Arista Networks, Inc.
MX ˙ BMV ˙ US0404132054
SecurityMX:ANET / Arista Networks, Inc.
InstitutionBnp Paribas Arbitrage, Sa
Latest Disclosed Ownership2,077,819 shares
Latest Disclosed Value $ 255,114,616
Bnp Paribas Arbitrage, Sa ownership in ANET / Arista Networks, Inc.

On May 12, 2026 - Bnp Paribas Arbitrage, Sa filed a 13F-HR form disclosing ownership of 2,077,819 shares of Arista Networks, Inc. (MX:ANET) valued at $255,114,616 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 10, 2026 disclosing 1,837,715 shares of Arista Networks, Inc.. This represents a change in shares of 13.07% during the quarter.

Bnp Paribas Arbitrage, Sa 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)
2026-05-12 2026-03-31 13F Arista Networks Equity 040413205 2,077,819 240,104 13.07 255,115 5.95 0.0127
2026-02-10 2025-12-31 13F Arista Networks Equity 040413205 1,837,715 681,159 58.90 240,796 42.89 0.1091
2025-11-13 2025-09-30 13F Arista Networks Equity 040413205 1,156,556 -103,707 -8.23 168,522 30.70 0.0900
2025-08-14 2025-06-30 13F Arista Networks Equity 040413205 1,260,263 -1,681,735 -57.16 128,938 -43.44 0.0739
2025-05-14 2025-03-31 13F Arista Networks Equity 040413205 2,941,998 977,724 49.78 227,946 4.99 0.1341
2025-02-14 2024-12-31 13F Arista Networks Equity 040413205 1,964,274 1,323,053 206.33 217,111 -11.78 0.1217
2024-11-13 2024-09-30 13F Arista Networks Equity 040413106 641,221 64,594 11.20 246,113 21.78 0.1654
2024-08-13 2024-06-30 13F Arista Networks Equity 040413106 576,627 329,620 133.45 202,096 182.15 0.1647
2024-05-01 2024-03-31 13F Arista Networks Equity 040413106 247,007 108,862 78.80 71,627 120.17 0.0629
2024-02-14 2023-12-31 13F/A-2 Arista Networks Equity 040413106 138,145 14,476 11.71 32,533 43.03 0.0369
2024-02-07 2023-12-31 13F/A-1 Arista Networks Equity 040413106 117,099 -6,570 27,578 0.0039
2024-02-07 2023-12-31 13F Arista Networks Equity 040413106 117,099 -6,570 27,578 0.0319
2023-11-14 2023-09-30 13F Arista Networks Equity 040413106 123,669 -193,960 -61.06 22,746 -55.81 0.0292
2023-08-09 2023-06-30 13F Arista Networks Equity 040413106 317,629 149,872 89.34 51,475 82.80 0.0644
2023-05-12 2023-03-31 13F ARISTA NETWORKS EQUITY 040413106 167,757 2,683 1.63 28,160 40.58 0.0395
2023-02-14 2022-12-31 13F Arista Networks Equity 040413106 165,074 45,285 37.80 20,032 48.14 0.0308
2022-11-16 2022-09-30 13F/A-1 Arista Networks Equity 040413106 119,789 -37,588 -23.88 13,523 -8.34 0.0216
2022-11-15 2022-09-30 13F Arista Networks Equity 040413106 119,789 -37,588 13,523 0.0033
2022-08-12 2022-06-30 13F Arista Networks Equity 040413106 157,377 60,826 63.00 14,753 9.94 0.0230
2022-05-18 2022-03-31 13F/A-1 Arista Networks Equity 040413106 96,551 -76,374 -44.17 13,419 -46.02 0.0180
2022-02-09 2021-12-31 13F ARISTA NETWORKS EQUITY 040413106 172,925 140,937 440.59 24,858 126.14 0.0354
2021-11-16 2021-09-30 13F/A-1 ARISTA NETWORKS EQUITY 040413106 31,988 12,125 61.04 10,992 52.75 0.0156
2021-11-12 2021-09-30 13F ARISTA NETWORKS EQUITY 040413106 25,230 5,367 5,221 0.0000
2021-08-10 2021-06-30 13F ARISTA NETWORKS EQUITY 040413106 19,863 14,479 268.93 7,197 342.83 0.0095
2021-05-07 2021-03-31 13F ARISTA NETWORKS EQUITY 040413106 5,384 -13,277 -71.15 1,625 -70.03 0.0024
