Inspire Medical Systems, Inc. (INSP) ownership: Top institutional holder: VANGUARD GROUP INC ($272.37M). Insider activity: Net Seller (2 buys, 18 sells). 1 recent congressional STOCK Act disclosures. SEC EDGAR first-party data.
| Holder | Shares | Market Value | Reported |
|---|---|---|---|
| VANGUARD GROUP INC | 2953170.00 | $272.37M | 2025-12-31 |
| BlackRock, Inc. | 3549554.00 | $183.09M | 2026-03-31 |
| DEERFIELD MANAGEMENT COMPANY, L.P. | 2703238.00 | $139.43M | 2026-03-31 |
| WELLINGTON MANAGEMENT GROUP LLP | 2535954.00 | $130.80M | 2026-03-31 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 1637173.00 | $84.45M | 2026-03-31 |
| MORGAN STANLEY | 1450634.00 | $74.82M | 2026-03-31 |
| VANGUARD CAPITAL MANAGEMENT LLC | 1266738.00 | $65.34M | 2026-03-31 |
| FULLER & THALER ASSET MANAGEMENT, INC. | 668099.00 | $61.62M | 2025-12-31 |
| Insider | Transaction | Value | Date |
|---|---|---|---|
| Sell | null | 2026-05-15 | |
| Sell | null | 2026-05-14 | |
| Sell | null | 2026-05-08 | |
| Buy | null | 2026-05-01 | |
| Sell | null | 2026-04-30 | |
| Sell | null | 2026-04-30 | |
| Sell | null | 2026-04-30 | |
| Sell | null | 2026-04-30 |
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Institutional data from SEC Form 13F. Insider data from SEC Form 4. Congressional data from STOCK Act disclosures. Not personalized investment advice.