Ross Stores, Inc.
US ˙ NasdaqGS ˙ US7782961038

SecurityROST / Ross Stores, Inc.
InstitutionOMERS ADMINISTRATION Corp
Latest Disclosed Ownership24,854 shares
Latest Disclosed Value $ 5,384,122
OMERS ADMINISTRATION Corp reports 106.50% increase in ownership of ROST / Ross Stores, Inc.

On May 15, 2026 - OMERS ADMINISTRATION Corp filed a 13F-HR form disclosing ownership of 24,854 shares of Ross Stores, Inc. (US:ROST) valued at $5,384,122 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 12,036 shares of Ross Stores, Inc.. This represents a change in shares of 106.50% during the quarter. The current value of the position is $5,781,537 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)
2026-05-15 2026-03-31 13F ROSS STORES COM 778296103 24,854 12,818 106.50 5,384 148.34 0.0346
2026-02-13 2025-12-31 13F ROSS STORES COM 778296103 12,036 0 0.00 2,168 18.21 0.0155
2025-11-14 2025-09-30 13F ROSS STORES COM 778296103 12,036 0 0.00 1,834 19.48 0.0131
2025-08-13 2025-06-30 13F ROSS STORES COM 778296103 12,036 -69,562 -85.25 1,536 -85.28 0.0121
2025-05-14 2025-03-31 13F ROSS STORES COM 778296103 81,598 -2,021 -2.42 10,427 -17.57 0.0912
2025-02-14 2024-12-31 13F ROSS STORES COM 778296103 83,619 2,385 2.94 12,649 3.46 0.1106
2024-11-13 2024-09-30 13F ROSS STORES COM 778296103 81,234 8,295 11.37 12,227 15.35 0.1125
2024-08-13 2024-06-30 13F ROSS STORES COM 778296103 72,939 18,975 35.16 10,599 33.84 0.1021
2024-05-14 2024-03-31 13F ROSS STORES COM 778296103 53,964 -17,630 -24.62 7,920 -20.07 0.0906
2024-02-13 2023-12-31 13F ROSS STORES COM 778296103 71,594 0 0.00 9,908 22.52 0.1251
2023-11-13 2023-09-30 13F ROSS STORES COM 778296103 71,594 0 0.00 8,087 0.74 0.1218
2023-08-14 2023-06-30 13F ROSS STORES COM 778296103 71,594 39,289 121.62 8,028 134.16 0.1249
2023-05-12 2023-03-31 13F ROSS STORES COM 778296103 32,305 32,305 3,429 0.0529
2020-05-15 2020-03-31 13F ROSS STORES COM 778296103 0 -70,800 -100.00 0 -100.00
2020-02-14 2019-12-31 13F ROSS STORES COM 778296103 70,800 -35,000 -33.08 8,243 -29.07 0.0951
2019-11-12 2019-09-30 13F ROSS STORES COM 778296103 105,800 13,200 14.25 11,622 24.93 0.1158
2019-08-08 2019-06-30 13F ROSS STORES COM 778296103 92,600 75,800 451.19 9,303 473.90 0.0968
2019-05-15 2019-03-31 13F ROSS STORES COM 778296103 16,800 7,800 86.67 1,621 116.42 0.0187
2019-02-14 2018-12-31 13F ROSS STORES COM 778296103 9,000 -78,400 -89.70 749 -91.35 0.0101
2018-11-14 2018-09-30 13F ROSS STORES COM 778296103 87,400 -7,500 -7.90 8,661 7.68 0.0829
2018-08-09 2018-06-30 13F ROSS STORES COM 778296103 94,900 94,900 8,043 0.0743
2018-05-11 2018-03-31 13F ROSS STORES COM 778296103 0 -65,700 -100.00 0 -100.00
2018-05-14 2017-12-31 13F/A-1 ROSS STORES COM 778296103 65,700 65,700 5,272 0.0526
2018-02-13 2017-12-31 13F ROSS STORES COM 778296103 65,700 65,700 5,272
2017-11-13 2017-09-30 13F ROSS STORES COM 778296103 0 -36,200 -100.00 0 -100.00
2017-08-08 2017-06-30 13F ROSS STORES COM 778296103 36,200 36,200 2,090 0.0264
2017-05-10 2017-03-31 13F ROSS STORES COM 778296103 0 -34,300 -100.00 0 -100.00
2017-02-09 2016-12-31 13F ROSS STORES COM 778296103 34,300 23,000 203.54 2,250 209.49 0.0419
2016-11-14 2016-09-30 13F ROSS STORES COM 778296103 11,300 11,300 727 0.0129
2016-05-12 2016-03-31 13F ROSS STORES COM 778296103 0 -19,700 -100.00 0 -100.00
2016-02-11 2015-12-31 13F ROSS STORES COM 778296103 19,700 5,900 42.75 1,060 58.45 0.0274
2015-11-12 2015-09-30 13F ROSS STORES COM 778296103 13,800 13,800 0.00 669 0.0195
2015-08-11 2015-06-30 13F ROSS STORES COM 778296103 0 -13,000 -100.00 0 -100.00
2015-05-12 2015-03-31 13F ROSS STORES COM 778296103 13,000 -8,000 -38.10 1,370 -30.77 0.0514
2015-02-11 2014-12-31 13F ROSS STORES COM 778296103 21,000 1,400 7.14 1,979 33.63 0.0599
2014-11-10 2014-09-30 13F ROSS STORES COM 778296103 19,600 15,600 390.00 1,481 393.67 0.0441
2014-02-13 2013-12-31 13F ROSS STORES COM 778296103 4,000 4,000 300 0.0110
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.