Inspire Medical Systems
INSP
325 hedge funds and large institutions have $2.31B invested in Inspire Medical Systems in 2025 Q3 according to their latest regulatory filings, with 66 funds opening new positions, 97 increasing their positions, 131 reducing their positions, and 94 closing their positions.
9% less funds holding
Funds holding: 356 → 325 (-31)
9.43% less ownership
Funds ownership: 114.59% → 105.16% (-9.4%)
26% less repeat investments, than reductions
Existing positions increased: 97 | Existing positions reduced: 131
30% less first-time investments, than exits
New positions opened: 66 | Existing positions closed: 94
47% less capital invested
Capital invested by funds: $4.39B → $2.31B (-$2.08B)
50% less funds holding in top 10
Funds holding in top 10: 2 → 1 (-1)
53% less call options, than puts
Call options by funds: $9.1M | Put options by funds: $19.4M
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Citadel Advisors
Miami,
Florida
|
+$176M |
| 2 |
DM
Deerfield Management
New York
|
+$91.9M |
| 3 |
SCM
Soleus Capital Management
Greenwich,
Connecticut
|
+$62.7M |
| 4 |
Balyasny Asset Management
Chicago,
Illinois
|
+$62.2M |
| 5 |
William Blair Investment Management
Chicago,
Illinois
|
+$53.5M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
DIG
Dragoneer Investment Group
San Francisco,
California
|
-$306M |
| 2 |
Fidelity Investments
Boston,
Massachusetts
|
-$156M |
| 3 |
WA
Wasatch Advisors
Salt Lake City,
Utah
|
-$152M |
| 4 |
TCM
TimesSquare Capital Management
New York
|
-$64.8M |
| 5 |
FCM
Frontier Capital Management
Boston,
Massachusetts
|
-$53.8M |
INSP Hedge Fund Activity: Q3 2025 in Review
325 of the 7,619 institutional investors tracked by Wall St. Rank reported a position in Inspire Medical Systems (INSP) for Q3 2025, worth a combined $2.31B — down 47% from $4.39B a quarter earlier.
Sellers outnumbered buyers: 94 funds closed out of INSP and 66 opened new positions — a net loss of 28 holders — while 131 trimmed existing stakes and 97 added.
The largest buyer was Citadel Advisors, adding an estimated $176M. The largest seller was Dragoneer Investment Group, exiting entirely with an estimated $306M sold.
- 325 institutional investors held Inspire Medical Systems (INSP) as of Q3 2025, down from 356 in Q2 2025.
- Funds reported $2.31B of Inspire Medical Systems stock for Q3 2025, down 47% quarter-over-quarter.
- 66 funds opened new Inspire Medical Systems positions in Q3 2025 and 94 closed out, a net change of -28 holders.
- The largest Inspire Medical Systems buyer in Q3 2025 was Citadel Advisors, an estimated $176M added.
- The largest Inspire Medical Systems seller in Q3 2025 was Dragoneer Investment Group, an estimated $306M sold.
Based on aggregated 13F filings for Q3 2025.