Arista Networks, Inc.
MX ˙ BMV ˙ US0404132054
SecurityMX:ANET / Arista Networks, Inc.
InstitutionNorthern Trust Corp
Latest Disclosed Ownership10,143,211 shares
Latest Disclosed Value $ 1,245,383,446
Northern Trust Corp reports 0.08% decrease in ownership of ANET / Arista Networks, Inc.

On May 14, 2026 - Northern Trust Corp filed a 13F-HR form disclosing ownership of 10,143,211 shares of Arista Networks, Inc. (MX:ANET) valued at $1,245,383,446 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 10,151,007 shares of Arista Networks, Inc.. This represents a change in shares of -0.08% 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)
2026-05-14 2026-03-31 13F ARISTA NETWORKS COM SHS 040413205 10,143,211 -7,796 -0.08 1,245,383 -6.37 0.0338
2026-02-17 2025-12-31 13F ARISTA NETWORKS COM SHS 040413205 10,151,007 -160,385 -1.56 1,330,086 -11.47 0.0350
2025-11-14 2025-09-30 13F ARISTA NETWORKS COM SHS 040413205 10,311,392 9,794 0.10 1,502,473 42.56 0.1922
2025-08-13 2025-06-30 13F ARISTA NETWORKS COM SHS 040413205 10,301,598 -13,895 -0.13 1,053,956 31.87 0.1449
2025-05-13 2025-03-31 13F ARISTA NETWORKS COM SHS 040413205 10,315,493 372,677 3.75 799,244 -27.27 0.1187
2025-02-14 2024-12-31 13F ARISTA NETWORKS COM SHS 040413205 9,942,816 7,753,991 354.25 1,098,979 30.81 0.1556
2024-11-13 2024-09-30 13F ARISTA NETWORKS COM 040413106 2,188,825 -50,756 -2.27 840,115 7.03 0.1375
2024-08-14 2024-06-30 13F ARISTA NETWORKS COM 040413106 2,239,581 -9,166 -0.41 784,928 20.37 0.1323
2024-05-14 2024-03-31 13F ARISTA NETWORKS COM 040413106 2,248,747 -63,677 -2.75 652,092 19.74 0.1127
2024-02-13 2023-12-31 13F ARISTA NETWORKS COM 040413106 2,312,424 -91,314 -3.80 544,599 23.18 0.0986
2023-11-13 2023-09-30 13F ARISTA NETWORKS COM 040413106 2,403,738 114,978 5.02 442,120 19.20 0.0856
2023-08-11 2023-06-30 13F ARISTA NETWORKS COM 040413106 2,288,760 -92,417 -3.88 370,916 -7.20 0.0713
2023-05-15 2023-03-31 13F ARISTA NETWORKS COM 040413106 2,381,177 -41,637 -1.72 399,704 35.95 0.0792
2023-02-13 2022-12-31 13F ARISTA NETWORKS COM 040413106 2,422,814 6,662 0.28 294,008 7.79 0.0617
2022-11-14 2022-09-30 13F ARISTA NETWORKS COM 040413106 2,416,152 78,887 3.38 272,760 24.49 0.0623
2022-08-12 2022-06-30 13F ARISTA NETWORKS COM 040413106 2,337,265 -3,900 -0.17 219,095 -32.66 0.0469
2022-05-13 2022-03-31 13F ARISTA NETWORKS COM 040413106 2,341,165 -7,805 -0.33 325,376 -3.64 0.0572
2022-02-08 2021-12-31 13F ARISTA NETWORKS COM 040413106 2,348,970 1,756,612 296.55 337,665 65.88 0.0553
2021-11-15 2021-09-30 13F ARISTA NETWORKS COM 040413106 592,358 15,886 2.76 203,558 -2.54 0.0360
2021-08-13 2021-06-30 13F ARISTA NETWORKS COM 040413106 576,472 -10,029 -1.71 208,862 17.96 0.0368
2021-05-12 2021-03-31 13F ARISTA NETWORKS COM 040413106 586,501 -16,911 -2.80 177,059 0.98 0.0329
