Kirby Corporation
DE ˙ DB ˙ US4972661064
121,00 € ↓ -2,00 (-1,63%)
2026-06-05
DEL PRIS
SecurityDE:KIY / Kirby Corporation
InstitutionMarshall Wace, Llp
Latest Disclosed Ownership2,800 shares
Latest Disclosed Value $ 372,064
Marshall Wace, Llp ownership in KIY / Kirby Corporation

On May 14, 2026 - Marshall Wace, Llp filed a 13F-HR form disclosing ownership of 2,800 shares of Kirby Corporation (DE:KIY) valued at $324,800 USD as of March 31, 2026. The entity filed a previous 13F-HR on November 13, 2025 disclosing 0 shares of Kirby Corporation. The current value of the position is $338,800 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)
2026-05-14 2026-03-31 13F KIRBY COMMON STOCK 497266106 2,800 2,800 372 0.0002
2025-11-13 2025-09-30 13F KIRBY COMMON STOCK 497266106 0 -206,182 -100.00 0 -100.00
2025-08-13 2025-06-30 13F KIRBY COMMON STOCK 497266106 206,182 206,182 23,383 0.0263
2024-05-15 2024-03-31 13F KIRBY COMMON STOCK 497266106 0 -3,335 -100.00 0 -100.00
2024-05-15 2024-03-31 13F KIRBY COMMON STOCK 497266106 0 0
2024-02-14 2023-12-31 13F KIRBY COMMON STOCK 497266106 3,335 3,335 262 0.0004
2023-08-14 2023-06-30 13F KIRBY COMMON STOCK 497266106 0 -143,157 -100.00 0 -100.00
2023-05-15 2023-03-31 13F KIRBY COMMON STOCK 497266106 143,157 143,157 9,978 0.0212
2023-02-14 2022-12-31 13F KIRBY COMMON STOCK 497266106 0 -304,632 -100.00 0 -100.00
2022-11-14 2022-09-30 13F KIRBY COMMON STOCK 497266106 304,632 -497,100 -62.00 18,513 -62.05 0.0406
2022-08-15 2022-06-30 13F KIRBY COMMON STOCK 497266106 801,732 96,007 13.60 48,777 -4.26 0.1003
2022-05-16 2022-03-31 13F KIRBY COMMON STOCK 497266106 705,725 198,981 39.27 50,946 69.19 0.0965
2022-02-14 2021-12-31 13F KIRBY COMMON STOCK 497266106 506,744 453,721 855.71 30,111 1,083.61 0.0556
2021-11-15 2021-09-30 13F KIRBY COMMON STOCK 497266106 53,023 47,737 903.08 2,544 692.52 0.0106
2021-08-13 2021-06-30 13F KIRBY COMMON STOCK 497266106 5,286 5,286 321 0.0016
2021-02-16 2020-12-31 13F KIRBY COMMON STOCK 497266106 0 -96,334 -100.00 0 -100.00
2020-11-16 2020-09-30 13F KIRBY COMMON STOCK 497266106 96,334 96,334 3,484 0.0223
2017-05-12 2017-03-31 13F KIRBY COMMON STOCK 497266106 0 -523,068 -100.00 0 -100.00
2017-02-10 2016-12-31 13F KIRBY COMMON STOCK 497266106 523,068 39,409 8.15 34,784 15.70 0.2287
2016-11-10 2016-09-30 13F KIRBY COMMON STOCK 497266106 483,659 267,826 124.09 30,064 123.26 0.2137
2016-08-12 2016-06-30 13F KIRBY COMMON STOCK 497266106 215,833 154,186 250.11 13,466 262.28 0.1132
2016-05-13 2016-03-31 13F KIRBY COMMON STOCK 497266106 61,647 34,275 125.22 3,717 158.13 0.0358
2016-02-10 2015-12-31 13F KIRBY COMMON STOCK 497266106 27,372 -99,896 -78.49 1,440 -81.74 0.0135
2015-11-12 2015-09-30 13F KIRBY COMMON STOCK 497266106 127,268 114,690 911.83 7,884 717.84 0.0969
2015-08-14 2015-06-30 13F KIRBY COMMON STOCK 497266106 12,578 12,578 -90.12 964 -87.77 0.0126
2014-11-13 2014-09-30 13F KIRBY COMMON STOCK 497266106 0 -8,588 -100.00 0 -100.00
2014-08-14 2014-06-30 13F KIRBY COMMON STOCK 497266106 8,588 8,588 1,006 0.0148
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.