INSP: Inspire Medical Systems, Inc. insider trading, 5% holders and institutional ownership
From public SEC filings: open-market insider purchases and sales (Form 4, last 180 days), holders of 5% or more (Schedules 13D and 13G) and institutional ownership (Form 13F). Insider and 5% data delayed 48 hours.
Insider trading
0 open-market buys totaling - and 0 sales totaling - in the last 180 days.
Activist and 5% holders
| Filed | What | Holder | Stake | Change | Filing |
|---|---|---|---|---|---|
| 2026-08-13 | 13G amendment | Soleus Capital Master Fund, L.P. | 6.70% | SEC | |
| 2026-08-12 | New 13G stake | AQR Capital Management, LLC | 6.44% | SEC | |
| 2026-07-31 | 13G amendment | Vanguard Portfolio Management | 7.37% | SEC | |
| 2026-07-28 | 13G amendment | BlackRock, Inc. | 14.40% | SEC |
Institutional ownership (Q2 2026)
275 institutions reported holding $1.65B of Inspire Medical Systems, Inc. on Form 13F (301 the quarter before). 63 opened a new position and 90 sold out. Shares held by institutions: +9%.
| Largest holders | Shares | Value |
|---|---|---|
| BlackRock, Inc. | 4,737,519 | $211.34M |
| WELLINGTON MANAGEMENT GROUP LLP | 2,382,660 | $106.29M |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 2,088,961 | $93.19M |
| Soleus Capital Management, L.P. | 1,931,436 | $86.16M |
| AQR CAPITAL MANAGEMENT LLC | 1,856,800 | $80.94M |
| Assenagon Asset Management S.A. | 1,728,790 | $77.12M |
| UBS Group AG | 1,645,511 | $73.41M |
| D. E. Shaw & Co., Inc. | 1,470,462 | $65.60M |
| NOMURA HOLDINGS INC | 1,369,410 | $61.09M |
| DEERFIELD MANAGEMENT COMPANY, L.P. | 1,296,862 | $57.85M |
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