2021-02-11 2020-12-31 13F ARISTA NETWORKS COM 040413106 603,412 -15,564 -2.51 175,333 36.89 0.0342
2020-11-16 2020-09-30 13F ARISTA NETWORKS COM 040413106 618,976 -12,609 -2.00 128,084 -3.44 0.0281
2020-08-14 2020-06-30 13F ARISTA NETWORKS COM 040413106 631,585 26,886 4.45 132,653 8.30 0.0314
2020-05-14 2020-03-31 13F ARISTA NETWORKS COM 040413106 604,699 14,644 2.48 122,482 2.05 0.0352
2020-02-14 2019-12-31 13F ARISTA NETWORKS COM 040413106 590,055 -24,410 -3.97 120,016 -18.25 0.0269
2019-11-13 2019-09-30 13F ARISTA NETWORKS COM 040413106 614,465 5,089 0.84 146,808 -7.20 0.0351
2019-08-13 2019-06-30 13F ARISTA NETWORKS COM 040413106 609,376 18,231 3.08 158,206 -14.89 0.0375
2019-05-13 2019-03-31 13F ARISTA NETWORKS COM 040413106 591,145 18,895 3.30 185,891 54.17 0.0459
2019-02-12 2018-12-31 13F ARISTA NETWORKS COM 040413106 572,250 24,867 4.54 120,574 -17.15 0.0338
2018-11-14 2018-09-30 13F ARISTA NETWORKS COM 040413106 547,383 230,418 72.70 145,527 78.31 0.0356
2018-09-18 2018-06-30 13F/A-1 ARISTA NETWORKS COM 040413106 316,965 2,494 0.79 81,616 1.66 0.0207
2018-08-14 2018-06-30 13F ARISTA NETWORKS COM 040413106 321,598 7,127 82,809
2018-05-09 2018-03-31 13F ARISTA NETWORKS COM 040413106 314,471 24,346 8.39 80,284 17.47 0.0209
2018-02-14 2017-12-31 13F ARISTA NETWORKS COM 040413106 290,125 4,576 1.60 68,347 26.23 0.0173
2017-11-13 2017-09-30 13F ARISTA NETWORKS COM 040413106 285,549 13,096 4.81 54,143 32.67 0.0141
2017-08-11 2017-06-30 13F ARISTA NETWORKS COM 040413106 272,453 58,422 27.30 40,810 44.16 0.0114
2017-05-12 2017-03-31 13F ARISTA NETWORKS COM 040413106 214,031 18,270 9.33 28,309 49.44 0.0082
2017-02-13 2016-12-31 13F ARISTA NETWORKS COM 040413106 195,761 12,148 6.62 18,944 21.26 0.0058
2016-11-09 2016-09-30 13F ARISTA NETWORKS COM 040413106 183,613 26,849 17.13 15,622 54.78 0.0049
2016-08-12 2016-06-30 13F ARISTA NETWORKS COM 040413106 156,764 -210 -0.13 10,093 2.11 0.0033
2016-08-19 2016-03-31 13F/A-1 ARISTA NETWORKS COM 040413106 156,974 -3,862 -2.40 9,884 -21.05 0.0033
2016-05-13 2016-03-31 13F Arista Networks COMM 040413106 156,974 9,905
2016-02-12 2015-12-31 13F Arista Networks COMM 040413106 160,836 -1,921 -1.18 12,520 25.72 0.0042
2015-11-12 2015-09-30 13F Arista Networks COMM 040413106 162,757 115,243 242.55 9,959 156.41 0.0033
2015-08-13 2015-06-30 13F ARISTA NETWORKS COM 040413106 47,514 -10,197 -17.67 3,884 -4.59 0.0026
2015-05-14 2015-03-31 13F Arista Networks COMM 040413106 57,711 18,566 47.43 4,071 71.19 0.0012
2015-02-12 2014-12-31 13F Arista Networks COM 040413106 39,145 30,700 363.53 2,378 218.77 0.0007
2014-11-13 2014-09-30 13F ARISTA NETWORKS COM 040413106 8,445 8,445 746 0.0002
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.