Arista Networks, Inc.
MX ˙ BMV ˙ US0404132054
SecurityMX:ANET / Arista Networks, Inc.
InstitutionEnterprise Financial Services Corp
Latest Disclosed Ownership4,419 shares
Latest Disclosed Value $ 542,564
Enterprise Financial Services Corp reports 2.17% increase in ownership of ANET / Arista Networks, Inc.

On May 5, 2026 - Enterprise Financial Services Corp filed a 13F-HR form disclosing ownership of 4,419 shares of Arista Networks, Inc. (MX:ANET) valued at $542,564 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 14, 2026 disclosing 4,325 shares of Arista Networks, Inc.. This represents a change in shares of 2.17% 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)
2026-05-05 2026-03-31 13F ARISTA NETWORKS COM SHS 040413205 4,419 94 2.17 543 -4.24 0.1526
2026-01-14 2025-12-31 13F ARISTA NETWORKS COM SHS 040413205 4,325 37 0.86 567 -9.29 0.2877
2025-10-15 2025-09-30 13F ARISTA NETWORKS COM SHS 040413205 4,288 -8 -0.19 625 42.14 0.3221
2025-08-12 2025-06-30 13F ARISTA NETWORKS COM SHS 040413205 4,296 322 8.10 440 43.00 0.2346
2025-05-14 2025-03-31 13F ARISTA NETWORKS COM SHS 040413205 3,974 -273 -6.43 308 -34.54 0.1821
2025-02-07 2024-12-31 13F ARISTA NETWORKS COM SHS 040413205 4,247 3,206 307.97 469 17.54 0.2612
2024-11-12 2024-09-30 13F ARISTA NETWORKS COM 040413106 1,041 -4 -0.38 400 9.02 0.2328
2024-08-13 2024-06-30 13F ARISTA NETWORKS COM 040413106 1,045 -7 -0.67 366 20.00 0.2255
2024-05-14 2024-03-31 13F ARISTA NETWORKS COM 040413106 1,052 44 4.37 305 28.69 0.1836
2024-02-09 2023-12-31 13F ARISTA NETWORKS COM 040413106 1,008 1,008 237 0.1447
2021-11-15 2021-09-30 13F ARISTA NETWORKS COMMON STOCK 040413106 0 -197 -100.00 0 -100.00
2021-08-16 2021-06-30 13F ARISTA NETWORKS COMMON STOCK 040413106 197 8 4.23 71 22.41 0.0114
2021-05-13 2021-03-31 13F ARISTA NETWORKS COMMON STOCK 040413106 189 -3 -1.56 58 3.57 0.0103
2021-02-12 2020-12-31 13F ARISTA NETWORKS COMMON STOCK 040413106 192 -1 -0.52 56 40.00 0.0106
2020-11-13 2020-09-30 13F Arista Networks Common Stock 040413106 193 0 0.00 40 -2.44 0.0083
2020-08-04 2020-06-30 13F Arista Networks Common Stock 040413106 193 2 1.05 41 7.89 0.0088
2020-05-15 2020-03-31 13F Arista Networks Common Stock 040413106 191 15 8.52 38 8.57 0.0096
2020-01-28 2019-12-31 13F Arista Networks Common Stock 040413106 176 0 0.00 35 -16.67 0.0076
2019-10-31 2019-09-30 13F ARISTA NETWORKS COMMON STOCK 040413106 176 0 0.00 42 -8.70 0.0096
2019-07-30 2019-06-30 13F Arista Networks Common Stock 040413106 176 2 1.15 46 -16.36 0.0100
2019-04-26 2019-03-31 13F ARISTA NETWORKS COMMON STOCK 040413106 174 -2 -1.14 55 48.65 0.0120
2019-01-25 2018-12-31 13F ARISTA NETWORKS COMMON STOCK 040413106 176 -5 -2.76 37 -22.92 0.0233
2018-10-26 2018-09-30 13F ARISTA NETWORKS COMMON STOCK 040413106 181 0 0.00 48 2.13 0.0252
2018-07-27 2018-06-30 13F ARISTA NETWORKS COMMON STOCK 040413106 181 7 4.02 47 6.82 0.0238
2018-04-27 2018-03-31 13F ARISTA NETWORKS COMMON STOCK 040413106 174 0 0.00 44 7.32 0.0227
2018-01-26 2017-12-31 13F ARISTA NETWORKS COMMON STOCK 040413106 174 0 0.00 41 24.24 0.0199
2017-10-27 2017-09-30 13F ARISTA NETWORKS COMMON STOCK 040413106 174 0 0.00 33 26.92 0.0163
2017-07-28 2017-06-30 13F ARISTA NETWORKS COMMON STOCK 040413106 174 174 26 0.0130
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.