Midstates Petroleum Company

On April 25, 2012, Midstates Petroleum Company (''Midstates'') completed its initial public offering of 27,600,000 common shares at a price of $13.00 per share. The common stock began trading on the New York Stock Exchange on April 20, 2012 under the ticker ''MPO.''

Midstates Petroleum Company, Inc. is an independent exploration and production company focused on the application of modern drilling and completion techniques to oil-prone resources in previously discovered yet underdeveloped hydrocarbon trends. Founded in 1993, the Company's operations are currently focused on oilfields in the Upper Gulf Coast Tertiary trend onshore in central Louisiana. The Company had proved reserves of 26.2 MMBoe as of 12/31/11, with Q4 2011 net production of 9.4 MBoe/d. Midstates is headquartered in Houston, Texas.

Simmons & Company served as a Co-manager for this initial public offering.

OCEAN RIG UDW INC

On April 17, 2012, Ocean Rig UDW Inc. ("Ocean Rig") (NASDAQ: ORIG), announced that it had completed its public offering of 11,500,000 common shares at a price of $16.25 per share with DryShips Inc. (NASDAQ: DRYS) as the selling shareholder.

Ocean Rig is an international offshore drilling contractor providing oilfield services for offshore oil and gas exploration and development and production drilling and specializes in the ultra-deepwater and harsh-environment segment of the offshore drilling industry. Ocean Rig was founded in 1996 and is headquartered in Nicosia, Cyprus.

Simmons & Company served as a Co-manager for this public offering.

Forum Energy Technologies, Inc.

On April 17, 2012, Forum Energy Technologies, Inc. (''Forum'') announced that it had completed its initial public offering of 21,789,470 common shares at a price of $20.00 per share. The common stock began trading on the New York Stock Exchange on April 12, 2012 under the ticker "FET."

Forum provides manufactured technologies and applied products to the energy industry. Forum manufactures and provides products and related services to the drilling and intervention sectors, as well as to the subsea services and construction sectors.

Simmons & Company served as a Co-manager for this initial public offering.

Patterson-UTI Energy

Patterson-UTI Energy, Inc. (''Patterson'', NASDAQ: PTEN) has sold its flowback operations to TETRA Technologies, Inc. (''TETRA'', NYSE: TTI) in a cash transaction. The sale price was $42.5 million and a subsidiary of Patterson retained the associated financial working capital of approximately $5 million. Patterson's flowback operations serve oil and gas operators in Appalachia and the U.S. Rockies from offices located in Pennsylvania, West Virginia and Colorado.

Patterson provides onshore contract drilling and pressure pumping services to exploration and production companies in North America. Patterson has approximately 330 marketable land-based drilling rigs and operates primarily in the oil and natural gas producing regions of Texas, New Mexico, Oklahoma, Arkansas, Louisiana, Mississippi, Colorado, Utah, Wyoming, Montana, North Dakota, Pennsylvania, West Virginia, Ohio and western Canada. Patterson also provides pressure pumping services primarily in Texas and the Appalachian region.

TETRA is a geographically diversified oil and gas services company focused on completion fluids and other products, after-frac flowback and production well testing, wellhead compression, and selected offshore services including well plugging and abandonment, decommissioning, and diving.

Simmons & Company International served as financial advisor to Patterson in the transaction.

Superior Energy Services, Inc.

On March 30, 2012, Superior Energy Services, Inc. (''Superior'', NYSE: SPN) closed the previously announced sale of its 18 liftboats that comprise its Marine Services Segment to a subsidiary of SEACOR Holdings Inc. (''SEACOR'', NYSE: CKH) for $134 million plus working capital.

Superior's liftboats support a broad range of well intervention, maintenance, decommissioning and construction services for offshore crude oil and natural gas production. All of the liftboats are currently located in the U.S. Gulf of Mexico.

Superior serves the drilling, completion and production-related needs of oil and gas companies worldwide through its brand name rental tools and its integrated completion and well intervention services and tools, supported by an engineering staff who plan and design solutions for customers.

SEACOR operates a fleet of offshore marine support vessels serving the offshore oil and gas exploration and production industry worldwide.

Simmons & Company International served as exclusive financial advisor to Superior Energy Services, Inc.

Associated Asphalt Partners, LLC

On March 9, 2012, ArcLight Capital Partners, LLC (''ArcLight'') completed the sale of Associated Asphalt Partners, LLC (''Associated Asphalt'') to GS Capital Partners (''GSCP'').

Associated Asphalt is one of the largest independent asphalt suppliers in the U.S. Headquartered in Roanoke, Virginia, Associated Asphalt owns and operates ten terminal and storage facilities throughout the Southeast and Mid-Atlantic. The company sells liquid asphalt primarily to paving contractors for road and highway construction and maintenance. Prior to the transaction, Associated Asphalt was owned by ArcLight and Associated Asphalt management.

