Arista Networks, Inc.
MX ˙ BMV ˙ US0404132054
SecurityMX:ANET / Arista Networks, Inc.
InstitutionNissay Asset Management Corp /japan/ /adv
Latest Disclosed Ownership214,749 shares
Latest Disclosed Value $ 26,366,882
Nissay Asset Management Corp /japan/ /adv reports 1.46% increase in ownership of ANET / Arista Networks, Inc.

On May 15, 2026 - Nissay Asset Management Corp /japan/ /adv filed a 13F-HR form disclosing ownership of 214,749 shares of Arista Networks, Inc. (MX:ANET) valued at $26,366,882 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 211,666 shares of Arista Networks, Inc.. This represents a change in shares of 1.46% 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)
2026-05-15 2026-03-31 13F ARISTA NETWORKS COM SHS 040413205 214,749 3,083 1.46 26,367 -4.93 0.1397
2026-02-17 2025-12-31 13F ARISTA NETWORKS COM SHS 040413205 211,666 8,337 4.10 27,735 -6.39 0.1443
2025-11-14 2025-09-30 13F ARISTA NETWORKS COM SHS 040413205 203,329 -2,118 -1.03 29,627 40.95 0.1636
2025-08-14 2025-06-30 13F ARISTA NETWORKS COM SHS 040413205 205,447 3,622 1.79 21,019 34.42 0.1230
2025-05-15 2025-03-31 13F ARISTA NETWORKS COM SHS 040413205 201,825 9,508 4.94 15,637 -28.06 0.1016
2025-02-14 2024-12-31 13F ARISTA NETWORKS COM SHS 040413205 192,317 146,115 316.25 21,738 22.58 0.1326
2024-11-14 2024-09-30 13F ARISTA NETWORKS COM 040413106 46,202 3,012 6.97 17,733 17.15 0.1123
2024-08-14 2024-06-30 13F ARISTA NETWORKS COM 040413106 43,190 2,918 7.25 15,137 29.62 0.1002
2024-05-15 2024-03-31 13F ARISTA NETWORKS COM 040413106 40,272 976 2.48 11,678 26.19 0.0809
2024-02-14 2023-12-31 13F ARISTA NETWORKS COM 040413106 39,296 462 1.19 9,255 29.57 0.0744
2023-11-14 2023-09-30 13F ARISTA NETWORKS COM 040413106 38,834 998 2.64 7,143 16.49 0.0633
2023-08-14 2023-06-30 13F ARISTA NETWORKS COM 040413106 37,836 107 0.28 6,132 -3.19 0.0529
2023-05-15 2023-03-31 13F ARISTA NETWORKS COM 040413106 37,729 -836 -2.17 6,333 35.35 0.0566
2023-02-14 2022-12-31 13F ARISTA NETWORKS COM 040413106 38,565 576 1.52 4,680 9.09 0.0447
2022-11-14 2022-09-30 13F ARISTA NETWORKS COM 040413106 37,989 4,794 14.44 4,289 37.82 0.0450
2022-08-15 2022-06-30 13F ARISTA NETWORKS COM 040413106 33,195 8,392 33.83 3,112 -9.72 0.0310
2022-05-16 2022-03-31 13F ARISTA NETWORKS COM 040413106 24,803 588 2.43 3,447 -0.98 0.0300
2022-02-14 2021-12-31 13F ARISTA NETWORKS COM 040413106 24,215 18,505 324.08 3,481 77.42 0.0267
2021-11-10 2021-09-30 13F ARISTA NETWORKS COM 040413106 5,710 230 4.20 1,962 -1.16 0.0166
2021-08-13 2021-06-30 13F ARISTA NETWORKS COM 040413106 5,480 -516 -8.61 1,985 9.67 0.0174
2021-05-11 2021-03-31 13F ARISTA NETWORKS COM 040413106 5,996 -168 -2.73 1,810 1.06 0.0178
2021-02-08 2020-12-31 13F ARISTA NETWORKS COM 040413106 6,164 -142 -2.25 1,791 37.24 0.0269
2020-10-20 2020-09-30 13F ARISTA NETWORKS COM 040413106 6,306 115 1.86 1,305 0.38 0.0220
2020-07-27 2020-06-30 13F ARISTA NETWORKS COM 040413106 6,191 922 17.50 1,300 21.84 0.0252
2020-05-05 2020-03-31 13F ARISTA NETWORKS COM 040413106 5,269 108 2.09 1,067 1.62 0.0272
2020-02-14 2019-12-31 13F ARISTA NETWORKS COM 040413106 5,161 -31,412 -85.89 1,050 -87.98 0.0233
2019-11-14 2019-09-30 13F ARISTA NETWORKS COM 040413106 36,573 5,214 16.63 8,738 7.33 0.2162
2019-08-07 2019-06-30 13F ARISTA NETWORKS COM 040413106 31,359 918 3.02 8,141 -14.95 0.2058
2019-05-03 2019-03-31 13F ARISTA NETWORKS COM 040413106 30,441 9,445 44.98 9,572 116.37 0.2529
2019-02-06 2018-12-31 13F ARISTA NETWORKS COM 040413106 20,996 -9,954 -32.16 4,424 -46.23 0.1348
2018-10-30 2018-09-30 13F ARISTA NETWORKS COM 040413106 30,950 17,581 131.51 8,228 139.05 0.2214
2018-08-08 2018-06-30 13F ARISTA NETWORKS COM 040413106 13,369 2,929 28.06 3,442 29.16 0.1007
2018-05-14 2018-03-31 13F ARISTA NETWORKS COM 040413106 10,440 678 6.95 2,665 15.92 0.0833
2018-02-14 2017-12-31 13F ARISTA NETWORKS COM 040413106 9,762 9,762 2,299 0.0700
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.