Arista Networks, Inc.
MX ˙ BMV ˙ US0404132054
SecurityMX:ANET / Arista Networks, Inc.
InstitutionAviva Plc
Latest Disclosed Ownership919,498 shares
Latest Disclosed Value $ 112,895,964
Aviva Plc reports 2.92% increase in ownership of ANET / Arista Networks, Inc.

On May 14, 2026 - Aviva Plc filed a 13F-HR form disclosing ownership of 919,498 shares of Arista Networks, Inc. (MX:ANET) valued at $112,895,964 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 893,384 shares of Arista Networks, Inc.. This represents a change in shares of 2.92% 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.

Upgrade to unlock premium data and export to Excel .

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)
2026-05-14 2026-03-31 13F ARISTA NETWORKS COM SHS 040413205 919,498 26,114 2.92 112,896 -3.56 0.1894
2026-02-12 2025-12-31 13F ARISTA NETWORKS COM SHS 040413205 893,384 46,881 5.54 117,060 -5.09 0.1974
2025-11-13 2025-09-30 13F ARISTA NETWORKS COM SHS 040413205 846,503 50,401 6.33 123,344 51.44 0.2242
2025-08-07 2025-06-30 13F ARISTA NETWORKS COM SHS 040413205 796,102 49,615 6.65 81,449 40.83 0.1682
2025-05-15 2025-03-31 13F ARISTA NETWORKS COM SHS 040413205 746,487 102,504 15.92 57,838 -18.74 0.1395
2025-02-13 2024-12-31 13F ARISTA NETWORKS COM SHS 040413205 643,983 514,075 395.72 71,179 42.75 0.1849
2024-11-14 2024-09-30 13F ARISTA NETWORKS COM 040413106 129,908 -5,165 -3.82 49,861 5.33 0.1292
2024-08-02 2024-06-30 13F ARISTA NETWORKS COM 040413106 135,073 1,903 1.43 47,340 22.59 0.1312
2024-05-14 2024-03-31 13F ARISTA NETWORKS COM 040413106 133,170 -23,889 -15.21 38,617 4.40 0.1271
2024-02-09 2023-12-31 13F ARISTA NETWORKS COM 040413106 157,059 -21,889 -12.23 36,989 12.38 0.1326
2023-11-13 2023-09-30 13F ARISTA NETWORKS COM 040413106 178,948 -31,943 -15.15 32,914 -3.70 0.1384
2023-08-10 2023-06-30 13F ARISTA NETWORKS COM 040413106 210,891 60,326 40.07 34,177 35.23 0.1392
2023-05-12 2023-03-31 13F ARISTA NETWORKS COM 040413106 150,565 75,119 99.57 25,274 176.06 0.1144
2023-02-14 2022-12-31 13F/A-2 ARISTA NETWORKS COM 040413106 75,446 -73,464 -49.33 9,155 -45.54 0.0450
2023-02-10 2022-12-31 13F/A-1 ARISTA NETWORKS COM 040413106 75,446 -73,464 915 0.0044
2023-02-09 2022-12-31 13F ARISTA NETWORKS COM 040413106 75,446 -73,464 9 0.0440
2022-11-14 2022-09-30 13F ARISTA NETWORKS COM 040413106 148,910 18,902 14.54 16,810 37.93 0.0969
2022-08-04 2022-06-30 13F ARISTA NETWORKS COM 040413106 130,008 55,223 73.84 12,187 17.25 0.0648
2022-05-13 2022-03-31 13F ARISTA NETWORKS COM 040413106 74,785 -20,011 -21.11 10,394 -23.72 0.0520
2022-02-10 2021-12-31 13F ARISTA NETWORKS COM 040413106 94,796 71,657 309.68 13,627 71.39 0.0571
2021-11-12 2021-09-30 13F ARISTA NETWORKS COM 040413106 23,139 3,950 20.58 7,951 14.37 0.0355
2021-08-10 2021-06-30 13F ARISTA NETWORKS COM 040413106 19,189 -4,525 -19.08 6,952 -2.89 0.0305
2021-05-13 2021-03-31 13F ARISTA NETWORKS COM 040413106 23,714 -1,901 -7.42 7,159 -3.82 0.0350
2021-02-10 2020-12-31 13F ARISTA NETWORKS COM 040413106 25,615 -4,739 -15.61 7,443 18.50 0.0387
2020-11-12 2020-09-30 13F ARISTA NETWORKS COM 040413106 30,354 -28,623 -48.53 6,281 -49.29 0.0370
2020-08-13 2020-06-30 13F/A-1 ARISTA NETWORKS COM 040413106 58,977 38,072 182.12 12,387 192.56 0.0772
2020-08-13 2020-06-30 13F ARISTA NETWORKS COM 040413106 58,977 38,072 12,387 37,500.7618
2020-05-14 2020-03-31 13F ARISTA NETWORKS COM 040413106 20,905 68 0.33 4,234 -0.09 0.0310
2020-02-10 2019-12-31 13F ARISTA NETWORKS COM 040413106 20,837 -47 -0.23 4,238 -15.07 0.0257
2019-11-12 2019-09-30 13F ARISTA NETWORKS COM 040413106 20,884 -802 -3.70 4,990 -11.37 0.0338
2019-07-30 2019-06-30 13F ARISTA NETWORKS COM 040413106 21,686 -125 -0.57 5,630 -17.92 0.0387
2019-05-14 2019-03-31 13F ARISTA NETWORKS COM 040413106 21,811 179 0.83 6,859 50.48 0.0460
2019-02-12 2018-12-31 13F ARISTA NETWORKS COM 040413106 21,632 -5,855 -21.30 4,558 -37.63 0.0340
2018-11-13 2018-09-30 13F ARISTA NETWORKS COM 040413106 27,487 -980 -3.44 7,308 -0.30 0.0401
2018-08-01 2018-06-30 13F ARISTA NETWORKS COM 040413106 28,467 1,547 5.75 7,330 6.65 0.0433
2018-05-14 2018-03-31 13F ARISTA NETWORKS COM 040413106 26,920 -2,560 -8.68 6,873 -1.04 0.0420
2018-02-13 2017-12-31 13F ARISTA NETWORKS COM 040413106 29,480 -4,090 -12.18 6,945 9.11 0.0393
2017-11-13 2017-09-30 13F ARISTA NETWORKS COM 040413106 33,570 33,570 6,365 0.0343
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.