INSPIRE MEDICAL SYSTEMS INC (INSP) Institutional Ownership Changes & 13F Activity
INSPIRE MEDICAL SYSTEMS INC (INSP). Institutional ownership data tracks hedge funds, asset managers, and other institutional investors based on recent SEC Form 13F filings (Q2 2026). This page analyzes institutional buying and selling activity, new holdings, and sold-out positions in the latest reporting period. Notable filers include Aqr Capital Management Llc, Deerfield Management Company, L.P., Nomura Holdings Inc, Assenagon Asset Management S.A., and Millennium Management Llc.
| Institution | Type | Change in shares | Change Position % | Shares | Reported stock balance | Portfolio quarter | Filing date |
|---|---|---|---|---|---|---|---|
| Manufacturers Life Insurance Company, The | Sell | -480 | -2.3% | 20,525 | $915.62K | Q2 2026 | Sep 09, 2026 |
| Parkside Financial Bank & Trust | Buy | +101 | +206.1% | 150 | $6.69K | Q2 2026 | Sep 04, 2026 |
| Citadel Advisors Llc | Buy | +112,258 | +28.5% | 506,334 | $22.59M | Q2 2026 | Sep 02, 2026 |
| Cornerstone Financial Management Llc | Buy | +9 | — | 9 | $401.00 | Q2 2026 | Aug 28, 2026 |
| Corient Private Wealth Llc | Buy | +52,275 | +993.8% | 57,535 | $2.57M | Q2 2026 | Aug 27, 2026 |
| California State Teachers Retirement System | Sell | -4,947 | -14.4% | 29,526 | $1.32M | Q2 2026 | Aug 24, 2026 |
| Assenagon Asset Management S.A. | Buy | +344,221 | +66.2% | 864,395 | $38.56M | Q2 2026 | Aug 21, 2026 |
| Nantahala Capital Management, Llc | Buy | +269,474 | — | 269,474 | $12.02M | Q2 2026 | Aug 19, 2026 |
| Mercer Global Advisors Inc | Buy | +18,967 | +317.3% | 24,944 | $1.11M | Q2 2026 | Aug 19, 2026 |
| Fulcrum Asset Management Llp | Buy | +106 | — | 106 | $4.76K | Q2 2026 | Aug 18, 2026 |
| Empowered Funds, Llc | Buy | +15,781 | +45.2% | 50,657 | $2.26M | Q2 2026 | Aug 17, 2026 |
| Caitlin John, Llc | Buy | +19 | +190.0% | 29 | $1.29K | Q2 2026 | Aug 17, 2026 |
| Aqr Capital Management Llc | Buy | +1,548,138 | +501.6% | 1,856,800 | $80.94M | Q2 2026 | Aug 14, 2026 |
| Deerfield Management Company, L.P. | Sell | -1,406,376 | -52.0% | 1,296,862 | $57.85M | Q2 2026 | Aug 14, 2026 |
| Nomura Holdings Inc | Buy | +1,369,410 | — | 1,369,410 | $61.09M | Q2 2026 | Aug 14, 2026 |
| Millennium Management Llc | Sell | -291,997 | -75.6% | 94,149 | $4.20M | Q2 2026 | Aug 14, 2026 |
| D. E. Shaw & Co., Inc. | Buy | +281,925 | +23.7% | 1,470,462 | $65.60M | Q2 2026 | Aug 14, 2026 |
| Royal Bank Of Canada | Sell | -245,253 | -96.9% | 7,718 | $345.00K | Q2 2026 | Aug 14, 2026 |
| Barclays Plc | Buy | +239,629 | +354.3% | 307,270 | $13.71M | Q2 2026 | Aug 14, 2026 |
| Cerity Partners Llc | Sell | -161,467 | -89.0% | 19,959 | $890.37K | Q2 2026 | Aug 14, 2026 |
| Susquehanna International Group, Llp | Sell | -157,375 | -74.7% | 53,198 | $2.37M | Q2 2026 | Aug 14, 2026 |
| Wellington Management Group Llp | Sell | -153,294 | -6.0% | 2,382,660 | $106.29M | Q2 2026 | Aug 14, 2026 |
| Rock Springs Capital Management Lp | Buy | +112,200 | +85.1% | 244,000 | $10.88M | Q2 2026 | Aug 14, 2026 |
| Invesco Ltd. | Buy | +110,285 | — | 110,285 | $4.92M | Q2 2026 | Aug 14, 2026 |
| Integral Health Asset Management, Llc | Buy | +100,000 | — | 100,000 | $4.46M | Q2 2026 | Aug 14, 2026 |
| Ameriprise Financial Inc | Buy | +87,518 | — | 87,518 | $3.90M | Q2 2026 | Aug 14, 2026 |
| Bank Of America Corp | Buy | +62,733 | +33.7% | 248,802 | $11.10M | Q2 2026 | Aug 14, 2026 |
| Gotham Asset Management, Llc | Sell | -51,910 | -59.2% | 35,823 | $1.60M | Q2 2026 | Aug 14, 2026 |
| Worldquant Millennium Advisors Llc | Sell | -46,880 | -62.3% | 28,359 | $1.27M | Q2 2026 | Aug 14, 2026 |
| Squarepoint Ops Llc | Sell | -42,555 | -63.7% | 24,259 | $1.08M | Q2 2026 | Aug 14, 2026 |
Frequently asked questions about INSP activity
Which institutional owners are buying INSP?
Institutional owners buying INSP include investors who have either initiated new positions or increased their existing holdings based on recent SEC 13F filings. The activity table above highlights which funds added shares in the latest reporting periods and how their positions changed over time.
What does "buy" mean in INSP activity?
"Buy" means an investor increased their reported position in INSP compared to the prior reporting period. This reflects growing exposure to INSPIRE MEDICAL SYSTEMS INC (INSP) rather than necessarily a brand-new position (though new positions also appear as buys when prior quantity was zero).
Is institutional interest in INSP increasing?
Institutional interest in INSP can be assessed by comparing the number of tracked funds adding or increasing positions versus those trimming or exiting across the periods shown. A higher number of additions typically signals increasing participation among large filers, but it should be read alongside position sizes and the full table.
Related INSP Institutional Insights
- INSP Overview
- INSP 13F Institutional Holders
- INSP Top Institutional Shareholders
- Healthcare Sector Institutional Ownership
- Healthcare Sector Portfolio Overlap
- Institutional Portfolio Overlap & Shared Holdings
- Most Bought Healthcare Stocks By Institutional Investors
- Most Sold Healthcare Stocks By Institutional Investors
- INSP Insider Trading & SEC Form 4 Activity
- INSP Articles
- Top Institutional Investor Stock Rankings