Arista Networks, Inc.
MX ˙ BMV ˙ US0404132054
SecurityMX:ANET / Arista Networks, Inc.
InstitutionAdvisors Asset Management, Inc.
Latest Disclosed Ownership103,071 shares
Latest Disclosed Value $ 12,655,057
Advisors Asset Management, Inc. reports 5.15% increase in ownership of ANET / Arista Networks, Inc.

On May 15, 2026 - Advisors Asset Management, Inc. filed a 13F-HR form disclosing ownership of 103,071 shares of Arista Networks, Inc. (MX:ANET) valued at $12,655,057 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 98,022 shares of Arista Networks, Inc.. This represents a change in shares of 5.15% 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 103,071 5,049 5.15 12,655 -1.46 0.2101
2026-02-12 2025-12-31 13F ARISTA NETWORKS COM SHS 040413205 98,022 346 0.35 12,844 -9.76 0.2156
2025-11-06 2025-09-30 13F ARISTA NETWORKS COM SHS 040413205 97,676 2,218 2.32 14,232 45.73 0.2416
2025-08-12 2025-06-30 13F ARISTA NETWORKS COM SHS 040413205 95,458 -2,479 -2.53 9,766 28.70 0.1749
2025-05-15 2025-03-31 13F ARISTA NETWORKS COM SHS 040413205 97,937 15,066 18.18 7,588 -17.15 0.1426
2025-02-10 2024-12-31 13F ARISTA NETWORKS COM SHS 040413205 82,871 63,367 324.89 9,160 22.35 0.1687
2024-11-08 2024-09-30 13F ARISTA NETWORKS COM 040413106 19,504 1,667 9.35 7,486 19.76 0.1375
2024-08-14 2024-06-30 13F ARISTA NETWORKS COM 040413106 17,837 3,054 20.66 6,252 45.85 0.1219
2024-05-14 2024-03-31 13F ARISTA NETWORKS COM 040413106 14,783 2,600 21.34 4,287 49.39 0.0824
2024-02-14 2023-12-31 13F ARISTA NETWORKS COM 040413106 12,183 4,500 58.57 2,869 103.04 0.0586
2023-11-14 2023-09-30 13F ARISTA NETWORKS COM 040413106 7,683 2,004 35.29 1,413 53.59 0.0305
2023-08-14 2023-06-30 13F ARISTA NETWORKS COM 040413106 5,679 1,833 47.66 920 42.64 0.0188
2023-05-12 2023-03-31 13F ARISTA NETWORKS COM 040413106 3,846 1,364 54.96 646 114.29 0.0131
2023-02-13 2022-12-31 13F ARISTA NETWORKS COM 040413106 2,482 1,152 86.62 301 100.67 0.0062
2022-11-08 2022-09-30 13F ARISTA NETWORKS COM 040413106 1,330 -146 -9.89 150 8.70 0.0032
2022-08-08 2022-06-30 13F ARISTA NETWORKS COM 040413106 1,476 252 20.59 138 -18.82 0.0026
2022-05-17 2022-03-31 13F ARISTA NETWORKS COM 040413106 1,224 789 181.38 170 169.84 0.0026
2022-02-15 2021-12-31 13F ARISTA NETWORKS COM 040413106 435 321 281.58 63 61.54 0.0009
2021-11-12 2021-09-30 13F ARISTA NETWORKS COM 040413106 114 -53 -31.74 39 -36.07 0.0006
2021-07-30 2021-06-30 13F ARISTA NETWORKS COM 040413106 167 -451 -72.98 61 -67.38 0.0009
2021-05-07 2021-03-31 13F ARISTA NETWORKS COM 040413106 618 -375 -37.76 187 -35.29 0.0029
2021-02-12 2020-12-31 13F ARISTA NETWORKS COM 040413106 993 -1,098 -52.51 289 -33.26 0.0048
2020-11-16 2020-09-30 13F ARISTA NETWORKS COM 040413106 2,091 -824 -28.27 433 -29.25 0.0080
2020-08-12 2020-06-30 13F ARISTA NETWORKS COM 040413106 2,915 -842 -22.41 612 -19.58 0.0119
2020-05-15 2020-03-31 13F ARISTA NETWORKS COM 040413106 3,757 -1,876 -33.30 761 -33.60 0.0181
2020-05-20 2019-12-31 13F/A-1 ARISTA NETWORKS COM 040413106 5,633 30 0.54 1,146 -14.41 0.0201
2020-02-14 2019-12-31 13F ARISTA NETWORKS COM 040413106 5,633 30 1,146 10,143.1835
2019-11-14 2019-09-30 13F ARISTA NETWORKS COM 040413106 5,603 -142 -2.47 1,339 -10.25 0.0247
2019-11-14 2019-06-30 13F/A-1 ARISTA NETWORKS COM 040413106 5,745 -558 -8.85 1,492 -24.72 0.0269
2019-08-14 2019-06-30 13F ARISTA NETWORKS COM 040413106 5,745 -558 1,492
2019-05-15 2019-03-31 13F ARISTA NETWORKS COM 040413106 6,303 -1,902 -23.18 1,982 14.63 0.0353
2019-02-06 2018-12-31 13F/A-1 ARISTA NETWORKS COM 040413106 8,205 -1,776 -17.79 1,729 -34.85 0.0348
2019-01-31 2018-12-31 13F ARISTA NETWORKS COM 040413106 8,205 -1,776 1,729
2018-11-15 2018-09-30 13F ARISTA NETWORKS COM 040413106 9,981 -1,132 -10.19 2,654 -7.24 0.0434
2018-08-22 2018-06-30 13F/A-1 ARISTA NETWORKS COM 040413106 11,113 -536 -4.60 2,861 -8.94 0.0486
2018-08-15 2018-06-30 13F ARISTA NETWORKS COM 040413106 48,491 36,842 2,861
2018-05-15 2018-03-31 13F ARISTA NETWORKS COM 040413106 11,649 334 2.95 3,142 17.85 0.0526
2018-02-13 2017-12-31 13F ARISTA NETWORKS COM 040413106 11,315 62 0.55 2,666 24.93 0.0438
2017-11-07 2017-09-30 13F ARISTA NETWORKS COM 040413106 11,253 1,648 17.16 2,134 48.30 0.0357
2017-08-02 2017-06-30 13F ARISTA NETWORKS COM 040413106 9,605 1,974 25.87 1,439 42.62 0.0241
2017-05-02 2017-03-31 13F ARISTA NETWORKS COM 040413106 7,631 4,180 121.12 1,009 243.20 0.0169
2016-10-31 2016-09-30 13F ARISTA NETWORKS COM 040413106 3,451 2,253 188.06 294 281.82 0.0048
2016-08-08 2016-06-30 13F ARISTA NETWORKS COM 040413106 1,198 1,198 77 0.0012
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.