Arista Networks, Inc.
MX ˙ BMV ˙ US0404132054
SecurityMX:ANET / Arista Networks, Inc.
InstitutionMontecito Bank & Trust
Latest Disclosed Ownership6,820 shares
Latest Disclosed Value $ 837,360
Montecito Bank & Trust reports 11.89% decrease in ownership of ANET / Arista Networks, Inc.

On April 16, 2026 - Montecito Bank & Trust filed a 13F-HR form disclosing ownership of 6,820 shares of Arista Networks, Inc. (MX:ANET) valued at $837,360 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 9, 2026 disclosing 7,740 shares of Arista Networks, Inc.. This represents a change in shares of -11.89% 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)
2026-04-16 2026-03-31 13F ARISTA NETWORKS Equities 040413205 6,820 -920 -11.89 837 -17.46 0.1379
2026-01-09 2025-12-31 13F ARISTA NETWORKS Equities 040413205 7,740 -3,896 -33.48 1,014 -40.18 0.1617
2025-10-07 2025-09-30 13F ARISTA NETWORKS Equities 040413205 11,636 5,466 88.59 1,695 254.60 0.2633
2025-04-17 2025-03-31 13F ARISTA NETWORKS Equities 040413205 6,170 -1,161 -15.84 478 -40.99 0.0846
2025-01-21 2024-12-31 13F ARISTA NETWORKS Equities 040413205 7,331 5,697 348.65 810 29.19 0.1403
2024-10-31 2024-09-30 13F ARISTA NETWORKS Equities 040413106 1,634 264 19.27 627 30.63 0.1068
2024-07-17 2024-06-30 13F ARISTA NETWORKS INC COM Com 040413106 1,370 -190 -12.18 480 6.19 0.0977
2024-04-09 2024-03-31 13F ARISTA NETWORKS INC COM Com 040413106 1,560 -225 -12.61 452 7.62 0.0905
2024-01-05 2023-12-31 13F ARISTA NETWORKS INC COM Com 040413106 1,785 515 40.55 420 80.26 0.0904
2023-10-16 2023-09-30 13F ARISTA NETWORKS INC COM Com 040413106 1,270 1,270 234 0.0547
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.