Arista Networks, Inc.
MX ˙ BMV ˙ US0404132054
SecurityMX:ANET / Arista Networks, Inc.
InstitutionLord, Abbett & Co. Llc
Latest Disclosed Ownership1,150,236 shares
Latest Disclosed Value $ 141,226
Lord, Abbett & Co. Llc reports 41.95% decrease in ownership of ANET / Arista Networks, Inc.

On May 14, 2026 - Lord, Abbett & Co. Llc filed a 13F-HR form disclosing ownership of 1,150,236 shares of Arista Networks, Inc. (MX:ANET) valued at $141,226 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 1,981,392 shares of Arista Networks, Inc.. This represents a change in shares of -41.95% 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)
2026-05-14 2026-03-31 13F ARISTA NETWORKS COM 040413205 1,150,236 -831,156 -41.95 141 -45.56 0.4611
2026-02-13 2025-12-31 13F ARISTA NETWORKS COM 040413205 1,981,392 -239,166 -10.77 260 -19.81 0.7964
2025-11-13 2025-09-30 13F ARISTA NETWORKS COM 040413205 2,220,558 600,453 37.06 324 95.76 0.9633
2025-08-14 2025-06-30 13F ARISTA NETWORKS COM 040413205 1,620,105 567,002 53.84 166 103.70 0.5333
2025-05-13 2025-03-31 13F ARISTA NETWORKS COM 040413205 1,053,103 -973,915 -48.05 82 -63.84 0.2907
2025-02-14 2024-12-31 13F ARISTA NETWORKS INC COM SHS COM 040413205 2,027,018 1,513,977 295.10 224 14.29 0.7085
2024-12-13 2024-09-30 13F/A-1 Arista Networks COM 040413106 513,041 -124,627 -19.54 197 -12.11 0.6267
2024-11-14 2024-09-30 13F Arista Networks COM 040413106 513,041 -124,627 197 0.6348
2024-10-07 2024-06-30 13F/A-1 Arista Networks COM 040413106 637,668 -89,821 -12.35 223 6.19 0.7311
2024-08-14 2024-06-30 13F Arista Networks COM 040413106 637,668 -89,821 223 0.7465
2024-10-07 2024-03-31 13F/A-1 Arista Networks COM 040413106 727,489 -292,813 -28.70 211 -12.50 0.6810
2024-05-09 2024-03-31 13F Arista Networks COM 040413106 727,489 -292,813 211 0.6933
2024-10-07 2023-12-31 13F/A-1 Arista Networks COM 040413106 1,020,302 -35,649 -3.38 240 23.71 0.8432
2024-02-12 2023-12-31 13F Arista Networks COM 040413106 1,020,302 -35,649 240 0.8629
2024-10-07 2023-09-30 13F/A-1 Arista Networks COM 040413106 1,055,951 328,981 45.25 194 65.81 0.7221
2023-11-13 2023-09-30 13F Arista Networks COM 040413106 1,055,951 328,981 194 0.7278
2024-10-07 2023-06-30 13F/A-1 Arista Networks COM 040413106 726,970 -265,230 -26.73 118 -29.52 0.4056
2023-08-14 2023-06-30 13F Arista Networks COM 040413106 726,970 -265,230 118 0.4056
2024-10-07 2023-03-31 13F/A-1 Arista Networks COM 040413106 992,200 14,741 1.51 167 40.68 0.6005
2023-05-12 2023-03-31 13F Arista Networks COM 040413106 992,200 14,741 167 0.6014
2024-10-07 2022-12-31 13F/A-1 Arista Networks COM 040413106 977,459 -133,970 -12.05 119 -99.91 0.4239
2023-02-10 2022-12-31 13F Arista Networks COM 040413106 977,459 -133,970 119 0.4248
2022-11-14 2022-09-30 13F ARISTA NETWORKS INC COM COM 040413106 1,111,429 17,754 1.62 125,469 22.38 0.4583
