Ross Stores, Inc.
MX ˙ BMV ˙ US7782961038
SecurityMX:ROST / Ross Stores, Inc.
InstitutionMagnetar Financial LLC
Latest Disclosed Ownership15,521 shares
Latest Disclosed Value $ 3,240,630
Magnetar Financial LLC reports 3.33% increase in ownership of ROST / Ross Stores, Inc.

On May 13, 2026 - Magnetar Financial LLC filed a 13F-HR form disclosing ownership of 15,521 shares of Ross Stores, Inc. (MX:ROST) valued at $3,240,630 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 15,021 shares of Ross Stores, Inc.. This represents a change in shares of 3.33% 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 15,521 500 3.33 3,241 19.78 0.0329
2026-02-17 2025-12-31 13F ROSS STORES COM 778296103 15,021 15,021 2,706 0.0265
2025-11-13 2025-09-30 13F ROSS STORES COM 778296103 0 -78,459 -100.00 0 -100.00
2025-08-12 2025-06-30 13F ROSS STORES COM 778296103 78,459 78,459 10,010 0.0485
2025-05-15 2025-03-31 13F ROSS STORES COM 778296103 0 -1,973 -100.00 0 -100.00
2025-02-11 2024-12-31 13F ROSS STORES COM 778296103 1,973 -14,716 -88.18 298 -88.13 0.0069
2024-11-13 2024-09-30 13F ROSS STORES COM 778296103 16,689 9,890 145.46 2,512 154.15 0.0544
2024-08-14 2024-06-30 13F ROSS STORES COM 778296103 6,799 -23,582 -77.62 988 -77.84 0.0206
2024-05-15 2024-03-31 13F ROSS STORES COM 778296103 30,381 30,381 4,459 0.0998
2024-02-13 2023-12-31 13F ROSS STORES COM 778296103 0 -32,809 -100.00 0 -100.00
2023-11-14 2023-09-30 13F ROSS STORES COM 778296103 32,809 32,809 3,706 0.0946
2023-08-11 2023-06-30 13F ROSS STORES COM 778296103 0 -28,342 -100.00 0 -100.00
2023-05-15 2023-03-31 13F ROSS STORES COM 778296103 28,342 28,342 3,008 0.0587
2022-11-14 2022-09-30 13F ROSS STORES COM 778296103 0 -22,709 -100.00 0 -100.00
2022-08-15 2022-06-30 13F ROSS STORES COM 778296103 22,709 22,709 1,595 0.0165
2022-05-16 2022-03-31 13F ROSS STORES COM 778296103 0 -1,758 -100.00 0 -100.00
2022-02-14 2021-12-31 13F ROSS STORES COM 778296103 1,758 -22,284 -92.69 201 -92.32 0.0020
2022-01-14 2021-09-30 13F/A-1 ROSS STORES COM 778296103 24,042 19,615 443.08 2,617 376.68 0.0267
2021-11-12 2021-09-30 13F ROSS STORES COM 778296103 24,042 19,615 2,617 0.0267
2021-08-06 2021-06-30 13F ROSS STORES COM 778296103 4,427 1,845 71.46 549 77.10 0.0052
2021-05-14 2021-03-31 13F ROSS STORES COM 778296103 2,582 2,582 310 0.0030
2020-11-16 2020-09-30 13F ROSS STORES COM 778296103 0 -3,583 -100.00 0 -100.00
2020-08-14 2020-06-30 13F ROSS STORES COM 778296103 3,583 3,583 305 0.0090
2019-08-14 2019-06-30 13F ROSS STORES COM 778296103 0 -6,595 -100.00 0 -100.00
2019-05-15 2019-03-31 13F ROSS STORES COM 778296103 6,595 6,595 614 0.0158
2019-02-14 2018-09-30 13F/A-1 ROSS STORES COM 778296103 0 -3,544 -100.00 0 -100.00
2018-08-14 2018-06-30 13F ROSS STORES COM 778296103 3,544 3,544 300 0.0058
2017-11-14 2017-09-30 13F ROSS STORES COM 778296103 0 -61,128 -100.00 0 -100.00
2017-08-14 2017-06-30 13F ROSS STORES COM 778296103 61,128 19,663 47.42 3,529 29.22 0.0626
2017-05-15 2017-03-31 13F ROSS STORES COM 778296103 41,465 24,233 140.63 2,731 141.68 0.0434
2017-02-14 2016-12-31 13F ROSS STORES COM 778296103 17,232 17,232 0.00 1,130 0.0154
2016-02-16 2015-12-31 13F * ROSS STORES COM 778296103 0 -11,467 -100.00 0 -100.00
2015-11-16 2015-09-30 13F * ROSS STORES COM 778296103 11,467 -2,500 -17.90 556 -18.11 0.0145
2015-08-14 2015-06-30 13F * ROSS STORES COM 778296103 13,967 13,967 679 0.0126
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.