United States Healthcare Equipment & Supplies

Tandem Diabetes Care Inc (TNDM)

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Over the past 90 days, Tandem Diabetes Care Inc. recorded two insider transactions, both involving proposed sales by officer Mark Novara totaling approximately $9,624. The company's stock has seen a 1.9% decline over the same period, following a May 2026 earnings report where the firm exceeded earnings expectations by 31.8%.
Ticker: TNDM Exchange: NMS
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• Purchase • Sale • Planned purchase • Planned sale Net purchase Net sale Buy signal Sell signal Earnings
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Insider trades have triggered activity signals for Tandem Diabetes Care Inc. Upgrade to see score, net flow, insiders and the full signal context.

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Proposed sale 17 Jun 2026
Value US$2,520,007.14 | Price 274.82 | Shares 7,719
Abbreviations B: Buy, S: Sell, PP: Planned purchase, PlS: Planned sale, PrS: Proposed sale, O: Option / Other
Notification date Transaction date B/S Transaction type Insider and/or position Nb. shares
Price
Value 		Number of shares Price Value Details
2026-06-17 2026-06-17 PrS Proposed sale
MARK NOVARA

Officer

Officer
7,719
274.82
US$2,520,007 		7,719 274.82 US$2,520,007
2026-05-19 2026-05-19 PrS Proposed sale
MARK NOVARA

Officer

Officer
24,503
329.71
US$654,583 		24,503 329.71 US$654,583
2026-03-18 2026-03-17 PlS Planned sale
Novara Mark David

EVP & CHIEF COMMERCIAL OFFICER

Officer
58,772 -24.8%
481.09
US$1,677,001 		58,772 -24.8% 481.09 US$1,677,001
2026-03-17 2026-03-17 PrS Proposed sale
MARK NOVARA

Officer

Officer
187
21.91
US$4,097 		187 21.91 US$4,097
2026-03-09 2026-03-05 PlS Planned sale
Novara Mark David

EVP & CHIEF COMMERCIAL OFFICER

Officer
2 -0.0%
22.81
US$46 		2 -0.0% 22.81 US$46
2026-03-05 2026-03-05 PrS Proposed sale
MARK NOVARA

Officer

Officer
2
23.41
US$47 		2 23.41 US$47
2025-08-11 2025-08-11 B Purchase
2.2
Sheridan John F

PRESIDENT & CEO

Executive Director
10,000 +10.4%
10.23
US$102,318 		10,000 +10.4% 10.23 US$102,318
2025-08-11 2025-08-08 B Purchase
3.3
Vosseller Leigh

EVP & CHIEF FINANCIAL OFFICER

Officer
13,720 +115.7%
10.89
US$149,404 		13,720 +115.7% 10.89 US$149,404
2025-03-11 2025-03-07 B Purchase
1.5
Kyrillos Jean-Claude

EVP & Chief Operating Officer

Officer
10,538 +inf%
18.12
US$190,966 		10,538 +inf% 18.12 US$190,966
2024-11-22 2024-11-21 S Sale
3.1
BLICKENSTAFF KIM D
Non-Executive Director
30,000 -15.4%
31.38
US$941,400 		30,000 -15.4% 31.38 US$941,400
2024-11-21 2024-11-21 PrS Proposed sale
3.1
BLICKENSTAFF KIM D

Board of Directors, Chair Emeritus

Non-Executive Director
30,000
30.00
US$900,000 		30,000 30.00 US$900,000
2024-11-22 2024-11-20 S Sale
3.1
BLICKENSTAFF KIM D
Non-Executive Director
10,000 -4.9%
30.00
US$300,000 		10,000 -4.9% 30.00 US$300,000
2024-11-20 2024-11-20 PrS Proposed sale
3.1
BLICKENSTAFF KIM D

Board of Directors Chair Emeritus

Non-Executive Director
10,000
120.00
US$1,200,000 		10,000 120.00 US$1,200,000
2024-11-19 2024-11-15 PP Planned purchase
Novara Mark David

EVP & CHIEF COMMERCIAL OFFICER

Officer
532 +inf%
23.24
US$12,364 		532 +inf% 23.24 US$12,364
2024-06-03 2024-05-30 S Sale
3.1
Allen Dick
Non-Executive Director
5,000 -100.0%
51.68
US$258,400 		5,000 -100.0% 51.68 US$258,400
2023-11-29 2023-11-27 B Purchase
3.1
Allen Dick
Non-Executive Director
5,000 +33.4%
18.96
US$94,778 		5,000 +33.4% 18.96 US$94,778
2023-11-13 2023-11-08 B Purchase
3.4
Hansen Shannon Marie