2021-02-10 2020-12-31 13F ARISTA NETWORKS EQUITY 040413106 18,661 -6,569 -26.04 5,422 3.87 0.0101
2020-10-30 2020-09-30 13F ARISTA NETWORKS EQUITY 040413106 25,230 -6,897 -21.47 5,221 -22.63 0.0075
2020-08-06 2020-06-30 13F ARISTA NETWORKS EQUITY 040413106 32,127 20,169 168.67 6,748 178.57 0.0119
2020-05-13 2020-03-31 13F ARISTA NETWORKS EQUITY 040413106 11,958 -1,030 -7.93 2,422 -8.29 0.0050
2020-02-12 2019-12-31 13F ARISTA NETWORKS EQUITY 040413106 12,988 4,737 57.41 2,642 33.99 0.0048
2019-11-07 2019-09-30 13F ARISTA NETWORKS EQUITY 040413106 8,251 -28,762 -77.71 1,971 -79.49 0.0035
2019-07-30 2019-06-30 13F ARISTA NETWORKS EQUITY 040413106 37,013 29,812 414.00 9,609 324.43 0.0191
2019-04-25 2019-03-31 13F ARISTA NETWORKS EQUITY 040413106 7,201 -7,392 -50.65 2,264 -26.35 0.0049
2019-02-12 2018-12-31 13F ARISTA NETWORKS EQUITY 040413106 14,593 -9,781 -40.13 3,075 -52.56 0.0073
2018-11-07 2018-09-30 13F ARISTA NETWORKS EQUITY 040413106 24,374 5,541 29.42 6,480 33.64 0.0096
2018-07-25 2018-06-30 13F ARISTA NETWORKS EQUITY 040413106 18,833 3,430 22.27 4,849 23.32 0.0081
2018-05-11 2018-03-31 13F ARISTA NETWORKS EQUITY 040413106 15,403 7,181 87.34 3,932 103.10 0.0074
2018-03-05 2017-12-31 13F/A-1 ARISTA NETWORKS EQUITY 040413106 8,222 -4,702 -36.38 1,937 -20.98 0.0034
2018-02-01 2017-12-31 13F ARISTA NETWORKS EQUITY 040413106 8,222 -4,702 1,937
2017-11-03 2017-09-30 13F ARISTA NETWORKS STOCK 040413106 12,924 3,591 38.48 2,451 75.38 0.0060
2017-08-03 2017-06-30 13F ARISTA NETWORKS STOCK 040413106 9,333 3,685 65.24 1,398 87.01 0.0042
2017-05-03 2017-03-31 13F ARISTA NETWORKS STOCK 040413106 5,648 3,268 137.31 747 224.78 0.0020
2017-02-14 2016-12-31 13F ARISTA NETWORKS STOCK 040413106 2,380 -4,954 -67.55 230 -63.08 0.0011
2016-10-05 2016-09-30 13F * ARISTA NETWORKS INC COM STOCK 040413106 7,334 6,636 950.72 624 1,315.91 0.0026
2016-07-06 2016-06-30 13F * ARISTA NETWORKS INC COM STOCK 040413106 698 -551 -44.12 45 -43.59 0.0002
2016-04-22 2016-03-31 13F * ARISTA NETWORKS INC COM STOCK 040413106 1,249 -534 -29.95 79 -43.48 0.0003
2016-04-19 2015-12-31 13F/A-1 * ARISTA NETWORKS INC COM STOCK 040413106 1,783 546 44.14 139 84.00 0.0007
2016-02-10 2015-12-31 13F * ARISTA NETWORKS INC COM STOCK 040413106 1,783 139
2015-11-13 2015-09-30 13F * ARISTA NETWORKS INC COM STOCK 040413106 1,237 -2,469 -66.62 76 -75.17 0.0002
2015-08-14 2015-06-30 13F ARISTA NETWORKS INC COM STOCK 040413106 3,706 1,153 45.16 303 67.78 0.0008
2015-05-15 2015-03-31 13F * ARISTA NETWORKS INC COM STOCK 040413106 2,553 594 30.32 180 51.26 0.0005
2015-03-10 2014-12-31 13F/A-1 * ARISTA NETWORKS INC COM STOCK 040413106 1,959 1,959 119 0.0004
2015-02-11 2014-12-31 13F * ARISTA NETWORKS INC COM STOCK 040413106 1,959 119 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
(%)
2026-05-12 2026-03-31 13F Arista Networks Option Call 0 -100.00 0 -100.00 n/a n/a n/a
2026-02-10 2025-12-31 13F Arista Networks Option Call 285 -33.72 3,734 -40.40 n/a n/a n/a
2025-11-13 2025-09-30 13F Arista Networks Option Call 430 -54.45 6,266 -35.13 n/a n/a n/a
2025-08-14 2025-06-30 13F Arista Networks Option Call 944 205.50 9,658 303.43 n/a n/a n/a
