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 | $213K | Sell |
11,100
-5,200
| -32% | -$113K | ﹤0.01% | 4229 |
|
|
2025
Q4 | $358K | Sell |
16,300
-1,500
| -8% | -$27.1K | ﹤0.01% | 3636 |
|
|
2025
Q3 | $216K | Buy |
17,800
+3,700
| +26% | +$50.1K | ﹤0.01% | 4858 |
|
|
2025
Q2 | $262K | Sell |
14,100
-50,800
| -78% | -$1.01M | ﹤0.01% | 4221 |
|
|
2025
Q1 | $1.24M | Buy |
64,900
+48,300
| +291% | +$1.41M | ﹤0.01% | 2491 |
|
|
2024
Q4 | $597K | Sell |
16,600
-7,100
| -30% | -$240K | ﹤0.01% | 3339 |
|
|
2024
Q3 | $1M | Sell |
23,700
-31,900
| -57% | -$1.35M | ﹤0.01% | 2917 |
|
|
2024
Q2 | $2.24M | Sell |
55,600
-27,000
| -33% | -$1.13M | ﹤0.01% | 2087 |
|
|
2024
Q1 | $2.92M | Buy |
82,600
+13,200
| +19% | +$354K | ﹤0.01% | 2053 |
|
|
2023
Q4 | $2.05M | Buy |
69,400
+57,700
| +493% | +$1.2M | ﹤0.01% | 2335 |
|
|
2023
Q3 | $243K | Sell |
11,700
-3,400
| -23% | -$93.4K | ﹤0.01% | 4152 |
|
|
2023
Q2 | $370K | Sell |
15,100
-1,800
| -11% | -$57.9K | ﹤0.01% | 3618 |
|
|
2023
Q1 | $686K | Buy |
16,900
+8,800
| +109% | +$364K | ﹤0.01% | 2949 |
|
|
2022
Q4 | $364K | Sell |
8,100
-17,000
| -68% | -$770K | ﹤0.01% | 3526 |
|
|
2022
Q3 | $1.2M | Sell |
25,100
-31,400
| -56% | -$1.72M | ﹤0.01% | 2442 |
|
|
2022
Q2 | $3.34M | Buy |
56,500
+48,500
| +606% | +$3.98M | ﹤0.01% | 1411 |
|
|
2022
Q1 | $930K | Sell |
8,000
-32,200
| -80% | -$3.76M | ﹤0.01% | 3016 |
|
|
2021
Q4 | $6.05M | Sell |
40,200
-35,100
| -47% | -$4.74M | 0.01% | 1092 |
|
|
2021
Q3 | $7.35M | Buy |
75,300
+800
| +1% | +$88.1K | 0.01% | 919 |
|
|
2021
Q2 | $7.26M | Buy |
74,500
+74,299
| +36,965% | +$6.63M | 0.01% | 900 |
|
|
2021
Q1 | $1.77M | Sell |
201
-335
| -63% | -$31.1K | ﹤0.01% | 1748 |
|
|
2020
Q4 | $5.13M | Sell |
536
-1
| -0.2% | -$103 | 0.01% | 976 |
|
|
2020
Q3 | $6.09M | Sell |
537
-89
| -14% | -$9.35K | 0.01% | 744 |
|
|
2020
Q2 | $6.19M | Buy |
626
+447
| +250% | +$35.7K | 0.01% | 729 |
|
|
2020
Q1 | $1.15M | Sell |
179
-187
| -51% | -$13.1K | ﹤0.01% | 1746 |
|
|
2019
Q4 | $2.18M | Sell |
366
-353
| -49% | -$21.8K | ﹤0.01% | 1403 |
|
|
2019
Q3 | $4.24M | Buy |
719
+370
| +106% | +$23.6K | 0.01% | 812 |
|
|
2019
Q2 | $2.25M | Sell |
349
-206
| -37% | -$13.3K | 0.01% | 1215 |
|
|
2019
Q1 | $3.52M | Sell |
555
-378
| -41% | -$19.9K | 0.01% | 926 |
|
|
2018
Q4 | $3.54M | Sell |
933
-85
| -8% | -$3K | 0.01% | 742 |
|
|
2018
Q3 | $4.36M | Sell |
1,018
-215
| -17% | -$7.51K | 0.01% | 697 |
|
|
2018
Q2 | $2.71M | Buy |
+1,233
| New | +$15.2K | 0.01% | 930 |
|
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.