Union Pacific Corporation
CH ˙ SWX ˙ US9078181081
SecurityCH:UNP / Union Pacific Corporation
InstitutionPrimecap Management Co/ca/
Latest Disclosed Ownership823,240 shares
Latest Disclosed Value $ 199,734,489
Primecap Management Co/ca/ reports 13.86% decrease in ownership of UNP / Union Pacific Corporation

On May 11, 2026 - Primecap Management Co/ca/ filed a 13F-HR form disclosing ownership of 823,240 shares of Union Pacific Corporation (CH:UNP) valued at $199,734,489 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 11, 2026 disclosing 955,740 shares of Union Pacific Corporation. This represents a change in shares of -13.86% 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 UNION PAC COM 907818108 823,240 -132,500 -13.86 199,734 -9.66 0.1573
2026-02-11 2025-12-31 13F UNION PAC COM 907818108 955,740 -92,400 -8.82 221,082 -10.76 0.1673
2025-11-12 2025-09-30 13F UNION PAC COM 907818108 1,048,140 -52,226 -4.75 247,749 -2.14 0.1897
2025-08-11 2025-06-30 13F UNION PAC COM 907818108 1,100,366 -383,314 -25.84 253,172 -27.77 0.2006
2025-05-09 2025-03-31 13F UNION PAC COM 907818108 1,483,680 -13,600 -0.91 350,505 2.65 0.2898
2025-02-10 2024-12-31 13F UNION PAC COM 907818108 1,497,280 -107,730 -6.71 341,440 -13.69 0.2644
2024-11-08 2024-09-30 13F UNION PAC COM 907818108 1,605,010 840 0.05 395,603 8.99 0.2909
2024-08-09 2024-06-30 13F UNION PAC COM 907818108 1,604,170 -9,630 -0.60 362,960 -8.55 0.2628
2024-05-14 2024-03-31 13F UNION PAC COM 907818108 1,613,800 -11,900 -0.73 396,882 -0.61 0.2960
2024-02-09 2023-12-31 13F UNION PAC COM 907818108 1,625,700 -3,500 -0.21 399,304 20.36 0.3161
2023-11-13 2023-09-30 13F UNION PAC COM 907818108 1,629,200 -22,500 -1.36 331,754 -1.84 0.2800
2023-08-11 2023-06-30 13F UNION PAC COM 907818108 1,651,700 -397,800 -19.41 337,971 -18.06 0.2824
2023-05-15 2023-03-31 13F UNION PAC COM 907818108 2,049,500 -541,400 -20.90 412,482 -23.12 0.3597
2023-02-13 2022-12-31 13F UNION PAC COM 907818108 2,590,900 -42,700 -1.62 536,498 4.56 0.4912
2022-11-14 2022-09-30 13F UNION PAC COM 907818108 2,633,600 -17,500 -0.66 513,078 -9.26 0.4965
2022-08-11 2022-06-30 13F UNION PAC COM 907818108 2,651,100 -47,512 -1.76 565,427 -23.31 0.5054
2022-05-11 2022-03-31 13F UNION PAC COM 907818108 2,698,612 -263,800 -8.90 737,288 -1.21 0.5561
2022-02-11 2021-12-31 13F UNION PAC COM 907818108 2,962,412 -100,700 -3.29 746,320 24.30 0.5166
2021-11-12 2021-09-30 13F UNION PAC COM 907818108 3,063,112 -5,700 -0.19 600,401 -11.04 0.4238
2021-08-10 2021-06-30 13F UNION PAC COM 907818108 3,068,812 -145,900 -4.54 674,924 -4.75 0.4535
2021-05-14 2021-03-31 13F UNION PAC COM 907818108 3,214,712 145,300 4.73 708,555 10.87 0.4941
2021-02-08 2020-12-31 13F UNION PAC COM 907818108 3,069,412 3,500 0.11 639,113 5.89 0.4750
2020-11-13 2020-09-30 13F UNION PACIFIC COM 907818108 3,065,912 -29,800 -0.96 603,586 15.32 0.4980
