Kirby Corporation
US ˙ NYSE ˙ US4972661064

SecurityKEX / Kirby Corporation
InstitutionSimplex Trading, Llc
Latest Disclosed Ownership0 shares
Latest Disclosed Value $ 0
Simplex Trading, Llc ownership in KEX / Kirby Corporation

On February 11, 2026 - Simplex Trading, Llc filed a 13F-HR form disclosing ownership of 0 shares of Kirby Corporation (US:KEX) valued at $0 USD as of December 31, 2025. The entity filed a previous 13F-HR on November 12, 2025 disclosing 891 shares of Kirby Corporation. The current value of the position is $0 USD.

Simplex Trading, Llc has a history of taking positions in derivatives of the underlying security (KEX) in the form of stock options. The firm currently holds call options representing 100 of underlying shares valued at $13,288 USD and put options representing 0 of underlying shares valued at $0 USD .

Note: prior versions of this page mistakenly stated that the share values represented the number of options, not the number of underlying shares. For more information on the data backing these reports, please see the SEC document Frequently Asked Questions About Form 13F.

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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Institutional Put/Call Ratios
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In addition to reporting standard equity and debt issues, institutions with more than 100MM assets under management must also disclose their put and call option holdings. Since put options generally indicate negative sentiment, and call options indicate positive sentiment, we can get a sense of the overall institutional sentiment by plotting the ratio of puts to calls. The chart to the right plots the historical put/call ratio for this instrument.

Using Put/Call Ratio as an indicator of investor sentiment overcomes one of the key deficiencies of using total institutional ownership, which is that a significant amount of assets under management are invested passively to track indices. Passively-managed funds do not typically buy options, so the put/call ratio indicator more closely tracks the sentiment of actively-managed funds.

