Arista Networks, Inc.
MX ˙ BMV ˙ US0404132054
SecurityMX:ANET / Arista Networks, Inc.
InstitutionState Street Corp
Latest Disclosed Ownership46,761,991 shares
Latest Disclosed Value $ 5,741,437,255
State Street Corp reports 0.44% decrease in ownership of ANET / Arista Networks, Inc.

On May 15, 2026 - State Street Corp filed a 13F-HR form disclosing ownership of 46,761,991 shares of Arista Networks, Inc. (MX:ANET) valued at $5,741,437,255 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 46,970,697 shares of Arista Networks, Inc.. This represents a change in shares of -0.44% 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)
2026-05-15 2026-03-31 13F ARISTA NETWORKS COM SHS 040413205 46,761,991 -208,706 -0.44 5,741,437 -6.71 0.1982
2026-02-13 2025-12-31 13F ARISTA NETWORKS COM SHS 040413205 46,970,697 628,146 1.36 6,154,570 -8.86 0.2065
2025-11-14 2025-09-30 13F ARISTA NETWORKS COM SHS 040413205 46,342,551 245,976 0.53 6,752,573 43.18 0.2342
2025-08-14 2025-06-30 13F ARISTA NETWORKS COM SHS 040413205 46,096,575 61,201 0.13 4,716,141 32.22 0.1768
2025-05-15 2025-03-31 13F ARISTA NETWORKS COM SHS 040413205 46,035,374 -183,093 -0.40 3,566,821 -30.19 0.1470
2025-02-14 2024-12-31 13F ARISTA NETWORKS COM SHS 040413205 46,218,467 34,980,832 311.28 5,108,963 18.45 0.2016
2024-11-14 2024-09-30 13F ARISTA NETWORKS COM 040413106 11,237,635 411,109 3.80 4,313,229 13.67 0.1755
2024-08-14 2024-06-30 13F ARISTA NETWORKS COM 040413106 10,826,526 78,021 0.73 3,794,481 21.74 0.1658
2024-05-15 2024-03-31 13F ARISTA NETWORKS COM 040413106 10,748,505 169,207 1.60 3,116,851 25.10 0.1393
2024-02-14 2023-12-31 13F ARISTA NETWORKS COM 040413106 10,579,298 416,647 4.10 2,491,530 33.29 0.1212
2023-11-14 2023-09-30 13F ARISTA NETWORKS COM 040413106 10,162,651 -118,336 -1.15 1,869,216 12.19 0.1036
2023-08-14 2023-06-30 13F ARISTA NETWORKS COM 040413106 10,280,987 289,064 2.89 1,666,137 -0.66 0.0875
2023-05-15 2023-03-31 13F ARISTA NETWORKS COM 040413106 9,991,923 313,036 3.23 1,677,231 42.80 0.0946
2023-05-15 2022-12-31 13F/A-99 ARISTA NETWORKS COM 040413106 9,678,887 316,037 3.38 1,174,533 11.12 0.0690
2023-05-15 2022-12-31 13F ARISTA NETWORKS COM 040413106 9,678,887 316,037 1,174,533 0.0690
2022-11-15 2022-09-30 13F ARISTA NETWORKS COM 040413106 9,362,850 700,606 8.09 1,056,972 30.17 0.0669
2022-08-15 2022-06-30 13F ARISTA NETWORKS COM 040413106 8,662,244 -92,889 -1.06 811,999 -33.27 0.0487
2022-05-16 2022-03-31 13F ARISTA NETWORKS COM 040413106 8,755,133 -138,377 -1.56 1,216,788 -4.82 0.0602
2022-02-14 2021-12-31 13F ARISTA NETWORKS COM 040413106 8,893,510 6,759,436 316.74 1,278,442 74.33 0.0606
2021-11-15 2021-09-30 13F ARISTA NETWORKS COM 040413106 2,134,074 20,866 0.99 733,353 -4.22 0.0388
2021-08-16 2021-06-30 13F ARISTA NETWORKS COM 040413106 2,113,208 23,814 1.14 765,636 21.38 0.0404
2021-07-09 2021-03-31 13F/A-1 ARISTA NETWORKS COM 040413106 2,089,394 -100,723 -4.60 630,767 -0.88 0.0362
2021-05-17 2021-03-31 13F ARISTA NETWORKS COM 040413106 2,089,394 -100,723 630,767 0.0362
2021-02-16 2020-12-31 13F ARISTA NETWORKS COM 040413106 2,190,117 -49,991 -2.23 636,382 37.29 0.0390
