Arista Networks, Inc.
MX ˙ BMV ˙ US0404132054
SecurityMX:ANET / Arista Networks, Inc.
InstitutionAmeriprise Financial Inc
Latest Disclosed Ownership10,028,607 shares
Latest Disclosed Value $ 1,227,139,621
Ameriprise Financial Inc ownership in ANET / Arista Networks, Inc.

On May 15, 2026 - Ameriprise Financial Inc filed a 13F-HR form disclosing ownership of 10,028,607 shares of Arista Networks, Inc. (MX:ANET) valued at $1,227,139,621 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 9,819,361 shares of Arista Networks, Inc.. This represents a change in shares of 2.13% during the quarter.

Ameriprise Financial Inc has a history of taking positions in derivatives of the underlying security (ANET) in the form of stock options. The firm currently holds call options representing 0 of underlying shares valued at $0 USD and put options representing 0 of underlying shares valued at $0 USD .

Note: prior versions of this page mistakenly stated that the share values represented the number of options, not the number of underlying shares. For more information on the data backing these reports, please see the SEC document Frequently Asked Questions About Form 13F.

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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Institutional Put/Call Ratios
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In addition to reporting standard equity and debt issues, institutions with more than 100MM assets under management must also disclose their put and call option holdings. Since put options generally indicate negative sentiment, and call options indicate positive sentiment, we can get a sense of the overall institutional sentiment by plotting the ratio of puts to calls. The chart to the right plots the historical put/call ratio for this instrument.

Using Put/Call Ratio as an indicator of investor sentiment overcomes one of the key deficiencies of using total institutional ownership, which is that a significant amount of assets under management are invested passively to track indices. Passively-managed funds do not typically buy options, so the put/call ratio indicator more closely tracks the sentiment of actively-managed funds.