KEX / Kirby Corporation Historical Put/Call Ratio
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)
2026-02-11 2025-12-31 13F KIRBY COM 497266106 0 -891 -100.00 0 0.0000
2025-11-12 2025-09-30 13F KIRBY COM 497266106 891 806 948.24 0 0.0000
2025-08-05 2025-06-30 13F KIRBY COM 497266106 85 85 0 0.0000
2025-02-11 2024-12-31 13F KIRBY COM 497266106 0 -138 -100.00 0 0.0000
2024-11-08 2024-09-30 13F KIRBY COM 497266106 138 -1,800 -92.88 0 0.0000
2024-07-25 2024-06-30 13F KIRBY COM 497266106 1,938 1,938 0 0.0001
2022-11-04 2022-09-30 13F KIRBY COM 497266106 0 -496 -100.00 0 -100.00
2022-08-03 2022-06-30 13F KIRBY COM 497266106 496 -1,195 -70.67 30 -75.41 0.0000
2022-05-02 2022-03-31 13F KIRBY COM 497266106 1,691 -35,490 -95.45 122 -94.48 0.0001
2022-02-23 2021-12-31 13F/A-1 KIRBY COM 497266106 37,181 36,812 9,976.15 2,209 9,940.91 0.0022
2022-02-04 2021-12-31 13F KIRBY COM 497266106 369 0 22 0.0000
2021-10-28 2021-09-30 13F KIRBY COM 497266106 369 0 0.00 22 0.00 0.0000
2021-08-12 2021-06-30 13F KIRBY COM 497266106 369 -2,685 -87.92 22 -88.04 0.0000
2021-04-26 2021-03-31 13F KIRBY COM 497266106 3,054 889 41.06 184 64.29 0.0003
2021-02-02 2020-12-31 13F KIRBY COM 497266106 2,165 -5,762 -72.69 112 -60.84 0.0001
2020-10-14 2020-09-30 13F KIRBY COM 497266106 7,927 7,774 5,081.05 286 3,475.00 0.0004
2020-07-13 2020-06-30 13F KIRBY COM 497266106 153 -1,412 -90.22 8 -88.24 0.0000
2020-04-29 2020-03-31 13F KIRBY COM 497266106 1,565 633 67.92 68 -18.07 0.0001
2020-02-05 2019-12-31 13F KIRBY COM 497266106 932 932 -40.45 83 22.06 0.0002
2019-10-15 2019-09-30 13F KIRBY COM 497266106 0 -2,844 -100.00 0 -100.00
2019-07-26 2019-06-30 13F KIRBY COM 497266106 2,844 2,844 224 0.0006
2018-10-23 2018-09-30 13F KIRBY COM 497266106 0 -3,587 -100.00 0 -100.00
2018-07-30 2018-06-30 13F KIRBY COM 497266106 3,587 3,587 299 0.0012
2017-01-11 2016-12-31 13F KIRBY COM 497266106 0 -360 -100.00 0 -100.00
2016-10-07 2016-09-30 13F KIRBY COM 497266106 360 315 700.00 22 1,000.00 0.0015
2016-07-18 2016-06-30 13F KIRBY COM 497266106 45 45 -87.50 2 -90.91 0.0001
2016-04-14 2016-03-31 13F KIRBY COM 497266106 0 -61 -100.00 0 -100.00
2016-01-20 2015-12-31 13F KIRBY COM 497266106 61 54 771.43 3 0.0002
2015-10-08 2015-09-30 13F KIRBY COM 497266106 7 -532 -98.70 0 -100.00
2015-07-08 2015-06-30 13F KIRBY COM 497266106 539 192 55.33 41 57.69 0.0034
2015-04-21 2015-03-31 13F KIRBY COM 497266106 347 -607 -63.63 26 -66.23 0.0030
2015-03-04 2014-12-31 13F KIRBY COM 497266106 954 954 77 0.0093
Disclosed Call Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share
Price
Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2026-05-14 2026-03-31 13F KIRBY CALL Call 100 -97.56 13 -97.12 n/a n/a n/a
2026-02-11 2025-12-31 13F KIRBY CALL Call 4,100 10.81 452 n/a n/a n/a
2025-11-12 2025-09-30 13F KIRBY CALL Call 3,700 3,600.00 0 n/a n/a n/a