ArcLight is an energy-focused private equity investment firm, having invested over $9 billion of capital since its inception over a decade ago. ArcLight has successfully sourced, managed and realized investments through multiple energy industry cycles. Headquartered in Boston, Massachusetts, the firm's investment team has extensive energy expertise, investing experience, industry relationships and specialized asset level value creation capabilities.

Since 1986, the Goldman Sachs Merchant Banking Division and its predecessor business areas have raised 16 private equity and principal debt investment funds aggregating over $82 billion of capital (including leverage). A global leader in private corporate equity investing, the GS Capital Partners family of funds focuses on large, high quality companies with strong management and funding acquisition or expansion across a range of industries and geographies.

Simmons & Company International served as financial advisor to Associated Asphalt in this transaction.

Phoenix Equity Partners

On March 13, 2012, Phoenix Equity Partners (''Phoenix'') acquired Gall Thomson Environmental (''GTE''). GTE is the global market leader in the supply of marine breakaway couplings, which are safety-critical valves used in hose transfer systems, primarily in the offshore oil and gas market, and other industrial applications. GTE comprises of two divisions: Gall Thomson, which focuses on larger bore oil and gas products; and KLAW, which supplies smaller bore products for the marine and industrial markets, as well as emergency release coupling systems for ship-to-ship transfer of LNG.

Founded in 2001, Phoenix Equity Partners is a leading private equity firm with offices in London, Manchester and Yorkshire whose investment focus is on mid-market UK private businesses valued at up to £200 million.

The investment will support the management team in developing and growing the business. The business is already active in 35 countries and significant investment will be made in infrastructure and personnel to facilitate the next phase of the business' development.

Simmons & Company International Limited served as corporate finance advisor to Phoenix Equity Partners.

T H Hill

On March 30, 2012, Bureau Veritas closed its acquisition of TH Hill, a worldwide leader in oil & gas drilling failure prevention and analysis services.

Founded in 1980 and headquartered in Houston, Texas, T H Hill offers quality assurance, engineering and training services to minimize the risk of structural and mechanical failure of both onshore and offshore drilling equipment. T H Hill also develops unique standards including DS-1®, a global standard for drill string design, manufacture, operation and inspection and STC-1 for the certification of drilling specialty tools. T H Hill operates in more than 50 countries and has offices in Canada and Brazil. It has over 250 employees and reported gross revenue of around €36 million (US$47 million) in 2011.

Bureau Veritas is a world leader in conformity assessment and certification services. Bureau Veritas helps its clients to improve their performances by offering services and innovative solutions in order to ensure that their assets, products, infrastructure and processes meet standards and regulations in terms of quality, health and safety, environmental protection and social responsibility. Founded in 1828, Bureau Veritas is headquartered in Neuilly sur Seine, France. Following this acquisition, Bureau Veritas will have 3,300 employees in the United States.

Simmons & Company International served as exclusive financial advisor to T H Hill.

Stone Energy Corporation

On March 1, 2012, Stone Energy Corporation (''Stone Energy'' or the ''Company'') announced that it had priced its $275 million Convertible Notes offering. The Convertible Notes will pay interest semiannually at a rate of 1.75% and will be convertible into cash, shares of the Company's common stock or a combination of cash and shares of the Company's common stock, at the Company's election, based on the applicable conversion rate at such time. The Convertible Notes have an initial conversion rate of 23.4449 shares of the Company's common stock per $1,000 principal amount of the Convertible Notes (which is equal to an initial conversion price of approximately $42.65 per share of the Company's common stock), representing an initial conversion premium of approximately 33.5% above the closing price of $31.95 per share of the Company's common stock on February 29, 2012. The Convertible Notes will mature on March 1, 2017, unless repurchased or converted in accordance with their terms prior to such date. Stone Energy expects to apply the approximately $239 million of net proceeds, after related hedge and warrant transactions, for general corporate purposes, which may include providing longer term financing for the recently closed Pompano, Wideberth and Appalachian acquisitions and the repayment of outstanding borrowings under the Company's bank credit facility.

Stone Energy Corporation is an independent oil and natural gas exploration and production company headquartered in Lafayette, Louisiana, with additional offices in New Orleans, Louisiana, Houston, Texas and Morgantown, West Virginia.

Simmons & Company International served as a Co-manager to Stone Energy with respect to this debt offering.

TETRA Technologies, Inc.

On March 9, 2012, TETRA Technologies, Inc. (''TETRA'') (NYSE: TTI) announced that its TETRA Investments Company U.K. Limited subsidiary had acquired Optima Solutions Holdings Limited (''Optima'') for GBP 40 million.

TETRA is a geographically diversified oil and gas services company focused on completion fluids, after-frac flow back and production well testing, wellhead compression and selected offshore services including well plugging and abandonment, decommissioning and diving.

