🕵️ Inspire Medical Systems, Inc. ($INSP)
SEC insider & ownership activity, last 12 months · CIK 1609550 · every row links its SEC filing
Over the last 12 months insiders sold $1.6M against $804 of open-market buying. Buchholz Richard sold $1.0M in discretionary trades (Aug). 1 planned sale is pending, the largest $30K (John Rondoni). No red-flag 8-Ks in the window.
🚨 1 signal active —
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Monthly net open-market insider flow, last 12 months (up = net buying)
Insider flow
1 buyer, $804 (2 lots) · 4 sellers, $1.6M (9 lots)
| Insider | Buys | Bought | Sells | Sold | Last |
|---|---|---|---|---|---|
| Buchholz Richard | 0 | – | 1 | $1.0M | Aug 29, 2025 |
| Shawn T McCormick | 0 | – | 3 | $453K | May 8, 2026 |
| John Rondoni | 0 | – | 3 | $155K | May 15, 2026 |
| Curet Myriam | 2 | $804 | 2 | $616 | Aug 8, 2025 |
5%+ holders
| Holder | Stake | Class | Schedule | Event | |
|---|---|---|---|---|---|
| Blackrock, Inc. | 14.4% | 13G | Jul 28, 2026 | filing ↗ | |
| Wellington Management Group LLP | 8.8% | 13G | May 15, 2026 | filing ↗ | |
| Wellington Group Holdings LLP | 8.8% | 13G | May 15, 2026 | filing ↗ | |
| Wellington Investment Advisors Holdings LLP | 8.8% | 13G | May 15, 2026 | filing ↗ | |
| Wellington Management Company LLP | 8.6% | 13G | May 15, 2026 | filing ↗ | |
| Vanguard Portfolio Management | 5.7% | 13G | Apr 29, 2026 | filing ↗ | |
| Vanguard Capital Management | 5.1% | 13G | Apr 30, 2026 | filing ↗ | |
| Soleus Capital Master Fund, L.P. | 5.1% | 13G | May 27, 2026 | filing ↗ | |
| Soleus Capital, LLC | 5.1% | 13G | May 27, 2026 | filing ↗ | |
| Soleus Capital Group, LLC | 5.1% | 13G | May 27, 2026 | filing ↗ | |
| Soleus Capital Management, L.P. | 5.1% | 13G | May 27, 2026 | filing ↗ | |
| Soleus GP, LLC | 5.1% | 13G | May 27, 2026 | filing ↗ | |
| Guy Levy | 5.1% | 13G | May 27, 2026 | filing ↗ | |
| D. E. SHAW & Co., L.P. | 5.1% | 13G | Jul 2, 2026 | filing ↗ | |
| David E. Shaw | 5.1% | 13G | Jul 2, 2026 | filing ↗ |
Planned insider sales (Form 144)
| Seller | Planned | Approx. sale date | |
|---|---|---|---|
| John Rondoni | $114K | May 15, 2026 | filing ↗ |
| John Rondoni | $30K | May 14, 2026 | filing ↗ |
| Shawn T McCormick | $32K | May 8, 2026 | filing ↗ |
| John Rondoni | $10K | Jan 9, 2026 | filing ↗ |
| Shawn T McCormick | $152K | Dec 2, 2025 | filing ↗ |
| Shawn T McCormick | $255K | Nov 28, 2025 | filing ↗ |
| Buchholz Richard | $1.0M | Aug 29, 2025 | filing ↗ |
Material events (8-K)
| Item | Event date | |
|---|---|---|
| Officer/director changes (5.02) | Jul 20, 2026 | filing ↗ |
| Officer/director changes (5.02) | Jul 16, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jul 16, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Jun 26, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jun 26, 2026 | filing ↗ |
| Earnings (2.02) | May 4, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | May 4, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | May 4, 2026 | filing ↗ |
| Officer/director changes (5.02) | Apr 30, 2026 | filing ↗ |
| Charter/bylaw changes (5.03) | Apr 30, 2026 | filing ↗ |
| Shareholder vote (5.07) | Apr 30, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Apr 30, 2026 | filing ↗ |
| Earnings (2.02) | Feb 5, 2026 | filing ↗ |
| Charter/bylaw changes (5.03) | Feb 5, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Feb 5, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Feb 5, 2026 | filing ↗ |
| Earnings (2.02) | Jan 9, 2026 | filing ↗ |
| Officer/director changes (5.02) | Jan 9, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Jan 9, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jan 9, 2026 | filing ↗ |
| Other events (8.01) | Nov 17, 2025 | filing ↗ |
| Earnings (2.02) | Nov 3, 2025 | filing ↗ |
| Reg FD disclosure (7.01) | Nov 3, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Nov 3, 2025 | filing ↗ |
| Reg FD disclosure (7.01) | Oct 10, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Oct 10, 2025 | filing ↗ |
| Officer/director changes (5.02) | Aug 22, 2025 | filing ↗ |
| Reg FD disclosure (7.01) | Aug 22, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Aug 22, 2025 | filing ↗ |
| Other events (8.01) | Aug 11, 2025 | filing ↗ |