2020-08-13 2020-06-30 13F UNION PACIFIC COM 907818108 3,095,712 26,300 0.86 523,392 20.90 0.4491
2020-05-14 2020-03-31 13F UNION PACIFIC COM 907818108 3,069,412 423,500 16.01 432,910 -9.50 0.4245
2020-02-14 2019-12-31 13F UNION PACIFIC COM 907818108 2,645,912 -1,000 -0.04 478,354 11.57 0.3469
2019-11-13 2019-09-30 13F UNION PACIFIC COM 907818108 2,646,912 -44,750 -1.66 428,747 -5.81 0.3429
2019-08-14 2019-06-30 13F UNION PACIFIC COM 907818108 2,691,662 12,476 0.47 455,187 1.61 0.3366
2019-05-14 2019-03-31 13F UNION PACIFIC COM 907818108 2,679,186 -400 -0.01 447,960 20.94 0.3297
2019-02-12 2018-12-31 13F UNION PACIFIC COM 907818108 2,679,586 -101,001 -3.63 370,399 -18.19 0.3001
2018-11-13 2018-09-30 13F UNION PACIFIC COM 907818108 2,780,587 196,200 7.59 452,763 23.65 0.3056
2018-08-13 2018-06-30 13F UNION PACIFIC COM 907818108 2,584,387 199,500 8.37 366,156 14.21 0.2715
2018-05-14 2018-03-31 13F UNION PACIFIC COM 907818108 2,384,887 2,900 0.12 320,600 0.37 0.2406
2018-02-13 2017-12-31 13F UNION PACIFIC COM 907818108 2,381,987 217,862 10.07 319,424 27.27 0.2451
2017-11-13 2017-09-30 13F UNION PACIFIC COM 907818108 2,164,125 -1,064,200 -32.96 250,974 -28.62 0.2077
2017-08-11 2017-06-30 13F UNION PACIFIC COM 907818108 3,228,325 177,700 5.83 351,597 8.81 0.3020
2017-05-12 2017-03-31 13F UNION PACIFIC COM 907818108 3,050,625 -298,100 -8.90 323,122 -6.93 0.2933
2017-02-13 2016-12-31 13F UNION PACIFIC COM 907818108 3,348,725 -1,371,675 -29.06 347,196 -24.59 0.3416
2016-11-14 2016-09-30 13F UNION PACIFIC COM 907818108 4,720,400 41,575 0.89 460,381 12.78 0.4595
2016-08-12 2016-06-30 13F UNION PACIFIC COM 907818108 4,678,825 -14,275 -0.30 408,227 9.35 0.4347
2016-05-12 2016-03-31 13F UNION PACIFIC COM 907818108 4,693,100 -7,300 -0.16 373,336 1.57 0.3872
2016-02-12 2015-12-31 13F UNION PACIFIC COM 907818108 4,700,400 -26,150 -0.55 367,571 -12.04 0.3758
2015-11-12 2015-09-30 13F UNION PACIFIC COM 907818108 4,726,550 -29,825 -0.63 417,874 -7.88 0.4638
2015-08-13 2015-06-30 13F UNION PACIFIC COM 907818108 4,756,375 114,300 2.46 453,615 -9.78 0.4462
2015-05-14 2015-03-31 13F UNION PACIFIC COM 907818108 4,642,075 140,225 3.11 502,783 -6.25 0.4910
2015-02-12 2014-12-31 13F UNION PACIFIC COM 907818108 4,501,850 -211,550 -4.49 536,305 4.95 0.5435
2014-11-13 2014-09-30 13F UNION PACIFIC COM 907818108 4,713,400 -138,900 -2.86 511,027 5.58 0.5468
2014-08-14 2014-06-30 13F UNION PACIFIC COM 907818108 4,852,300 2,089,650 75.64 484,017 -6.64 0.5299
2014-05-14 2014-03-31 13F UNION PACIFIC COM 907818108 2,762,650 -139,635 -4.81 518,439 6.33 0.5868
2014-02-13 2013-12-31 13F UNION PACIFIC COM 907818108 2,902,285 -76,113 -2.56 487,584 5.39 0.5860
2013-11-13 2013-09-30 13F UNION PACIFIC COM 907818108 2,978,398 -9,800 -0.33 462,664 0.36 0.6087
2013-08-14 2013-06-30 13F UNION PACIFIC COM 907818108 2,988,198 2,988,198 461,019 0.6593
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.