Rockwell Automation, Inc.
US ˙ NYSE ˙ US7739031091

SecurityROK / Rockwell Automation, Inc.
InstitutionMarkel Corp
Latest Disclosed Ownership154,900 shares
Latest Disclosed Value $ 55,590,512
Markel Corp ownership in ROK / Rockwell Automation, Inc.

On May 1, 2026 - Markel Corp filed a 13F-HR form disclosing ownership of 154,900 shares of Rockwell Automation, Inc. (US:ROK) valued at $55,590,512 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 6, 2026 disclosing 154,900 shares of Rockwell Automation, Inc.. This represents a change in shares of 0.00% during the quarter. The current value of the position is $71,521,977 USD.

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.

Upgrade to unlock premium data and export to Excel .

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 ROCKWELL AUTOMATION COM 773903109 154,900 0 0.00 55,591 -7.76 0.4015
2026-02-06 2025-12-31 13F ROCKWELL AUTOMATION COM 773903109 154,900 0 0.00 60,267 11.31 0.4804
2025-10-31 2025-09-30 13F ROCKWELL AUTOMATION COM 773903109 154,900 0 0.00 54,142 5.23 0.4394
2025-08-01 2025-06-30 13F ROCKWELL AUTOMATION COM 773903109 154,900 0 0.00 51,453 28.56 0.4350
2025-05-02 2025-03-31 13F ROCKWELL AUTOMATION COM 773903109 154,900 0 0.00 40,023 -9.59 0.3554
2025-02-07 2024-12-31 13F ROCKWELL AUTOMATION COM 773903109 154,900 0 0.00 44,269 6.45 0.3902
2024-11-01 2024-09-30 13F ROCKWELL AUTOMATION COM 773903109 154,900 0 0.00 41,584 -2.48 0.3743
2024-08-02 2024-06-30 13F ROCKWELL AUTOMATION COM 773903109 154,900 0 0.00 42,641 -5.51 0.4195
2024-05-03 2024-03-31 13F ROCKWELL AUTOMATION COM 773903109 154,900 0 0.00 45,127 -6.17 0.4450
2024-02-02 2023-12-31 13F ROCKWELL AUTOMATION COM 773903109 154,900 0 0.00 48,093 8.61 0.5228
2023-11-03 2023-09-30 13F ROCKWELL AUTOMATION COM 773903109 154,900 0 0.00 44,281 -13.23 0.5346
2023-08-04 2023-06-30 13F ROCKWELL AUTOMATION COM 773903109 154,900 0 0.00 51,032 12.27 0.6076
2023-04-28 2023-03-31 13F ROCKWELL AUTOMATION COM 773903109 154,900 0 0.00 45,455 13.93 0.5783
2023-02-03 2022-12-31 13F ROCKWELL AUTOMATION COM 773903109 154,900 0 0.00 39,898 19.74 0.5349
2022-11-04 2022-09-30 13F ROCKWELL AUTOMATION COM 773903109 154,900 0 0.00 33,321 7.93 0.4918
2022-08-05 2022-06-30 13F ROCKWELL AUTOMATION COM 773903109 154,900 2,000 1.31 30,873 -27.89 0.4414
2022-04-29 2022-03-31 13F ROCKWELL AUTOMATION COM 773903109 152,900 2,000 1.33 42,816 -18.67 0.4753
2022-02-04 2021-12-31 13F ROCKWELL AUTOMATION COM 773903109 150,900 3,000 2.03 52,642 21.05 0.6057
2021-11-05 2021-09-30 13F ROCKWELL AUTOMATION COM 773903109 147,900 5,800 4.08 43,489 7.00 0.5498
2021-08-06 2021-06-30 13F ROCKWELL AUTOMATION COM 773903109 142,100 0 0.00 40,644 7.75 0.5145
2021-04-30 2021-03-31 13F ROCKWELL AUTOMATION COM 773903109 142,100 0 0.00 37,719 5.83 0.5220
2021-02-05 2020-12-31 13F ROCKWELL AUTOMATION COM 773903109 142,100 0 0.00 35,640 13.66 0.5309
2020-10-30 2020-09-30 13F Rockwell Automation COM 773903109 142,100 0 0.00 31,358 3.60 0.5318
2020-08-03 2020-06-30 13F Rockwell Automation COM 773903109 142,100 0 0.00 30,268 41.15 0.5639
2020-05-01 2020-03-31 13F Rockwell Automation COM 773903109 142,100 2,000 1.43 21,444 -24.48 0.4033
2020-02-07 2019-12-31 13F Rockwell Automation COM 773903109 140,100 5,500 4.09 28,394 28.00 0.3942
2019-11-01 2019-09-30 13F Rockwell Automation COM 773903109 134,600 6,800 5.32 22,182 5.94 0.3352
2019-08-02 2019-06-30 13F Rockwell Automation COM 773903109 127,800 0 0.00 20,938 -6.63 0.3219
2019-05-03 2019-03-31 13F Rockwell Automation COM 773903109 127,800 0 0.00 22,424 16.60 0.3758
2019-02-08 2018-12-31 13F Rockwell Automation COM 773903109 127,800 0 0.00 19,232 -19.75 0.3675
2018-11-02 2018-09-30 13F Rockwell Automation COM 773903109 127,800 0 0.00 23,965 12.81 0.4042
2018-08-03 2018-06-30 13F Rockwell Automation COM 773903109 127,800 0 0.00 21,244 -4.58 0.3899
2018-04-27 2018-03-31 13F Rockwell Automation COM 773903109 127,800 0 0.00 22,263 -11.28 0.4232
2018-02-09 2017-12-31 13F Rockwell Automation COM 773903109 127,800 0 0.00 25,094 10.18 0.4738
2017-10-27 2017-09-30 13F Rockwell Automation COM 773903109 127,800 10,000 8.49 22,775 19.37 0.4535
2017-07-28 2017-06-30 13F Rockwell Automation COM 773903109 117,800 13,000 12.40 19,079 16.92 0.4069
2017-04-28 2017-03-31 13F Rockwell Automation COM 773903109 104,800 13,000 14.16 16,318 32.26 0.3676
2017-02-10 2016-12-31 13F Rockwell Automation COM 773903109 91,800 12,000 15.04 12,338 26.38 0.2974
2016-11-04 2016-09-30 13F Rockwell Automation COM 773903109 79,800 21,000 35.71 9,763 44.62 0.2517
2016-08-05 2016-06-30 13F Rockwell Automation COM 773903109 58,800 8,600 17.13 6,751 18.23 0.1779
2016-05-06 2016-03-31 13F Rockwell Automation COM 773903109 50,200 2,700 5.68 5,710 17.15 0.1533
2016-02-16 2015-12-31 13F Rockwell Automation COM 773903109 47,500 11,500 31.94 4,874 33.42 0.1319
2015-11-09 2015-09-30 13F Rockwell Automation COM 773903109 36,000 18,000 100.00 3,653 62.79 0.0962
2015-08-14 2015-06-30 13F Rockwell Automation COM 773903109 18,000 18,000 2,244 0.0560
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.