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INSP · Inspire Medical Systems, Inc. · Holdings

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$68.89 +2.20 (+3.30%)
Market Cap
$1.93B
Shares
28.91M
Volume · Oct 9 867.38K Avg daily vol (3M) 800.16K

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Some SEC filings for this period have not finished importing. Holder totals and changes may be incomplete; these filings remain queued for recovery.
The Sep 30, 2026 filing window is still open — showing the latest known positions. Funds that have not filed yet carry their prior-quarter positions; a fund that filed without this stock counts as sold out. Each fund's Change is measured against its own previous reported quarter, shown in the Reported column. Pick a completed quarter in the Quarter selector below to put every fund on one quarter and see the stock-wide activity breakdown.
Holders: 276
Total Value: $1,661,380,737
Total Shares: 37,238,647
Showing 1–100 of 281 holdings by value · page 1 of 3

Institutional Ownership Trend

27 quarters

Holder Concentration

Across 277 13F filers
Top Holder
12.7%
Sep 2023 → Jun 2026 · range 9.4% – 13.5%
of institutional value
Top 5
34.9%
Sep 2023 → Jun 2026 · range 31.7% – 39.2%
of institutional value
Top 10
53.8%
Sep 2023 → Jun 2026 · range 44.3% – 53.8%
of institutional value
HHI
412
Sep 2023 → Jun 2026 · range 317 – 416
Broadly held
Showing 100 of 281
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Holder Value (USD) % of 13F Shares Open
Key facts CIK 1609550 CUSIP 457730109 13F (30d) 15 filings 13 filers Visit website Investor relations