Arista Networks, Inc.
MX ˙ BMV ˙ US0404132054
SecurityMX:ANET / Arista Networks, Inc.
InstitutionWinton Capital Group Ltd
Latest Disclosed Ownership45,073 shares
Latest Disclosed Value $ 5,534,063
Winton Capital Group Ltd reports 1,687.19% increase in ownership of ANET / Arista Networks, Inc.

On May 12, 2026 - Winton Capital Group Ltd filed a 13F-HR form disclosing ownership of 45,073 shares of Arista Networks, Inc. (MX:ANET) valued at $5,534,063 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 11, 2026 disclosing 2,522 shares of Arista Networks, Inc.. This represents a change in shares of 1,687.19% 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)
2026-05-12 2026-03-31 13F ARISTA NETWORKS COM SHS 040413205 45,073 42,551 1,687.19 5,534 1,576.97 0.1941
2026-02-11 2025-12-31 13F ARISTA NETWORKS COM SHS 040413205 2,522 -66,874 -96.37 330 -96.74 0.0114
2025-11-13 2025-09-30 13F ARISTA NETWORKS COM SHS 040413205 69,396 -21,023 -23.25 10,112 9.31 0.3785
2025-08-14 2025-06-30 13F ARISTA NETWORKS COM SHS 040413205 90,419 -74,207 -45.08 9,251 -27.48 0.4727
2025-05-15 2025-03-31 13F ARISTA NETWORKS COM SHS 040413205 164,626 1,674 1.03 12,755 -29.18 0.7768
2025-02-12 2024-12-31 13F ARISTA NETWORKS COM SHS 040413205 162,952 162,205 21,714.19 18,011 6,197.55 1.1961
2024-11-12 2024-09-30 13F ARISTA NETWORKS COM 040413106 747 -7,344 -90.77 287 -89.91 0.0201
2024-08-09 2024-06-30 13F ARISTA NETWORKS COM 040413106 8,091 6,858 556.20 2,836 694.12 0.1915
2024-05-14 2024-03-31 13F ARISTA NETWORKS COM 040413106 1,233 313 34.02 358 65.28 0.0252
2024-02-12 2023-12-31 13F ARISTA NETWORKS COM 040413106 920 -1,287 -58.31 217 -46.67 0.0158
2023-11-13 2023-09-30 13F ARISTA NETWORKS COM 040413106 2,207 2,207 406 0.0334
2023-08-14 2023-06-30 13F ARISTA NETWORKS COM 040413106 0 -9,802 -100.00 0 -100.00
2023-05-12 2023-03-31 13F ARISTA NETWORKS COM 040413106 9,802 3,409 53.32 1,645 112.26 0.1003
2023-02-14 2022-12-31 13F ARISTA NETWORKS COM 040413106 6,393 -6,899 -51.90 776 -48.37 0.0511
2022-11-10 2022-09-30 13F ARISTA NETWORKS COM 040413106 13,292 7,566 132.13 1,501 179.52 0.0980
2022-08-10 2022-06-30 13F ARISTA NETWORKS COM 040413106 5,726 -108,394 -94.98 537 -96.61 0.0285
2022-05-11 2022-03-31 13F ARISTA NETWORKS COM 040413106 114,120 1,930 1.72 15,860 -1.66 0.8321
2022-02-10 2021-12-31 13F ARISTA NETWORKS COM 040413106 112,190 102,968 1,116.55 16,127 408.90 0.9769
2021-10-28 2021-09-30 13F ARISTA NETWORKS COM 040413106 9,222 1,647 21.74 3,169 15.49 0.1775
2021-08-10 2021-06-30 13F ARISTA NETWORKS COM 040413106 7,575 444 6.23 2,744 27.45 0.1473
2021-07-21 2021-03-31 13F ARISTA NETWORKS COM 040413106 7,131 1,364 23.65 2,153 28.46 0.1228
2021-02-12 2020-12-31 13F ARISTA NETWORKS COM 040413106 5,767 -18,633 -76.36 1,676 -66.81 0.1210
2020-10-30 2020-09-30 13F ARISTA NETWORKS COM 040413106 24,400 -4,329 -15.07 5,049 -16.32 0.1641
2020-08-05 2020-06-30 13F ARISTA NETWORKS COM 040413106 28,729 -360 -1.24 6,034 2.41 0.1557
2020-05-11 2020-03-31 13F ARISTA NETWORKS COM 040413106 29,089 29,089 5,892 0.1555
2019-11-08 2019-09-30 13F ARISTA NETWORKS COM 040413106 0 -907 -100.00 0 -100.00
2019-07-08 2019-06-30 13F ARISTA NETWORKS COM 040413106 907 -246 -21.34 235 -35.26 0.0046
2019-05-13 2019-03-31 13F ARISTA NETWORKS COM 040413106 1,153 -1,695 -59.52 363 -39.50 0.0073
2019-02-05 2018-12-31 13F ARISTA NETWORKS COM 040413106 2,848 717 33.65 600 5.82 0.0129
2018-11-02 2018-09-30 13F ARISTA NETWORKS COM 040413106 2,131 -240 -10.12 567 -7.20 0.0119
2018-08-20 2018-06-30 13F ARISTA NETWORKS COM 040413106 2,371 -1,363 -36.50 611 -35.89 0.0156
2018-05-21 2018-03-31 13F ARISTA NETWORKS COM 040413106 3,734 3,734 953 0.0269
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.