Inspire Medical Systems
INSP · NYSE
$71.34+$1.19 (+1.70%)TodayMarket closed ·
Prev close $70.15
Who owns INSP
Largest institutional holders, from their latest 13F filings
The 10 largest institutions hold 66.3% of INSP’s shares.
- BlackRock Institutional Trust Company, N.A.13.9%
- Wellington Management Company, LLP8.3%
- Vanguard Portfolio Management, LLC7.3%
- Soleus Capital Management, L.P.6.7%
- Next 6 largest institutions30.2%
- All other shareholders33.7%
| Holder | Shares | % of shares |
|---|---|---|
| BlackRock Institutional Trust Company, N.A. | 4.01M | 13.92% |
| Wellington Management Company, LLP | 2.38M | 8.27% |
| Vanguard Portfolio Management, LLC | 2.09M | 7.25% |
| Soleus Capital Management, L.P. | 1.93M | 6.70% |
| AQR Capital Management, LLC | 1.86M | 6.44% |
| D. E. Shaw & Co., L.P. | 1.47M | 5.10% |
| UBS Financial Services, Inc. | 1.43M | 4.97% |
| Nomura Securities Co., Ltd. | 1.37M | 4.75% |
| Deerfield Management Company, L.P. | 1.30M | 4.50% |
| Vanguard Capital Management, LLC | 1.27M | 4.41% |
Largest mutual fund holders
| Holder | Shares | % of shares |
|---|---|---|
| Vanguard Health Care Fund | 2.09M | 7.27% |
| iShares Core S&P Small-Cap ETF | 1.60M | 5.54% |
| Vanguard Total Stock Market Index Fund | 914.15K | 3.17% |
| iShares Russell 2000 ETF | 747.29K | 2.59% |
| Vanguard Small-Cap Index Fund | 663.58K | 2.30% |
Insider trades
Form 4 filings by officers, directors and large holders
Over the last 6 months, insiders sold $233.29K (4 trades) of INSP on the open market, with no buys.
| Insider | Type | Shares | Value |
|---|---|---|---|
| Melenikiotou Georgia | Award | 255 | $17.36K |
| Broader Shelley G | Award | 284 | $19.33K |
| Ellis Gary Lee | Award | 431 | $29.34K |
| CARREL MICHAEL H | Award | 203 | $13.82K |
| Kelly Jason P | Award | 6.35K | — |
| Kelly Jason P | Sale | 963 | $57.35K |
| Mann Melissa | Tax withholding | 326 | $16.37K |
| CARREL MICHAEL H | Award | 5.63K | — |
| Melenikiotou Georgia | Award | 344 | — |
| Tansey Casey M | Award | 346 | — |
Short interest
Settled Sep 30, 2026
- Shares short
- 4.20M
- Days to cover
- 4.63
- % of shares outstanding
- 14.56%
- Average daily volume
- 906.71K
- Change since last report
- +6.8%
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