Inspire Medical Systems, Inc.
US ˙ NYSE ˙ US4577301090

SecurityINSP / Inspire Medical Systems, Inc.
InstitutionDimensional Fund Advisors Lp
Latest Disclosed Ownership234,670 shares
Latest Disclosed Value $ 12,102,255
Dimensional Fund Advisors Lp reports 31.26% decrease in ownership of INSP / Inspire Medical Systems, Inc.

On May 7, 2026 - Dimensional Fund Advisors Lp filed a 13F-HR form disclosing ownership of 234,670 shares of Inspire Medical Systems, Inc. (US:INSP) valued at $12,104,279 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 341,397 shares of Inspire Medical Systems, Inc.. This represents a change in shares of -31.26% during the quarter. The current value of the position is $9,490,055 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-07 2026-03-31 13F INSPIRE MED SYS COM 457730109 234,670 -106,727 -31.26 12,102 -61.57 0.0005
2026-02-12 2025-12-31 13F INSPIRE MED SYS COM 457730109 341,397 -2,321 -0.68 31,488 23.45 0.0066
2025-11-12 2025-09-30 13F INSPIRE MED SYS COM 457730109 343,718 -1,149 -0.33 25,506 -43.01 0.0055
2025-08-12 2025-06-30 13F INSPIRE MED SYS COM 457730109 344,867 67,186 24.20 44,757 1.20 0.0104
2025-05-13 2025-03-31 13F INSPIRE MED SYS COM 457730109 277,681 45,348 19.52 44,226 2.69 0.0110
2025-02-13 2024-12-31 13F INSPIRE MED SYS COM 457730109 232,333 115,024 98.05 43,069 73.98 0.0103
2024-11-07 2024-09-30 13F INSPIRE MED SYS COM 457730109 117,309 7,749 7.07 24,755 68.82 0.0060
2024-08-09 2024-06-30 13F INSPIRE MED SYS COM 457730109 109,560 48,590 79.69 14,663 11.97 0.0038
2024-05-10 2024-03-31 13F INSPIRE MED SYS COM 457730109 60,970 38,287 168.79 13,096 183.81 0.0035
2024-02-07 2023-12-31 13F INSPIRE MED SYS COM 457730109 22,683 -13,072 -36.56 4,615 -34.97 0.0013
2023-11-09 2023-09-30 13F INSPIRE MED SYS COM 457730109 35,755 250 0.70 7,096 -38.43 0.0023
2023-08-09 2023-06-30 13F INSPIRE MED SYS COM 457730109 35,505 5,600 18.73 11,524 64.61 0.0037
2023-05-12 2023-03-31 13F INSPIRE MED SYS COM 457730109 29,905 7,064 30.93 7,001 139,920.00 0.0024
2023-02-09 2022-12-31 13F INSPIRE MED SYS COM 457730109 22,841 8,988 64.88 6 -99.80 0.0017
2022-11-10 2022-09-30 13F INSPIRE MED SYS COM 457730109 13,853 2,080 17.67 2,457 14.23 0.0009
2022-08-12 2022-06-30 13F INSPIRE MED SYS COM 457730109 11,773 -3,091 -20.80 2,151 -43.62 0.0008
2022-05-13 2022-03-31 13F INSPIRE MED SYS COM 457730109 14,864 1,754 13.38 3,815 26.49 0.0012
2022-02-09 2021-12-31 13F INSPIRE MED SYS COM 457730109 13,110 3,502 36.45 3,016 34.76 0.0009
2021-11-12 2021-09-30 13F INSPIRE MED SYS COM 457730109 9,608 67 0.70 2,238 21.37 0.0007
2021-08-12 2021-06-30 13F INSPIRE MED SYS COM 457730109 9,541 -365 -3.68 1,844 -10.05 0.0006
2021-05-14 2021-03-31 13F INSPIRE MED SYS COM 457730109 9,906 9,906 2,050 0.0007
2020-05-14 2020-03-31 13F INSPIRE MED SYS COM 457730109 0 -187,059 -100.00 0 -100.00
2020-02-14 2019-12-31 13F INSPIRE MED SYS COM 457730109 187,059 -39,489 -17.43 13,882 0.42 0.0051
2019-11-12 2019-09-30 13F INSPIRE MED SYS COM 457730109 226,548 -39,894 -14.97 13,824 -14.46 0.0054
2019-08-13 2019-06-30 13F INSPIRE MED SYS COM 457730109 266,442 5,057 1.93 16,160 8.89 0.0063
2019-08-12 2019-03-31 13F/A-2 INSPIRE MED SYS COM 457730109 261,385 205,545 368.10 14,841 529.12 0.0059
2019-05-10 2019-03-31 13F INSPIRE MED SYS COM 457730109 261,385 205,545 14,841
2019-02-26 2018-12-31 13F/A-1 INSPIRE MED SYS COM 457730109 55,840 55,840 2,359 0.0011
2019-02-13 2018-12-31 13F INSPIRE MED SYS COM 457730109 55,840 2,359 0.0011
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.