FRONTIER CAPITAL MANAGEMENT CO LLC
Position in TNDM — Tandem Diabetes Care Inc
CIK 351173
Boston, MA
Position in TNDM
as of Jun 30, 2026
· filed Aug 14, 2026
Position Value
$5,741,111
-$1,873,385 QoQ
Shares Held
380,458
-4.2% QoQ
Ownership
0.547%
of shares outstanding
% of Portfolio
0.05%
of 13F equity value
Holder Rank
#40
of 274 holders
Holding Since
Mar 2020
26 quarters on record
Voting authority
Sole 76%
Shared 0%
None 24%
Common Shares in TNDM Over Time
Shares Held
Position Value (USD)
Position in Medical Devices
Healthcare · as of Jun 30, 2026FRONTIER CAPITAL MANAGEMENT CO LLC holds $223,011,989 across 9 Medical Devices names. TNDM ranks #8 (2.6% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | PODD |
Insulet Corp
|
622,506 | $94,776,538 | |
| 2 | DXCM |
Dexcom Inc
|
547,220 | $36,855,267 | |
| 3 | PRCT |
PROCEPT BioRobotics Corp
|
1,091,528 | $24,646,702 | |
| 4 | STE |
STERIS plc
|
92,310 | $19,437,716 | |
| 5 | IRTC |
iRhythm Holdings, Inc.
|
132,475 | $15,757,901 | |
| 6 | GEHC |
GE HealthCare Technologies Inc.
|
160,021 | $10,242,944 | |
| 7 | TMDX |
TransMedics Group, Inc.
|
150,162 | $9,973,760 | |
| 8 | TNDM |
Tandem Diabetes Care Inc
This page
|
380,458 | $5,741,111 |
All Filings in TNDM
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26 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-06-30 | $5,741,111 | 380,458 | Shares | Sole | 2026-08-14 | |
| 2026-03-31 | $7,614,496 | 397,209 | Shares | Sole | 2026-05-15 | |
| 2025-12-31 | $9,061,672 | 412,269 | Shares | Sole | 2026-02-17 | |
| 2025-09-30 | $5,042,276 | 415,344 | Shares | Sole | 2025-11-14 | |
| 2025-06-30 | $6,786,786 | 364,098 | Shares | Sole | 2025-08-14 | |
| 2025-03-31 | $6,996,772 | 365,176 | Shares | Sole | 2025-05-15 | |
| 2024-12-31 | $9,800,609 | 272,088 | Shares | Sole | 2025-02-14 | |
| 2024-09-30 | $7,670,315 | 180,861 | Shares | Sole | 2024-11-14 | |
| 2024-06-30 | $7,341,804 | 182,224 | Shares | Sole | 2024-08-14 | |
| 2024-03-31 | $6,527,408 | 184,338 | Shares | Sole | 2024-05-15 | |
| 2023-12-31 | $4,315,988 | 145,909 | Shares | Sole | 2024-02-14 | |
| 2023-09-30 | $3,029,096 | 145,840 | Shares | Sole | 2023-11-14 | |
| 2023-06-30 | $3,614,570 | 147,293 | Shares | Sole | 2023-08-14 | |
| 2023-03-31 | $6,042,971 | 148,805 | Shares | Sole | 2023-05-15 | |
| 2022-12-31 | $5,131,671 | 114,164 | Shares | Sole | 2023-02-14 | |
| 2022-09-30 | $5,478,872 | 114,501 | Shares | Sole | 2022-11-14 | |
| 2022-06-30 | $3,828,941 | 64,689 | Shares | Sole | 2022-07-20 | |
| 2022-03-31 | $7,738,634 | 66,546 | Shares | Sole | 2022-04-14 | |
| 2021-12-31 | $10,052,929 | 66,788 | Shares | Sole | 2022-01-19 | |
| 2021-09-30 | $8,085,129 | 67,726 | Shares | Sole | 2021-10-19 | |
| 2021-06-30 | $6,774,657 | 69,555 | Shares | Sole | 2021-08-09 | |
| 2021-03-31 | $6,475,432 | 73,376 | Shares | Sole | 2021-05-13 | |
| 2020-12-31 | $10,915,557 | 114,084 | Shares | Sole | 2021-01-19 | |
| 2020-09-30 | $16,024,043 | 141,181 | Shares | Sole | 2020-11-16 | |
| 2020-06-30 | $15,199,255 | 153,652 | Shares | Sole | 2020-07-17 | |
| 2020-03-31 | $11,020,259 | 171,255 | Shares | Sole | 2020-04-16 | |
| No filing history on record for this holder in this stock. | ||||||