Accuray Incorporated
US ˙ NasdaqGS ˙ US0043971052

SecurityARAY / Accuray Incorporated
InstitutionDimensional Fund Advisors Lp
Latest Disclosed Ownership294,903 shares
Latest Disclosed Value $ 114,155
Dimensional Fund Advisors Lp reports 0.02% decrease in ownership of ARAY / Accuray Incorporated

On May 7, 2026 - Dimensional Fund Advisors Lp filed a 13F-HR form disclosing ownership of 294,903 shares of Accuray Incorporated (US:ARAY) valued at $114,452 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 294,963 shares of Accuray Incorporated. This represents a change in shares of -0.02% during the quarter. The current value of the position is $108,996 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 ACCURAY INC DEL COM 004397105 294,903 -60 -0.02 114 -53.09 0.0000
2026-02-12 2025-12-31 13F ACCURAY COM 004397105 294,963 -44,330 -13.07 243 -57.07 0.0001
2025-11-12 2025-09-30 13F ACCURAY COM 004397105 339,293 -94,946 -21.86 566 -4.87 0.0001
2025-08-12 2025-06-30 13F ACCURAY COM 004397105 434,239 -134,845 -23.70 595 -41.55 0.0001
2025-05-13 2025-03-31 13F ACCURAY COM 004397105 569,084 -64,982 -10.25 1,019 -18.82 0.0003
2025-02-13 2024-12-31 13F ACCURAY COM 004397105 634,066 -253,451 -28.56 1,254 -21.48 0.0003
2024-11-07 2024-09-30 13F ACCURAY COM 004397105 887,517 -461,580 -34.21 1,597 -34.95 0.0004
2024-08-09 2024-06-30 13F ACCURAY COM 004397105 1,349,097 -418,880 -23.69 2,455 -43.77 0.0006
2024-05-10 2024-03-31 13F ACCURAY COM 004397105 1,767,977 -17,212 -0.96 4,367 -13.58 0.0012
2024-02-07 2023-12-31 13F ACCURAY COM 004397105 1,785,189 8,672 0.49 5,053 4.55 0.0015
2023-11-09 2023-09-30 13F ACCURAY COM 004397105 1,776,517 119,271 7.20 4,832 -24.65 0.0016
2023-08-09 2023-06-30 13F ACCURAY COM 004397105 1,657,246 276,240 20.00 6,414 56.38 0.0020
2023-05-12 2023-03-31 13F ACCURAY COM 004397105 1,381,006 92,390 7.17 4,101 204,950.00 0.0014
2023-02-09 2022-12-31 13F ACCURAY COM 004397105 1,288,616 -171,504 -11.75 3 -99.93 0.0008
2022-11-10 2022-09-30 13F ACCURAY COM 004397105 1,460,120 -293,872 -16.75 3,037 -11.64 0.0012
2022-08-12 2022-06-30 13F ACCURAY COM 004397105 1,753,992 -306,094 -14.86 3,437 -49.60 0.0012
2022-05-13 2022-03-31 13F ACCURAY COM 004397105 2,060,086 -31,296 -1.50 6,819 -31.65 0.0021
2022-02-09 2021-12-31 13F ACCURAY COM 004397105 2,091,382 -113,857 -5.16 9,976 14.52 0.0030
2021-11-12 2021-09-30 13F ACCURAY COM 004397105 2,205,239 -280,410 -11.28 8,711 -22.47 0.0028
2021-08-12 2021-06-30 13F ACCURAY COM 004397105 2,485,649 47,865 1.96 11,236 -6.88 0.0036
2021-05-14 2021-03-31 13F ACCURAY COM 004397105 2,437,784 112,021 4.82 12,066 24.40 0.0040
2021-03-08 2020-12-31 13F/A-2 ACCURAY COM 004397105 2,325,763 -26,241 -1.12 9,699 71.82 0.0035
2021-02-11 2020-12-31 13F ACCURAY COM 004397105 2,325,763 -26,241 9,699 3,502.7633
