Trades

Date	Type	Person	Role	Amount
May 29, 2026 Buy	Restricted Stock Unit A-Award	Gasser Elizabeth Anne EVP, Chief Strategy Officer	Officer	29 136 Value: $501.1K
May 29, 2026 Buy	Restricted Stock Unit A-Award	Morrison Susan EVP & Chief Admin. Officer	Officer	29 136 Value: $501.1K
May 29, 2026 Buy	Restricted Stock Unit A-Award	Hansen Shannon Marie EVP & Chief Legal Officer	Officer	29 136 Value: $501.1K
May 29, 2026 Buy	Restricted Stock Unit A-Award	Kyrillos Jean-claude EVP & Chief Operating Officer	C-Suite Officer	29 136 Value: $501.1K
May 29, 2026 Buy	Restricted Stock Unit A-Award	Carpenter Rick EVP & Chief Technology Officer	Officer	26 003 Value: $447.3K
May 29, 2026 Buy	Restricted Stock Unit A-Award	Sheridan John F President & CEO	CEO / President	191 103 Value: $3.29M
May 29, 2026 Buy	Restricted Stock Unit A-Award	Vosseller Leigh EVP & Chief Financial Officer	C-Suite Officer	62 657 Value: $1.08M
May 21, 2026 Buy	Common Stock M-Exempt	Allen Dick Chair Emeritus	Other	8 759 Value: $138.0K
May 21, 2026 Buy	Restricted Stock Unit M-Exempt	Allen Dick Chair Emeritus	Other	8 759 Value: $138.0K
May 21, 2026 Buy	Common Stock M-Exempt	Howell Peyton R Director	Director	8 759 Value: $138.0K
May 21, 2026 Buy	Restricted Stock Unit M-Exempt	Howell Peyton R Director	Director	8 759 Value: $138.0K
May 21, 2026 Buy	Common Stock M-Exempt	Malagueira Joao Paulo Falcao Director	Director	8 759 Value: $138.0K
May 21, 2026 Buy	Common Stock M-Exempt	Sodhi Rajwant Director	Director	8 759 Value: $138.0K
May 21, 2026 Buy	Restricted Stock Unit M-Exempt	Sodhi Rajwant Director	Director	8 759 Value: $138.0K
May 21, 2026 Buy	Restricted Stock Unit M-Exempt	Mcgroddy-goetz Kathleen Director	Director	8 759 Value: $138.0K
May 21, 2026 Buy	Common Stock M-Exempt	Cha Myoungil Director	Director	8 759 Value: $138.0K
May 21, 2026 Buy	Restricted Stock Unit M-Exempt	Cha Myoungil Director	Director	8 759 Value: $138.0K
May 21, 2026 Buy	Restricted Stock Unit M-Exempt	Twomey Christopher J Director	Director	8 759 Value: $138.0K
May 21, 2026 Buy	Common Stock M-Exempt	Twomey Christopher J Director	Director	8 759 Value: $138.0K
May 21, 2026 Buy	Restricted Stock Unit M-Exempt	Robertson Rebecca B Director	Director	8 759 Value: $138.0K
May 21, 2026 Buy	Common Stock M-Exempt	Robertson Rebecca B Director	Director	8 759 Value: $138.0K
May 21, 2026 Buy	Common Stock M-Exempt	Mcgroddy-goetz Kathleen Director	Director	8 759 Value: $138.0K
May 21, 2026 Buy	Restricted Stock Unit M-Exempt	Malagueira Joao Paulo Falcao Director	Director	8 759 Value: $138.0K
May 20, 2026 Buy	Restricted Stock Unit A-Award	Allen Dick Chair Emeritus	Other	10 220 Value: $153.7K
May 20, 2026 Buy	Restricted Stock Unit A-Award	Howell Peyton R Director	Director	10 220 Value: $153.7K

About Insider Power

Insider Power is a proprietary algorithm developed by StockInvest.us to evaluate the significance of insider transactions. The calculation considers the size, type, and timing of transactions, as well as the insider’s role within the company.

It is important to note that, in general, there is little to no correlation between insider transactions and short-term stock price movements. In one of our studies, only 0.22%^* of stocks with insider activity showed a measurable correlation — and even then, it was unclear whether the effect was caused by insider actions or simply by the stock’s broader trend.

While our algorithms are designed to highlight potentially meaningful signals, these cannot be regarded as statistically significant on their own. Insider trading activity should therefore be seen as informative rather than as direct trading guidance. The Insider Power metric was created to present this information in a clearer and more accessible way, helping investors better understand the possible context of insider activity.

* October 6th, 2025 - Tested on 5562 stocks

ABOUT TANDEM DIABETES CARE

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 cartridge, and an infusion set. It also provides t:slim X2 insulin with Basal-IQ and control IQ technolo...

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