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CIK 0001438133 · Large accelerated filer

TANDEM DIABETES CARE INC

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Ticker
TNDM
Exchange
Nasdaq
Industry
Surgical & Medical Instruments & Apparatus
FY end
Dec 31
Incorporated
DE
Entity type
operating
EIN
204327508
Phone
858-366-6900
Business address
12400 HIGH BLUFF DRIVE, San Diego, CA, 92130
Open-market buys, last 90 days
$0
in 0 filings
Open-market sales, last 90 days
$32,555
in 1 filing, $33K under 10b5-1 plans

Net −$32,555. Shares bought or sold at a price by officers, directors and 10% owners (Form 4 codes P and S). Grants, option exercises and tax withholding aren't counted.

Pace of trading Bought Sold

Who's trading

90 days

  1. TWOMEY CHRISTOPHER J −$33K Director sold 7% of stake

Reading 100 more Form 4s from the SEC; this list fills in as they're read.

Date Insider Transaction Shares Price Value Owned after
2025-08-15 Sheridan John F PRESIDENT & CEO Option exercise +5,982 115,001
2025-08-15 Sheridan John F PRESIDENT & CEO Shares withheld for taxes −3,038 $10.82 $33K 111,963
2025-08-15 Sheridan John F PRESIDENT & CEO Option exercise · Restricted Stock Unit −5,471 16,415
2025-08-15 Sheridan John F PRESIDENT & CEO Option exercise · Restricted Stock Unit −5,982 41,876
2025-08-15 Carpenter Rick Chief Technology Officer Option exercise +1,437 22,656
2025-08-15 Carpenter Rick Chief Technology Officer Shares withheld for taxes −730 $10.82 $8K 21,926
2025-08-15 Carpenter Rick Chief Technology Officer Option exercise +898 22,824
2025-08-15 Carpenter Rick Chief Technology Officer Shares withheld for taxes −457 $10.82 $5K 22,367
2025-08-15 Carpenter Rick Chief Technology Officer Option exercise · Restricted Stock Unit −1,437 4,311
2025-08-15 Carpenter Rick Chief Technology Officer Option exercise · Restricted Stock Unit −898 6,281
2025-08-15 Vosseller Leigh EVP & CHIEF FINANCIAL OFFICER Option exercise +1,503 35,301
2025-08-15 Vosseller Leigh EVP & CHIEF FINANCIAL OFFICER Shares withheld for taxes −538 $10.82 $6K 34,763
2025-08-15 Vosseller Leigh EVP & CHIEF FINANCIAL OFFICER Option exercise +1,495 36,258
2025-08-15 Vosseller Leigh EVP & CHIEF FINANCIAL OFFICER Shares withheld for taxes −535 $10.82 $6K 35,723
2025-08-15 Vosseller Leigh EVP & CHIEF FINANCIAL OFFICER Option exercise · Restricted Stock Unit −1,503 4,509
2025-08-15 Vosseller Leigh EVP & CHIEF FINANCIAL OFFICER Option exercise · Restricted Stock Unit −1,495 10,469
2025-08-15 Hansen Shannon Marie EVP & Chief Legal Officer Option exercise +531 17,273
2025-08-15 Hansen Shannon Marie EVP & Chief Legal Officer Shares withheld for taxes −190 $10.82 $2K 17,083
2025-08-15 Hansen Shannon Marie EVP & Chief Legal Officer Option exercise +1,437 18,520
2025-08-15 Hansen Shannon Marie EVP & Chief Legal Officer Shares withheld for taxes −515 $10.82 $6K 18,005

Page 15 of 22 · 432 trades