Inspire Medical Systems
INSP
363 hedge funds and large institutions have $5.49B invested in Inspire Medical Systems in 2025 Q1 according to their latest regulatory filings, with 57 funds opening new positions, 141 increasing their positions, 114 reducing their positions, and 50 closing their positions.
24% more repeat investments, than reductions
Existing positions increased: 141 | Existing positions reduced: 114
14% more first-time investments, than exits
New positions opened: 57 | Existing positions closed: 50
3.7% more ownership
Funds ownership: 111.49% → 115.19% (+3.7%)
2% more funds holding
Funds holding: 357 → 363 (+6)
5% more call options, than puts
Call options by funds: $36.7M | Put options by funds: $34.9M
11% less capital invested
Capital invested by funds: $6.2B → $5.49B (-$713M)
25% less funds holding in top 10
Funds holding in top 10: 8 → 6 (-2)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
UBS AM
Chicago,
Illinois
|
+$137M |
| 2 |
DIG
Dragoneer Investment Group
San Francisco,
California
|
+$77.2M |
| 3 |
CAM
Congress Asset Management
Boston,
Massachusetts
|
+$54.3M |
| 4 |
WA
Wasatch Advisors
Salt Lake City,
Utah
|
+$36.6M |
| 5 |
EAM
Eventide Asset Management
Boston,
Massachusetts
|
+$32.8M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Marshall Wace
London,
United Kingdom
|
-$47.4M |
| 2 |
Fuller & Thaler Asset Management
San Mateo,
California
|
-$43.1M |
| 3 |
William Blair Investment Management
Chicago,
Illinois
|
-$37.9M |
| 4 |
Bank of New York Mellon
New York
|
-$36.3M |
| 5 |
AQR Capital Management
Greenwich,
Connecticut
|
-$35.6M |
INSP Hedge Fund Activity: Q1 2025 in Review
363 of the 7,458 institutional investors tracked by Wall St. Rank reported a position in Inspire Medical Systems (INSP) for Q1 2025, worth a combined $5.49B — down 11% from $6.2B a quarter earlier.
Buyers outnumbered sellers: 57 funds opened new INSP positions and 50 closed out — a net gain of 7 holders — while 141 added to existing stakes and 114 trimmed.
The largest buyer was UBS AM, adding an estimated $137M. The largest seller was Marshall Wace, cutting an estimated $47.4M.
- 363 institutional investors held Inspire Medical Systems (INSP) as of Q1 2025, up from 357 in Q4 2024.
- Funds reported $5.49B of Inspire Medical Systems stock for Q1 2025, down 11% quarter-over-quarter.
- 57 funds opened new Inspire Medical Systems positions in Q1 2025 and 50 closed out, a net change of +7 holders.
- The largest Inspire Medical Systems buyer in Q1 2025 was UBS AM, an estimated $137M added.
- The largest Inspire Medical Systems seller in Q1 2025 was Marshall Wace, an estimated $47.4M sold.
Based on aggregated 13F filings for Q1 2025.