Cisco Systems, Inc.
MX ˙ BMV ˙ US17275R1023
SecurityMX:CSCO / Cisco Systems, Inc.
InstitutionPrimecap Management Co/ca/
Latest Disclosed Ownership4,839,160 shares
Latest Disclosed Value $ 375,470,425
Primecap Management Co/ca/ reports 0.04% decrease in ownership of CSCO / Cisco Systems, Inc.

On May 11, 2026 - Primecap Management Co/ca/ filed a 13F-HR form disclosing ownership of 4,839,160 shares of Cisco Systems, Inc. (MX:CSCO) valued at $375,470,425 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 11, 2026 disclosing 4,841,060 shares of Cisco Systems, Inc.. This represents a change in shares of -0.04% 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)
2026-05-11 2026-03-31 13F CISCO SYS COM 17275R102 4,839,160 -1,900 -0.04 375,470 0.69 0.2956
2026-02-11 2025-12-31 13F CISCO SYS COM 17275R102 4,841,060 -407,500 -7.76 372,907 3.84 0.2823
2025-11-12 2025-09-30 13F CISCO SYS COM 17275R102 5,248,560 -250,800 -4.56 359,106 -5.88 0.2750
2025-08-11 2025-06-30 13F CISCO SYS COM 17275R102 5,499,360 -25,170 -0.46 381,546 11.92 0.3024
2025-05-09 2025-03-31 13F CISCO SYS COM 17275R102 5,524,530 -16,500 -0.30 340,919 3.93 0.2818
2025-02-10 2024-12-31 13F CISCO SYS COM 17275R102 5,541,030 -165,779 -2.90 328,029 8.00 0.2541
2024-11-08 2024-09-30 13F CISCO SYS COM 17275R102 5,706,809 -94,600 -1.63 303,716 10.19 0.2233
2024-08-09 2024-06-30 13F CISCO SYS COM 17275R102 5,801,409 -151,081 -2.54 275,625 -7.22 0.1995
2024-05-14 2024-03-31 13F CISCO SYS COM 17275R102 5,952,490 -897,200 -13.10 297,089 -14.15 0.2216
2024-02-09 2023-12-31 13F CISCO SYS COM 17275R102 6,849,690 -195,000 -2.77 346,046 -8.63 0.2740
2023-11-13 2023-09-30 13F CISCO SYS COM 17275R102 7,044,690 -56,430 -0.79 378,723 3.08 0.3197
2023-08-11 2023-06-30 13F CISCO SYS COM 17275R102 7,101,120 -179,500 -2.47 367,412 -3.46 0.3070
2023-05-15 2023-03-31 13F CISCO SYS COM 17275R102 7,280,620 -251,600 -3.34 380,594 6.06 0.3319
2023-02-13 2022-12-31 13F CISCO SYS COM 17275R102 7,532,220 -114,270 -1.49 358,835 17.32 0.3285
2022-11-14 2022-09-30 13F CISCO SYS COM 17275R102 7,646,490 197,300 2.65 305,860 -3.71 0.2960
2022-08-11 2022-06-30 13F CISCO SYS COM 17275R102 7,449,190 -49,300 -0.66 317,633 -24.03 0.2839
2022-05-11 2022-03-31 13F CISCO SYS COM 17275R102 7,498,490 -288,500 -3.70 418,116 -15.27 0.3154
2022-02-11 2021-12-31 13F CISCO SYS COM 17275R102 7,786,990 -1,045,900 -11.84 493,462 2.64 0.3416
2021-11-12 2021-09-30 13F CISCO SYS COM 17275R102 8,832,890 -124,300 -1.39 480,774 1.27 0.3394
2021-08-10 2021-06-30 13F CISCO SYS COM 17275R102 8,957,190 -303,575 -3.28 474,731 -0.87 0.3190
2021-05-14 2021-03-31 13F CISCO SYS COM 17275R102 9,260,765 -473,300 -4.86 478,874 9.93 0.3339
2021-02-08 2020-12-31 13F CISCO SYS COM 17275R102 9,734,065 -611,300 -5.91 435,599 6.89 0.3238
2020-11-13 2020-09-30 13F CISCO SYSTEMS COM 17275R102 10,345,365 -162,100 -1.54 407,504 -16.85 0.3362
2020-08-13 2020-06-30 13F CISCO SYSTEMS COM 17275R102 10,507,465 -405,000 -3.71 490,068 14.24 0.4205
