Arista Networks, Inc.
MX ˙ BMV ˙ US0404132054
SecurityMX:ANET / Arista Networks, Inc.
InstitutionBoston Private Wealth Llc
Latest Disclosed Ownership10,417 shares
Latest Disclosed Value $ 1,279,061
Boston Private Wealth Llc reports 13.89% decrease in ownership of ANET / Arista Networks, Inc.

On April 17, 2026 - Boston Private Wealth Llc filed a 13F-HR form disclosing ownership of 10,417 shares of Arista Networks, Inc. (MX:ANET) valued at $1,279,061 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 4, 2026 disclosing 12,097 shares of Arista Networks, Inc.. This represents a change in shares of -13.89% 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)
2026-04-17 2026-03-31 13F Arista Networks COM 040413205 10,417 -1,680 -13.89 1,279 -19.31 0.0225
2026-02-04 2025-12-31 13F Arista Networks COM 040413205 12,097 -4,979 -29.16 1,585 -36.29 0.0935
2025-11-06 2025-09-30 13F Arista Networks COM 040413205 17,076 -7,602 -30.80 2,488 -1.43 0.1339
2025-08-14 2025-06-30 13F Arista Networks COM 040413205 24,678 -8,880 -26.46 2,525 -2.92 0.1353
2025-05-14 2025-03-31 13F Arista Networks COM 040413205 33,558 -1,421 -4.06 2,600 -32.75 0.1068
2025-02-05 2024-12-31 13F Arista Networks COM 040413205 34,979 34,979 3,866 0.0722
2024-10-18 2024-09-30 13F ARISTA NETWORKS INC COM USD0.0 COM 040413106 0 -9,955 -100.00 0 -100.00
2024-08-06 2024-06-30 13F ARISTA NETWORKS INC COM USD0.0 COM 040413106 9,955 -953 -8.74 3,489 10.31 0.0864
2024-05-15 2024-03-31 13F ARISTA NETWORKS INC COM USD0.0 COM 040413106 10,908 -382 -3.38 3,163 19.00 0.0705
2024-01-30 2023-12-31 13F ARISTA NETWORKS INC COM USD0.0 COM 040413106 11,290 -1,251 -9.98 2,659 15.26 0.0647
2023-10-23 2023-09-30 13F ARISTA NETWORKS INC COM USD0.0 COM 040413106 12,541 -307 -2.39 2,307 10.76 0.0507
2023-07-24 2023-06-30 13F ARISTA NETWORKS INC COM USD0.0 COM 040413106 12,848 -598 -4.45 2,082 -7.75 0.0376
2023-05-12 2023-03-31 13F ARISTA NETWORKS INC COM USD0.0 COM 040413106 13,446 -2,979 -18.14 2,257 13.25 0.0315
2023-02-10 2022-12-31 13F Arista Networks COM 040413106 16,425 -1,590 -8.83 1,993 -2.02 0.0269
2022-11-09 2022-09-30 13F Arista Networks COM 040413106 18,015 469 2.67 2,034 23.65 0.0297
2022-08-16 2022-06-30 13F Arista Networks COM 040413106 17,546 -4,299 -19.68 1,645 -45.82 0.0253
2022-05-13 2022-03-31 13F Arista Networks COM 040413106 21,845 -116,232 -84.18 3,036 -84.70 0.0407
2022-02-15 2021-12-31 13F Arista Networks COM 040413106 138,077 104,227 307.91 19,849 70.64 0.3255
2021-11-09 2021-09-30 13F Arista Networks COM 040413106 33,850 -98 -0.29 11,632 -5.43 0.1494
2021-08-13 2021-06-30 13F Arista Networks COM 040413106 33,948 1,216 3.72 12,300 24.47 0.1560
2021-05-11 2021-03-31 13F Arista Networks COM 040413106 32,732 -2,437 -6.93 9,882 -3.30 0.1376
2021-02-10 2020-12-31 13F Arista Networks COM 040413106 35,169 943 2.76 10,219 44.28 0.1500
2020-11-10 2020-09-30 13F Arista Networks COM 040413106 34,226 3,478 11.31 7,083 9.68 0.1168
2020-08-05 2020-06-30 13F Arista Networks COM 040413106 30,748 5,753 23.02 6,458 27.55 0.1200
2020-05-11 2020-03-31 13F Arista Networks COM 040413106 24,995 24,995 5,063 0.1229
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.