Ross Stores, Inc.
MX ˙ BMV ˙ US7782961038
SecurityMX:ROST / Ross Stores, Inc.
InstitutionS.A. Mason LLC
Latest Disclosed Ownership2,150 shares
Latest Disclosed Value $ 465,755
S.A. Mason LLC ownership in ROST / Ross Stores, Inc.

On April 27, 2026 - S.A. Mason LLC filed a 13F-HR form disclosing ownership of 2,150 shares of Ross Stores, Inc. (MX:ROST) valued at $465,755 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 29, 2026 disclosing 2,150 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)
2026-04-27 2026-03-31 13F Ross Stores COM 778296103 2,150 0 0.00 466 20.16 0.1748
2026-01-29 2025-12-31 13F Ross Stores COM 778296103 2,150 0 0.00 387 18.35 0.1531
2025-10-14 2025-09-30 13F Ross Stores COM 778296103 2,150 0 0.00 328 19.34 0.1446
2025-07-14 2025-06-30 13F Ross Stores COM 778296103 2,150 0 0.00 274 0.00 0.1327
2025-04-23 2025-03-31 13F Ross Stores COM 778296103 2,150 150 7.50 275 -9.27 0.1452
2025-01-24 2024-12-31 13F Ross Stores COM 778296103 2,000 0 0.00 303 0.33 0.1589
2024-10-25 2024-09-30 13F Ross Stores COM 778296103 2,000 0 0.00 301 3.79 0.1596
2024-07-10 2024-06-30 13F Ross Stores COM 778296103 2,000 0 0.00 291 -1.02 0.1653
2024-04-15 2024-03-31 13F Ross Stores COM 778296103 2,000 0 0.00 294 6.16 0.1764
2024-01-17 2023-12-31 13F Ross Stores COM 778296103 2,000 -100 -4.76 277 16.46 0.1856
2023-10-13 2023-09-30 13F Ross Stores COM 778296103 2,100 -100 -4.55 237 1.72 0.1710
2023-07-20 2023-06-30 13F Ross Stores COM 778296103 2,200 0 0.00 233 0.00 0.1696
2023-05-10 2023-03-31 13F Ross Stores COM 778296103 2,200 0 0.00 233 -8.63 0.1696
2023-01-10 2022-12-31 13F Ross Stores COM 778296103 2,200 0 0.00 255 37.84 0.1923
2022-10-20 2022-09-30 13F Ross Stores COM 778296103 2,200 0 0.00 185 19.35 0.1463
2022-07-07 2022-06-30 13F Ross Stores COM 778296103 2,200 -100 -4.35 155 -25.48 0.1132
2022-05-12 2022-03-31 13F Ross Stores COM 778296103 2,300 0 0.00 208 -20.91 0.1297
2022-01-04 2021-12-31 13F Ross Stores COM 778296103 2,300 0 0.00 263 5.20 0.1583
2021-10-12 2021-09-30 13F Ross Stores COM 778296103 2,300 0 0.00 250 -12.28 0.1646
2021-07-07 2021-06-30 13F Ross Stores COM 778296103 2,300 0 0.00 285 3.26 0.1960
2021-04-20 2021-03-31 13F Ross Stores COM 778296103 2,300 0 0.00 276 -2.13 0.2062
2021-02-02 2020-12-31 13F Ross Stores COM 778296103 2,300 0 0.00 282 31.16 0.2348
2020-10-21 2020-09-30 13F Ross Stores COM 778296103 2,300 0 0.00 215 9.69 0.2045
2020-07-27 2020-06-30 13F Ross Stores COM 778296103 2,300 -50 -2.13 196 -3.92 0.2066
2020-05-14 2020-03-31 13F Ross Stores COM 778296103 2,350 -300 -11.32 204 -33.98 0.2476
2020-01-29 2019-12-31 13F Ross Stores COM 778296103 2,650 2,650 309 0.2945
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.