Arista Networks, Inc.
MX ˙ BMV ˙ US0404132054
SecurityMX:ANET / Arista Networks, Inc.
InstitutionNational Pension Service
Latest Disclosed Ownership3,011,484 shares
Latest Disclosed Value $ 369,750,006
National Pension Service reports 0.03% decrease in ownership of ANET / Arista Networks, Inc.

On May 12, 2026 - National Pension Service filed a 13F-HR form disclosing ownership of 3,011,484 shares of Arista Networks, Inc. (MX:ANET) valued at $369,750,006 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 10, 2026 disclosing 3,012,415 shares of Arista Networks, Inc.. This represents a change in shares of -0.03% 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)
2026-05-12 2026-03-31 13F ARISTA NETWORKS COM SHS 040413205 3,011,484 -931 -0.03 369,750 -6.33 0.2808
2026-02-10 2025-12-31 13F ARISTA NETWORKS ARISTA NETWORKS INC 040413205 3,012,415 -82,776 -2.67 394,717 -12.48 0.2922
2025-11-04 2025-09-30 13F ARISTA NETWORKS COM SHS 040413205 3,095,191 68,479 2.26 451,000 45.64 0.3502
2025-08-08 2025-06-30 13F ARISTA NETWORKS COM SHS 040413205 3,026,712 102,776 3.51 309,663 36.69 0.2673
2025-05-13 2025-03-31 13F ARISTA NETWORKS COM SHS 040413205 2,923,936 203,340 7.47 226,547 -24.66 0.2177
2025-02-05 2024-12-31 13F ARISTA NETWORKS COM SHS 040413205 2,720,596 2,105,495 342.30 300,707 27.37 0.2846
2024-10-30 2024-09-30 13F ARISTANETWORKSINC COM 040413106 615,101 66,016 12.02 236,088 22.68 0.2277
2024-08-13 2024-06-30 13F ARISTA NETWORKS COM 040413106 549,085 5,927 1.09 192,443 22.18 0.2211
2024-05-14 2024-03-31 13F ARISTA NETWORKS COM 040413106 543,158 -969 -0.18 157,505 22.91 0.1890
2024-02-07 2023-12-31 13F ARISTA NETWORKS COM 040413106 544,127 12,100 2.27 128,147 35.38 0.1785
2023-11-15 2023-09-30 13F ARISTA NETWORKS COM 040413106 532,027 6,032 1.15 94,658 12.98 0.1515
2023-08-16 2023-06-30 13F ARISTA NETWORKS COM 040413106 525,995 177,661 51.00 83,786 48.03 0.1351
2023-05-12 2023-03-31 13F ARISTA NETWORKS COM 040413106 348,334 -2,844 -0.81 56,601 32.82 0.1031
2023-02-24 2022-12-31 13F/A-1 ARISTA NETWORKS COM 040413106 351,178 7,741 2.25 42,615 8.14 0.0838
2023-02-21 2022-12-31 13F ARISTA NETWORKS COM 040413106 351,178 7,741 43 0.0838
2023-02-24 2022-09-30 13F/A-1 ARISTA NETWORKS COM 040413106 343,437 3,277 0.96 39,409 23.59 0.0822
2022-11-18 2022-09-30 13F ARISTA NETWORKS COM 040413106 343,437 3,277 39,409 0.0822
2022-08-17 2022-06-30 13F ARISTA NETWORKS COM 040413106 340,160 3,300 0.98 31,887 -31.89 0.0657
2022-05-13 2022-03-31 13F ARISTA NETWORKS COM 040413106 336,860 -1,400 -0.41 46,817 -3.72 0.0855
2022-02-15 2021-12-31 13F ARISTA NETWORKS COM 040413106 338,260 240,152 244.78 48,625 44.23 0.0848
2021-11-18 2021-09-30 13F ARISTA NETWORKS COM 040413106 98,108 141 0.14 33,714 -5.01 0.0642
2021-08-17 2021-06-30 13F ARISTA NETWORKS COM 040413106 97,967 549 0.56 35,494 20.69 0.0674
2021-05-14 2021-03-31 13F ARISTA NETWORKS COM 040413106 97,418 3,274 3.48 29,410 7.51 0.0615
2021-02-19 2020-12-31 13F ARISTA NETWORKS COM 040413106 94,144 -1,491 -1.56 27,355 39.50 0.0624
2020-11-13 2020-09-30 13F ARISTA NETWORKS COM 040413106 95,635 0 0.00 19,610 -2.37 0.0515
2020-08-11 2020-06-30 13F ARISTA NETWORKS COM 040413106 95,635 7,295 8.26 20,086 12.26 0.0574
2020-05-27 2020-03-31 13F ARISTA NETWORKS COM 040413106 88,340 0 0.00 17,893 -0.42 0.0606
2020-02-21 2019-12-31 13F ARISTA NETWORKS COM 040413106 88,340 12,377 16.29 17,968 -1.00 0.0493
2019-11-15 2019-09-30 13F ARISTA NETWORKS COM 040413106 75,963 3,964 5.51 18,149 -2.90 0.0574
2019-08-14 2019-06-30 13F ARISTA NETWORKS COM 040413106 71,999 3,714 5.44 18,692 -12.95 0.0625
2019-05-15 2019-03-31 13F ARISTA NETWORKS COM 040413106 68,285 2,788 4.26 21,473 36.16 0.0826
2019-02-15 2018-12-31 13F ARISTA NETWORKS COM 040413106 65,497 3,362 5.41 15,770 -4.53 0.0651
2018-11-15 2018-09-30 13F ARISTA NETWORKS COM 040413106 62,135 -89 -0.14 16,519 2.79 0.0672
2018-08-14 2018-06-30 13F ARISTA NETWORKS COM 040413106 62,224 5,614 9.92 16,071 11.19 0.0727
2018-04-13 2018-03-31 13F ARISTA NETWORKS COM 040413106 56,610 56,190 13,378.57 14,453 14,498.99 0.0716
2018-01-17 2017-12-31 13F ARISTA NETWORKS COM 040413106 420 420 99 0.0005
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.