Insider trading

Period: 120 months Stock: TNDM Role: CFO × + Add filter Clear all
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When

Period

How far back the list reaches. Filings arrive days after the trade, so the newest rows always lag a little.

24 decisions over 120 months
Who

Role

The position the person holds at the company, read from the title on the filing. A chief executive who is also a director counts as the chief executive.

24 decisions over 120 months Remove this filter
The trade

Type of trade

Purchases, sales, or cluster buys: companies where 3 or more insiders bought within 30 days. The number beside each is what that choice would give.

24 decisions over 120 months
The trade

Minimum amount

Hides rows under this value. The amount is the shares traded times the price on the filing.

24 decisions over 120 months
The trade

Plan

  • Discretionary: they chose to sell that week.
  • Scheduled: a 10b5-1 plan fixed the sale months in advance, so the timing says nothing about what they knew.
  • Not stated: filed before the SEC added the box in April 2023, which is most of the older half of this database.
24 decisions over 120 months
The trade

Share of their own holding

How much of what they already held the trade moved. Selling a tenth of a stake is not the same act as selling all of it.

At least
24 decisions over 120 months
Ownership

What the chief executive holds

The value of the chief executive’s stock measured against base salary. The salary comes from the company’s own proxy. Companies with no figure are in neither direction.

24 decisions over 120 months
Stock
Insider
Type ?
Why it stands out
8 Aug 2025
Vosseller Leigh EVP & CHIEF FINANCIAL OFFICER · indirect
Bought
$149.40K 13,720 at 10.89
116%
Largest buy in 3 yrs
8 Nov 2023
Vosseller Leigh EVP & CHIEF FINANCIAL OFFICER · indirect
Bought
$95.40K 6,200 at 15.39
110%
+110% of stake
12 May 2023
Vosseller Leigh EVP & CHIEF FINANCIAL OFFICER · indirect
Bought
$98.81K 3,015 at 32.77
114%
+114% of stake
9 May 2022
Vosseller Leigh EVP & CHIEF FINANCIAL OFFICER
Bought
$35.00K 500 at 70.00
5.8%
6 May 2022
Vosseller Leigh EVP & CHIEF FINANCIAL OFFICER
Bought 2×
$151.53K 2,000 at 75.76
30.2%
First buy on file
3 Nov 2021
Vosseller Leigh EVP & CHIEF FINANCIAL OFFICER
Sold, plan not stated
$1.40M 10,000 at 140.05
61.9%
Sold half or more
14 Oct 2021
Vosseller Leigh EVP & CHIEF FINANCIAL OFFICER
Sold, plan not stated
$1.35M 10,000 at 135.09
61.9%
Sold half or more
12 Oct 2021
Vosseller Leigh EVP & CHIEF FINANCIAL OFFICER
Sold, plan not stated
$1.30M 10,000 at 130.00
61.9%
Sold half or more
16 Sep 2021
Vosseller Leigh EVP & CHIEF FINANCIAL OFFICER
Sold, plan not stated
$812.50K 6,500 at 125.00
51.4%
Sold half or more
15 Sep 2021
Vosseller Leigh EVP & CHIEF FINANCIAL OFFICER
Sold, plan not stated
$437.50K 3,500 at 125.00
36.3%
13 Sep 2021
Vosseller Leigh EVP & CHIEF FINANCIAL OFFICER
Sold, plan not stated 3×
$1.21M 10,000 at 120.75
61.9%
Sold half or more
13 Oct 2020
Vosseller Leigh EVP & CHIEF FINANCIAL OFFICER
Sold, plan not stated 3×
$1.21M 10,000 at 120.87
68.9%
Sold half or more
31 Jul 2020
Vosseller Leigh EVP & CHIEF FINANCIAL OFFICER
Sold, plan not stated
$1.10M 10,000 at 110.03
68.9%
Sold half or more
6 Jul 2020
Vosseller Leigh EVP & CHIEF FINANCIAL OFFICER
Sold, plan not stated
$1.05M 10,000 at 105.04
68.9%
Sold half or more
2 Jul 2020
Vosseller Leigh EVP & CHIEF FINANCIAL OFFICER
Sold, plan not stated 2×
$1.00M 10,000 at 100.44
68.9%
Sold half or more
30 Jun 2020
Vosseller Leigh EVP & CHIEF FINANCIAL OFFICER
Sold, plan not stated
$950.39K 10,000 at 95.04
68.9%
Sold half or more
7 May 2020
Vosseller Leigh EVP & CHIEF FINANCIAL OFFICER
Sold, plan not stated
$900.75K 10,000 at 90.07
75.4%
Sold half or more
11 Feb 2020
Vosseller Leigh EVP & CHIEF FINANCIAL OFFICER
Sold, plan not stated
$290.08K 3,626 at 80.00
52.6%
Sold half or more
10 Feb 2020
Vosseller Leigh EVP & CHIEF FINANCIAL OFFICER
Sold, plan not stated
$510.27K 6,374 at 80.06
66.1%
Sold half or more
29 Jan 2020
Vosseller Leigh EVP & CHIEF FINANCIAL OFFICER
Sold, plan not stated 2×
$759.25K 10,000 at 75.93
75.4%
Sold half or more
25 Nov 2019
Vosseller Leigh EVP & CHIEF FINANCIAL OFFICER
Sold, plan not stated
$703.50K 10,000 at 70.35
75.4%
Sold half or more
18 Nov 2019
Vosseller Leigh EVP & CHIEF FINANCIAL OFFICER
Sold, plan not stated 2×
$654.13K 10,000 at 65.41
75.4%
Sold half or more
16 May 2019
Vosseller Leigh EVP and CFO
Sold, plan not stated
$704.50K 10,000 at 70.45
83.3%
Sold half or more
3 May 2019
Vosseller Leigh EVP and CFO
Sold, plan not stated
$651.40K 10,000 at 65.14
83.3%
Sold half or more
Showing 1–24 of 24.