Inspire Medical Systems, Inc.
US ˙ NYSE ˙ US4577301090

SecurityINSP / Inspire Medical Systems, Inc.
InstitutionState Street Corp
Latest Disclosed Ownership956,011 shares
Latest Disclosed Value $ 49,311,047
State Street Corp reports 4.08% increase in ownership of INSP / Inspire Medical Systems, Inc.

On May 15, 2026 - State Street Corp filed a 13F-HR form disclosing ownership of 956,011 shares of Inspire Medical Systems, Inc. (US:INSP) valued at $49,311,047 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 918,504 shares of Inspire Medical Systems, Inc.. This represents a change in shares of 4.08% during the quarter. The current value of the position is $40,334,104 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)
2026-05-15 2026-03-31 13F INSPIRE MED SYS COM 457730109 956,011 37,507 4.08 49,311 -41.79 0.0017
2026-02-13 2025-12-31 13F INSPIRE MED SYS COM 457730109 918,504 -60,805 -6.21 84,714 16.58 0.0028
2025-11-14 2025-09-30 13F INSPIRE MED SYS COM 457730109 979,309 -51,593 -5.00 72,665 -45.68 0.0025
2025-08-14 2025-06-30 13F INSPIRE MED SYS COM 457730109 1,030,902 22,843 2.27 133,780 -16.68 0.0050
2025-05-15 2025-03-31 13F INSPIRE MED SYS COM 457730109 1,008,059 -54,087 -5.09 160,564 -18.45 0.0066
2025-02-14 2024-12-31 13F INSPIRE MED SYS COM 457730109 1,062,146 12,362 1.18 196,901 -11.13 0.0078
2024-11-14 2024-09-30 13F INSPIRE MED SYS COM 457730109 1,049,784 459,990 77.99 221,557 180.69 0.0090
2024-08-14 2024-06-30 13F INSPIRE MED SYS COM 457730109 589,794 59,594 11.24 78,932 -30.69 0.0034
2024-05-15 2024-03-31 13F INSPIRE MED SYS COM 457730109 530,200 -993 -0.19 113,882 5.39 0.0051
2024-02-14 2023-12-31 13F INSPIRE MED SYS COM 457730109 531,193 6,689 1.28 108,061 3.82 0.0053
2023-11-14 2023-09-30 13F INSPIRE MED SYS COM 457730109 524,504 9,812 1.91 104,083 -37.71 0.0058
2023-08-14 2023-06-30 13F INSPIRE MED SYS COM 457730109 514,692 -116,149 -18.41 167,090 13.16 0.0088
2023-05-15 2023-03-31 13F INSPIRE MED SYS COM 457730109 630,841 30,054 5.00 147,661 -2.42 0.0083
2023-05-15 2022-12-31 13F/A-99 INSPIRE MED SYS COM 457730109 600,787 15,037 2.57 151,326 45.65 0.0089
2023-05-15 2022-12-31 13F INSPIRE MED SYS COM 457730109 600,787 15,037 151,326 0.0089
2022-11-15 2022-09-30 13F INSPIRE MED SYS COM 457730109 585,750 42,571 7.84 103,894 4.71 0.0066
2022-08-15 2022-06-30 13F INSPIRE MED SYS COM 457730109 543,179 2,460 0.45 99,223 -28.51 0.0059
2022-05-16 2022-03-31 13F INSPIRE MED SYS COM 457730109 540,719 13,757 2.61 138,797 14.49 0.0069
2022-02-14 2021-12-31 13F INSPIRE MED SYS COM 457730109 526,962 8,059 1.55 121,233 0.32 0.0057
2021-11-15 2021-09-30 13F INSPIRE MED SYS COM 457730109 518,903 -3,502 -0.67 120,842 19.69 0.0064
2021-08-16 2021-06-30 13F INSPIRE MED SYS COM 457730109 522,405 27,950 5.65 100,960 -1.36 0.0053
2021-07-09 2021-03-31 13F/A-1 INSPIRE MED SYS COM 457730109 494,455 -12,085 -2.39 102,347 7.42 0.0059
2021-05-17 2021-03-31 13F INSPIRE MED SYS COM 457730109 494,455 -12,085 102,347 0.0059
2021-02-16 2020-12-31 13F INSPIRE MED SYS COM 457730109 506,540 1,623 0.32 95,275 46.22 0.0058
2020-11-10 2020-09-30 13F INSPIRE MED SYS COM 457730109 504,917 16,025 3.28 65,160 53.16 0.0044
2020-08-14 2020-06-30 13F INSPIRE MED SYS COM 457730109 488,892 216,189 79.28 42,543 158.79 0.0031
2020-06-19 2020-03-31 13F/A-1 INSPIRE MED SYS COM 457730109 272,703 -7,524 -2.68 16,439 -20.95 0.0014
2020-05-11 2020-03-31 13F INSPIRE MED SYS COM 457730109 272,703 -7,524 16,439 1,443.6752
2020-02-06 2019-12-31 13F INSPIRE MED SYS COM 457730109 280,227 8,985 3.31 20,796 25.65 0.0014
2019-11-14 2019-09-30 13F INSPIRE MED SYS COM 457730109 271,242 -10,191 -3.62 16,551 -3.03 0.0012
2019-08-14 2019-06-30 13F INSPIRE MED SYS COM 457730109 281,433 28,460 11.25 17,069 18.83 0.0013
2019-05-15 2019-03-31 13F INSPIRE MED SYS COM 457730109 252,973 55,795 28.30 14,364 72.42 0.0011
2019-02-12 2018-12-31 13F INSPIRE MED SYS COM 457730109 197,178 65,147 49.34 8,331 50.00 0.0008
2018-11-09 2018-09-30 13F INSPIRE MEDICAL SYSTEM Common Stock 457730109 132,031 6,802 5.43 5,554 24.33 0.0004
2018-08-14 2018-06-30 13F INSPIRE MEDICAL SYSTEM Common Stock 457730109 125,229 125,229 4,467 0.0004
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.