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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
1636921	H. John Longmaid	1001 Fannin Street, Suite 2020 Houston TX 77002		No	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	2015-11-12	20,000	$13.74	1,047,347	No	4	P	Indirect	By The Longmaid Family Trust

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	P	Indirect	By The Longmaid Family Trust

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Common Units Representing Limited Partner Interests	353,652	Indirect	By John H. Longmaid 1965 Trust
Common Units Representing Limited Partner Interests	219,479	Indirect	By John H. Longmaid 1968 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 $13.34 to $14.11, 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.
In a previous transaction that was not reportable on Form 4, Mr. Longmaid transferred 5,263 common units owned directly to the Longmaid Family Trust.