Arista Networks, Inc.
MX ˙ BMV ˙ US0404132054
SecurityMX:ANET / Arista Networks, Inc.
InstitutionNorthwestern Mutual Wealth Management Co
Latest Disclosed Ownership541,241 shares
Latest Disclosed Value $ 66,453,603
Northwestern Mutual Wealth Management Co reports 6.20% decrease in ownership of ANET / Arista Networks, Inc.

On May 7, 2026 - Northwestern Mutual Wealth Management Co filed a 13F-HR form disclosing ownership of 541,241 shares of Arista Networks, Inc. (MX:ANET) valued at $66,453,603 USD as of March 31, 2026. The entity filed a previous 13F-HR/A on February 10, 2026 disclosing 576,991 shares of Arista Networks, Inc.. This represents a change in shares of -6.20% 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)
2026-05-07 2026-03-31 13F ARISTA NETWORKS COM SHS 040413205 541,241 -35,750 -6.20 66,454 -12.10 0.0409
2026-02-10 2025-12-31 13F/A-1 ARISTA NETWORKS COM SHS 040413205 576,991 76,800 15.35 75,603 3.73 0.0478
2026-02-05 2025-12-31 13F ARISTA NETWORKS COM SHS 040413205 182,603 -317,588 24,005 0.0152
2025-11-14 2025-09-30 13F ARISTA NETWORKS COM SHS 040413205 500,191 -153,990 -23.54 72,883 8.89 0.0486
2025-08-13 2025-06-30 13F ARISTA NETWORKS COM SHS 040413205 654,181 97,442 17.50 66,929 55.16 0.0488
2025-05-14 2025-03-31 13F ARISTA NETWORKS COM SHS 040413205 556,739 429,402 337.22 43,136 206.49 0.0353
2025-02-11 2024-12-31 13F ARISTA NETWORKS COM SHS 040413205 127,337 97,518 327.03 14,075 22.97 0.0119
2024-11-12 2024-09-30 13F ARISTA NETWORKS COM 040413106 29,819 3,452 13.09 11,445 23.85 0.0102
2024-08-16 2024-06-30 13F ARISTA NETWORKS COM 040413106 26,367 15,421 140.88 9,241 191.15 0.0091
2024-05-15 2024-03-31 13F ARISTA NETWORKS COM 040413106 10,946 -311 -2.76 3,174 19.73 0.0033
2024-02-13 2023-12-31 13F ARISTA NETWORKS COM 040413106 11,257 577 5.40 2,651 34.98 0.0030
2023-11-14 2023-09-30 13F ARISTA NETWORKS COM 040413106 10,680 -1,026 -8.76 1,964 3.59 0.0026
2023-08-14 2023-06-30 13F ARISTA NETWORKS COM 040413106 11,706 -1,756 -13.04 1,897 -16.07 0.0025
2023-05-15 2023-03-31 13F ARISTA NETWORKS COM 040413106 13,462 -634 -4.50 2,260 32.11 0.0032
2023-02-21 2022-12-31 13F ARISTA NETWORKS COM 040413106 14,096 -274 -1.91 1,711 5.43 0.0026
2022-11-14 2022-09-30 13F ARISTA NETWORKS COM 040413106 14,370 13 0.09 1,622 20.51 0.0028
2022-08-04 2022-06-30 13F ARISTA NETWORKS COM 040413106 14,357 736 5.40 1,346 -28.90 0.0023
2022-05-09 2022-03-31 13F ARISTA NETWORKS COM 040413106 13,621 -4,238 -23.73 1,893 -26.29 0.0030
2022-02-03 2021-12-31 13F ARISTA NETWORKS COM 040413106 17,859 14,482 428.84 2,568 121.19 0.0042
2021-11-15 2021-09-30 13F ARISTA NETWORKS COM 040413106 3,377 358 11.86 1,161 6.12 0.0021
2021-08-13 2021-06-30 13F ARISTA NETWORKS COM 040413106 3,019 128 4.43 1,094 25.46 0.0021
2021-05-14 2021-03-31 13F ARISTA NETWORKS COM 040413106 2,891 -40 -1.36 872 2.35 0.0019
2021-02-12 2020-12-31 13F ARISTA NETWORKS COM 040413106 2,931 -1,659 -36.14 852 -10.32 0.0020
2020-11-13 2020-09-30 13F ARISTA NETWORKS COM 040413106 4,590 -1,388 -23.22 950 -24.30 0.0026
2020-08-14 2020-06-30 13F ARISTA NETWORKS COM 040413106 5,978 -4,637 -43.68 1,255 -41.63 0.0039
2020-05-08 2020-03-31 13F ARISTA NETWORKS COM 040413106 10,615 2,685 33.86 2,150 33.29 0.0083
2020-02-13 2019-12-31 13F ARISTA NETWORKS COM 040413106 7,930 7,428 1,479.68 1,613 1,244.17 0.0055
2019-11-12 2019-09-30 13F ARISTA NETWORKS COM 040413106 502 138 37.91 120 26.32 0.0005
2019-08-12 2019-06-30 13F ARISTA NETWORKS COM 040413106 364 171 88.60 95 55.74 0.0004
2019-05-10 2019-03-31 13F ARISTA NETWORKS COM 040413106 193 61 46.21 61 117.86 0.0003
2019-02-12 2018-12-31 13F ARISTA NETWORKS COM 040413106 132 -285 -68.35 28 -74.77 0.0001
2018-11-01 2018-09-30 13F ARISTA NETWORKS COM 040413106 417 305 272.32 111 282.76 0.0006
2018-08-10 2018-06-30 13F ARISTA NETWORKS COM 040413106 112 8 7.69 29 7.41 0.0002
2018-05-14 2018-03-31 13F ARISTA NETWORKS COM 040413106 104 -249 -70.54 27 -67.47 0.0002
2018-01-31 2017-12-31 13F ARISTA NETWORKS COM 040413106 353 42 13.50 83 40.68 0.0005
2017-11-07 2017-09-30 13F ARISTA NETWORKS COM 040413106 311 0 0.00 59 25.53 0.0004
2017-08-10 2017-06-30 13F ARISTA NETWORKS COM 040413106 311 66 26.94 47 46.88 0.0004
2017-05-09 2017-03-31 13F ARISTA NETWORKS COM 040413106 245 -67 -21.47 32 6.67 0.0003
2017-02-15 2016-12-31 13F ARISTA NETWORKS COM 040413106 312 40 14.71 30 30.43 0.0003
2016-11-14 2016-09-30 13F ARISTA NETWORKS COM 040413106 272 272 0.00 23 0.0004
2016-08-29 2016-06-30 13F ARISTA NETWORKS COM 040413106 0 -36 -100.00 0 -100.00
2016-05-16 2016-03-31 13F ARISTA NETWORKS COM 040413106 36 36 3 0.0000
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.