Insider trading

Period: 120 months Stock: TNDM Type of trade: Bought × + Add filter Clear all
Views & alerts

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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.

26 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.

26 decisions over 120 months
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.

26 decisions over 120 months Remove this filter
The trade

Minimum amount

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

26 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.
26 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
26 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.

26 decisions over 120 months
Stock
Insider
Type ?
Why it stands out
11 Aug 2025
Sheridan John F PRESIDENT & CEO
Bought
$102.32K 10,000 at 10.23
10.4%
First buy in 3+ yrs
8 Aug 2025
Vosseller Leigh EVP & CHIEF FINANCIAL OFFICER · indirect
Bought
$149.40K 13,720 at 10.89
116%
Largest buy in 3 yrs
7 Mar 2025
Kyrillos Jean-Claude EVP & Chief Operating Officer
Bought
$190.97K 10,538 at 18.12
opened
First buy on file
15 Nov 2024
Novara Mark David EVP & CHIEF COMMERCIAL OFFICER
Bought
$12.36K 532 at 23.24
opened
First buy on file
27 Nov 2023
Allen Dick Director
Bought
$94.78K 5,000 at 18.96
33.4%
+33% of stake
8 Nov 2023
Vosseller Leigh EVP & CHIEF FINANCIAL OFFICER · indirect
Bought
$95.40K 6,200 at 15.39
110%
+110% of stake
8 Nov 2023
Hansen Shannon Marie Chief Legal Officer · indirect
Bought
$29.88K 1,935 at 15.44
opened
First buy on file
15 Sep 2023
Bought
$21.45K 1,000 at 21.45
12.5%
First buy on file
18 May 2023
Allen Dick Director
Bought
$294.69K 10,000 at 29.47
454%
First buy on file
17 May 2023
Howell Peyton R Director
Bought
$90.49K 3,000 at 30.16
54.1%
+54% 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
Sheridan John F PRESIDENT & CEO
Bought
$174.75K 2,500 at 69.90
33.1%
First buy on file
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
6 May 2022
Howell Peyton R Director
Bought 6×
$149.69K 2,000 at 74.85
211%
First buy on file
5 Nov 2018
Bought
$49.08K 1,300 at 37.75
74.1%
First buy on file
3 Aug 2018
Bought
$49.99K 1,754 at 28.50
opened
First buy on file
6 Mar 2018
Allen Dick Director · indirect
Bought 4×
$74.77K 19,239 at 3.89
697%
First buy on file
6 Mar 2018
Allen Dick Director
Bought
$24.44K 6,300 at 3.88
opened
First buy on file
9 Feb 2018
ROEDER DOUGLAS A Director · indirect
Bought 2×
$2.00M 1,000,000 at 2.00
283%
First buy on file
9 Feb 2018
BLICKENSTAFF KIM D PRESIDENT & CEO · indirect
Bought
$1.50M 750,000 at 2.00
154%
First buy on file
9 Feb 2018
TWOMEY CHRISTOPHER J Director · indirect
Bought 2×
$150.00K 75,000 at 2.00
opened
First buy on file
9 Feb 2018
Allen Dick Director · indirect
Bought 2×
$120.00K 60,000 at 2.00
×19
First buy on file
9 Feb 2018
GREENE HOWARD E JR Director · indirect
Bought
$100.00K 50,000 at 2.00
424%
First buy on file
13 Oct 2017
BLICKENSTAFF KIM D PRESIDENT & CEO · indirect
Bought
$999.95K 285,700 at 3.50
142%
First buy on file
23 Mar 2017
BLICKENSTAFF KIM D PRESIDENT & CEO
Bought
$2.00M 1,600,000 at 1.25
392%
First buy on file
Showing 1–26 of 26.