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TANDEM DIABETES CARE INC

TNDM Net selling
CIK 0001438133 #2225 in the set updated 17 Sep 2026
Bought (120 mo)
$8.76M
out of their own pocket, the only kind of buying there is
Sold (120 mo)
$287.76M
$45.62 on a plan · $140.35M straight out of an exercise
Sold at will
$147.41M
110 of 313 sales
Net
−$279.00M
−$138.65M against sales at will

By person

25 insiders · 375 transactions
4.6×

John Sheridan holds only 4.6 times base salary in stock. $3.69M of shares against $790.58K in salary for 2025.

Salary from the company's own proxy. The shares are what John Sheridan last reported holding, valued at $23.05, the price Common Stock was last bought or sold at on the open market here, on 17 Mar 2026.

Insider
Role
Bought
Sold
Net
Holding
Of company
Worth
Change
BLICKENSTAFF KIM D
Director
$4.50M (3)
$149.33M (61)
−$144.83M
970,021
1.39%
$22.36M
—
HANSEN BRIAN B
EVP & CHIEF COMMERCIAL OFFICER
—
$25.00M (30) scheduled
−$25.00M
12,622
0.0181%
$290.94K
—
ROEDER DOUGLAS A
Director
$2.00M (2)
$25.78M (12)
−$23.78M
1,007,863
1.45%
$23.23M
−26.3%
Morrison Susan
EVP & Chief Admin. Officer
—
$18.79M (14) scheduled
−$18.79M
52,788
0.0759%
$1.22M
—
Vosseller Leigh
EVP & CHIEF FINANCIAL OFFICER
$530.13K (6)
$17.00M (26) scheduled
−$16.47M
77,910
0.1120%
$1.80M
+6,453%
BERGER DAVID B
EVP & Chief Operating Officer
—
$15.73M (50) scheduled
−$15.73M
8,273
0.0119%
$190.69K
+97.6%
Sheridan John F
PRESIDENT & CEO
$277.07K (2)
$14.15M (22) scheduled
−$13.87M
160,260
0.2303%
$3.69M
+20,499%
Allen Dick
Chair Emeritus
$608.68K (9)
$6.78M (29)
−$6.17M
57,038
0.0820%
$1.31M
+144.2%
TWOMEY CHRISTOPHER J
Director
$150.00K (2)
$5.29M (22)
−$5.14M
56,057
0.0806%
$1.29M
+141.1%
Gasser Elizabeth Anne
EVP, Chief Strategy Officer
—
$3.37M (4) scheduled
−$3.37M
34,505
0.0496%
$795.34K
+3,439%
Leal James
Chief Manufacturing Officer
—
$2.53M (15) scheduled
−$2.53M
16,876
0.0243%
$388.99K
+369.3%
ROBERTSON REBECCA B
Director
—
$2.19M (17) scheduled
−$2.19M
22,542
0.0324%
$519.59K
—
GREENE HOWARD E JR
Director
$100.00K (1)
$1.70M (7)
−$1.60M
30,000
0.0431%
$691.50K
+154.5%
Howell Peyton R
Director
$240.19K (7)
—
+$240.19K
29,836
0.0429%
$687.72K
—
Kyrillos Jean-Claude
EVP & Chief Operating Officer
$190.97K (1)
—
+$190.97K
30,290
0.0435%
$698.18K
—
Valencia Richard P.
Director
$99.06K (2)
—
+$99.06K
3,054
0.0044%
$70.39K
—
CAHILL EDWARD L
Director
—
$89.31K (1) scheduled
−$89.31K
23,274
0.0334%
$536.47K
−87.8%
Hansen Shannon Marie
EVP & Chief Legal Officer
$29.88K (1)
—
+$29.88K
33,585
0.0483%
$774.13K
—
McGroddy-Goetz Kathleen
Director
$21.45K (1)
$42.93K (1)
−$21.48K
26,612
0.0382%
$613.41K
—
Novara Mark David
EVP & CHIEF COMMERCIAL OFFICER
$12.36K (1)
$4.36K (2)
+$8.01K
40,317
0.0579%
$929.31K
—
Cajigas John
EVP, CFO & TREASURER
—
—
—
59,816
0.0860%
$1.38M
+22.1%
Carpenter Rick
EVP & Chief Technology Officer
—
—
—
32,148
0.0462%
$741.01K
—
Sodhi Rajwant
Director
—
—
—
24,280
0.0349%
$559.65K
—
Malagueira Joao Paulo Falcao
Director
—
—
—
22,458
0.0323%
$517.66K
—
Cha Myoungil
Director
—
—
—
22,458
0.0323%
$517.66K
—

