13F-HR 1 file13f33111.txt UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 13F FORM 13F COVER PAGE Report for the Calendar Year or Quarter Ended: March 31, 2011 Check here if Amendment [ ]; Amendment Number: This Amendment (check only one.): [ ] is a restatement. [ ] adds new holdings entries. Institutional Investment Manager Filing this Report: Name: Peter K. Seldin Address: 575 Lexington Avenue, 33rd Floor New York, NY 10022 Form 13F File Number: 28-3604 The institutional investment manager filing this report and the person by whom it is signed hereby represent that the person signing the report is authorized to submit it, that all information contained herein is true, correct and complete, and that it is understood that all required items, statements, schedules, lists and tables, are considered integral parts of this form. Person signing this report on Behalf of Reporting Manager: Name: Peter K. Seldin Title: Investment Manager Phone: 212-753-5150 Signature, Place, and Date of Signing: /s/Peter K. Seldin New York, NY May 13, 2011 Report type (Check only one): [X] 13F Holdings Report. [ ] 13F Notice. [ ] 13F Combination Report. FORM 13F SUMMARY PAGE Report Summary: Number of Other Included Managers: 3 Form 13F Information Table Entry Total: 15 Form 13F Information Table Value Total: $135,506 (thousands) List of Other Included Managers: Provide a numbered list of the name(s) and Form 13F file number(s) of all Institutional investment managers with respect to which this report is filed, other than the manager filing this report. No. Form 13F File Number Name 1. 028-12601 Centennial Energy Partners, L.L.C. 2. 028-12603 Centennial Energy Partners, L.P. 3. 028-12606 Centennial Energy Partners V, L.P. FORM 13F INFORMATION TABLE

COLUMN 1 COLUMN 2 COLUMN 3 COLUMN 4 COLUMN 5 COLUMN 6 COLUMN 7 COLUMN 8 TITLE OF VALUE SHARES INVESTMENT OTHER VOTING AUTHORITY NAME OF ISSUER CLASS CUSIP (X $1000) PRN/AMT DISCRETION MANAGERS SOLE SHARED ATP OIL & GAS COM 00208J108 ~~19279~~22758 1,~~151~~256,645 SHARED-DEFINED 1,2 1,~~151~~256,645 0 ATP OIL & GAS COM 00208J108 ~~25155~~9973 1550,~~502,~~677 SHARED-DEFINED 1,3 1550,~~502,~~677 0 ATP OIL & GAS COM 00208J108 3260 180,000 SHARED-DEFINED 180,000 0 BPZ RESOURCES INC COM 055639108 ~~23077~~25775 4,~~848~~863,209 SHARED-DEFINED 1,2 4,~~848~~863,209 0 BPZ RESOURCES INC COM 055639108 ~~30821~~9693 61,~~475~~828,~~054~~824 SHARED-DEFINED 1,3 61,~~475~~828,~~054~~824 0 BPZ RESOURCES INC COM 055639108 2942 555,000 SHARED-DEFINED 555,000 0 CARRIZO OIL & GAS INC COM 144577103 ~~22039~~20828 ~~638~~563,988 SHARED-DEFINED 1,2 ~~638~~563,988 0 CARRIZO OIL & GAS INC COM 144577103 ~~34881~~8321 1225,~~011,~~331 SHARED-DEFINED 1,3 1225,~~011,~~331 0 ~~COMPTON~~CARRIZO ~~PETE~~OIL ~~CORP.~~& GAS INC COM ~~204940100~~144577103 ~~7108~~2770 1675,~~157,147~~000 SHARED-DEFINED 175,2000 ~~16,157,147~~ 0 ~~COMPTON~~RANGE ~~PETE~~RES CORP. COM ~~204940100~~75281A109 ~~4286~~9698 9165,~~743,513~~894 SHARED-DEFINED 1,32 9165,~~743,513~~894 0 RANGE RES CORP COM 75281A109 ~~9036~~3946 ~~200~~67,~~894~~506 SHARED-DEFINED 1,23 ~~200~~67,~~894~~506 0 RANGE RES CORP COM 75281A109 ~~14911~~292 ~~331~~5,~~506~~000 SHARED-DEFINED 15,3000 ~~331,506~~ 0 VENOCO INC COM 92275P307 ~~8653~~9485 ~~469~~555,000 SHARED-DEFINED 1,2 ~~469~~555,000 0 VENOCO INC COM 92275P307 ~~12164~~4381 ~~659~~256,321 SHARED-DEFINED 1,3 ~~659~~256,321 0 VENOCO INC COM 92275P307 1384 81,000 SHARED-DEFINED 81,000 0

Filing Compare · SELDIN PETER K