Inspire Medical Systems, Inc.
US ˙ NYSE ˙ US4577301090

SecurityINSP / Inspire Medical Systems, Inc.
InstitutionAlliancebernstein L.p.
Latest Disclosed Ownership15,160 shares
Latest Disclosed Value $ 1,398,207
Alliancebernstein L.p. reports 50.52% decrease in ownership of INSP / Inspire Medical Systems, Inc.

On May 15, 2026 - Alliancebernstein L.p. filed a 13F-HR form disclosing ownership of 15,160 shares of Inspire Medical Systems, Inc. (US:INSP) valued at $781,953 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 30,636 shares of Inspire Medical Systems, Inc.. This represents a change in shares of -50.52% during the quarter. The current value of the position is $639,600 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 15,160 -15,476 -50.52 1,398 -50.51 0.0005
2026-02-17 2025-12-31 13F INSPIRE MED SYS COM 457730109 30,636 23,863 352.33 2,826 462.75 0.0009
2025-11-14 2025-09-30 13F INSPIRE MED SYS COM 457730109 6,773 346 5.38 503 -39.81 0.0002
2025-08-14 2025-06-30 13F INSPIRE MED SYS COM 457730109 6,427 -4,494 -41.15 834 -52.04 0.0003
2025-05-15 2025-03-31 13F INSPIRE MED SYS COM 457730109 10,921 3 0.03 1,739 -14.04 0.0006
2025-02-12 2024-12-31 13F INSPIRE MED SYS COM 457730109 10,918 -106 -0.96 2,024 -13.03 0.0007
2024-11-14 2024-09-30 13F INSPIRE MED SYS COM 457730109 11,024 1,215 12.39 2,327 77.29 0.0008
2024-08-14 2024-06-30 13F INSPIRE MED SYS COM 457730109 9,809 103 1.06 1,313 -37.04 0.0005
2024-05-14 2024-03-31 13F INSPIRE MED SYS COM 457730109 9,706 239 2.52 2,085 8.26 0.0007
2024-02-14 2023-12-31 13F INSPIRE MED SYS COM 457730109 9,467 384 4.23 1,926 6.83 0.0007
2023-11-14 2023-09-30 13F INSPIRE MED SYS COM 457730109 9,083 -56 -0.61 1,802 -39.24 0.0008
2023-08-15 2023-06-30 13F INSPIRE MED SYS COM 457730109 9,139 -25,576 -73.67 2,967 -63.50 0.0012
2023-05-15 2023-03-31 13F INSPIRE MED SYS COM 457730109 34,715 0 0.00 8,126 -7.08 0.0035
2023-02-15 2022-12-31 13F INSPIRE MED SYS COM 457730109 34,715 600 1.76 8,744 44.51 0.0039
2022-11-15 2022-09-30 13F INSPIRE MED SYS COM 457730109 34,115 -5 -0.01 6,051 -2.92 0.0029
2022-08-15 2022-06-30 13F INSPIRE MED SYS COM 457730109 34,120 20 0.06 6,233 -28.79 0.0028
2022-05-13 2022-03-31 13F INSPIRE MED SYS COM 457730109 34,100 100 0.29 8,753 11.90 0.0034
2022-02-14 2021-12-31 13F INSPIRE MED SYS COM 457730109 34,000 -500 -1.45 7,822 -2.64 0.0028
2021-11-10 2021-09-30 13F INSPIRE MED SYS COM 457730109 34,500 -200 -0.58 8,034 19.80 0.0032
2021-07-30 2021-06-30 13F INSPIRE MED SYS COM 457730109 34,700 -2,100 -5.71 6,706 -11.96 0.0027
2021-05-06 2021-03-31 13F INSPIRE MED SYS COM 457730109 36,800 800 2.22 7,617 12.49 0.0033
2021-02-08 2020-12-31 13F INSPIRE MED SYS COM 457730109 36,000 0 0.00 6,771 45.74 0.0032
2020-11-12 2020-09-30 13F INSPIRE MED SYS COM 457730109 36,000 -900 -2.44 4,646 44.69 0.0025
2020-08-13 2020-06-30 13F INSPIRE MED SYS COM 457730109 36,900 16,600 81.77 3,211 162.34 0.0019
2020-05-14 2020-03-31 13F INSPIRE MED SYS COM 457730109 20,300 -1,000 -4.69 1,224 -22.58 0.0009
2020-02-18 2019-12-31 13F INSPIRE MED SYS COM 457730109 21,300 0 0.00 1,581 21.62 0.0009
2019-11-14 2019-09-30 13F INSPIRE MED SYS COM 457730109 21,300 0 0.00 1,300 0.62 0.0008
2019-08-14 2019-06-30 13F INSPIRE MED SYS COM 457730109 21,300 9,500 80.51 1,292 92.84 0.0008
2019-05-14 2019-03-31 13F INSPIRE MED SYS COM 457730109 11,800 0 0.00 670 34.27 0.0004
2019-02-13 2018-12-31 13F INSPIRE MED SYS COM 457730109 11,800 0 0.00 499 0.40 0.0004
2018-11-08 2018-09-30 13F INSPIRE MED SYS COM 457730109 11,800 4,300 57.33 497 86.14 0.0003
2018-08-13 2018-06-30 13F INSPIRE MED SYS COM 457730109 7,500 7,500 267 0.0002
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.