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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1621434	Black Stone Minerals L.p.	BSM	Crude Petroleum & Natural Gas (1311)	471846692

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1640004	N. William Mathis	1001 Fannin Street, Suite 2020 Houston TX 77002		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 Units Representing Limited Partner Interests	Acquisiton	2016-03-10	3,979	$13.50	592,918	No	4	P	Indirect	By WM Capital Partners, L.P.

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	P	Indirect	By WM Capital Partners, L.P.

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Common Units Representing Limited Partner Interests	242,714	Indirect	By Conti Street Minerals, L.P.
Common Units Representing Limited Partner Interests	77,459	Indirect	By Conti Street Partners, L.P.
Common Units Representing Limited Partner Interests	41,538	Direct
Common Units Representing Limited Partner Interests	189,117	Indirect	By The Estate of Isabel Brown Wilson
Common Units Representing Limited Partner Interests	101,755	Indirect	By Travis A. Mathis Special Trust

Footnotes

The price reported in Column 4 is a weighted average price. These common units were purchased in multiple transactions at prices ranging from $13.40 to $13.52, inclusive. The reporting person undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of common units purchased at each separate price within the ranges set forth in this footnote.