Individual transactions

60
Insider
Date
Role
Action
Shares
Price
Amount
Novara Mark David
17 Mar 2026
EVP & CHIEF COMMERCIAL OFFICER
Sell
187
$23.05
$4.31K
BLICKENSTAFF KIM D
21 Nov 2024
Director
Sell indirect
30,000
$31.38
$941.40K
BLICKENSTAFF KIM D
20 Nov 2024
Director
Sell indirect
10,000
$30.00
$300.00K
Allen Dick
30 May 2024
Director
Sell indirect
5,000
$51.68
$258.40K
McGroddy-Goetz Kathleen
14 Mar 2022
Director
Sell
405
$106.00
$42.93K
TWOMEY CHRISTOPHER J
7 Sep 2021
Director
Sell indirect
304
$123.00
$37.39K
BLICKENSTAFF KIM D
2 Sep 2021
Director
Sell indirect
300
$114.26
$34.28K
BLICKENSTAFF KIM D
2 Sep 2021
Director
Sell indirect
28,400
$113.35
$3.22M
TWOMEY CHRISTOPHER J
2 Sep 2021
Director
Sell indirect
4,696
$115.01
$540.08K
TWOMEY CHRISTOPHER J
2 Sep 2021
Director
Sell indirect
4,000
$115.00
$460.00K
BLICKENSTAFF KIM D
17 Aug 2021
Director
Sell indirect
19,250
$109.12
$2.10M
BLICKENSTAFF KIM D
17 Aug 2021
Director
Sell indirect
6,510
$108.09
$703.64K
BLICKENSTAFF KIM D
16 Aug 2021
Director
Sell indirect
24,240
$109.07
$2.64M
BLICKENSTAFF KIM D
13 Aug 2021
Director
Sell indirect
50,000
$107.20
$5.36M
BLICKENSTAFF KIM D
12 Aug 2021
Director
Sell indirect
13,990
$105.50
$1.48M
BLICKENSTAFF KIM D
10 Aug 2021
Director
Sell indirect
3,210
$107.21
$344.13K
BLICKENSTAFF KIM D
9 Aug 2021
Director
Sell indirect
19,239
$107.64
$2.07M
BLICKENSTAFF KIM D
9 Aug 2021
Director
Sell indirect
60,761
$107.64
$6.54M
BLICKENSTAFF KIM D
6 Aug 2021
Director
Sell indirect
2,800
$109.39
$306.30K
ROBERTSON REBECCA B
2 Aug 2021
Director
Sell
1,500
$107.51
$161.26K
Allen Dick
30 Jul 2021
Director
Sell indirect
2,526
$107.00
$270.28K
TWOMEY CHRISTOPHER J
29 Jul 2021
Director
Sell indirect
3,000
$105.00
$315.00K
TWOMEY CHRISTOPHER J
29 Jul 2021
Director
Sell indirect
5,000
$105.00
$525.00K
BLICKENSTAFF KIM D
8 Jun 2021
Director
Sell indirect
2,800
$89.25
$249.90K
BLICKENSTAFF KIM D
8 Jun 2021
Director
Sell indirect
18,077
$88.66
$1.60M
BLICKENSTAFF KIM D
8 Jun 2021
Director
Sell indirect
17,123
$87.41
$1.50M
TWOMEY CHRISTOPHER J
22 Apr 2021
Director
Sell indirect
1,401
$95.00
$133.10K
TWOMEY CHRISTOPHER J
22 Apr 2021
Director
Sell indirect
3,401
$95.00
$323.10K
TWOMEY CHRISTOPHER J
21 Apr 2021
Director
Sell indirect
1,599
$95.02
$151.93K
TWOMEY CHRISTOPHER J
21 Apr 2021
Director
Sell indirect
1,599
$95.02
$151.93K
BLICKENSTAFF KIM D
16 Mar 2021
Director
Sell indirect
1,100
$88.85
$97.74K
BLICKENSTAFF KIM D
16 Mar 2021
Director
Sell indirect
23,828
$88.18
$2.10M
BLICKENSTAFF KIM D
16 Mar 2021
