Ross Stores, Inc.
MX ˙ BMV ˙ US7782961038
SecurityMX:ROST / Ross Stores, Inc.
InstitutionKorea Investment CORP
Latest Disclosed Ownership332,075 shares
Latest Disclosed Value $ 71,937,407
Korea Investment CORP reports 169.97% increase in ownership of ROST / Ross Stores, Inc.

On May 13, 2026 - Korea Investment CORP filed a 13F-HR form disclosing ownership of 332,075 shares of Ross Stores, Inc. (MX:ROST) valued at $71,937,407 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 123,006 shares of Ross Stores, Inc.. This represents a change in shares of 169.97% during the quarter.

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)
2026-05-13 2026-03-31 13F ROSS STORES COM 778296103 332,075 209,069 169.97 71,937 224.65 0.1490
2026-02-13 2025-12-31 13F ROSS STORES COM 778296103 123,006 -20,606 -14.35 22,158 1.25 0.0436
2025-11-13 2025-09-30 13F ROSS STORES COM 778296103 143,612 17,000 13.43 21,885 35.49 0.0450
2025-08-13 2025-06-30 13F ROSS STORES COM 778296103 126,612 -108,633 -46.18 16,153 -46.27 0.0359
2025-05-14 2025-03-31 13F ROSS STORES COM 778296103 235,245 7,479 3.28 30,062 -12.75 0.0729
2025-02-12 2024-12-31 13F ROSS STORES COM 778296103 227,766 -24,627 -9.76 34,454 -9.30 0.0817
2024-11-13 2024-09-30 13F ROSS STORES COM 778296103 252,393 -51,266 -16.88 37,988 -13.91 0.0902
2024-08-13 2024-06-30 13F ROSS STORES COM 778296103 303,659 96,039 46.26 44,128 44.82 0.1112
2024-05-14 2024-03-31 13F ROSS STORES COM 778296103 207,620 1,200 0.58 30,470 6.67 0.0773
2024-02-13 2023-12-31 13F ROSS STORES COM 778296103 206,420 446 0.22 28,566 22.79 0.0750
2023-11-13 2023-09-30 13F ROSS STORES COM 778296103 205,974 -15,695 -7.08 23,265 -6.40 0.0685
2023-08-11 2023-06-30 13F ROSS STORES COM 778296103 221,669 -6,901 -3.02 24,856 2.46 0.0698
2023-05-12 2023-03-31 13F ROSS STORES COM 778296103 228,570 47,217 26.04 24,258 15.25 0.0706
2023-02-13 2022-12-31 13F ROSS STORES COM 778296103 181,353 81,870 82.30 21,050 151.09 0.0661
2022-11-10 2022-09-30 13F ROSS STORES COM 778296103 99,483 -917 -0.91 8,383 18.89 0.0258
2022-08-12 2022-06-30 13F ROSS STORES COM 778296103 100,400 -15,700 -13.52 7,051 -32.86 0.0216
2022-05-13 2022-03-31 13F ROSS STORES COM 778296103 116,100 -7,800 -6.30 10,502 -25.83 0.0260
2022-02-09 2021-12-31 13F ROSS STORES COM 778296103 123,900 35,300 39.84 14,159 46.82 0.0368
2021-11-12 2021-09-30 13F ROSS STORES COM 778296103 88,600 13,800 18.45 9,644 3.98 0.0288
2021-08-12 2021-06-30 13F ROSS STORES COM 778296103 74,800 -32,300 -30.16 9,275 -27.78 0.0266
2021-05-13 2021-03-31 13F ROSS STORES COM 778296103 107,100 -82,500 -43.51 12,842 -44.85 0.0405
2021-02-10 2020-12-31 13F ROSS STORES COM 778296103 189,600 99,400 110.20 23,285 176.64 0.0700
2020-11-12 2020-09-30 13F ROSS STORES COM 778296103 90,200 1,200 1.35 8,417 10.95 0.0297