MX:ANET / Arista Networks, Inc. Historical Put/Call Ratio
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 040413205 10,028,607 209,246 2.13 1,227,140 -4.62 0.0526
2026-02-17 2025-12-31 13F ARISTA NETWORKS COM 040413205 9,819,361 1,752,923 21.73 1,286,628 9.47 0.2908
2025-11-14 2025-09-30 13F ARISTA NETWORKS COM 040413205 8,066,438 -1,031,670 -11.34 1,175,356 26.28 0.2700
2025-08-14 2025-06-30 13F ARISTA NETWORKS COM 040413205 9,098,108 1,753,448 23.87 930,735 63.56 0.2294
2025-05-14 2025-03-31 13F ARISTA NETWORKS COM 040413205 7,344,660 -531,099 -6.74 569,064 -34.63 0.1536
2025-02-14 2024-12-31 13F ARISTA NETWORKS COM 040413205 7,875,759 5,847,953 288.39 870,513 11.85 0.2234
2024-11-14 2024-09-30 13F ARISTA NETWORKS COM 040413106 2,027,806 233,220 13.00 778,295 23.74 0.1996
2024-08-14 2024-06-30 13F ARISTA NETWORKS COM 040413106 1,794,586 884,703 97.23 628,966 139.13 0.1702
2024-05-15 2024-03-31 13F ARISTA NETWORKS COM 040413106 909,883 -299,038 -24.74 263,026 -7.62 0.0724
2024-02-14 2023-12-31 13F ARISTA NETWORKS COM 040413106 1,208,921 -276,689 -18.62 284,715 4.20 0.0852
2023-11-14 2023-09-30 13F ARISTA NETWORKS COM 040413106 1,485,610 -243,888 -14.10 273,243 -2.51 0.0897
2023-08-14 2023-06-30 13F ARISTA NETWORKS COM 040413106 1,729,498 53,684 3.20 280,282 -0.36 0.0879
2023-05-22 2023-03-31 13F/A-1 ARISTA NETWORKS COM 040413106 1,675,814 591,174 54.50 281,303 113.72 0.0922
2023-05-15 2023-03-31 13F ARISTA NETWORKS COM 040413106 1,675,814 591,174 281,303 0.0170
2023-02-14 2022-12-31 13F ARISTA NETWORKS COM 040413106 1,084,640 -115,353 -9.61 131,620 -2.90 0.0451
2022-11-14 2022-09-30 13F ARISTA NETWORKS COM 040413106 1,199,993 -2,606 -0.22 135,551 20.35 0.0501
2022-08-15 2022-06-30 13F ARISTA NETWORKS COM 040413106 1,202,599 1,657 0.14 112,634 -32.63 0.0393
2022-05-16 2022-03-31 13F ARISTA NETWORKS COM 040413106 1,200,942 -67,963 -5.36 167,190 -7.76 0.0493
2022-02-14 2021-12-31 13F ARISTA NETWORKS COM 040413106 1,268,905 854,497 206.20 181,265 27.29 0.0501
2021-11-15 2021-09-30 13F ARISTA NETWORKS COM 040413106 414,408 -70,643 -14.56 142,407 -18.97 0.0455
2021-08-16 2021-06-30 13F ARISTA NETWORKS COM 040413106 485,051 -32,089 -6.21 175,739 12.19 0.0543
2021-05-17 2021-03-31 13F ARISTA NETWORKS COM 040413106 517,140 -147,070 -22.14 156,642 -18.84 0.0521
2021-02-12 2020-12-31 13F ARISTA NETWORKS COM 040413106 664,210 204,461 44.47 193,001 102.89 0.0685
2020-11-16 2020-09-30 13F ARISTA NETWORKS COM 040413106 459,749 345,415 302.11 95,124 296.15 0.0387
2020-08-14 2020-06-30 13F ARISTA NETWORKS COM 040413106 114,334 -245,296 -68.21 24,012 -67.05 0.0103
2020-05-15 2020-03-31 13F ARISTA NETWORKS COM 040413106 359,630 -10,604 -2.86 72,874 -3.23 0.0383
2020-02-14 2019-12-31 13F ARISTA NETWORKS COM 040413106 370,234 -356,879 -49.08 75,303 -56.65 0.0313
2019-11-14 2019-09-30 13F ARISTA NETWORKS COM 040413106 727,113 169,284 30.35 173,721 19.92 0.0778
2019-08-14 2019-06-30 13F ARISTA NETWORKS COM 040413106 557,829 112,286 25.20 144,859 3.37 0.0649
2019-05-15 2019-03-31 13F ARISTA NETWORKS COM 040413106 445,543 147,527 49.50 140,133 123.22 0.0645
2019-02-14 2018-12-31 13F ARISTA NETWORKS COM 040413106 298,016 65,548 28.20 62,779 1.58 0.0314
2018-11-14 2018-09-30 13F ARISTA NETWORKS COM 040413106 232,468 160,280 222.03 61,804 232.67 0.0216
2018-08-14 2018-06-30 13F ARISTA NETWORKS COM 040413106 72,188 -820 -1.12 18,578 -0.24 0.0082
2018-05-14 2018-03-31 13F ARISTA NETWORKS COM 040413106 73,008 -186,984 -71.92 18,623 -69.76 0.0084
2018-02-12 2017-12-31 13F ARISTA NETWORKS COM 040413106 259,992 -389,483 -59.97 61,576 -49.99 0.0281
2017-11-07 2017-09-30 13F ARISTA NETWORKS COM 040413106 649,475 18,465 2.93 123,136 30.28 0.0586
2017-08-10 2017-06-30 13F ARISTA NETWORKS COM 040413106 631,010 -128,681 -16.94 94,516 -5.94 0.0473
2017-05-05 2017-03-31 13F ARISTA NETWORKS COM 040413106 759,691 -93,842 -10.99 100,484 21.66 0.0520
2017-02-03 2016-12-31 13F ARISTA NETWORKS COM 040413106 853,533 -591,764 -40.94 82,596 -32.83 0.0451
2016-11-08 2016-09-30 13F ARISTA NETWORKS COM 040413106 1,445,297 117,492 8.85 122,966 43.85 0.0689
2016-08-08 2016-06-30 13F ARISTA NETWORKS COM 040413106 1,327,805 50,686 3.97 85,483 6.08 0.0501
2016-05-12 2016-03-31 13F ARISTA NETWORKS COM 040413106 1,277,119 73,047 6.07 80,587 -14.02 0.0481
2016-02-11 2015-12-31 13F ARISTA NETWORKS COM 040413106 1,204,072 227,405 23.28 93,724 56.82 0.0550
2015-11-12 2015-09-30 13F ARISTA NETWORKS COM 040413106 976,667 24,715 2.60 59,764 -23.20 0.0370
2015-08-13 2015-06-30 13F ARISTA NETWORKS COM 040413106 951,952 375,462 65.13 77,815 91.37 0.0443
2015-05-14 2015-03-31 13F ARISTA NETWORKS COM 040413106 576,490 559,690 3,331.49 40,662 3,886.47 0.0233
2015-02-13 2014-12-31 13F ARISTA NETWORKS COM 040413106 16,800 15,400 1,100.00 1,020 722.58 0.0006
2014-11-14 2014-09-30 13F ARISTA NETWORKS COM 040413106 1,400 -484 -25.69 124 5.08 0.0001
2014-08-13 2014-06-30 13F ARISTA NETWORKS COM 040413106 1,884 1,884 118 0.0001
Disclosed Call Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share
Price
Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2026-02-17 2025-12-31 13F ARISTA NETWORKS OPT Call 0 -100.00 0 -100.00 n/a n/a n/a
2025-11-14 2025-09-30 13F ARISTA NETWORKS OPT Call 64,300 -58.52 9,369 -40.92 n/a n/a n/a
2025-08-14 2025-06-30 13F ARISTA NETWORKS OPT Call 155,000 75.54 15,858 131.81 n/a n/a n/a
2025-05-14 2025-03-31 13F ARISTA NETWORKS OPT Call 88,300 6,841 n/a n/a n/a
Disclosed Put Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share Price Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2025-02-14 2024-12-31 13F ARISTA NETWORKS OPT Put 0 -100.00 0 -100.00 n/a n/a n/a
2024-11-14 2024-09-30 13F ARISTA NETWORKS OPT Put 3,700 1,420 n/a n/a n/a
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.