Arista Networks, Inc.
MX ˙ BMV ˙ US0404132054
SecurityMX:ANET / Arista Networks, Inc.
InstitutionBaird Financial Group, Inc.
Latest Disclosed Ownership391,672 shares
Latest Disclosed Value $ 48,089,488
Baird Financial Group, Inc. reports 4.37% decrease in ownership of ANET / Arista Networks, Inc.

On May 14, 2026 - Baird Financial Group, Inc. filed a 13F-HR form disclosing ownership of 391,672 shares of Arista Networks, Inc. (MX:ANET) valued at $48,089,488 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 409,551 shares of Arista Networks, Inc.. This represents a change in shares of -4.37% 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.

Upgrade to unlock premium data and export to Excel .

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)
2026-05-14 2026-03-31 13F ARISTA NETWORKS COM SHS 040413205 391,672 -17,879 -4.37 48,089 -10.39 0.0751
2026-02-13 2025-12-31 13F ARISTA NETWORKS INC COM SHS COMMON 040413205 409,551 -20,449 -4.76 53,663 -14.35 0.0837
2025-11-13 2025-09-30 13F ARISTA NETWORKS COMMON 040413205 430,000 31,491 7.90 62,655 53.68 0.1008
2025-08-13 2025-06-30 13F ARISTA NETWORKS INC COM SHS COMMON 040413205 398,509 -47,443 -10.64 40,771 18.00 0.0715
2025-05-15 2025-03-31 13F ARISTA NETWORKS INC COM SHS COMMON 040413205 445,952 -188,930 -29.76 34,552 -50.76 0.0665
2025-02-14 2024-12-31 13F ARISTA NETWORKS COMMON 040413205 634,882 489,165 335.70 70,174 25.47 0.1342
2024-11-14 2024-09-30 13F ARISTA NETWORKS INC COM COMMON 040413106 145,717 2,508 1.75 55,929 11.43 0.1086
2024-08-14 2024-06-30 13F ARISTA NETWORKS INC COM COMMON 040413106 143,209 -2,201 -1.51 50,192 19.03 0.1041
2024-05-14 2024-03-31 13F ARISTA NETWORKS INC COM COMMON 040413106 145,410 4,953 3.53 42,166 27.47 0.0884
2024-02-14 2023-12-31 13F ARISTA NETWORKS INC COM COMMON 040413106 140,457 -1,729 -1.22 33,079 26.49 0.0754
2023-11-13 2023-09-30 13F ARISTA NETWORKS INC COM COMMON 040413106 142,186 38,927 37.70 26,152 56.28 0.0713
2023-08-11 2023-06-30 13F ARISTA NETWORKS INC COM COMMON 040413106 103,259 -437,165 -80.89 16,734 -81.55 0.0442
2023-05-15 2023-03-31 13F ARISTA NETWORKS INC COM COMMON 040413106 540,424 -153,159 -22.08 90,716 107,894.05 0.2238
2023-02-13 2022-12-31 13F ARISTA NETWORKS INC COM COMMON 040413106 693,583 -9,060 -1.29 84 -99.89 0.2216
2022-11-15 2022-09-30 13F ARISTA NETWORKS INC COM COMMON 040413106 702,643 30,063 4.47 79,321 25.81 0.2337
2022-08-08 2022-06-30 13F ARISTA NETWORKS INC COM COMMON 040413106 672,580 625 0.09 63,048 -32.49 0.1750
2022-05-13 2022-03-31 13F ARISTA NETWORKS INC COM COMMON 040413106 671,955 549,799 450.08 93,388 431.82 0.2308
2022-02-09 2021-12-31 13F ARISTA NETWORKS INC COM COMMON 040413106 122,156 91,296 295.84 17,560 65.60 0.0411
2021-11-12 2021-09-30 13F ARISTA NETWORKS INC COM COMMON 040413106 30,860 21,099 216.16 10,604 199.80 0.0271
2021-08-11 2021-06-30 13F ARISTA NETWORKS INC COM COMMON 040413106 9,761 2,454 33.58 3,537 60.34 0.0092
2021-05-13 2021-03-31 13F ARISTA NETWORKS COMMON 040413106 7,307 -975 -11.77 2,206 -8.35 0.0062
2021-02-11 2020-12-31 13F ARISTA NETWORKS COMMON 040413106 8,282 -86 -1.03 2,407 38.97 0.0072
2020-11-12 2020-09-30 13F ARISTA NETWORKS COMMON 040413106 8,368 -68 -0.81 1,732 -2.26 0.0059
2020-10-22 2020-06-30 13F/A-1 ARISTA NETWORKS INC COM COMMON 040413106 8,436 -68 -0.80 1,772 2.90 0.0067
2020-08-14 2020-06-30 13F ARISTA NETWORKS INC COM COMMON 040413106 210,797 202,293 42,876 84,970.4907
2020-05-14 2020-03-31 13F ARISTA NETWORKS COMMON 040413106 8,504 -203,315 -95.99 1,722 -96.00 0.0079
2020-02-14 2019-12-31 13F ARISTA NETWORKS INC COM COMMON 040413106 211,819 -9,596 -4.33 43,084 -18.56 0.1547
2019-11-14 2019-09-30 13F ARISTA NETWORKS Common 040413106 221,415 -519 -0.23 52,901 -8.19 0.2084
2019-08-14 2019-06-30 13F ARISTA NETWORKS COMMON 040413106 221,934 92,372 71.30 57,619 41.42 0.2240
2019-05-14 2019-03-31 13F ARISTA NETWORKS INC COM COMMON 040413106 129,562 120,367 1,309.05 40,742 2,003.36 0.2382
2019-02-14 2018-12-31 13F ARISTA NETWORKS COMMON 040413106 9,195 7,685 508.94 1,937 394.13 0.0131
2018-11-13 2018-09-30 13F ARISTA NETWORKS COMMON 040413106 1,510 159 11.77 392 12.64 0.0025
2018-08-13 2018-06-30 13F ARISTA NETWORKS COMMON 040413106 1,351 0 0.00 348 0.87 0.0024
2018-05-14 2018-03-31 13F ARISTA NETWORKS COMMON 040413106 1,351 -112 -7.66 345 0.00 0.0024
2018-02-09 2017-12-31 13F ARISTA NETWORKS COMMON 040413106 1,463 1,463 345 0.0024
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.