Insider trading

Period: 120 months Stock: TNDM + 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.

219 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.

219 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.

219 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.

219 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.
219 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
219 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.

219 decisions over 120 months
Stock
Insider
Type ?
Why it stands out
17 Mar 2026
Novara Mark David EVP & CHIEF COMMERCIAL OFFICER
Sold at will
$4.31K 187 at 23.05
0.5%
Not planned
5 Mar 2026
Novara Mark David EVP & CHIEF COMMERCIAL OFFICER
Sold on a plan
$45.62 2 at 22.81
0.0%
Planned (10b5-1)
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
21 Nov 2024
BLICKENSTAFF KIM D Director · indirect
Sold at will
$941.40K 30,000 at 31.38
15.4%
Not planned
20 Nov 2024
BLICKENSTAFF KIM D Director · indirect
Sold at will
$300.00K 10,000 at 30.00
4.9%
Not planned
15 Nov 2024
Novara Mark David EVP & CHIEF COMMERCIAL OFFICER
Bought
$12.36K 532 at 23.24
opened
First buy on file
30 May 2024
Allen Dick Director · indirect
Sold at will
$258.40K 5,000 at 51.68
100%
Sold half or more
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
3 Mar 2023
BERGER DAVID B EVP & Chief Operating Officer
Sold, plan not stated
$411.88K 10,000 at 41.19
74.8%
Sold half or more
16 Dec 2022
BERGER DAVID B EVP & Chief Operating Officer
Sold, plan not stated
$402.50K 10,000 at 40.25
76.8%
Sold half or more
15 Dec 2022
BERGER DAVID B EVP & Chief Operating Officer
Sold, plan not stated
$604.80K 15,000 at 40.32
83.2%
Sold half or more
8 Jun 2022
BERGER DAVID B EVP & Chief Operating Officer
Sold, plan not stated 2×
$656.52K 10,097 at 65.02
80.4%
Sold half or more
17 May 2022
BLICKENSTAFF KIM D Director · indirect
Sold, plan not stated
$999.90K 10,762 at 92.91
5.0%
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 May 2022
TWOMEY CHRISTOPHER J Director · indirect
Sold, plan not stated 2×
$27.71K 248 at 111.73
4.6%
2 May 2022
Sold, plan not stated 2×
$145.09K 1,500 at 96.73
100%
Sold half or more
1 Apr 2022
BERGER DAVID B EVP & Chief Operating Officer
Sold, plan not stated
$117.88K 1,000 at 117.88
17.5%
16 Mar 2022
BERGER DAVID B EVP & Chief Operating Officer
Sold, plan not stated
$541.84K 5,000 at 108.37
51.5%
Sold half or more
14 Mar 2022
Sold, plan not stated
$42.93K 405 at 106.00
33.2%
1 Mar 2022
BERGER DAVID B EVP & Chief Operating Officer
Sold, plan not stated
$112.68K 1,000 at 112.68
17.5%
1 Feb 2022
Sold, plan not stated 3×
$176.95K 1,500 at 117.97
100%
Sold half or more
1 Feb 2022
BERGER DAVID B EVP, Bus Ops & Compliance
Sold, plan not stated 3×
$117.91K 1,000 at 117.91
18.3%
3 Jan 2022
BERGER DAVID B EVP, Bus Ops & Compliance
Sold, plan not stated 2×
$149.16K 1,000 at 149.16
18.3%
27 Dec 2021
Leal James SVP, Operations
Sold, plan not stated 3×
$288.67K 1,906 at 151.45
32.2%
27 Dec 2021
Gasser Elizabeth Anne EVP, Chief Strategy Officer
Sold, plan not stated 2×
$164.07K 1,084 at 151.36
71.6%
Sold half or more
15 Dec 2021
BERGER DAVID B EVP, Bus Ops & Compliance
Sold, plan not stated
$1.73M 12,000 at 144.25
72.9%
Sold half or more
7 Dec 2021
Gasser Elizabeth Anne EVP, Chief Strategy Officer
Sold, plan not stated
$151.62K 1,083 at 140.00
71.5%
Sold half or more
1 Dec 2021
BERGER DAVID B EVP, Bus Ops & Compliance
Sold, plan not stated 2×
$128.44K 1,000 at 128.44
18.3%
29 Nov 2021
Leal James SVP, Operations
Sold, plan not stated 3×
$249.48K 1,905 at 130.96
32.2%
16 Nov 2021
Morrison Susan EVP & Chief Admin. Officer
Sold, plan not stated
$4.92M 34,624 at 142.21
81.1%
Sold half or more
3 Nov 2021
Gasser Elizabeth Anne EVP, Chief Strategy Officer
Sold, plan not stated
$3.05M 21,785 at 140.02
98.9%
Sold half or more
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
3 Nov 2021
Morrison Susan EVP & Chief Admin. Officer
Sold, plan not stated
$763.40K 5,376 at 142.00
39.9%
1 Nov 2021
Sold, plan not stated 2×
$203.66K 1,500 at 135.77
100%
Sold half or more
1 Nov 2021
BERGER DAVID B EVP, Bus Ops & Compliance
Sold, plan not stated 2×
$135.70K 1,000 at 135.70
19.1%
27 Oct 2021
Leal James SVP, Operations
Sold, plan not stated
$248.17K 1,904 at 130.34
33.7%
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
13 Oct 2021
Morrison Susan EVP & Chief Admin. Officer
Sold, plan not stated
$1.33M 10,048 at 132.01
55.4%
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
Showing 1–50 of 219. Page 1 of 5 Older →