2025-08-05 2025-06-30 13F KIRBY CALL Call 100 -95.65 0 n/a n/a n/a
2025-05-12 2025-03-31 13F KIRBY CALL Call 2,300 130.00 0 n/a n/a n/a
2025-02-11 2024-12-31 13F KIRBY CALL Call 1,000 0 n/a n/a n/a
2024-07-25 2024-06-30 13F KIRBY CALL Call 0 -100.00 0 -100.00 n/a n/a n/a
2024-04-25 2024-03-31 13F KIRBY CALL Call 15,600 126.09 1 n/a n/a n/a
2024-02-02 2023-12-31 13F KIRBY CALL Call 6,900 1,050.00 1 n/a n/a n/a
2023-11-01 2023-09-30 13F KIRBY CALL Call 600 20.00 0 n/a n/a n/a
2023-08-04 2023-06-30 13F KIRBY CALL Call 500 0 n/a n/a n/a
2023-02-02 2022-12-31 13F KIRBY CALL Call 0 -100.00 0 -100.00 n/a n/a n/a
2022-11-04 2022-09-30 13F KIRBY CALL Call 1,600 1,500.00 97 1,516.67 n/a n/a n/a
2022-08-03 2022-06-30 13F KIRBY CALL Call 100 -50.00 6 -57.14 n/a n/a n/a
2022-05-02 2022-03-31 13F KIRBY CALL Call 200 0.00 14 27.27 n/a n/a n/a
2022-02-23 2021-12-31 13F/A KIRBY CALL Call 200 -93.55 11 -94.21 n/a n/a n/a
2022-02-04 2021-12-31 13F KIRBY CALL Call 3,100 190 n/a n/a n/a
2021-10-28 2021-09-30 13F KIRBY CALL Call 3,100 0.00 190 1.60 n/a n/a n/a
2021-08-12 2021-06-30 13F KIRBY CALL Call 3,100 23,746.15 187 139.74 n/a n/a n/a
2021-04-26 2021-03-31 13F KIRBY CALL Call 13 44.44 78 69.57 n/a n/a n/a
2021-02-02 2020-12-31 13F KIRBY CALL Call 9 -96.97 46 -95.72 n/a n/a n/a
2020-10-14 2020-09-30 13F KIRBY CALL Call 297 960.71 1,074 620.81 n/a n/a n/a
2020-07-13 2020-06-30 13F KIRBY CALL Call 28 -92.61 149 -90.95 n/a n/a n/a
2020-04-29 2020-03-31 13F KIRBY CALL Call 379 37,800.00 1,647 20,487.50 n/a n/a n/a
2020-02-05 2019-12-31 13F KIRBY CALL Call 1 -50.00 8 -50.00 n/a n/a n/a
2019-10-15 2019-09-30 13F KIRBY CALL Call 2 16 n/a n/a n/a
2019-07-26 2019-06-30 13F KIRBY CALL Call 0 -100.00 0 -100.00 n/a n/a n/a
2019-04-18 2019-03-31 13F KIRBY CALL Call 18 -64.00 135 -59.82 n/a n/a n/a
2019-01-16 2018-12-31 13F KIRBY CALL Call 50 -5.66 336 -22.76 n/a n/a n/a
2018-10-23 2018-09-30 13F KIRBY CALL Call 53 278.57 435 271.79 n/a n/a n/a
2018-07-30 2018-06-30 13F KIRBY CALL Call 14 180.00 117 -73.10 n/a n/a n/a
2018-04-26 2018-03-31 13F KIRBY CALL Call 5 -91.94 0 -100.00 n/a n/a n/a
2018-01-10 2017-12-31 13F KIRBY CALL Call 62 1,450.00 16 n/a n/a n/a
2017-10-25 2017-09-30 13F KIRBY CALL Call 4 -93.33 0 -100.00 n/a n/a n/a
2017-07-12 2017-06-30 13F KIRBY CALL Call 60 -65.52 15 0.00 n/a n/a n/a
2017-04-21 2017-03-31 13F KIRBY CALL Call 174 190.00 15 0.00 n/a n/a n/a
2017-01-11 2016-12-31 13F KIRBY CALL Call 0 -100.00 0 -100.00 n/a n/a n/a
2016-10-07 2016-09-30 13F KIRBY CALL Call 10 900.00 3 n/a n/a n/a
2016-07-18 2016-06-30 13F KIRBY CALL Call 1 -96.00 0 -100.00 n/a n/a n/a
2016-04-14 2016-03-31 13F KIRBY CALL Call 25 -16.67 3 200.00 n/a n/a n/a
2016-01-20 2015-12-31 13F KIRBY CALL Call 30 1 n/a n/a n/a
Disclosed Put Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share Price Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2026-02-11 2025-12-31 13F KIRBY PUT Put 0 -100.00 0 n/a n/a n/a