Chief Legal Officer

Officer
1,935 +inf%
15.44
US$29,884 		1,935 +inf% 15.44 US$29,884
2023-11-13 2023-11-08 B Purchase
3.3
Vosseller Leigh

EVP & CHIEF FINANCIAL OFFICER

Officer
6,200 +109.5%
15.39
US$95,395 		6,200 +109.5% 15.39 US$95,395
2023-09-19 2023-09-15 B Purchase
2.9
McGroddy-Goetz Kathleen
Non-Executive Director
1,000 +12.5%
21.45
US$21,450 		1,000 +12.5% 21.45 US$21,450
2023-05-22 2023-05-18 B Purchase
3.1
Allen Dick
Non-Executive Director
10,000 +453.5%
29.47
US$294,687 		10,000 +453.5% 29.47 US$294,687
2023-05-19 2023-05-17 B Purchase
1.1
Howell Peyton R
Non-Executive Director
3,000 +54.1%
30.16
US$90,492 		3,000 +54.1% 30.16 US$90,492
2023-05-16 2023-05-12 B Purchase
3.3
Vosseller Leigh

EVP & CHIEF FINANCIAL OFFICER

Officer
3,015 +114.0%
32.77
US$98,805 		3,015 +114.0% 32.77 US$98,805
2023-03-07 2023-03-03 S Sale
3.3
BERGER DAVID B

EVP & Chief Operating Officer

Officer
10,000 -74.8%
41.19
US$411,884 		10,000 -74.8% 41.19 US$411,884
2022-12-19 2022-12-16 S Sale
3.3
BERGER DAVID B

EVP & Chief Operating Officer

Officer
10,000 -76.8%
40.25
US$402,500 		10,000 -76.8% 40.25 US$402,500
2022-12-19 2022-12-15 S Sale
3.3
BERGER DAVID B

EVP & Chief Operating Officer

Officer
15,000 -83.2%
40.32
US$604,800 		15,000 -83.2% 40.32 US$604,800
2022-06-10 2022-06-08 S Sale
3.3
BERGER DAVID B

EVP & Chief Operating Officer

Officer
3,097 -55.8%
65.00
US$201,305 		3,097 -55.8% 65.00 US$201,305
2022-06-10 2022-06-08 S Sale
3.3
BERGER DAVID B

EVP & Chief Operating Officer

Officer
7,000 -55.8%
65.03
US$455,210 		7,000 -55.8% 65.03 US$455,210
2022-05-19 2022-05-17 S Sale
3.1
BLICKENSTAFF KIM D
Non-Executive Director
10,762 -5.0%
92.91
US$999,897 		10,762 -5.0% 92.91 US$999,897
2022-05-10 2022-05-09 B Purchase
3.3
Vosseller Leigh

EVP & CHIEF FINANCIAL OFFICER

Officer
500 +5.8%
70.00
US$35,000 		500 +5.8% 70.00 US$35,000
2022-05-10 2022-05-09 B Purchase
2.2
Sheridan John F

PRESIDENT & CEO

Executive Director
2,500 +33.1%
69.90
US$174,750 		2,500 +33.1% 69.90 US$174,750
2022-05-10 2022-05-06 B Purchase
3.3
Vosseller Leigh

EVP & CHIEF FINANCIAL OFFICER

Officer
1,000 +13.1%
74.90
US$74,900 		1,000 +13.1% 74.90 US$74,900
2022-05-10 2022-05-06 B Purchase
3.3
Vosseller Leigh

