Leigh Vosseller

TNDM

Leigh Vosseller serves as EVP & CHIEF FINANCIAL OFFICER at Tandem Diabetes Care, Inc. (TNDM). This page tracks their complete SEC Form 4 insider trading history including stock purchases and sales.

Total Buys

4 trades

$530.1K

Total Sells

5 trades

$6.53M

Net Position

Net Seller

$6.00M

Companies Traded

TNDM

Active Period

Sep 2021 – Feb 2026

9 total trades

Most Recent

Sell TNDM

Feb 17, 2026 · $23.4K

Leigh Vosseller's Insider Trading at Tandem Diabetes Care, Inc. (TNDM)

Buys

4 · $530.1K

Sells

5 · $6.53M

Total Shares Bought

25,435

Total Shares Sold

51,235

TNDM Price Chart

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Date	Type	Shares	Avg Price	Value	Shares After
Feb 17, 2026	Sell	1,235	$18.95	$23.4K	0
Aug 11, 2025	Buy	13,720	$10.89	$149.4K	25,580
Nov 13, 2023	Buy	6,200	$15.39	$95.4K	11,860
May 16, 2023	Buy	3,015	$32.77	$98.8K	5,660
May 10, 2022	Buy	2,500	$74.61	$186.5K	9,118
Nov 5, 2021	Sell	10,000	$140.05	$1.40M	6,145
Oct 14, 2021	Sell	20,000	$132.55	$2.65M	6,145
Sep 17, 2021	Sell	10,000	$125.00	$1.25M	6,145
Sep 15, 2021	Sell	10,000	$120.75	$1.21M	9,445