2020-08-12 2020-06-30 13F ROSS STORES COM 778296103 89,000 -128,563 -59.09 7,586 -59.91 0.0279
2020-05-14 2020-03-31 13F ROSS STORES COM 778296103 217,563 62,100 39.95 18,921 4.54 0.0831
2020-02-11 2019-12-31 13F ROSS STORES COM 778296103 155,463 3,000 1.97 18,099 8.07 0.0660
2019-11-12 2019-09-30 13F ROSS STORES COM 778296103 152,463 -15,600 -9.28 16,748 0.54 0.0708
2019-08-12 2019-06-30 13F ROSS STORES COM 778296103 168,063 -29,600 -14.97 16,658 -9.48 0.0716
2019-05-15 2019-03-31 13F ROSS STORES COM 778296103 197,663 30,788 18.45 18,402 32.54 0.0828
2019-02-13 2018-12-31 13F ROSS STORES COM 778296103 166,875 -6,200 -3.58 13,884 -19.05 0.0755
2018-11-13 2018-09-30 13F ROSS STORES COM 778296103 173,075 35,428 25.74 17,152 47.03 0.0791
2018-08-13 2018-06-30 13F ROSS STORES COM 778296103 137,647 15,000 12.23 11,666 21.98 0.0532
2018-05-09 2018-03-31 13F ROSS STORES COM 778296103 122,647 -36,337 -22.86 9,564 -25.04 0.0445
2018-02-12 2017-12-31 13F ROSS STORES COM 778296103 158,984 -4,200 -2.57 12,758 21.08 0.0581
2017-10-25 2017-09-30 13F ROSS STORES COM 778296103 163,184 -6,000 -3.55 10,537 7.88 0.0487
2017-07-31 2017-06-30 13F ROSS STORES COM 778296103 169,184 -17,448 -9.35 9,767 -20.55 0.0455
2017-04-25 2017-03-31 13F ROSS STORES COM 778296103 186,632 -23,439 -11.16 12,293 -10.80 0.0610
2017-02-13 2016-12-31 13F ROSS STORES COM 778296103 210,071 -51,745 -19.76 13,781 -18.14 0.0662
2016-11-09 2016-09-30 13F ROSS STORES COM 778296103 261,816 93,916 55.94 16,835 76.88 0.0897
2016-08-12 2016-06-30 13F ROSS STORES COM 778296103 167,900 -14,100 -7.75 9,518 -9.67 0.0567
2016-05-12 2016-03-31 13F ROSS STORES COM 778296103 182,000 70,400 63.08 10,537 75.47 0.0771
2016-02-01 2015-12-31 13F ROSS STORES COM 778296103 111,600 -3,900 -3.38 6,005 7.27 0.0418
2015-11-12 2015-09-30 13F ROSS STORES COM 778296103 115,500 -18,900 -14.06 5,598 -14.31 0.0446
2015-08-13 2015-06-30 13F ROSS STORES COM 778296103 134,400 67,200 100.00 6,533 -7.73 0.0557
2015-05-11 2015-03-31 13F ROSS STORES COM 778296103 67,200 33,900 101.80 7,080 125.55 0.0552
2015-02-12 2014-12-31 13F ROSS STORES COM 778296103 33,300 500 1.52 3,139 26.62 0.0258
2014-11-14 2014-09-30 13F ROSS STORES COM 778296103 32,800 -20,700 -38.69 2,479 -29.93 0.0202
2014-08-14 2014-06-30 13F ROSS STORES COM 778296103 53,500 9,400 21.32 3,538 12.14 0.0295
2014-05-14 2014-03-31 13F ROSS STORES COM 778296103 44,100 -76,600 -63.46 3,155 -65.11 0.0279
2014-02-06 2013-12-31 13F ROSS STORES COM 778296103 120,700 -34,900 -22.43 9,044 -20.16 0.0855
2013-11-07 2013-09-30 13F/A-1 ROSS STORES COM 778296103 155,600 111,900 256.06 11,328 300.00 0.1204
2013-11-05 2013-09-30 13F ROSS STORES COM 778296103 106,500 7,753
2013-08-08 2013-06-30 13F ROSS STORES COM 778296103 43,700 43,700 2,832 0.0339
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.