Rock Springs Capital Management LP
Position in INSP — Inspire Medical Systems, Inc.
CIK 1595725
Baltimore, MD
Position in INSP
as of Jun 30, 2026
· filed Aug 14, 2026
Position Value
$10,884,840
+$4,086,596 QoQ
Shares Held
244,000
+85.1% QoQ
Ownership
0.844%
of shares outstanding
% of Portfolio
0.53%
of 13F equity value
Holder Rank
#32
of 274 holders
Holding Since
Mar 2020
17 quarters on record
Voting authority
Sole 100%
Shared 0%
None 0%
Common Shares in INSP Over Time
Shares Held
Position Value (USD)
Position in Medical Devices
Healthcare · as of Jun 30, 2026Rock Springs Capital Management LP holds $146,094,606 across 10 Medical Devices names. INSP ranks #5 (7.5% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | PEN |
Penumbra Inc
|
115,750 | $36,548,062 | |
| 2 | IRTC |
iRhythm Holdings, Inc.
|
269,650 | $32,074,867 | |
| 3 | DXCM |
Dexcom Inc
|
343,000 | $23,101,050 | |
| 4 | BSX |
Boston Scientific Corp
|
528,500 | $22,556,380 | |
| 5 | INSP |
Inspire Medical Systems, Inc.
This page
|
244,000 | $10,884,840 | |
| 6 | SYK |
Stryker Corp
|
29,000 | $9,130,360 | |
| 7 | MOBI |
Mobia Medical, Inc.
|
418,200 | $5,603,880 | |
| 8 | ATEC |
Alphatec Holdings, Inc.
|
360,000 | $3,114,000 |
All Filings in INSP
Export CSV
17 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-06-30 | $10,884,840 | 244,000 | Shares | Sole | 2026-08-14 | |
| 2026-03-31 | $6,798,244 | 131,800 | Shares | Sole | 2026-05-15 | |
| 2025-12-31 | $12,082,130 | 131,000 | Shares | Sole | 2026-02-17 | |
| 2025-09-30 | $8,199,100 | 110,500 | Shares | Sole | 2025-11-14 | |
| 2025-06-30 | $13,950,275 | 107,500 | Shares | Sole | 2025-08-14 | |
| 2025-03-31 | $15,808,540 | 99,250 | Shares | Sole | 2025-05-15 | |
| 2024-12-31 | $24,099,400 | 130,000 | Shares | Sole | 2025-02-14 | |
| 2024-09-30 | $27,436,500 | 130,000 | Shares | Sole | 2024-11-14 | |
| 2024-06-30 | $17,397,900 | 130,000 | Shares | Sole | 2024-08-14 | |
| 2024-03-31 | $28,030,095 | 130,500 | Shares | Sole | 2024-05-15 | |
| 2023-12-31 | $20,139,570 | 99,000 | Shares | Sole | 2024-02-14 | |
| 2023-09-30 | $8,830,580 | 44,500 | Shares | Sole | 2023-11-14 | |
| 2021-03-31 | $20,699,000 | 100,000 | Shares | Sole | 2021-05-17 | |
| 2020-12-31 | $40,129,001 | 213,350 | Shares | Sole | 2021-02-16 | |
| 2020-09-30 | $30,455,800 | 236,000 | Shares | Sole | 2020-11-16 | |
| 2020-06-30 | $23,060,300 | 265,000 | Shares | Sole | 2020-08-14 | |
| 2020-03-31 | $12,056,000 | 200,000 | Shares | Sole | 2020-05-15 | |
| No filing history on record for this holder in this stock. | ||||||