Insider trading

Period: 120 months Stock: TNDM Share of holding: 50% or more × + Add filter Clear all
Views & alerts

Save your view. Keep the filter you have built, and get an email when a new filing matches it. A free account does both.

When

Period

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

106 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.

106 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.

106 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.

106 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.
106 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
106 decisions over 120 months Remove this filter
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.

106 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
30 May 2024
Allen Dick Director · indirect
Sold at will
$258.40K 5,000 at 51.68
100%
Sold half or more
8 Nov 2023
Vosseller Leigh EVP & CHIEF FINANCIAL OFFICER · indirect
Bought
$95.40K 6,200 at 15.39
110%
+110% of stake
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
6 May 2022
Howell Peyton R Director
Bought 6×
$149.69K 2,000 at 74.85
211%
First buy on file
2 May 2022
Sold, plan not stated 2×
$145.09K 1,500 at 96.73
100%
Sold half or more
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
1 Feb 2022
Sold, plan not stated 3×
$176.95K 1,500 at 117.97
100%
Sold half or more
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
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
1 Nov 2021
Sold, plan not stated 2×
$203.66K 1,500 at 135.77
100%
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
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
12 Oct 2021
BERGER DAVID B EVP, Bus Ops & Compliance
Sold, plan not stated
$1.29M 10,000 at 129.28
70.2%
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
BERGER DAVID B EVP, Bus Ops & Compliance
Sold, plan not stated 3×
$1.10M 9,000 at 121.99
67.9%
Sold half or more
13 Sep 2021
HANSEN BRIAN B EVP & CHIEF COMMERCIAL OFFICER
Sold, plan not stated 5×
$3.83M 32,180 at 119.00
83.6%
Sold half or more
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
2 Sep 2021
TWOMEY CHRISTOPHER J Director · indirect
Sold, plan not stated 2×
$1.00M 8,696 at 115.00
53.6%
Sold half or more
17 Aug 2021
BERGER DAVID B EVP, Chief Business/Compliance
Sold, plan not stated
$551.45K 5,000 at 110.29
55.3%
Sold half or more
16 Aug 2021
BERGER DAVID B EVP, Chief Business/Compliance
Sold, plan not stated
$547.00K 5,000 at 109.40
55.3%
Sold half or more
9 Aug 2021
Sheridan John F PRESIDENT & CEO
Sold, plan not stated 2×
$1.03M 9,603 at 107.65
60.8%
Sold half or more
2 Aug 2021
Sold, plan not stated
$161.26K 1,500 at 107.51
79.3%
Sold half or more
28 Jun 2021
Leal James SVP, Operations
Sold, plan not stated
$713.50K 7,135 at 100.00
66.5%
Sold half or more
11 Mar 2021
BERGER DAVID B EVP, Chief Business/Compliance
Sold, plan not stated
$780.04K 8,646 at 90.22
65.4%
Sold half or more
1 Mar 2021
Sold, plan not stated
$144.21K 1,500 at 96.14
100%
Sold half or more
1 Dec 2020
Sold, plan not stated
$141.04K 1,500 at 94.03
100%
Sold half or more
13 Oct 2020
Sheridan John F PRESIDENT & CEO
Sold, plan not stated 3×
$1.82M 15,000 at 121.31
80.0%
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
13 Oct 2020
BERGER DAVID B EVP, Chief Legal & Compliance
Sold, plan not stated
$596.25K 5,000 at 119.25
52.3%
Sold half or more
7 Oct 2020
HANSEN BRIAN B EVP & CHIEF COMMERCIAL OFFICER
Sold, plan not stated
$1.77M 15,000 at 117.76
76.3%
Sold half or more
16 Sep 2020
HANSEN BRIAN B EVP & CHIEF COMMERCIAL OFFICER
Sold, plan not stated 2×
$1.19M 10,525 at 113.00
69.3%
Sold half or more
15 Sep 2020
Sheridan John F PRESIDENT & CEO
Sold, plan not stated
$1.06M 9,599 at 110.00
71.9%
Sold half or more
3 Sep 2020
HANSEN BRIAN B EVP & CHIEF COMMERCIAL OFFICER
Sold, plan not stated 4×
$4.36M 39,132 at 111.36
89.3%
Sold half or more
2 Sep 2020
Sold, plan not stated 5×
$1.08M 9,500 at 114.14
100%
Sold half or more
31 Aug 2020
Morrison Susan EVP & Chief Admin. Officer
Sold, plan not stated
$746.47K 6,548 at 114.00
51.1%
Sold half or more
28 Aug 2020
Morrison Susan EVP & Chief Admin. Officer
Sold, plan not stated
$857.51K 7,522 at 114.00
54.6%
Sold half or more
3 Aug 2020
Sheridan John F PRESIDENT & CEO
Sold, plan not stated 2×
$3.39M 33,200 at 102.21
89.8%
Sold half or more
3 Aug 2020
HANSEN BRIAN B EVP & CHIEF COMMERCIAL OFFICER
Sold, plan not stated 4×
$2.54M 23,954 at 105.86
83.7%
Sold half or more
Showing 1–50 of 106. Page 1 of 3 Older →