Simplex Trading’s Tandem Diabetes Care TNDM Stock Holding History
Bought
Maintained
Sold
| Quarter | Market Value | Status | Shares |
Change in Stake | Trade Value | Portfolio Weight | Portfolio Position | |
|---|---|---|---|---|---|---|---|---|
|
2026
Q1 | $30.7K | Sell |
1,600
-3,900
| -71% | -$84.7K | ﹤0.01% | 6363 |
|
|
2025
Q4 | $121K | Sell |
5,500
-19,300
| -78% | -$348K | ﹤0.01% | 4792 |
|
|
2025
Q3 | $301K | Buy |
24,800
+9,900
| +66% | +$134K | ﹤0.01% | 4456 |
|
|
2025
Q2 | $277K | Buy |
14,900
+11,600
| +352% | +$230K | ﹤0.01% | 4177 |
|
|
2025
Q1 | $63K | Sell |
3,300
-2,400
| -42% | -$70.2K | ﹤0.01% | 5545 |
|
|
2024
Q4 | $205K | Buy |
5,700
+200
| +4% | +$6.76K | ﹤0.01% | 4492 |
|
|
2024
Q3 | $233K | Sell |
5,500
-13,000
| -70% | -$551K | ﹤0.01% | 4380 |
|
|
2024
Q2 | $745K | Buy |
18,500
+10,900
| +143% | +$455K | ﹤0.01% | 3233 |
|
|
2024
Q1 | $269K | Sell |
7,600
-2,200
| -22% | -$58.9K | ﹤0.01% | 4535 |
|
|
2023
Q4 | $289K | Sell |
9,800
-700
| -7% | -$14.5K | ﹤0.01% | 4271 |
|
|
2023
Q3 | $218K | Buy |
10,500
+6,500
| +163% | +$179K | ﹤0.01% | 4242 |
|
|
2023
Q2 | $98K | Buy |
4,000
+800
| +25% | +$25.7K | ﹤0.01% | 5111 |
|
|
2023
Q1 | $129K | Sell |
3,200
-9,200
| -74% | -$381K | ﹤0.01% | 4865 |
|
|
2022
Q4 | $557K | Buy |
12,400
+3,000
| +32% | +$136K | ﹤0.01% | 3054 |
|
|
2022
Q3 | $449K | Sell |
9,400
-27,200
| -74% | -$1.49M | ﹤0.01% | 3587 |
|
|
2022
Q2 | $2.17M | Buy |
36,600
+28,400
| +346% | +$2.33M | ﹤0.01% | 1784 |
|
|
2022
Q1 | $953K | Buy |
8,200
+1,400
| +21% | +$163K | ﹤0.01% | 2985 |
|
|
2021
Q4 | $1.02M | Sell |
6,800
-15,700
| -70% | -$2.12M | ﹤0.01% | 2822 |
|
|
2021
Q3 | $2.19M | Hold |
22,500
| – | – | ﹤0.01% | 2032 |
|
|
2021
Q2 | $2.19M | Buy |
22,500
+22,262
| +9,354% | +$1.99M | ﹤0.01% | 2038 |
|
|
2021
Q1 | $2.1M | Sell |
238
-98
| -29% | -$9.11K | ﹤0.01% | 1555 |
|
|
2020
Q4 | $3.21M | Buy |
336
+194
| +137% | +$20K | ﹤0.01% | 1331 |
|
|
2020
Q3 | $1.61M | Sell |
142
-59
| -29% | -$6.2K | ﹤0.01% | 1731 |
|
|
2020
Q2 | $1.99M | Sell |
201
-101
| -33% | -$8.06K | ﹤0.01% | 1511 |
|
|
2020
Q1 | $1.94M | Buy |
302
+102
| +51% | +$7.15K | ﹤0.01% | 1297 |
|
|
2019
Q4 | $1.19M | Sell |
200
-100
| -33% | -$6.17K | ﹤0.01% | 1932 |
|
|
2019
Q3 | $1.77M | Buy |
300
+99
| +49% | +$6.32K | 0.01% | 1430 |
|
|
2019
Q2 | $1.3M | Sell |
201
-214
| -52% | -$13.8K | ﹤0.01% | 1674 |
|
|
2019
Q1 | $2.63M | Sell |
415
-47
| -10% | -$2.47K | 0.01% | 1132 |
|
|
2018
Q4 | $1.75M | Sell |
462
-214
| -32% | -$7.56K | 0.01% | 1180 |
|
|
2018
Q3 | $2.9M | Buy |
676
+125
| +23% | +$4.37K | 0.01% | 956 |
|
|
2018
Q2 | $1.21M | Buy |
+551
| New | +$6.78K | ﹤0.01% | 1614 |
|
Other funds holding TNDM
SC
VPM
ACH
VCM
GKIM
DCM
Simplex Trading's TNDM Position: Q1 2026 in Review
Simplex Trading opened a new position in Tandem Diabetes Care (TNDM) in Q1 2026: 2,903 shares worth $55.6K. The stake represents ﹤0.01% of the portfolio and ranks #5755 among its holdings. This is a return to the name: Simplex Trading previously reported a position in TNDM as recently as Q3 2025.
Simplex Trading first reported a position in TNDM in Q1 2015 and has held it in 20 quarters since. The position peaked at $1.26M in Q1 2020. 272 funds tracked by Wall St. Rank hold TNDM as of Q1 2026.
- Simplex Trading held 2,903 shares of Tandem Diabetes Care worth $55.6K as of Q1 2026.
- Tandem Diabetes Care was a new Simplex Trading position in Q1 2026.
- Tandem Diabetes Care made up ﹤0.01% of Simplex Trading's portfolio in Q1 2026, its #5755 holding.
- Simplex Trading first reported a position in Tandem Diabetes Care in Q1 2015 and has held it in 20 quarters since.
- Simplex Trading's Tandem Diabetes Care position peaked at $1.26M in Q1 2020.
- 272 funds tracked by Wall St. Rank held Tandem Diabetes Care as of Q1 2026.
Based on Simplex Trading's 13F filing for Q1 2026, filed 14 May 2026.