Arista Networks, Inc.
MX ˙ BMV ˙ US0404132054
SecurityMX:ANET / Arista Networks, Inc.
InstitutionAmundi
Latest Disclosed Ownership9,064,443 shares
Latest Disclosed Value $ 1,112,932,312
Amundi reports 5.73% increase in ownership of ANET / Arista Networks, Inc.

On May 15, 2026 - Amundi filed a 13F-HR form disclosing ownership of 9,064,443 shares of Arista Networks, Inc. (MX:ANET) valued at $1,112,932,312 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 8,573,270 shares of Arista Networks, Inc.. This represents a change in shares of 5.73% 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 9,064,443 491,173 5.73 1,112,932 -0.93 0.1277
2026-02-17 2025-12-31 13F ARISTA NETWORKS COM SHS 040413205 8,573,270 433,742 5.33 1,123,356 -7.68 0.3053
2025-11-14 2025-09-30 13F ARISTA NETWORKS COM SHS 040413205 8,139,528 -763,387 -8.57 1,216,859 35.15 0.3911
2025-08-13 2025-06-30 13F ARISTA NETWORKS COM SHS 040413205 8,902,915 320,806 3.74 900,352 47.15 0.3108
2025-05-15 2025-03-31 13F ARISTA NETWORKS COM SHS 040413205 8,582,109 2,240,045 35.32 611,852 -16.47 0.2227
2025-02-07 2024-12-31 13F ARISTA NETWORKS COMMSTCK 040413205 6,342,064 4,201,973 196.35 732,493 -14.46 0.2547
2024-11-13 2024-09-30 13F ARISTA NETWORKS COM 040413106 2,140,091 -178,695 -7.71 856,290 1.08 0.3156
2024-08-14 2024-06-30 13F ARISTA NETWORKS COM 040413106 2,318,786 125,840 5.74 847,152 50.13 0.3247
2024-05-15 2024-03-31 13F ARISTA NETWORKS COM 040413106 2,192,946 115,913 5.58 564,268 10.81 0.2425
2024-02-14 2023-12-31 13F ARISTA NETWORKS COM 040413106 2,077,033 17,021 0.83 509,233 30.22 0.2292
2023-11-14 2023-09-30 13F ARISTA NETWORKS COM 040413106 2,060,012 647,063 45.80 391,052 73.08 0.1922
2023-08-14 2023-06-30 13F ARISTA NETWORKS COM 040413106 1,412,949 467,444 49.44 225,940 46.73 0.1143
2023-05-15 2023-03-31 13F ARISTA NETWORKS COM 040413106 945,505 -343,213 -26.63 153,985 2.71 0.0830
2023-02-14 2022-12-31 13F ARISTA NETWORKS COM 040413106 1,288,718 531,585 70.21 149,917 63.17 0.0822
2022-11-14 2022-09-30 13F ARISTA NETWORKS COM 040413106 757,133 331,270 77.79 91,878 117.71 0.0545
2022-09-02 2022-06-30 13F/A-1 ARISTA NETWORKS COM 040413106 425,863 -286,321 -40.20 42,202 -55.39 0.0339
2022-08-15 2022-06-30 13F ARISTA NETWORKS COM 040413106 425,863 -286,321 42,202 0.0022
2022-05-16 2022-03-31 13F ARISTA NETWORKS COM 040413106 712,184 462,356 185.07 94,593 188.58 0.0640
2022-02-14 2021-12-31 13F ARISTA NETWORKS COM 040413106 249,828 173,413 226.94 32,779 24.83 0.0208
2021-11-15 2021-09-30 13F ARISTA NETWORKS COM 040413106 76,415 -10,263 -11.84 26,259 84,606.45 0.0184
2021-08-16 2021-06-30 13F ARISTA NETWORKS COM 040413106 86,678 86,678 31 0.0218
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.