로스 스토어스, Inc.
MX ˙ BMV ˙ US7782961038
SecurityMX:ROST / Ross Stores, Inc.
InstitutionRenaissance Technologies Llc
ManagerJames Simons
Latest Disclosed Ownership41,300 shares
Latest Disclosed Value $ 8,946,819
Renaissance Technologies Llc ownership in ROST / Ross Stores, Inc.

On May 14, 2026 - Renaissance Technologies Llc filed a 13F-HR form disclosing ownership of 41,300 shares of Ross Stores, Inc. (MX:ROST) valued at $8,946,819 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 0 shares of Ross Stores, Inc..

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)
2026-05-14 2026-03-31 13F ROSS STORES COM 778296103 41,300 41,300 8,947 0.0140
2026-02-12 2025-12-31 13F ROSS STORES COM 778296103 0 -214,633 -100.00 0 -100.00
2025-11-13 2025-09-30 13F ROSS STORES COM 778296103 214,633 -157,600 -42.34 32,708 -31.13 0.0432
2025-08-13 2025-06-30 13F ROSS STORES COM 778296103 372,233 -188,300 -33.59 47,489 -33.70 0.0632
2025-05-14 2025-03-31 13F ROSS STORES COM 778296103 560,533 263,728 88.86 71,631 59.54 0.1084
2025-02-13 2024-12-31 13F ROSS STORES COM 778296103 296,805 -579,623 -66.13 44,898 -65.96 0.0665
2024-11-13 2024-09-30 13F ROSS STORES COM 778296103 876,428 147,600 20.25 131,911 24.55 0.1984
2024-08-09 2024-06-30 13F ROSS STORES COM 778296103 728,828 130,828 21.88 105,913 121,639.08 0.1796
2024-05-13 2024-03-31 13F ROSS STORES COM 778296103 598,000 27,300 4.78 88 11.54 0.1379
2024-02-13 2023-12-31 13F ROSS STORES COM 778296103 570,700 74,000 14.90 79 39.29 0.1222
2023-11-14 2023-09-30 13F ROSS STORES COM 778296103 496,700 -386,686 -43.77 56 -43.43 0.0956
2023-08-11 2023-06-30 13F ROSS STORES COM 778296103 883,386 -947,942 -51.76 99 -48.97 0.1428
2023-05-12 2023-03-31 13F ROSS STORES COM 778296103 1,831,328 1,348,400 279.21 194 246.43 0.2579
2023-02-13 2022-12-31 13F ROSS STORES COM 778296103 482,928 482,928 56 0.0767
2022-11-14 2022-09-30 13F ROSS STORES COM 778296103 0 -228,328 -100.00 0 -100.00
2022-08-12 2022-06-30 13F ROSS STORES COM 778296103 228,328 -92,800 -28.90 16,035 -44.80 0.0190
2022-05-13 2022-03-31 13F ROSS STORES COM 778296103 321,128 321,128 29,049 0.0341
2021-11-12 2021-09-30 13F ROSS STORES COM 778296103 0 -34,528 -100.00 0 -100.00
2021-08-13 2021-06-30 13F ROSS STORES COM 778296103 34,528 34,528 4,281 0.0053
2021-02-10 2020-12-31 13F ROSS STORES COM 778296103 0 -470,828 -100.00 0 -100.00
2020-11-13 2020-09-30 13F ROSS STORES COM 778296103 470,828 212,400 82.19 43,938 99.46 0.0439
2020-08-13 2020-06-30 13F ROSS STORES COM 778296103 258,428 -39,371 -13.22 22,028 -14.95 0.0190
2020-05-14 2020-03-31 13F ROSS STORES COM 778296103 297,799 268,799 926.89 25,900 667.18 0.0252
2020-02-13 2019-12-31 13F ROSS STORES COM 778296103 29,000 -671,228 -95.86 3,376 -95.61 0.0026
2019-11-13 2019-09-30 13F ROSS STORES COM 778296103 700,228 220,700 46.02 76,920 61.83 0.0651
2019-08-12 2019-06-30 13F ROSS STORES COM 778296103 479,528 479,528 -31.52 47,531 -38.21 0.0418
2019-02-12 2018-12-31 13F ROSS STORES COM 778296103 0 -271,828 -100.00 0 -100.00
2018-11-13 2018-09-30 13F ROSS STORES COM 778296103 271,828 271,828 26,938 0.0277
2018-05-14 2018-03-31 13F ROSS STORES COM 778296103 0 -955,028 -100.00 0 -100.00
2018-02-13 2017-12-31 13F ROSS STORES COM 778296103 955,028 -1,441,500 -60.15 76,641 -50.47 0.0845
2017-11-13 2017-09-30 13F ROSS STORES COM 778296103 2,396,528 823,400 52.34 154,744 70.39 0.1821
2017-08-11 2017-06-30 13F ROSS STORES COM 778296103 1,573,128 1,254,028 392.99 90,817 332.07 0.1159
2017-05-12 2017-03-31 13F ROSS STORES COM 778296103 319,100 -100,228 -23.90 21,019 -23.59 0.0294
2017-02-13 2016-12-31 13F ROSS STORES COM 778296103 419,328 419,328 27,508 0.0435
2016-11-14 2016-09-30 13F ROSS STORES COM 778296103 0 -451,528 -100.00 0 -100.00
2016-08-12 2016-06-30 13F ROSS STORES COM 778296103 451,528 451,528 0.00 25,597 0.0487
2016-02-11 2015-12-31 13F ROSS STORES COM 778296103 0 -106,428 -100.00 0 -100.00
2015-11-12 2015-09-30 13F ROSS STORES COM 778296103 106,428 -518,000 -82.96 5,159 -83.00 0.0123
2015-08-14 2015-06-30 13F ROSS STORES COM 778296103 624,428 624,428 486.71 30,353 488.35 0.0692
2015-02-13 2014-12-31 13F ROSS STORES COM 778296103 0 -672,064 -100.00 0 -100.00
2014-11-12 2014-09-30 13F ROSS STORES COM 778296103 672,064 239,000 55.19 50,795 77.36 0.1391
2014-08-13 2014-06-30 13F ROSS STORES COM 778296103 433,064 391,764 948.58 28,639 825.33 0.0668
2014-02-14 2013-12-31 13F ROSS STORES COM 778296103 41,300 -515,900 -92.59 3,095 -92.37 0.0074
2013-11-13 2013-09-30 13F ROSS STORES COM 778296103 557,200 224,236 67.35 40,564 87.98 0.0984
2013-08-12 2013-06-30 13F ROSS STORES COM 778296103 332,964 332,964 21,579 0.0566
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.