EVP & CHIEF FINANCIAL OFFICER

Officer
1,000 +15.1%
76.63
US$76,628 		1,000 +15.1% 76.63 US$76,628
2022-05-10 2022-05-06 B Purchase
1.1
Howell Peyton R
Non-Executive Director
483 +19.6%
74.58
US$36,022 		483 +19.6% 74.58 US$36,022
2022-05-10 2022-05-06 B Purchase
1.1
Howell Peyton R
Non-Executive Director
500 +25.4%
75.00
US$37,500 		500 +25.4% 75.00 US$37,500
2022-05-10 2022-05-06 B Purchase
1.1
Howell Peyton R
Non-Executive Director
400 +25.6%
75.21
US$30,084 		400 +25.6% 75.21 US$30,084
2022-05-10 2022-05-06 B Purchase
1.1
Howell Peyton R
Non-Executive Director
500 +46.9%
74.60
US$37,300 		500 +46.9% 74.60 US$37,300
2022-05-10 2022-05-06 B Purchase
1.1
Howell Peyton R
Non-Executive Director
17 +1.6%
74.57
US$1,268 		17 +1.6% 74.57 US$1,268
2022-05-10 2022-05-06 B Purchase
1.1
Howell Peyton R
Non-Executive Director
100 +10.5%
75.21
US$7,521 		100 +10.5% 75.21 US$7,521
2022-05-10 2022-05-05 S Sale
1.7
TWOMEY CHRISTOPHER J
Non-Executive Director
90 -1.2%
111.73
US$10,056 		90 -1.2% 111.73 US$10,056
2022-05-10 2022-05-05 S Sale
1.7
TWOMEY CHRISTOPHER J
Non-Executive Director
158 -3.0%
111.73
US$17,653 		158 -3.0% 111.73 US$17,653
2022-05-04 2022-05-02 PlS Planned sale
ROBERTSON REBECCA B
Non-Executive Director
967 -100.0%
97.10
US$93,896 		967 -100.0% 97.10 US$93,896
2022-05-04 2022-05-02 PlS Planned sale
ROBERTSON REBECCA B
Non-Executive Director
533 -35.5%
96.05
US$51,195 		533 -35.5% 96.05 US$51,195
2022-05-04 2022-05-02 PlS Planned sale
ROBERTSON REBECCA B
Non-Executive Director
967 -100.0%
97.10
US$93,896 		967 -100.0% 97.10 US$93,896
2022-05-04 2022-05-02 PlS Planned sale
ROBERTSON REBECCA B
Non-Executive Director
533 -35.5%
96.05
US$51,195 		533 -35.5% 96.05 US$51,195
2022-04-05 2022-04-01 PlS Planned sale
3.3
BERGER DAVID B

EVP & Chief Operating Officer

Officer
1,000 -17.5%
117.88
US$117,880 		1,000 -17.5% 117.88 US$117,880
2022-03-21 2022-03-16 S Sale
3.3
BERGER DAVID B

EVP & Chief Operating Officer

Officer
5,000 -51.5%
108.37
US$541,843 		5,000 -51.5% 108.37 US$541,843
2022-03-16 2022-03-14 S Sale
2.9
McGroddy-Goetz Kathleen
Non-Executive Director
405 -33.2%
106.00
US$42,930 		405 -33.2% 106.00 US$42,930
2022-03-02 2022-03-01 PlS Planned sale
3.3
BERGER DAVID B

EVP & Chief Operating Officer

Officer
1,000 -17.5%
112.68
US$112,680 		1,000 -17.5% 112.68 US$112,680
2022-02-03 2022-02-01 PlS Planned sale
ROBERTSON REBECCA B
Non-Executive Director
533 -100.0%
118.82
US$63,331 		533 -100.0% 118.82 US$63,331
2022-02-03 2022-02-01 PlS Planned sale
ROBERTSON REBECCA B
Non-Executive Director
667 -55.6%
117.89
US$78,633 		667 -55.6% 117.89 US$78,633
2022-02-03 2022-02-01 PlS Planned sale
ROBERTSON REBECCA B
Non-Executive Director
300 -20.0%
116.63
US$34,989 		300 -20.0% 116.63 US$34,989
2022-02-03 2022-02-01 PlS Planned sale
3.3
BERGER DAVID B

EVP, Bus Ops & Compliance

Officer
358 -7.4%
118.89
US$42,563 		358 -7.4% 118.89 US$42,563
2022-02-03 2022-02-01 PlS Planned sale
3.3
BERGER DAVID B

EVP, Bus Ops & Compliance

Officer
400 -7.7%
117.78
US$47,112 		400 -7.7% 117.78 US$47,112
2022-02-03 2022-02-01 PlS Planned sale
3.3
BERGER DAVID B

EVP, Bus Ops & Compliance

Officer
242 -4.4%
116.67
US$28,234 		242 -4.4% 116.67 US$28,234
2022-01-05 2022-01-03 PlS Planned sale
3.3
BERGER DAVID B

EVP, Bus Ops & Compliance

Officer
170 -3.7%
150.40
US$25,568 		170 -3.7% 150.40 US$25,568
2022-01-05 2022-01-03 PlS Planned sale
3.3
BERGER DAVID B