Director
Sell indirect
20,594
$87.19
$1.80M
BLICKENSTAFF KIM D
16 Mar 2021
Director
Sell indirect
5,500
$85.96
$472.77K
BLICKENSTAFF KIM D
15 Mar 2021
Director
Sell indirect
13,044
$87.85
$1.15M
BLICKENSTAFF KIM D
15 Mar 2021
Director
Sell indirect
135,934
$87.10
$11.84M
BLICKENSTAFF KIM D
16 Dec 2020
Director
Sell indirect
100
$90.40
$9.04K
BLICKENSTAFF KIM D
16 Dec 2020
Director
Sell indirect
4,395
$88.85
$390.49K
BLICKENSTAFF KIM D
16 Dec 2020
Director
Sell indirect
48,947
$87.77
$4.30M
BLICKENSTAFF KIM D
16 Dec 2020
Director
Sell indirect
41,158
$86.68
$3.57M
BLICKENSTAFF KIM D
15 Dec 2020
Director
Sell indirect
10,600
$93.05
$986.38K
BLICKENSTAFF KIM D
15 Dec 2020
Director
Sell indirect
2,998
$90.43
$271.12K
BLICKENSTAFF KIM D
11 Dec 2020
Director
Sell indirect
9,150
$93.00
$850.95K
BLICKENSTAFF KIM D
9 Dec 2020
Director
Sell indirect
13,000
$95.06
$1.24M
BLICKENSTAFF KIM D
9 Dec 2020
Director
Sell indirect
2,850
$94.22
$268.52K
BLICKENSTAFF KIM D
1 Dec 2020
Director
Sell indirect
25,000
$97.01
$2.43M
BLICKENSTAFF KIM D
12 Nov 2020
Director
Sell indirect
12,433
$107.46
$1.34M
BLICKENSTAFF KIM D
12 Nov 2020
Director
Sell indirect
4,369
$105.22
$459.72K
TWOMEY CHRISTOPHER J
31 Jul 2020
Director
Sell indirect
2,500
$110.00
$275.00K
TWOMEY CHRISTOPHER J
31 Jul 2020
Director
Sell indirect
5,000
$110.06
$550.32K
TWOMEY CHRISTOPHER J
2 Jul 2020
Director
Sell indirect
2,500
$100.02
$250.06K
TWOMEY CHRISTOPHER J
2 Jul 2020
Director
Sell indirect
1,062
$101.17
$107.44K
TWOMEY CHRISTOPHER J
2 Jul 2020
Director
Sell indirect
3,938
$100.20
$394.57K
BLICKENSTAFF KIM D
30 Jun 2020
Director
Sell indirect
10,192
$96.02
$978.61K
BLICKENSTAFF KIM D
30 Jun 2020
Director
Sell indirect
39,808
$95.45
$3.80M
TWOMEY CHRISTOPHER J
7 May 2020
Director
Sell indirect
2,500
$90.00
$225.00K
TWOMEY CHRISTOPHER J
7 May 2020
Director
Sell indirect
5,000
$90.04
$450.21K
Allen Dick
7 May 2020
Director
Sell indirect
500
$89.00
$44.50K
Allen Dick
7 May 2020
Director
Sell indirect
500
$89.00
$44.50K
Allen Dick
7 May 2020
Director
Sell indirect
2,500
$89.00
$222.50K
Showing 250 of 375 transactions. The figures above use every one of them.

What was left out

Form 4 filings counted 652
Amendments (4/A) skipped 4
Filings about a different issuer 0
Unreadable filings 0
Joint filings 0
Sales on a Rule 10b5-1 plan 1
Sales straight out of an exercise 202
Sales at will 110
Transactions with no price 0
Shares from compensation/vesting 4,925,455
Sales filed before the plan box existed 106
History held since 16 Nov 2016