2025-05-14 2025-03-31 13F Arista Networks Option Call 309 10.75 2,394 -22.35 n/a n/a n/a
2025-02-14 2024-12-31 13F Arista Networks Option Call 279 933.33 3,084 197.59 n/a n/a n/a
2024-11-13 2024-09-30 13F Arista Networks Option Call 27 0.00 1,036 9.51 n/a n/a n/a
2024-08-13 2024-06-30 13F Arista Networks Option Call 27 0.00 946 20.97 n/a n/a n/a
2024-05-01 2024-03-31 13F Arista Networks Option Call 27 35.00 783 66.03 n/a n/a n/a
2024-02-14 2023-12-31 13F/A Arista Networks Option Call 20 471 n/a n/a n/a
2024-02-07 2023-12-31 13F/A Arista Networks Option Call 20 471 n/a n/a n/a
2024-02-07 2023-12-31 13F Arista Networks Option Call 20 471 n/a n/a n/a
2022-08-11 2022-06-30 13F Arista Networks Option Call 0 -100.00 0 -100.00 n/a n/a n/a
2022-05-18 2022-03-31 13F/A Arista Networks Option Call 100 -58.33 1,390 -59.74 n/a n/a n/a
2022-02-09 2021-12-31 13F ARISTA NETWORKS OPTION Call 240 300.00 3,450 67.39 n/a n/a n/a
2021-11-16 2021-09-30 13F/A ARISTA NETWORKS OPTION Call 60 -20.00 2,062 -24.14 n/a n/a n/a
2021-11-12 2021-09-30 13F ARISTA NETWORKS OPTION Call 75 1,552 n/a n/a n/a
2021-08-10 2021-06-30 13F ARISTA NETWORKS OPTION Call 75 2,717 n/a n/a n/a
2021-05-07 2021-03-31 13F ARISTA NETWORKS OPTION Call 0 -100.00 0 -100.00 n/a n/a n/a
2021-02-10 2020-12-31 13F ARISTA NETWORKS OPTION Call 75 0.00 2,179 40.49 n/a n/a n/a
2020-10-30 2020-09-30 13F ARISTA NETWORKS OPTION Call 75 0.00 1,552 -1.52 n/a n/a n/a
2020-08-06 2020-06-30 13F ARISTA NETWORKS OPTION Call 75 0.00 1,575 3.69 n/a n/a n/a
2020-05-13 2020-03-31 13F ARISTA NETWORKS OPTION Call 75 0.00 1,519 -0.39 n/a n/a n/a
2020-02-12 2019-12-31 13F ARISTA NETWORKS OPTION Call 75 1,526 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
(%)
2026-05-12 2026-03-31 13F Arista Networks Option Put 0 -100.00 0 -100.00 n/a n/a n/a
2026-02-10 2025-12-31 13F Arista Networks Option Put 744 -34.68 9,749 -41.26 n/a n/a n/a
2025-11-13 2025-09-30 13F Arista Networks Option Put 1,139 -4.37 16,596 36.20 n/a n/a n/a
2025-08-14 2025-06-30 13F Arista Networks Option Put 1,191 -87.50 12,185 -83.50 n/a n/a n/a
2025-05-14 2025-03-31 13F Arista Networks Option Put 9,530 1,377.52 73,838 935.74 n/a n/a n/a
2025-02-14 2024-12-31 13F Arista Networks Option Put 645 377.78 7,129 37.60 n/a n/a n/a
2024-11-13 2024-09-30 13F Arista Networks Option Put 135 50.00 5,182 64.27 n/a n/a n/a
2024-08-13 2024-06-30 13F Arista Networks Option Put 90 125.00 3,154 172.13 n/a n/a n/a
2024-05-01 2024-03-31 13F Arista Networks Option Put 40 0.00 1,160 23.04 n/a n/a n/a
2024-02-14 2023-12-31 13F/A Arista Networks Option Put 40 942 n/a n/a n/a
2024-02-07 2023-12-31 13F/A Arista Networks Option Put 40 942 n/a n/a n/a
2024-02-07 2023-12-31 13F Arista Networks Option Put 40 942 n/a n/a n/a
2022-08-11 2022-06-30 13F Arista Networks Option Put 0 -100.00 0 -100.00 n/a n/a n/a
2022-05-18 2022-03-31 13F/A Arista Networks Option Put 100 -66.67 1,390 -67.79 n/a n/a n/a
2022-02-09 2021-12-31 13F ARISTA NETWORKS OPTION Put 300 300.00 4,312 67.33 n/a n/a n/a
2021-11-16 2021-09-30 13F/A ARISTA NETWORKS OPTION Put 75 0.00 2,577 -5.15 n/a n/a n/a
2021-08-10 2021-06-30 13F ARISTA NETWORKS OPTION Put 75 2,717 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.