Optima is a provider of rig cooling services and associated products, which suppress heat generated by high rate flaring of hydrocarbons during offshore well test operations. Established in 1999, Optima has grown to serve a diversified customer base in over 40 global locations from operational bases in Aberdeen, U.K. and Perth, Australia.

The acquisition of Optima is a complement to TETRA's energy services business and fits its strategic goal of offering customers a broader package of capabilities. With the addition of rig cooling, TETRA is increasing its presence in a number of markets, globally.

Simmons & Company International Limited served as corporate finance advisor to TETRA Technologies, Inc. in its acquisition of Optima Solutions Holdings Limited.

Exterran Partners, L.P.

Exterran Partners, L.P. (''Exterran Partners'', NASDAQ: EXLP) completed the acquisition of certain compression and gas processing assets from Exterran Holdings, Inc. (''Exterran Holdings'', NYSE: EXH) for consideration valued at approximately $184 million. The assets include 400 compressor units with approximately 188,000 horsepower of compression serving 40 contracted customers and a natural gas processing plant with a capacity of 10 million cubic feet per day. In addition, the acquisition includes approximately 140 compressor units comprising approximately 75,000 horsepower currently being leased from Exterran Holdings to Exterran Partners.

Exterran Partners is a midstream master limited partnership that provides natural gas contract operations services to customers throughout the United States. Exterran Holdings owns an equity interest in Exterran Partners, including all of the general partner interest.

Exterran is a global leader in full-service natural gas compression and a premier provider of services and equipment for oil & gas production, processing, treating, transportation and storage. Headquartered in Houston, Texas, Exterran Holdings has approximately 10,000 employees and operates in approximately 30 countries.

Simmons & Company International served as financial advisor to the Conflicts Committee of Exterran Partners, L.P.

DCP Midstream Partners, L.P.

On April 4, 2012, DCP Midstream Partners, LP (''DCP Partners'', NYSE: DPM) closed on its acquisition of the remaining 66.7% interest in the DCP Southeast Texas joint venture from DCP Midstream, LLC (''DCP Midstream'') for approximately $240 million. The joint venture is a fully integrated midstream business and consists of natural gas pipeline, processing and storage assets. DCP Partners previously acquired a 33.3% interest in the joint venture in January 2011.

DCP Partners, a midstream master limited partnership, was formed by DCP Midstream to own, operate, acquire and develop midstream energy assets. DCP Partners is a leading natural gas liquids (''NGL'') producer, gas gatherer and processor and wholesale distributor of propane.

DCP Midstream is one of the largest natural gas gatherers and processors and also operates the largest NGL production and marketing business in the U.S. DCP Midstream is a joint venture between Spectra Energy and ConocoPhillips. DCP Midstream owns and operates the General Partner of DCP Partners.

Simmons & Company International served as financial advisor to the Special Committee of DCP Midstream GP, LLC.

Zenith Oilfield Technology Ltd.

Based in Aberdeen, Zenith is an international provider of innovative technology and products for the monitoring and analysis of downhole data and related completion products for the oilfield artificial lift market. The company was founded in 2004 and serves a diversified customer base, including independent and national oil companies in approximately 30 countries.

Lufkin Industries, Inc. sells and services oilfield pumping units, well automation systems, gas lift and plunger lift systems, progressing cavity pumps, well completion products, foundry castings and power transmission products throughout the world. Lufkin has vertically integrated all vital technologies required to design, manufacture and market its products.

The acquisition of Zenith is a strong complement to Lufkin's fast-growing automation business and accelerates their strategic goal of offering customers a fully-integrated solutions package of well automation capabilities to enhance the effectiveness of their artificial lift products.

Simmons & Company International Limited served as exclusive financial advisor to Zenith Oilfield Technology LTD.

Ceres, Inc.

On February 22, 2012, Ceres, Inc. (''Ceres'') announced that it completed its initial public offering of 5,750,000 common shares at a price to the public of $13.00 per share. The common stock began trading on the NASDAQ Global Market on February 22, 2012 under the ticker ''CERE.''

Ceres is an agricultural biotechnology company that markets seeds for energy crops used in the production of renewable transportation fuels, electricity and bio-based products. Its development activities include sweet sorghum, high-biomass sorghum, switchgrass and miscanthus.

Simmons & Company served as Co-manager for this initial public offering.

OYO Geospace Corporation

OYO Geospace Corporation (NASDAQ: OYOG) (''OYO Geospace'') announced on February 22, 2012 that it has closed its underwritten public offering of 1,290,950 shares of its common stock owned by OYO Corporation U.S.A. at a price to the public of $95.00 per share. The offering amounts to total gross proceeds of approximately $122,640,250 before underwriting discounts, commissions and offering expenses.

OYO Geospace designs and manufactures instruments and equipment used by the oil and gas industry in the acquisition and processing of seismic data as well as in reservoir characterization and monitoring activities. The company also designs and manufactures equipment and film for the thermal printing industry worldwide.

Simmons & Company served as Co-manager for this public equity offering.