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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
56047	Kirby Corp	KEX	Water Transportation (4400)	741884980

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1097491	Berdon Charles Lawrence	55 Waugh Drive Houston TX 77007		Yes	No	No	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Stock, Par Value $.10 Per Share	Acquisiton	2010-05-12	48,000	$35.66	684,341	No	4	M	Direct
Common Stock, Par Value $.10 Per Share	Acquisiton	2010-05-12	54,219	$23.98	738,560	No	4	M	Direct
Common Stock, Par Value $.10 Per Share	Disposition	2010-05-13	2,455	$41.78	57,957	No	4	S	Indirect	Partnership
Common Stock, Par Value $.10 Per Share	Disposition	2010-05-13	8,345	$41.78	280,370	No	4	S	Indirect	Trusts

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	M	Direct
No	4	M	Direct
No	4	S	Indirect	Partnership
No	4	S	Indirect	Trusts

Reported Derivative Transactions

Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common Stock	Employee Stock Option (Right to Buy)	Disposition	2010-05-12	48,000	$35.66	48,000	$35.66
Common Stock	Employee Stock Option (Right to Buy)	Disposition	2010-05-12	54,219	$23.98	54,219	$23.98

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
0	2010-01-26	2010-05-27	No	4	M	Direct
0	2010-03-30	2010-05-27	No	4	M	Direct

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Common Stock, Par Value $.10 Per Share	10,024	Indirect	401K Plan

Footnotes

The reported price is the weighted average sales price. The sales were made at prices ranging from $41.75 to $41.92 per share. The reporting person will provide, upon request by the Commission staff, the issuer or a stockholder of the issuer, full information regarding the number of shares sold at each separate price.
The reported shares are held by Lawrence Family Interests, LP, a limited partnership of which entities wholly owned by Mr. Lawrence and his wife are the general partners and of which Mr. Lawrence's children and trusts for their benefit are the limited partners. Mr. Lawrence disclaims beneficial ownership of the shares owned by the limited partnership except to the extent of his pecuniary interest in such shares.
These shares are owned by trusts for the benefit of members of Mr. Lawrence's family. Mr. Lawrence is not a beneficiary of the trusts, but under their terms, he has the right to acquire the property in the trusts, including the Kirby shares owned by the trusts, by substituting property of equal value.