2020-11-12 2020-09-30 13F ACCURAY COM 004397105 2,352,004 50,613 2.20 5,645 20.83 0.0024
2020-08-13 2020-06-30 13F ACCURAY COM 004397105 2,301,391 -10,886 -0.47 4,672 6.35 0.0021
2020-05-14 2020-03-31 13F ACCURAY COM 004397105 2,312,277 -88,102 -3.67 4,393 -35.10 0.0023
2020-02-14 2019-12-31 13F ACCURAY COM 004397105 2,400,379 -23,035 -0.95 6,769 0.83 0.0025
2019-11-12 2019-09-30 13F ACCURAY COM 004397105 2,423,414 45,415 1.91 6,713 -27.06 0.0026
2019-08-13 2019-06-30 13F ACCURAY COM 004397105 2,377,999 60,189 2.60 9,203 -16.76 0.0036
2019-08-12 2019-03-31 13F/A-2 ACCURAY COM 004397105 2,317,810 -3,520 -0.15 11,056 39.67 0.0044
2019-05-10 2019-03-31 13F ACCURAY COM 004397105 2,317,810 -3,520 11,056
2019-02-26 2018-12-31 13F/A-1 ACCURAY COM 004397105 2,321,330 78,330 3.49 7,916 -21.58 0.0036
2019-02-13 2018-12-31 13F ACCURAY COM 004397105 2,321,330 78,330 7,916
2018-11-13 2018-09-30 13F ACCURAY COM 004397105 2,243,000 131,283 6.22 10,094 16.59 0.0038
2018-08-10 2018-06-30 13F ACCURAY COM 004397105 2,111,717 237,612 12.68 8,658 -7.61 0.0035
2018-05-11 2018-03-31 13F ACCURAY COM 004397105 1,874,105 553,814 41.95 9,371 65.07 0.0039
2018-02-12 2017-12-31 13F ACCURAY COM 004397105 1,320,291 451,628 51.99 5,677 63.37 0.0024
2017-11-13 2017-09-30 13F ACCURAY COM 004397105 868,663 -256,140 -22.77 3,475 -34.96 0.0015
2017-08-11 2017-06-30 13F ACCURAY COM 004397105 1,124,803 266,790 31.09 5,343 31.08 0.0025
2017-05-12 2017-03-31 13F ACCURAY COM 004397105 858,013 185,519 27.59 4,076 31.78 0.0019
2017-02-09 2016-12-31 13F ACCURAY COM 004397105 672,494 25,075 3.87 3,093 -25.00 0.0015
2016-11-10 2016-09-30 13F ACCURAY COM 004397105 647,419 275,599 74.12 4,124 113.68 0.0022
2016-08-09 2016-06-30 13F ACCURAY COM 004397105 371,820 160,366 75.84 1,930 57.94 0.0011
2016-05-13 2016-03-31 13F ACCURAY COM 004397105 211,454 211,454 0.00 1,222 0.0007
2015-08-14 2015-06-30 13F ACCURAY COM 004397105 0 -48,047 -100.00 0 -100.00
2015-05-14 2015-03-31 13F ACCURAY COM 004397105 48,047 -543,222 -91.87 447 -89.99 0.0003
2015-02-06 2014-12-31 13F ACCURAY COM 004397105 591,269 -427,528 -41.96 4,464 -39.65 0.0029
2014-11-13 2014-09-30 13F ACCURAY COM 004397105 1,018,797 -343,620 -25.22 7,397 -38.31 0.0052
2014-08-08 2014-06-30 13F ACCURAY COM 004397105 1,362,417 -181,190 -11.74 11,990 -19.08 0.0083
2014-05-14 2014-03-31 13F ACCURAY COM 004397105 1,543,607 -8,585 -0.55 14,817 9.60 0.0111
2014-02-12 2013-12-31 13F ACCURAY COM 004397105 1,552,192 -8,252 -0.53 13,519 17.24 0.0105
2013-11-13 2013-09-30 13F ACCURAY COM 004397105 1,560,444 -63,807 -3.93 11,531 23.68 0.0100
2013-08-15 2013-06-30 13F ACCURAY COM 004397105 1,624,251 1,624,251 9,323 0.0088
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.