Arista Networks, Inc.
MX ˙ BMV ˙ US0404132054
SecurityMX:ANET / Arista Networks, Inc.
InstitutionGreat Valley Advisor Group, Inc.
Latest Disclosed Ownership76,600 shares
Latest Disclosed Value $ 9,404,762
Great Valley Advisor Group, Inc. reports 4.63% increase in ownership of ANET / Arista Networks, Inc.

On May 11, 2026 - Great Valley Advisor Group, Inc. filed a 13F-HR form disclosing ownership of 76,600 shares of Arista Networks, Inc. (MX:ANET) valued at $9,404,762 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 73,213 shares of Arista Networks, Inc.. This represents a change in shares of 4.63% 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)
2026-05-11 2026-03-31 13F ARISTA NETWORKS COM SHS 040413205 76,600 3,387 4.63 9,405 -1.96 0.1709
2026-02-12 2025-12-31 13F ARISTA NETWORKS COM SHS 040413205 73,213 324 0.44 9,593 -9.68 0.1843
2025-11-14 2025-09-30 13F ARISTA NETWORKS COM SHS 040413205 72,889 -11,235 -13.36 10,621 23.40 0.2130
2025-08-14 2025-06-30 13F ARISTA NETWORKS COM SHS 040413205 84,124 804 0.96 8,607 33.32 0.1906
2025-05-08 2025-03-31 13F ARISTA NETWORKS COM SHS 040413205 83,320 7,839 10.39 6,456 -22.63 0.1390
2025-02-24 2024-12-31 13F ARISTA NETWORKS COM SHS 040413205 75,481 56,935 306.99 8,343 17.21 0.1868
2024-11-12 2024-09-30 13F ARISTA NETWORKS COM 040413106 18,546 -563 -2.95 7,119 6.29 0.1749
2024-07-16 2024-06-30 13F ARISTA NETWORKS COM 040413106 19,109 561 3.02 6,697 24.53 0.1874
2024-05-06 2024-03-31 13F ARISTA NETWORKS COM 040413106 18,548 162 0.88 5,379 24.23 0.1633
2024-02-06 2023-12-31 13F ARISTA NETWORKS COM 040413106 18,386 2,236 13.85 4,330 45.76 0.1519
2023-11-07 2023-09-30 13F ARISTA NETWORKS COM 040413106 16,150 6,289 63.78 2,970 85.97 0.1231
2023-08-10 2023-06-30 13F ARISTA NETWORKS COM 040413106 9,861 130 1.34 1,598 -2.20 0.0670
2023-05-03 2023-03-31 13F ARISTA NETWORKS COM 040413106 9,731 135 1.41 1,633 40.29 0.0762
2023-02-01 2022-12-31 13F ARISTA NETWORKS COM 040413106 9,596 0 0.00 1,164 7.48 0.0595
2022-10-21 2022-09-30 13F ARISTA NETWORKS COM 040413106 9,596 1,026 11.97 1,083 34.70 0.0606
2022-07-19 2022-06-30 13F ARISTA NETWORKS COM 040413106 8,570 8,570 804 0.0442
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.