INSP
Inspire Medical Systems, Inc.Marquee-fund ownership over time
Current holders
Sorted by tenure (longest first)| Fund | First disclosed | Held | Entry price | Latest close | Return on entry |
|---|---|---|---|---|---|
| Bridgewater Associates | Q2 2021 | 21Q | $171 | $42 | -76% |
| Renaissance Technologies | Q3 2024(8Q snapshot) | 7Q | $193 | $42 | -78% |
| Citadel Advisors | Q3 2024(8Q snapshot) | 7Q | $190 | $42 | -78% |
| Two Sigma Investments | Q3 2024(8Q snapshot) | 7Q | $190 | $42 | -78% |
| D.E. Shaw | Q3 2024(8Q snapshot) | 7Q | $190 | $42 | -78% |
| AQR Capital Management | Q3 2024(8Q snapshot) | 7Q | $190 | $42 | -78% |
| Millennium Management re-entered | Q3 2024(8Q snapshot) | 7Q | $190 | $42 | -78% |
“Return on entry” is the price-only move from the fund's first disclosure to today — it ignores any adds, trims, or dividends. A fund that built its position over multiple quarters has a true cost basis somewhere between entry price and latest close; this figure is the upper bound.
Past holders
Funds that exited at some point| Fund | Last entry | Exited | Entry → Exit | Return |
|---|---|---|---|---|
| Point72 Asset Management 2× in & out | Q3 2025 | Q1 2026 | → $60 | -29% |
| Viking Global Investors | Q2 2022 | Q3 2023 | → $251 | +54% |
Insider activity
Form 4 — officers, directors, 10%+ ownersFiled within two business days of each transaction by anyone with material insider status at Inspire Medical Systems, Inc.. Pair with the holders table above as a sanity check: heavy insider buying alongside marquee-fund accumulation is the strongest accumulation signal; heavy insider selling alongside fund exits is the strongest distribution signal.
30d / 90d windows measured from May 19, 2026 — the most recent Form 4 on file — not from today.
- Form 40001104659-26-063812May 19, 2026
- Form 40001104659-26-062498May 15, 2026
- Form 40001104659-26-058634May 11, 2026
- Form 40001104659-26-055066May 4, 2026
- Form 40001104659-26-055065May 4, 2026
- Form 40001104659-26-055064May 4, 2026
- Form 40001104659-26-055063May 4, 2026
- Form 40001104659-26-055061May 4, 2026
- Form 40001104659-26-055059May 4, 2026
- Form 40001104659-26-055058May 4, 2026
- Form 40001104659-26-055057May 4, 2026
- Form 40001104659-26-044369Apr 16, 2026
- Form 40001104659-26-044368Apr 16, 2026
- Form 40001104659-26-044367Apr 16, 2026
- Form 40001104659-26-044359Apr 16, 2026
Fundamentals
XBRL · Inspire Medical Systems, Inc.Annual figures sourced directly from Inspire Medical Systems, Inc.'s 10-K / 10-Q filings via SEC EDGAR XBRL. Latest fiscal year and the year-over-year change, with up to ten years of history.
Recent SEC filings
10-K · 10-Q · 8-K · 13D/G · proxyThe most recent material filings for Inspire Medical Systems, Inc. — earnings, material events, ownership disclosures, proxy statements. Form 4 insider activity is shown in the panel above.
- 8-KMaterial eventMay 5, 2026
- 10-QQuarterly reportMay 4, 2026
- 8-KMaterial eventMay 4, 2026
- DEF 14AProxy statementMar 20, 2026
- 10-KAnnual reportFeb 13, 2026
- 8-KMaterial eventFeb 11, 2026
- 8-KMaterial eventJan 12, 2026
- 8-KMaterial eventNov 17, 2025
- 10-QQuarterly reportNov 3, 2025
- 8-KMaterial eventNov 3, 2025
- 8-KMaterial eventOct 10, 2025
- 8-KMaterial eventAug 26, 2025
- 8-KMaterial eventAug 11, 2025
- 10-QQuarterly reportAug 4, 2025
- 8-KMaterial eventAug 4, 2025
Trade history
Every open→close lifecycle across tracked funds| Fund | Open date | Close date | Open price | Close price / current | Return |
|---|---|---|---|---|---|
| Millennium Management | Q4 2025 | open | $86 | $42 | -52% |
| Point72 Asset Management | Q3 2025 | Q1 2026 | $85 | $60 | -29% |
| Citadel Advisors | Q3 2024 | open | $190 | $42 | -78% |
| Two Sigma Investments | Q3 2024 | open | $190 | $42 | -78% |
| D.E. Shaw | Q3 2024 | open | $190 | $42 | -78% |
| AQR Capital Management | Q3 2024 | open | $190 | $42 | -78% |
| Millennium Management | Q3 2024 | Q3 2025 | $190 | $85 | -56% |
| Point72 Asset Management | Q3 2024 | Q1 2025 | $190 | $186 | -2% |
| Renaissance Technologies | Q3 2024 | open | $193 | $42 | -78% |
| Viking Global Investors | Q2 2022 | Q3 2023 | $164 | $251 | +54% |
| Bridgewater Associates | Q2 2021 | open | $171 | $41 | -76% |
- Covers only the 27 marquee funds tracked here, not the full institutional universe. A “0 holders” reading does not mean unowned.
- Heavy funds (Renaissance Technologies, Citadel Advisors, Soros Fund Management, Two Sigma Investments, D.E. Shaw, AQR Capital Management, Millennium Management, Point72 Asset Management) use 8-quarter snapshots, so their pre-2024 history is missing.
- “Current” reflects each fund's most recent 13F — filings lag the actual trade by up to 45 days; positions shown may have changed since.
- Cost = price at the entry filing date. Re-entered positions show the most recent open lot.
- Options, ADRs, and unmapped CUSIPs are excluded from the follower-backtest pipeline that produces these snapshots, so certain holding types won't appear here.