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Schedule of Investments | 12 Months Ended
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Dec. 31, 2011
Schedule of Investments | United States 12 Month Natural Gas Fund, LP Schedule of Investments At December 31, 2011
|  | Number of Contracts |  |  | Unrealized Loss on Open Commodity Contracts |  |  | % of Partners’ Capital |
Open Futures Contracts - Long |  |  |  |  |  |  |  |  |  |  |  |
United States Contracts |  |  |  |  |  |  |  |  |  |  |  |
NYMEX Natural Gas Futures NG February 2012 contracts, expiring January 2012 |  |  | 53 |  |  | $ | (1,134,840 | ) |  |  | (5.35 | )
NYMEX Natural Gas Futures NG March 2012 contracts, expiring February 2012 |  |  | 54 |  |  |  | (992,530 | ) |  |  | (4.68 | )
NYMEX Natural Gas Futures NG April 2012 contracts, expiring March 2012 |  |  | 54 |  |  |  | (902,990 | ) |  |  | (4.26 | )
NYMEX Natural Gas Futures NG May 2012 contracts, expiring April 2012 |  |  | 54 |  |  |  | (882,660 | ) |  |  | (4.16 | )
NYMEX Natural Gas Futures NG June 2012 contracts, expiring May 2012 |  |  | 53 |  |  |  | (835,310 | ) |  |  | (3.94 | )
NYMEX Natural Gas Futures NG July 2012 contracts, expiring June 2012 |  |  | 53 |  |  |  | (890,120 | ) |  |  | (4.20 | )
NYMEX Natural Gas Futures NG August 2012 contracts, expiring July 2012 |  |  | 54 |  |  |  | (839,470 | ) |  |  | (3.96 | )
NYMEX Natural Gas Futures NG September 2012 contracts, expiring August 2012 |  |  | 54 |  |  |  | (693,560 | ) |  |  | (3.27 | )
NYMEX Natural Gas Futures NG October 2012 contracts, expiring September 2012 |  |  | 54 |  |  |  | (662,680 | ) |  |  | (3.12 | )
NYMEX Natural Gas Futures NG November 2012 contracts, expiring October 2012 |  |  | 53 |  |  |  | (426,230 | ) |  |  | (2.01 | )
NYMEX Natural Gas Futures NG December 2012 contracts, expiring November 2012 |  |  | 53 |  |  |  | (250,390 | ) |  |  | (1.18 | )
NYMEX Natural Gas Futures NG January 2013 contracts, expiring December 2012 |  |  | 53 |  |  |  | (72,540 | ) |  |  | (0.34 | )
Total Open Futures Contracts |  |  | 642 |  |  | $ | (8,583,320 | ) |  |  | (40.47 | )
|  |  | Principal Amount |  |  |  | Market Value |  |  |  |  |
Cash Equivalents |  |  |  |  |  |  |  |  |  |  |  |
United States Treasury Obligation |  |  |  |  |  |  |  |  |  |  |  |
U.S. Treasury Bill, 0.03%, 6/21/2012 |  | $ | 1,760,000 |  |  | $ | 1,759,748 |  |  |  | 8.30 |
United States - Money Market Funds |  |  |  |  |  |  |  |  |  |  |  |
Fidelity Institutional Government Portfolio - Class I |  |  | 2,508,863 |  |  |  | 2,508,863 |  |  |  | 11.83 |
Goldman Sachs Financial Square Funds - Government Fund - Class SL |  |  | 1,501,985 |  |  |  | 1,501,985 |  |  |  | 7.08 |
Morgan Stanley Institutional Liquidity Fund - Government Portfolio |  |  | 6,507,773 |  |  |  | 6,507,773 |  |  |  | 30.68 |
Total Money Market Funds |  |  |  |  |  |  | 10,518,621 |  |  |  | 49.59 |
Total Cash Equivalents |  |  |  |  |  | $ | 12,278,369 |  |  |  | 57.89 |
See accompanying notes to financial statements. United States 12 Month Natural Gas Fund, LP Schedule of Investments At December 31, 2010
|  | Number of Contracts |  |  | Unrealized Gain (Loss) on Open Commodity Contracts |  |  | % of Partners’ Capital |
Open Futures Contracts - Long |  |  |  |  |  |  |  |  |  |  |  |
United States Contracts |  |  |  |  |  |  |  |  |  |  |  |
NYMEX Natural Gas Futures NG February 2011 contracts, expiring January 2011 |  |  | 63 |  |  | $ | (481,780 | ) |  |  | (1.38 | )
NYMEX Natural Gas Futures NG March 2011 contracts, expiring February 2011 |  |  | 63 |  |  |  | (369,360 | ) |  |  | (1.05 | )
NYMEX Natural Gas Futures NG April 2011 contracts, expiring March 2011 |  |  | 63 |  |  |  | (245,660 | ) |  |  | (0.70 | )
NYMEX Natural Gas Futures NG May 2011 contracts, expiring April 2011 |  |  | 63 |  |  |  | (239,620 | ) |  |  | (0.68 | )
NYMEX Natural Gas Futures NG June 2011 contracts, expiring May 2011 |  |  | 63 |  |  |  | (321,180 | ) |  |  | (0.92 | )
NYMEX Natural Gas Futures NG July 2011 contracts, expiring June 2011 |  |  | 63 |  |  |  | (271,080 | ) |  |  | (0.77 | )
NYMEX Natural Gas Futures NG August 2011 contracts, expiring July 2011 |  |  | 63 |  |  |  | (178,230 | ) |  |  | (0.51 | )
NYMEX Natural Gas Futures NG September 2011 contracts, expiring August 2011 |  |  | 63 |  |  |  | (139,530 | ) |  |  | (0.40 | )
NYMEX Natural Gas Futures NG October 2011 contracts, expiring September 2011 |  |  | 63 |  |  |  | (80,810 | ) |  |  | (0.23 | )
NYMEX Natural Gas Futures NG November 2011 contracts, expiring October 2011 |  |  | 63 |  |  |  | 19,150 |  |  |  | 0.05 |
NYMEX Natural Gas Futures NG December 2011 contracts, expiring November 2011 |  |  | 63 |  |  |  | 67,480 |  |  |  | 0.19 |
NYMEX Natural Gas Futures NG January 2012 contracts, expiring December 2011 |  |  | 63 |  |  |  | 65,560 |  |  |  | 0.19 |
Total Open Futures Contracts |  |  | 756 |  |  | $ | (2,175,060 | ) |  |  | (6.21 | )
|  |  | Principal Amount |  |  |  | Market Value |  |  |  |  |
Cash Equivalents |  |  |  |  |  |  |  |  |  |  |  |
United States - Money Market Funds |  |  |  |  |  |  |  |  |  |  |  |
Fidelity Institutional Government Portfolio - Class I |  | $ | 11,507,524 |  |  | $ | 11,507,524 |  |  |  | 32.86 |
Goldman Sachs Financial Square Funds - Government Fund - Class SL |  |  | 2,501,682 |  |  |  | 2,501,682 |  |  |  | 7.14 |
Morgan Stanley Institutional Liquidity Fund - Government Portfolio |  |  | 14,004,429 |  |  |  | 14,004,429 |  |  |  | 39.99 |
Total Cash Equivalents |  |  |  |  |  | $ | 28,013,635 |  |  |  | 79.99 |

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- Definition The entire disclosure for the information required in the supplementary schedule applicable to management investment companies summarizing the listing of holdings of unaffiliated investments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 320 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-12C) -URI http://asc.fasb.org/extlink&oid=6955306&loc=d3e611225-123010 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 12C -Article 12 + Details
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