Ross Stores, Inc.
MX ˙ BMV ˙ US7782961038
SecurityMX:ROST / Ross Stores, Inc.
InstitutionWestport Asset Management Inc
Latest Disclosed Ownership17,000 shares
Latest Disclosed Value $ 3,682,710
Westport Asset Management Inc ownership in ROST / Ross Stores, Inc.

On May 15, 2026 - Westport Asset Management Inc filed a 13F-HR form disclosing ownership of 17,000 shares of Ross Stores, Inc. (MX:ROST) valued at $3,682,710 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 4, 2026 disclosing 17,000 shares of Ross Stores, Inc.. This represents a change in shares of 0.00% 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)
2026-05-15 2026-03-31 13F Ross Stores COM 778296103 17,000 0 0.00 3,683 42.16 1.6262
2026-02-04 2025-12-31 13F Ross Stores COM 778296103 17,000 0 0.00 2,591 0.00 1.0807
2025-11-12 2025-09-30 13F Ross Stores COM 778296103 17,000 0 0.00 2,591 19.46 1.0804
2025-08-12 2025-06-30 13F Ross Stores COM 778296103 17,000 0 0.00 2,169 -0.18 0.9586
2025-05-14 2025-03-31 13F Ross Stores COM 778296103 17,000 0 0.00 2,172 -15.52 1.0537
2025-02-14 2024-12-31 13F Ross Stores COM 778296103 17,000 0 0.00 2,572 0.51 1.2306
2024-11-13 2024-09-30 13F Ross Stores COM 778296103 17,000 0 0.00 2,559 3.56 1.1995
2024-08-12 2024-06-30 13F Ross Stores COM 778296103 17,000 0 0.00 2,470 -0.96 1.2364
2024-05-14 2024-03-31 13F Ross Stores COM 778296103 17,000 0 0.00 2,495 6.04 1.2457
2024-02-09 2023-12-31 13F Ross Stores COM 778296103 17,000 0 0.00 2,353 22.50 1.2659
2023-11-13 2023-09-30 13F Ross Stores COM 778296103 17,000 0 0.00 1,920 0.73 1.1326
2023-08-14 2023-06-30 13F Ross Stores COM 778296103 17,000 0 0.00 1,906 5.65 1.0694
2023-05-15 2023-03-31 13F Ross Stores COM 778296103 17,000 0 0.00 1,804 -8.57 1.0832
2023-02-14 2022-12-31 13F Ross Stores COM 778296103 17,000 0 0.00 1,973 37.68 1.2603
2022-11-14 2022-09-30 13F Ross Stores COM 778296103 17,000 0 0.00 1,433 20.02 0.9072
2022-08-15 2022-06-30 13F Ross Stores COM 778296103 17,000 0 0.00 1,194 -38.55 0.7148
2022-05-12 2022-03-31 13F Ross Stores COM 778296103 17,000 0 0.00 1,943 0.00 0.8799
2022-02-14 2021-12-31 13F Ross Stores COM 778296103 17,000 0 0.00 1,943 5.03 0.8799
2021-11-12 2021-09-30 13F Ross Stores COM 778296103 17,000 -3,000 -15.00 1,850 -25.40 0.8992
2021-08-11 2021-06-30 13F Ross Stores COM 778296103 20,000 0 0.00 2,480 3.42 1.0896
2021-05-11 2021-03-31 13F Ross Stores COM 778296103 20,000 0 0.00 2,398 -2.36 1.0951
2021-02-11 2020-12-31 13F Ross Stores COM 778296103 20,000 0 0.00 2,456 31.62 1.2182
2020-11-10 2020-09-30 13F Ross Stores COM 778296103 20,000 0 0.00 1,866 9.44 1.1407
2020-08-12 2020-06-30 13F Ross Stores COM 778296103 20,000 0 0.00 1,705 -1.96 1.0905
2020-05-08 2020-03-31 13F Ross Stores COM 778296103 20,000 0 0.00 1,739 -25.30 1.4294
2020-02-11 2019-12-31 13F Ross Stores COM 778296103 20,000 0 0.00 2,328 5.96 1.5759
2019-11-12 2019-09-30 13F Ross Stores COM 778296103 20,000 0 0.00 2,197 10.85 1.5770
2019-08-09 2019-06-30 13F Ross Stores COM 778296103 20,000 0 0.00 1,982 6.44 1.3548
2019-05-13 2019-03-31 13F Ross Stores COM 778296103 20,000 0 0.00 1,862 11.90 1.3015
2019-02-07 2018-12-31 13F Ross Stores COM 778296103 20,000 0 0.00 1,664 6.67 1.3876
2018-11-15 2018-09-30 13F Ross Stores COM 778296103 20,000 0 0.00 1,560 0.00 1.1000
2018-08-14 2018-06-30 13F Ross Stores COM 778296103 20,000 0 0.00 1,560 0.00 1.1079
2018-05-02 2018-03-31 13F Ross Stores COM 778296103 20,000 0 0.00 1,560 20.84 1.1111
2018-02-22 2017-12-31 13F Ross Stores COM 778296103 20,000 0 0.00 1,291 0.00 0.9748
2017-11-15 2017-09-30 13F Ross Stores COM 778296103 20,000 0 0.00 1,291 11.77 0.9728
2017-08-03 2017-06-30 13F Ross Stores COM 778296103 20,000 0 0.00 1,155 -12.30 0.9927
2017-05-03 2017-03-31 13F Ross Stores COM 778296103 20,000 0 0.00 1,317 0.38 1.1994
2017-03-09 2016-12-31 13F Ross Stores COM 778296103 20,000 20,000 1,312 1.3168
2014-11-13 2014-09-30 13F Ross Stores COM 778296103 0 -118,726 -100.00 0 -100.00
2014-08-14 2014-06-30 13F Ross Stores COM 778296103 118,726 0 0.00 7,851 -7.60 2.9818
2014-05-09 2014-03-31 13F Ross Stores COM 778296103 118,726 0 0.00 8,497 -4.49 2.9024
2014-02-11 2013-12-31 13F Ross Stores COM 778296103 118,726 0 0.00 8,896 2.93 3.1164
2013-11-14 2013-09-30 13F Ross Stores COM 778296103 118,726 0 0.00 8,643 12.32 2.2759
2013-08-08 2013-06-30 13F Ross Stores COM 778296103 118,726 118,726 7,695 2.2290
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.