EVP, Bus Ops & Compliance

Officer
830 -15.2%
148.91
US$123,595 		830 -15.2% 148.91 US$123,595
2021-12-17 2021-12-15 PlS Planned sale
3.3
BERGER DAVID B

EVP, Bus Ops & Compliance

Officer
12,000 -72.9%
144.25
US$1,731,000 		12,000 -72.9% 144.25 US$1,731,000
2021-12-09 2021-12-07 PlS Planned sale
Gasser Elizabeth Anne

EVP, Chief Strategy Officer

Officer
1,083 -71.5%
140.00
US$151,620 		1,083 -71.5% 140.00 US$151,620
2021-12-01 2021-12-01 PlS Planned sale
3.3
BERGER DAVID B

EVP, Bus Ops & Compliance

Officer
100 -2.2%
129.61
US$12,961 		100 -2.2% 129.61 US$12,961
2021-12-01 2021-12-01 PlS Planned sale
3.3
BERGER DAVID B

EVP, Bus Ops & Compliance

Officer
900 -16.5%
128.31
US$115,479 		900 -16.5% 128.31 US$115,479
2021-12-01 2021-11-29 PlS Planned sale
Leal James

SVP, Operations

Officer
5 -0.1%
132.92
US$665 		5 -0.1% 132.92 US$665
2021-12-01 2021-11-29 PlS Planned sale
Leal James

SVP, Operations

Officer
664 -14.2%
131.54
US$87,343 		664 -14.2% 131.54 US$87,343
2021-12-01 2021-11-29 PlS Planned sale
Leal James

SVP, Operations

Officer
1,236 -20.9%
130.64
US$161,471 		1,236 -20.9% 130.64 US$161,471
2021-11-17 2021-11-16 PlS Planned sale
Morrison Susan

EVP & Chief Admin. Officer

Officer
34,624 -81.1%
142.21
US$4,923,713 		34,624 -81.1% 142.21 US$4,923,713
2021-11-05 2021-11-03 PlS Planned sale
3.3
Vosseller Leigh

EVP & CHIEF FINANCIAL OFFICER

Officer
10,000 -61.9%
140.05
US$1,400,505 		10,000 -61.9% 140.05 US$1,400,505
2021-11-05 2021-11-03 PlS Planned sale
Gasser Elizabeth Anne

EVP, Chief Strategy Officer

Officer
21,785 -98.9%
140.02
US$3,050,408 		21,785 -98.9% 140.02 US$3,050,408
2021-11-05 2021-11-03 PlS Planned sale
Morrison Susan

EVP & Chief Admin. Officer

Officer
5,376 -39.9%
142.00
US$763,402 		5,376 -39.9% 142.00 US$763,402
2021-11-03 2021-11-01 PlS Planned sale
3.3
BERGER DAVID B

EVP, Bus Ops & Compliance

Officer
110 -2.5%
136.39
US$15,003 		110 -2.5% 136.39 US$15,003
2021-11-03 2021-11-01 PlS Planned sale
3.3
BERGER DAVID B

EVP, Bus Ops & Compliance

Officer
890 -17.0%
135.61
US$120,693 		890 -17.0% 135.61 US$120,693
2021-11-03 2021-11-01 PlS Planned sale
ROBERTSON REBECCA B
Non-Executive Director
278 -100.0%
136.35
US$37,905 		278 -100.0% 136.35 US$37,905
2021-11-03 2021-11-01 PlS Planned sale
ROBERTSON REBECCA B
Non-Executive Director
1,222 -81.5%
135.64
US$165,752 		1,222 -81.5% 135.64 US$165,752
2021-10-28 2021-10-27 PlS Planned sale
Leal James

SVP, Operations

Officer
1,904 -33.7%
130.34
US$248,167 		1,904 -33.7% 130.34 US$248,167
2021-10-14 2021-10-14 PlS Planned sale
3.3
Vosseller Leigh

EVP & CHIEF FINANCIAL OFFICER

Officer
10,000 -61.9%
135.09
US$1,350,895 		10,000 -61.9% 135.09 US$1,350,895
2021-10-14 2021-10-13 PlS Planned sale
Morrison Susan

EVP & Chief Admin. Officer

Officer
10,048 -55.4%
132.01
US$1,326,421 		10,048 -55.4% 132.01 US$1,326,421
2021-10-14 2021-10-12 PlS Planned sale
3.3
BERGER DAVID B

EVP, Bus Ops & Compliance

Officer
10,000 -70.2%
129.28
US$1,292,823 		10,000 -70.2% 129.28 US$1,292,823
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