2020-05-14 2020-03-31 13F CISCO SYSTEMS COM 17275R102 10,912,465 -7,821,471 -41.75 428,969 -52.26 0.4206
2020-02-14 2019-12-31 13F CISCO SYSTEMS COM 17275R102 18,733,936 -38,400 -0.20 898,480 -3.13 0.6516
2019-11-13 2019-09-30 13F CISCO SYSTEMS COM 17275R102 18,772,336 -1,194,575 -5.98 927,541 -15.12 0.7418
2019-08-14 2019-06-30 13F CISCO SYSTEMS COM 17275R102 19,966,911 -154,000 -0.77 1,092,789 0.59 0.8081
2019-05-14 2019-03-31 13F CISCO SYSTEMS COM 17275R102 20,120,911 -2,833,700 -12.34 1,086,328 9.22 0.7995
2019-02-12 2018-12-31 13F CISCO SYSTEMS COM 17275R102 22,954,611 -2,664,275 -10.40 994,623 -20.20 0.8059
2018-11-13 2018-09-30 13F CISCO SYSTEMS COM 17275R102 25,618,886 -225,325 -0.87 1,246,359 12.07 0.8413
2018-08-13 2018-06-30 13F CISCO SYSTEMS COM 17275R102 25,844,211 -105,275 -0.41 1,112,076 -0.08 0.8245
2018-05-14 2018-03-31 13F CISCO SYSTEMS COM 17275R102 25,949,486 -597,121 -2.25 1,112,973 9.47 0.8351
2018-02-13 2017-12-31 13F CISCO SYSTEMS COM 17275R102 26,546,607 -995,283 -3.61 1,016,735 9.77 0.7803
2017-11-13 2017-09-30 13F CISCO SYSTEMS COM 17275R102 27,541,890 -462,625 -1.65 926,234 5.67 0.7666
2017-08-11 2017-06-30 13F CISCO SYSTEMS COM 17275R102 28,004,515 1,201,500 4.48 876,541 -3.25 0.7530
2017-05-12 2017-03-31 13F CISCO SYSTEMS COM 17275R102 26,803,015 -151,725 -0.56 905,942 11.22 0.8223
2017-02-13 2016-12-31 13F CISCO SYSTEMS COM 17275R102 26,954,740 -671,450 -2.43 814,572 -7.04 0.8015
2016-11-14 2016-09-30 13F CISCO SYSTEMS COM 17275R102 27,626,190 -990,675 -3.46 876,303 6.73 0.8746
2016-08-12 2016-06-30 13F CISCO SYSTEMS COM 17275R102 28,616,865 -510,150 -1.75 821,018 -0.99 0.8742
2016-05-12 2016-03-31 13F CISCO SYSTEMS COM 17275R102 29,127,015 4,013,625 15.98 829,246 21.60 0.8601
2016-02-12 2015-12-31 13F CISCO SYSTEMS COM 17275R102 25,113,390 254,876 1.03 681,954 4.51 0.6972
2015-11-12 2015-09-30 13F CISCO SYSTEMS COM 17275R102 24,858,514 -999,950 -3.87 652,536 -8.10 0.7243
2015-08-13 2015-06-30 13F CISCO SYSTEMS COM 17275R102 25,858,464 -60,400 -0.23 710,073 -0.45 0.6984
2015-05-14 2015-03-31 13F CISCO SYSTEMS COM 17275R102 25,918,864 917,125 3.67 713,287 2.55 0.6966
2015-02-12 2014-12-31 13F CISCO SYSTEMS COM 17275R102 25,001,739 -8,450 -0.03 695,548 10.49 0.7048
2014-11-13 2014-09-30 13F CISCO SYSTEMS COM 17275R102 25,010,189 -60,200 -0.24 629,506 1.04 0.6735
2014-08-14 2014-06-30 13F CISCO SYSTEMS COM 17275R102 25,070,389 1,656,100 7.07 622,999 18.68 0.6821
2014-05-14 2014-03-31 13F CISCO SYSTEMS COM 17275R102 23,414,289 18,049,000 336.40 524,948 336.21 0.5941
2014-02-13 2013-12-31 13F CISCO SYSTEMS COM 17275R102 5,365,289 609,750 12.82 120,343 8.05 0.1446
2013-11-13 2013-09-30 13F CISCO SYSTEMS COM 17275R102 4,755,539 120,700 2.60 111,375 -1.15 0.1465
2013-08-14 2013-06-30 13F CISCO SYSTEMS COM 17275R102 4,634,839 4,634,839 112,673 0.1611
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.