2022-08-12 2022-06-30 13F ARISTA NETWORKS INC COM COM 040413106 1,093,675 -274,106 -20.04 102,521 -46.07 0.3625
2022-05-13 2022-03-31 13F ARISTA NETWORKS INC COM COM 040413106 1,367,781 -738,884 -35.07 190,094 -37.23 0.5068
2022-02-11 2021-12-31 13F ARISTA NETWORKS INC COM COM 040413106 2,106,665 1,916,405 1,007.26 302,833 363.18 0.6900
2021-11-09 2021-09-30 13F ARISTA NETWORKS INC COM COM 040413106 190,260 644 0.34 65,381 -4.83 0.1564
2021-08-11 2021-06-30 13F ARISTA NETWORKS INC COM COM 040413106 189,616 189,616 68,699 0.1656
2019-08-14 2019-06-30 13F ARISTA NETWORKS INC COM COM 040413106 0 -201,349 -100.00 0 -100.00
2019-05-15 2019-03-31 13F ARISTA NETWORKS INC COM COM 040413106 201,349 201,349 63,316 0.2109
2019-02-14 2018-12-31 13F ARISTA NETWORKS INC COM COM 040413106 0 -93,109 -100.00 0 -100.00
2018-11-14 2018-09-30 13F ARISTA NETWORKS INC COM COM 040413106 93,109 -3,504 -3.63 24,754 -0.49 0.0686
2018-08-14 2018-06-30 13F ARISTA NETWORKS INC COM COM 040413106 96,613 -98,538 -50.49 24,877 -50.07 0.0727
2018-05-15 2018-03-31 13F ARISTA NETWORKS INC COM COM 040413106 195,151 76,622 64.64 49,822 78.43 0.1480
2018-02-14 2017-12-31 13F ARISTA NETWORKS INC COM COM 040413106 118,529 -178,748 -60.13 27,923 -50.46 0.0794
2017-11-14 2017-09-30 13F ARISTA NETWORKS INC COM COM 040413106 297,277 1,990 0.67 56,367 27.44 0.1646
2017-08-24 2017-06-30 13F/A-1 ARISTA NETWORKS INC COM COM 040413106 295,287 -142,225 -32.51 44,231 -23.57 0.1314
2017-08-14 2017-06-30 13F ARISTA NETWORKS INC COM COM 040413106 295,287 -142,225 44,231
2017-05-15 2017-03-31 13F ARISTA NETWORKS INC COM COM 040413106 437,512 238,884 120.27 57,870 201.08 0.1732
2017-02-14 2016-12-31 13F ARISTA NETWORKS INC COM COM 040413106 198,628 -3,710 -1.83 19,221 11.65 0.0584
2016-11-10 2016-09-30 13F ARISTA NETWORKS INC COM COM 040413106 202,338 96,240 90.71 17,215 152.01 0.0525
2016-08-12 2016-06-30 13F ARISTA NETWORKS INC COM COM 040413106 106,098 -88,973 -45.61 6,831 -44.50 0.0214
2016-05-16 2016-03-31 13F ARISTA NETWORKS INC COM COM 040413106 195,071 -492,398 -71.62 12,309 -77.00 0.0387
2016-02-16 2015-12-31 13F ARISTA NETWORKS INC COM COM 040413106 687,469 344,954 100.71 53,513 155.33 0.1609
2015-11-16 2015-09-30 13F ARISTA NETWORKS INC COM COM 040413106 342,515 -260,648 -43.21 20,958 -57.49 0.0632
2015-08-14 2015-06-30 13F ARISTA NETWORKS INC COM COM 040413106 603,163 515,008 584.21 49,303 692.91 0.1300
2015-05-15 2015-03-31 13F ARISTA NETWORKS INC COM COM 040413106 88,155 88,155 -85.38 6,218 -87.39 0.0157
2015-02-13 2014-12-31 13F Arista Networks COM 040413106 0 -595,427 -100.00 0 -100.00
2014-11-14 2014-09-30 13F Arista Networks COM 040413106 595,427 555,759 1,401.03 52,594 2,025.01 0.1319
2014-08-20 2014-06-30 13F/A-1 ARISTA NETWORKS INC COM COM 040413106 39,668 39,668 2,475 0.0056
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.