2025-11-12 2025-09-30 13F KIRBY PUT Put 2,200 633.33 0 n/a n/a n/a
2025-08-05 2025-06-30 13F KIRBY PUT Put 300 50.00 0 n/a n/a n/a
2025-05-12 2025-03-31 13F KIRBY PUT Put 200 0 n/a n/a n/a
2024-11-08 2024-09-30 13F KIRBY PUT Put 0 -100.00 0 n/a n/a n/a
2024-07-25 2024-06-30 13F KIRBY PUT Put 1,100 37.50 0 n/a n/a n/a
2024-04-25 2024-03-31 13F KIRBY PUT Put 800 -85.45 0 n/a n/a n/a
2024-02-02 2023-12-31 13F KIRBY PUT Put 5,500 0 n/a n/a n/a
2022-11-04 2022-09-30 13F KIRBY PUT Put 0 -100.00 0 -100.00 n/a n/a n/a
2022-08-03 2022-06-30 13F KIRBY PUT Put 1,000 60 n/a n/a n/a
2022-05-02 2022-03-31 13F KIRBY PUT Put 0 -100.00 0 -100.00 n/a n/a n/a
2022-02-23 2021-12-31 13F/A KIRBY PUT Put 75,000 10,614.29 4,456 10,262.79 n/a n/a n/a
2022-02-04 2021-12-31 13F KIRBY PUT Put 700 43 n/a n/a n/a
2021-10-28 2021-09-30 13F KIRBY PUT Put 700 0.00 43 2.38 n/a n/a n/a
2021-08-12 2021-06-30 13F KIRBY PUT Put 700 914.49 42 -89.88 n/a n/a n/a
2021-04-26 2021-03-31 13F KIRBY PUT Put 69 -53.69 415 -46.24 n/a n/a n/a
2021-02-02 2020-12-31 13F KIRBY PUT Put 149 -15.34 772 21.38 n/a n/a n/a
2020-10-14 2020-09-30 13F KIRBY PUT Put 176 -7.37 636 -37.46 n/a n/a n/a
2020-07-13 2020-06-30 13F KIRBY PUT Put 190 1,087.50 1,017 1,373.91 n/a n/a n/a
2020-04-29 2020-03-31 13F KIRBY PUT Put 16 1,500.00 69 762.50 n/a n/a n/a
2020-02-05 2019-12-31 13F KIRBY PUT Put 1 -50.00 8 -50.00 n/a n/a n/a
2019-10-15 2019-09-30 13F KIRBY PUT Put 2 -88.24 16 -88.06 n/a n/a n/a
2019-07-26 2019-06-30 13F KIRBY PUT Put 17 750.00 134 737.50 n/a n/a n/a
2019-04-18 2019-03-31 13F KIRBY PUT Put 0 -100.00 0 -100.00 n/a n/a n/a
2019-01-16 2018-12-31 13F KIRBY PUT Put 89 -66.79 599 -72.82 n/a n/a n/a
2018-10-23 2018-09-30 13F KIRBY PUT Put 268 252.63 2,204 247.09 n/a n/a n/a
2018-07-30 2018-06-30 13F KIRBY PUT Put 76 1,166.67 635 -71.19 n/a n/a n/a
2018-04-26 2018-03-31 13F KIRBY PUT Put 6 -14.29 0 -100.00 n/a n/a n/a
2018-01-10 2017-12-31 13F KIRBY PUT Put 7 16.67 1 n/a n/a n/a
2017-10-25 2017-09-30 13F KIRBY PUT Put 0 -100.00 0 -100.00 n/a n/a n/a
2017-07-12 2017-06-30 13F KIRBY PUT Put 49 25.64 4 -60.00 n/a n/a n/a
2017-04-21 2017-03-31 13F KIRBY PUT Put 39 -95.93 10 233.33 n/a n/a n/a
2017-01-11 2016-12-31 13F KIRBY PUT Put 958 13,585.71 3 n/a n/a n/a
2016-10-07 2016-09-30 13F KIRBY PUT Put 7 -96.02 0 -100.00 n/a n/a n/a
2016-07-18 2016-06-30 13F KIRBY PUT Put 176 506.90 4 33.33 n/a n/a n/a
2016-04-14 2016-03-31 13F KIRBY PUT Put 29 -21.62 3 -50.00 n/a n/a n/a
2016-01-20 2015-12-31 13F KIRBY PUT Put 37 27.59 6 100.00 n/a n/a n/a
2015-10-08 2015-09-30 13F KIRBY PUT Put 0 -100.00 0 -100.00 n/a n/a n/a
2015-07-08 2015-06-30 13F KIRBY PUT Put 6 -14.29 1 0.00 n/a n/a n/a
2015-04-21 2015-03-31 13F KIRBY PUT Put 7 75.00 1 -75.00 n/a n/a n/a
2015-03-04 2014-12-31 13F KIRBY PUT Put 4 4 n/a n/a n/a
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.