Arista Networks, Inc.
MX ˙ BMV ˙ US0404132054
SecurityMX:ANET / Arista Networks, Inc.
InstitutionPittenger & Anderson Inc
Latest Disclosed Ownership46,539 shares
Latest Disclosed Value $ 5,714,059
Pittenger & Anderson Inc reports 16.66% increase in ownership of ANET / Arista Networks, Inc.

On May 1, 2026 - Pittenger & Anderson Inc filed a 13F-HR form disclosing ownership of 46,539 shares of Arista Networks, Inc. (MX:ANET) valued at $5,714,059 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 2, 2026 disclosing 39,892 shares of Arista Networks, Inc.. This represents a change in shares of 16.66% 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)
2026-05-01 2026-03-31 13F ARISTA NETWORKS COM SHS 040413205 46,539 6,647 16.66 5,714 9.32 0.2274
2026-02-02 2025-12-31 13F ARISTA NETWORKS COM SHS 040413205 39,892 -71,312 -64.13 5,227 -67.74 0.2011
2025-11-03 2025-09-30 13F ARISTA NETWORKS COM SHS 040413205 111,204 27,708 33.18 16,204 89.69 0.5942
2025-07-30 2025-06-30 13F ARISTA NETWORKS COM SHS 040413205 83,496 48,980 141.91 8,542 219.45 0.3123
2025-05-01 2025-03-31 13F ARISTA NETWORKS COM SHS 040413205 34,516 -96 -0.28 2,674 -30.09 0.0980
2025-01-31 2024-12-31 13F ARISTA NETWORKS COM SHS 040413205 34,612 25,978 300.88 3,826 15.45 0.1390
2024-10-30 2024-09-30 13F ARISTA NETWORKS COM 040413106 8,634 538 6.65 3,314 16.78 0.1241
2024-08-09 2024-06-30 13F ARISTA NETWORKS COM 040413106 8,096 -534 -6.19 2,837 13.39 0.1166
2024-05-02 2024-03-31 13F ARISTA NETWORKS COM 040413106 8,630 235 2.80 2,503 26.56 0.1017
2024-02-02 2023-12-31 13F ARISTA NETWORKS COM 040413106 8,395 2,205 35.62 1,977 73.73 0.0886
2023-11-02 2023-09-30 13F ARISTA NETWORKS COM 040413106 6,190 2,155 53.41 1,139 74.27 0.0574
2023-08-09 2023-06-30 13F ARISTA NETWORKS COM 040413106 4,035 0 0.00 654 -3.55 0.0315
2023-05-10 2023-03-31 13F ARISTA NETWORKS COM 040413106 4,035 0 0.00 677 38.45 0.0350
2023-02-10 2022-12-31 13F ARISTA NETWORKS COM 040413106 4,035 -1,562 -27.91 490 -22.63 0.0269
2022-11-15 2022-09-30 13F ARISTA NETWORKS COM 040413106 5,597 0 0.00 632 20.38 0.0380
2022-07-14 2022-06-30 13F ARISTA NETWORKS COM 040413106 5,597 9 0.16 525 -32.43 0.0306
2022-04-28 2022-03-31 13F ARISTA NETWORKS COM 040413106 5,588 0 0.00 777 -3.24 0.0381
2022-02-10 2021-12-31 13F ARISTA NETWORKS COM 040413106 5,588 4,191 300.00 803 67.29 0.0371
2021-11-12 2021-09-30 13F ARISTA NETWORKS COM 040413106 1,397 3 0.22 480 -4.95 0.0241
2021-08-13 2021-06-30 13F ARISTA NETWORKS COM 040413106 1,394 4 0.29 505 20.24 0.0259
2021-05-12 2021-03-31 13F ARISTA NETWORKS COM 040413106 1,390 0 0.00 420 3.96 0.0227
2021-02-11 2020-12-31 13F ARISTA NETWORKS COM 040413106 1,390 -40 -2.80 404 36.49 0.0229
2020-11-10 2020-09-30 13F ARISTA NETWORKS COM 040413106 1,430 367 34.52 296 32.74 0.0189
2020-08-13 2020-06-30 13F ARISTA NETWORKS COM 040413106 1,063 100 10.38 223 14.36 0.0157
2020-04-30 2020-03-31 13F ARISTA NETWORKS COM 040413106 963 -25 -2.53 195 -2.99 0.0166
2020-02-12 2019-12-31 13F ARISTA NETWORKS COM 040413106 988 -4,751 -82.78 201 -85.34 0.0134
2019-11-14 2019-09-30 13F ARISTA NETWORKS COM 040413106 5,739 406 7.61 1,371 -1.01 0.0989
2019-08-09 2019-06-30 13F ARISTA NETWORKS COM 040413106 5,333 1,403 35.70 1,385 12.06 0.1036
2019-05-10 2019-03-31 13F ARISTA NETWORKS COM 040413106 3,930 545 16.10 1,236 73.35 0.0967
2019-02-14 2018-12-31 13F ARISTA NETWORKS COM 040413106 3,385 -1,748 -34.05 713 -47.77 0.0655
2018-10-12 2018-09-30 13F ARISTA NETWORKS COM 040413106 5,133 1,050 25.72 1,365 29.88 0.1077
2018-08-15 2018-06-30 13F ARISTA NETWORKS COM 040413106 4,083 223 5.78 1,051 6.70 0.0899
2018-05-08 2018-03-31 13F ARISTA NETWORKS COM 040413106 3,860 2,170 128.40 985 147.49 0.0863
2018-02-13 2017-12-31 13F ARISTA NETWORKS COM 040413106 1,690 -265 -13.55 398 7.28 0.0348
2017-11-13 2017-09-30 13F ARISTA NETWORKS COM 040413106 1,955 290 17.42 371 49.00 0.0337
2017-08-10 2017-06-30 13F ARISTA NETWORKS COM 040413106 1,665 325 24.25 249 40.68 0.0238
2017-05-15 2017-03-31 13F ARISTA NETWORKS COM 040413106 1,340 -595 -30.75 177 -5.35 0.0178
2017-02-16 2016-12-31 13F ARISTA NETWORKS COM 040413106 1,935 1,390 255.05 187 306.52 0.0199
2016-11-14 2016-09-30 13F ARISTA NETWORKS COM 040413106 545 500 1,111.11 46 1,433.33 0.0051
2016-08-09 2016-06-30 13F ARISTA NETWORKS COM 040413106 45 -100 -68.97 3 -66.67 0.0003
2016-05-13 2016-03-31 13F ARISTA NETWORKS COM 040413106 145 15 11.54 9 -10.00 0.0010
2016-02-10 2015-12-31 13F ARISTA NETWORKS COM 040413106 130 -290 -69.05 10 -61.54 0.0013
2015-11-10 2015-09-30 13F ARISTA NETWORKS COM 040413106 420 -215 -33.86 26 -50.00 0.0034
2015-08-14 2015-06-30 13F ARISTA NETWORKS COM 040413106 635 635 52 0.0067
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.