2020-11-10 2020-09-30 13F ARISTA NETWORKS COM 040413106 2,240,108 -29,415 -1.30 463,546 -2.75 0.0316
2020-08-14 2020-06-30 13F ARISTA NETWORKS COM 040413106 2,269,523 28,083 1.25 476,668 4.99 0.0347
2020-06-19 2020-03-31 13F/A-1 ARISTA NETWORKS COM 040413106 2,241,440 71,892 3.31 454,004 2.88 0.0397
2020-05-11 2020-03-31 13F ARISTA NETWORKS COM 040413106 2,241,440 71,892 454,004 39,870.6927
2020-02-06 2019-12-31 13F ARISTA NETWORKS COM 040413106 2,169,548 46,261 2.18 441,286 -13.01 0.0302
2019-11-14 2019-09-30 13F ARISTA NETWORKS COM 040413106 2,123,287 48,455 2.34 507,296 -5.82 0.0378
2019-08-14 2019-06-30 13F ARISTA NETWORKS COM 040413106 2,074,832 17,907 0.87 538,668 -16.72 0.0402
2019-05-15 2019-03-31 13F ARISTA NETWORKS COM 040413106 2,056,925 98,213 5.01 646,821 56.73 0.0505
2019-02-12 2018-12-31 13F ARISTA NETWORKS COM 040413106 1,958,712 3,058 0.16 412,701 -20.62 0.0376
2018-11-09 2018-09-30 13F ARISTA NETWORKS Common equity shares 040413106 1,955,654 987,131 101.92 519,928 108.50 0.0399
2018-08-14 2018-06-30 13F ARISTA NETWORKS Common equity shares 040413106 968,523 27,252 2.90 249,365 3.77 0.0208
2018-05-15 2018-03-31 13F ARISTA NETWORKS Common equity shares 040413106 941,271 -5,401 -0.57 240,313 7.75 0.0204
2018-02-14 2017-12-31 13F ARISTA NETWORKS Common equity shares 040413106 946,672 -160,793 -14.52 223,024 6.20 0.0179
2017-11-14 2017-09-30 13F ARISTA NETWORKS Common equity shares 040413106 1,107,465 44,171 4.15 210,000 31.84 0.0181
2017-08-14 2017-06-30 13F ARISTA NETWORKS Common equity shares 040413106 1,063,294 328,534 44.71 159,278 63.89 0.0141
2017-05-15 2017-03-31 13F ARISTA NETWORKS Common equity shares 040413106 734,760 66,718 9.99 97,186 50.34 0.0087
2017-02-09 2016-12-31 13F ARISTA NETWORKS Common equity shares 040413106 668,042 -12,761 -1.87 64,645 11.59 0.0061
2017-01-13 2016-09-30 13F/A-1 ARISTA NETWORKS Common equity shares 040413106 680,803 40,144 6.27 57,930 40.45 0.0058
2016-11-14 2016-09-30 13F ARISTA NETWORKS Common equity shares 040413106 680,803 57,930
2016-08-12 2016-06-30 13F ARISTA NETWORKS Common equity shares 040413106 640,659 4,691 0.74 41,246 2.78 0.0044
2016-05-20 2016-03-31 13F/A-1 ARISTA NETWORKS Common equity shares 040413106 635,968 32,964 5.47 40,130 -14.50 0.0043
2016-05-12 2016-03-31 13F ARISTA NETWORKS Common equity shares 040413106 635,968 40,130
2016-02-16 2015-12-31 13F ARISTA NETWORKS Common equity shares 040413106 603,004 196,454 48.32 46,937 88.71 0.0051
2015-11-16 2015-09-30 13F ARISTA NETWORKS Common equity shares 040413106 406,550 82,190 25.34 24,872 -6.20 0.0029
2015-08-13 2015-06-30 13F ARISTA NETWORKS Common equity shares 040413106 324,360 265,965 455.46 26,515 544.35 0.0028
2015-05-15 2015-03-31 13F ARISTA NETWORKS Common equity shares 040413106 58,395 6,326 12.15 4,115 30.22 0.0004
2015-02-11 2014-12-31 13F ARISTA NETWORKS Common equity shares 040413106 52,069 31,256 150.18 3,160 72.02 0.0003
2014-11-12 2014-09-30 13F/A-1 ARISTA NETWORKS Common equity shares 040413106 20,813 20,813 1,837 0.0002
2014-11-10 2014-09-30 13F ARISTA NETWORKS Common equity shares 040413106 20,813 1,837 0.0002
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.