Arista Networks, Inc.
MX ˙ BMV ˙ US0404132054
SecurityMX:ANET / Arista Networks, Inc.
InstitutionJanney Montgomery Scott LLC
Latest Disclosed Ownership420,589 shares
Latest Disclosed Value $ 51,640
Janney Montgomery Scott LLC reports 9.08% increase in ownership of ANET / Arista Networks, Inc.

On April 22, 2026 - Janney Montgomery Scott LLC filed a 13F-HR form disclosing ownership of 420,589 shares of Arista Networks, Inc. (MX:ANET) valued at $51,640 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 11, 2026 disclosing 385,585 shares of Arista Networks, Inc.. This represents a change in shares of 9.08% 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)
2026-04-22 2026-03-31 13F ARISTA NETWORKS Common Stock 040413205 420,589 35,004 9.08 52 2.00 0.1278
2026-02-11 2025-12-31 13F ARISTA NETWORKS Common Stock 040413205 385,585 105,998 37.91 51 25.00 0.1159
2025-10-27 2025-09-30 13F ARISTA NETWORKS Common Stock 040413205 279,587 -30,579 -9.86 41 29.03 0.0966
2025-07-17 2025-06-30 13F ARISTA NETWORKS Common Stock 040413205 310,166 179,286 136.99 32 210.00 0.0829
2025-04-17 2025-03-31 13F ARISTA NETWORKS Common Stock 040413205 130,880 -9,486 -6.76 10 -33.33 0.0287
2025-01-17 2024-12-31 13F ARISTA NETWORKS Common Stock 040413205 140,366 94,276 204.55 16 -11.76 0.0430
2024-10-29 2024-09-30 13F ARISTA NETWORKS Common Stock 040413106 46,090 3,706 8.74 18 21.43 0.0494
2024-07-25 2024-06-30 13F ARISTA NETWORKS Common Stock 040413106 42,384 295 0.70 15 16.67 0.0453
2024-05-01 2024-03-31 13F ARISTA NETWORKS Common Stock 040413106 42,089 8,656 25.89 12 71.43 0.0363
2024-02-08 2023-12-31 13F ARISTA NETWORKS Common Stock 040413106 33,433 4,068 13.85 8 40.00 0.0255
2023-11-08 2023-09-30 13F ARISTA NETWORKS Common Stock 040413106 29,365 -5,322 -15.34 5 0.00 0.0201
2023-07-26 2023-06-30 13F ARISTA NETWORKS Common Stock 040413106 34,687 34,687 6 0.0196
2023-04-28 2023-03-31 13F ARISTA NETWORKS Common Stock 040413106 0 -97,441 -100.00 0 -100.00
2023-02-01 2022-12-31 13F ARISTA NETWORKS Common Stock 040413106 97,441 9,923 11.34 12 -99.89 0.0461
2022-10-25 2022-09-30 13F ARISTA NETWORKS Common Stock 040413106 87,518 87,518 9,880 0.0423
2021-04-27 2021-03-31 13F ARISTA NETWORKS Common Stock 040413106 0 -35,031 -100.00 0 -100.00
2021-01-25 2020-12-31 13F ARISTA NETWORKS Common Stock 040413106 35,031 3,167 9.94 10,179 54.37 0.0492
2020-11-06 2020-09-30 13F ARISTA NETWORKS Common Stock 040413106 31,864 9,312 41.29 6,594 39.20 0.0376
2020-07-23 2020-06-30 13F ARISTA NETWORKS Common Stock 040413106 22,552 2,739 13.82 4,737 18.04 0.0299
2020-04-30 2020-03-31 13F ARISTA NETWORKS Common Stock 040413106 19,813 6,902 53.46 4,013 52.82 0.0318
2020-01-21 2019-12-31 13F ARISTA NETWORKS Common Stock 040413106 12,911 -3,709 -22.32 2,626 -33.87 0.0172
2019-10-29 2019-09-30 13F ARISTA NETWORKS Common Stock 040413106 16,620 7,372 79.71 3,971 65.39 0.0289
2019-07-29 2019-06-30 13F ARISTA NETWORKS Common Stock 040413106 9,248 626 7.26 2,401 -11.43 0.0184
2019-04-30 2019-03-31 13F/A-1 ARISTA NETWORKS Common Stock 040413106 8,622 2,137 32.95 2,711 98.46 0.0223
2019-04-30 2019-03-31 13F ARISTA NETWORKS Common Stock 040413106 6,485 0 1,366
2019-02-01 2018-12-31 13F ARISTA NETWORKS Common Stock 040413106 6,485 942 16.99 1,366 -7.33 0.0132
2018-11-05 2018-09-30 13F ARISTA NETWORKS Common Stock 040413106 5,543 109 2.01 1,474 5.36 0.0127
2018-07-24 2018-06-30 13F ARISTA NETWORKS Common Stock 040413106 5,434 -3,820 -41.28 1,399 -40.80 0.0135
2018-04-19 2018-03-31 13F ARISTA NETWORKS Common Stock 040413106 9,254 1,609 21.05 2,363 31.20 0.0238
2018-02-14 2017-12-31 13F ARISTA NETWORKS Common Stock 040413106 7,645 2,312 43.35 1,801 78.14 0.0187
2017-11-15 2017-09-30 13F ARISTA NETWORKS Common Stock 040413106 5,333 -57 -1.06 1,011 25.28 0.0115
2017-07-27 2017-06-30 13F ARISTA NETWORKS Common Stock 040413106 5,390 -1,887 -25.93 807 -16.20 0.0101
2017-04-26 2017-03-31 13F ARISTA NETWORKS Common Stock 040413106 7,277 -288 -3.81 963 31.56 0.0128
2017-02-13 2016-12-31 13F ARISTA NETWORKS Common Stock 040413106 7,565 -100 -1.30 732 12.27 0.0110
2016-11-14 2016-09-30 13F ARISTA NETWORKS Common Stock 040413106 7,665 -965 -11.18 652 -2.98 0.0115
2016-08-05 2016-06-30 13F ARISTA NETWORKS Common Stock 040413106 8,630 340 4.10 672 28.49 0.0106
2016-05-10 2016-03-31 13F ARISTA NETWORKS Common Stock 040413106 8,290 -340 -3.94 523 -22.17 0.0137
2016-02-19 2015-12-31 13F ARISTA NETWORKS Common Stock 040413106 8,630 1,075 14.23 672 45.45 0.0174
2015-11-16 2015-09-30 13F ARISTA NETWORKS Common Stock 040413106 7,555 1,040 15.96 462 -13.16 0.0130
2015-08-04 2015-06-30 13F ARISTA NETWORKS Common Stock 040413106 6,515 6,515 533 0.0111
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.