Arista Networks, Inc.
MX ˙ BMV ˙ US0404132054
SecurityMX:ANET / Arista Networks, Inc.
InstitutionProShare Advisors LLC
Latest Disclosed Ownership199,876 shares
Latest Disclosed Value $ 24,540,774
ProShare Advisors LLC reports 18.43% decrease in ownership of ANET / Arista Networks, Inc.

On April 24, 2026 - ProShare Advisors LLC filed a 13F-HR form disclosing ownership of 199,876 shares of Arista Networks, Inc. (MX:ANET) valued at $24,540,774 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 6, 2026 disclosing 245,026 shares of Arista Networks, Inc.. This represents a change in shares of -18.43% 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)
2026-04-24 2026-03-31 13F ARISTA NETWORKS COM SHS 040413205 199,876 -45,150 -18.43 24,541 -23.56 0.0363
2026-02-06 2025-12-31 13F ARISTA NETWORKS COM SHS 040413205 245,026 13,171 5.68 32,106 -4.97 0.0567
2025-11-06 2025-09-30 13F ARISTA NETWORKS COM SHS 040413205 231,855 -4,342 -1.84 33,784 39.80 0.0707
2025-08-07 2025-06-30 13F ARISTA NETWORKS COM SHS 040413205 236,197 22,260 10.40 24,165 45.79 0.0482
2025-05-08 2025-03-31 13F ARISTA NETWORKS COM SHS 040413205 213,937 -6,595 -2.99 16,576 -32.00 0.0374
2025-02-14 2024-12-31 13F ARISTA NETWORKS COM SHS 040413205 220,532 170,239 338.49 24,375 26.28 0.0557
2024-11-14 2024-09-30 13F ARISTA NETWORKS COM 040413106 50,293 -481 -0.95 19,303 8.47 0.0473
2024-08-13 2024-06-30 13F ARISTA NETWORKS COM 040413106 50,774 3,027 6.34 17,795 28.53 0.0476
2024-05-08 2024-03-31 13F ARISTA NETWORKS COM 040413106 47,747 -1,460 -2.97 13,846 19.48 0.0368
2024-02-14 2023-12-31 13F ARISTA NETWORKS COM 040413106 49,207 -3,888 -7.32 11,589 18.67 0.0354
2023-11-13 2023-09-30 13F ARISTA NETWORKS COM 040413106 53,095 -4,503 -7.82 9,766 4.62 0.0304
2023-08-10 2023-06-30 13F ARISTA NETWORKS COM 040413106 57,598 -3,530 -5.77 9,334 -9.03 0.0271
2023-05-26 2023-03-31 13F/A-1 ARISTA NETWORKS COM 040413106 61,128 8,087 15.25 10,261 59.42 0.0314
2023-05-12 2023-03-31 13F ARISTA NETWORKS COM 040413106 61,128 8,087 10,261 0.0326
2023-02-02 2022-12-31 13F ARISTA NETWORKS COM 040413106 53,041 -1,737 -3.17 6,437 4.06 0.0226
2022-11-07 2022-09-30 13F ARISTA NETWORKS COM 040413106 54,778 4,773 9.55 6,185 31.93 0.0237
2022-08-01 2022-06-30 13F ARISTA NETWORKS COM 040413106 50,005 -15,637 -23.82 4,688 -48.62 0.0155
2022-05-10 2022-03-31 13F ARISTA NETWORKS COM 040413106 65,642 -6,119 -8.53 9,124 -11.55 0.0196
2022-02-08 2021-12-31 13F ARISTA NETWORKS COM 040413106 71,761 57,703 410.46 10,316 113.54 0.0202
2021-11-12 2021-09-30 13F ARISTA NETWORKS COM 040413106 14,058 3,320 30.92 4,831 24.19 0.0136
2021-08-13 2021-06-30 13F ARISTA NETWORKS COM 040413106 10,738 669 6.64 3,890 27.96 0.0114
2021-05-14 2021-03-31 13F ARISTA NETWORKS COM 040413106 10,069 849 9.21 3,040 13.48 0.0096
2021-02-09 2020-12-31 13F ARISTA NETWORKS COM 040413106 9,220 -4,523 -32.91 2,679 -5.80 0.0100
2020-11-13 2020-09-30 13F ARISTA NETWORKS COM 040413106 13,743 84 0.61 2,844 -0.87 0.0131
2020-08-03 2020-06-30 13F ARISTA NETWORKS COM 040413106 13,659 -1,649 -10.77 2,869 -7.48 0.0153
2020-05-15 2020-03-31 13F ARISTA NETWORKS COM 040413106 15,308 -6,039 -28.29 3,101 -28.58 0.0223
2020-02-12 2019-12-31 13F ARISTA NETWORKS COM 040413106 21,347 12,341 137.03 4,342 101.77 0.0201
2019-11-12 2019-09-30 13F ARISTA NETWORKS COM 040413106 9,006 697 8.39 2,152 -0.23 0.0120
2019-08-13 2019-06-30 13F ARISTA NETWORKS COM 040413106 8,309 -231 -2.70 2,157 -19.66 0.0129
2019-05-15 2019-03-31 13F ARISTA NETWORKS COM 040413106 8,540 -1,235 -12.63 2,685 30.34 0.0161
2019-02-14 2018-12-31 13F ARISTA NETWORKS COM 040413106 9,775 1,112 12.84 2,060 -10.55 0.0144
2018-11-14 2018-09-30 13F ARISTA NETWORKS COM 040413106 8,663 5,778 200.28 2,303 209.96 0.0156
2018-08-13 2018-06-30 13F ARISTA NETWORKS COM 040413106 2,885 414 16.75 743 17.75 0.0050
2018-05-14 2018-03-31 13F ARISTA NETWORKS COM 040413106 2,471 507 25.81 631 36.29 0.0041
2018-02-14 2017-12-31 13F ARISTA NETWORKS COM 040413106 1,964 406 26.06 463 56.95 0.0032
2017-11-13 2017-09-30 13F ARISTA NETWORKS COM 040413106 1,558 3 0.19 295 26.61 0.0027
2017-08-11 2017-06-30 13F ARISTA NETWORKS COM 040413106 1,555 1,555 233 0.0023
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.