Kirby Corporation
DE ˙ DB ˙ US4972661064
121,00 € ↓ -2,00 (-1,63%)
2026-06-05
DEL PRIS
SecurityDE:KIY / Kirby Corporation
InstitutionPrimecap Management Co/ca/
Latest Disclosed Ownership263,803 shares
Latest Disclosed Value $ 35,054,143
Primecap Management Co/ca/ reports 5.04% decrease in ownership of KIY / Kirby Corporation

On May 11, 2026 - Primecap Management Co/ca/ filed a 13F-HR form disclosing ownership of 263,803 shares of Kirby Corporation (DE:KIY) valued at $30,601,148 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 11, 2026 disclosing 277,803 shares of Kirby Corporation. This represents a change in shares of -5.04% during the quarter. The current value of the position is $31,920,163 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.

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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 KIRBY COM 497266106 263,803 -14,000 -5.04 35,054 14.53 0.0276
2026-02-11 2025-12-31 13F KIRBY COM 497266106 277,803 -8,050 -2.82 30,608 28.31 0.0232
2025-11-12 2025-09-30 13F KIRBY COM 497266106 285,853 44,000 18.19 23,854 -13.03 0.0183
2025-08-11 2025-06-30 13F KIRBY COM 497266106 241,853 -22,497 -8.51 27,429 2.72 0.0217
2025-05-09 2025-03-31 13F KIRBY COM 497266106 264,350 -5,800 -2.15 26,702 -6.58 0.0221
2025-02-10 2024-12-31 13F KIRBY COM 497266106 270,150 2,150 0.80 28,582 -12.89 0.0221
2024-11-08 2024-09-30 13F KIRBY COM 497266106 268,000 -14,100 -5.00 32,811 -2.85 0.0241
2024-08-09 2024-06-30 13F KIRBY COM 497266106 282,100 -35,500 -11.18 33,776 11.57 0.0245
2024-05-14 2024-03-31 13F KIRBY COM 497266106 317,600 -10,900 -3.32 30,274 17.43 0.0226
2024-02-09 2023-12-31 13F KIRBY COM 497266106 328,500 -19,200 -5.52 25,781 -10.45 0.0204
2023-11-13 2023-09-30 13F KIRBY COM 497266106 347,700 -5,400 -1.53 28,790 5.95 0.0243
2023-08-11 2023-06-30 13F KIRBY COM 497266106 353,100 -14,000 -3.81 27,171 6.19 0.0227
2023-05-15 2023-03-31 13F KIRBY COM 497266106 367,100 -36,400 -9.02 25,587 -1.46 0.0223
2023-02-13 2022-12-31 13F KIRBY COM 497266106 403,500 -13,200 -3.17 25,965 2.54 0.0238
2022-11-14 2022-09-30 13F KIRBY COM 497266106 416,700 -8,100 -1.91 25,323 -2.02 0.0245
2022-08-11 2022-06-30 13F KIRBY COM 497266106 424,800 -17,200 -3.89 25,845 -19.00 0.0231
2022-05-11 2022-03-31 13F KIRBY COM 497266106 442,000 -600 -0.14 31,908 21.33 0.0241
2022-02-11 2021-12-31 13F KIRBY COM 497266106 442,600 -4,200 -0.94 26,299 22.73 0.0182
2021-11-12 2021-09-30 13F KIRBY COM 497266106 446,800 -3,300 -0.73 21,429 -21.49 0.0151
2021-08-10 2021-06-30 13F KIRBY COM 497266106 450,100 0 0.00 27,294 0.60 0.0183
2021-05-14 2021-03-31 13F KIRBY COM 497266106 450,100 -2,500 -0.55 27,132 15.66 0.0189
2021-02-08 2020-12-31 13F KIRBY COM 497266106 452,600 452,600 23,458 0.0174
2019-02-12 2018-12-31 13F KIRBY COM 497266106 0 -3,000 -100.00 0 -100.00
2018-11-13 2018-09-30 13F KIRBY COM 497266106 3,000 0 0.00 247 -1.59 0.0002
2018-08-13 2018-06-30 13F KIRBY COM 497266106 3,000 0 0.00 251 8.66 0.0002
2018-05-14 2018-03-31 13F KIRBY COM 497266106 3,000 0 0.00 231 15.50 0.0002
2018-02-13 2017-12-31 13F KIRBY COM 497266106 3,000 -600 -16.67 200 -15.61 0.0002
2017-11-13 2017-09-30 13F KIRBY COM 497266106 3,600 0 0.00 237 -1.66 0.0002
2017-08-11 2017-06-30 13F KIRBY COM 497266106 3,600 0 0.00 241 -5.12 0.0002
2017-05-12 2017-03-31 13F KIRBY COM 497266106 3,600 -603,295 -99.41 254 -99.37 0.0002
2017-02-13 2016-12-31 13F KIRBY COM 497266106 606,895 -16,950 -2.72 40,359 4.08 0.0397
2016-11-14 2016-09-30 13F KIRBY COM 497266106 623,845 -91,950 -12.85 38,778 -13.17 0.0387
2016-08-12 2016-06-30 13F KIRBY COM 497266106 715,795 -76,600 -9.67 44,658 -6.52 0.0476
2016-05-12 2016-03-31 13F KIRBY COM 497266106 792,395 195,245 32.70 47,773 52.04 0.0495
2016-02-12 2015-12-31 13F KIRBY COM 497266106 597,150 -50,950 -7.86 31,422 -21.74 0.0321
2015-11-12 2015-09-30 13F KIRBY COM 497266106 648,100 -53,500 -7.63 40,150 -25.35 0.0446
2015-08-13 2015-06-30 13F KIRBY COM 497266106 701,600 -9,474 -1.33 53,785 0.79 0.0529
2015-05-14 2015-03-31 13F KIRBY COM 497266106 711,074 -839 -0.12 53,366 -7.16 0.0521
2015-02-12 2014-12-31 13F KIRBY COM 497266106 711,913 -83,350 -10.48 57,480 -38.67 0.0582
2014-11-13 2014-09-30 13F KIRBY COM 497266106 795,263 -49,826 -5.90 93,722 -5.33 0.1003
2014-08-14 2014-06-30 13F KIRBY COM 497266106 845,089 -66,000 -7.24 98,994 7.31 0.1084
2014-05-14 2014-03-31 13F KIRBY COM 497266106 911,089 -34,100 -3.61 92,248 -1.67 0.1044
2014-02-13 2013-12-31 13F KIRBY COM 497266106 945,189 -41,111 -4.17 93,810 9.89 0.1127
2013-11-13 2013-09-30 13F KIRBY COM 497266106 986,300 -76,900 -7.23 85,364 0.94 0.1123
2013-08-14 2013-06-30 13F KIRBY COM 497266106 1,063,200 1,063,200 84,567 0.1209
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.