Exhibit 99.1

PRIMORIS SERVICES CORPORATION ANNOUNCES 2013 FOURTH QUARTER AND FULL YEAR FINANCIAL RESULTS

Board of Directors Declares $0.035 Per Share Cash Dividend and Authorizes $23 Million Share Repurchase Plan

Financial Highlights

·                  Q4 2013 revenues increased by 12% to $538 million from the fourth quarter of 2012

·                  Q4 2013 net income attributable to Primoris increased by 32% to a record $22.5 million, or $0.44 per diluted share, compared to Q4 2012 net income attributable to Primoris of $17.0 million, or $0.33 per diluted share

·                  2013 revenues increased by 26% from 2012 to a record $1.94 billion

·                  2013 net income attributable to Primoris increased by 23% to a record $69.7 million, or $1.35 per diluted share, compared to net income attributable to Primoris of $56.8 million, or $1.10 per diluted share, in 2012

·                  At December 31, 2013:

·            A record total of $214.8 million in cash, cash equivalents, and short-term investments, an increase of 33% over December 31, 2012

·            A record total backlog of $1.94 billion

Dallas, TX — February 28, 2014— Primoris Services Corporation (NASDAQ GS: PRIM) (“Primoris” or “Company”) today announced financial results for its fourth quarter and year ended December 31, 2013.

The Company also announced that on February 26, 2014 its Board of Directors declared a $0.035 per share cash dividend to stockholders of record on March 31, 2014, payable on or about April 15, 2014.  The Company’s Board of Directors also authorized a share repurchase program of up to $23 million through December 31, 2014.

Brian Pratt, Chairman, President and Chief Executive Officer of Primoris, commented, “The fourth quarter of 2013 was a strong closing to an outstanding year for Primoris.  We continued to grow revenues, and the full year revenues of $1.9 billion represent a 26% increase over 2012’s revenues.  Our improved margins resulted in the highest quarterly and full-year earnings in the Company’s history.  We achieved these impressive results while strengthening our balance sheet, ending the year with well over $200 million in cash and short-term investments and a tangible net worth of $233 million.”

Mr. Pratt continued, “Primoris’ backlog at December 31, 2013 was $1,943 million, which is an all-time high for us and represents the substantial opportunities available to us in the next several years.  The nation-wide demand for energy and petrochemical infrastructure is driving our business, and these end-markets continue to exhibit vigorous growth, even with the recent spike in natural gas prices and a tight labor market.  Primoris continues to be focused on building a strong, sustainable company that will take advantage of these near-term opportunities without sacrificing our stakeholders’ long term values and interests.”

Mr. Pratt concluded, “The share repurchase plan adopted by our Board of Directors reflects the continued confidence in our business, as well as our dedicated focus on continuing to create value for our stockholders.”

2013 FOURTH QUARTER RESULTS OVERVIEW

Revenues for the 2013 fourth quarter increased 12% to $537.9 million from $480.9 million for the same period in 2012.  The increased revenues are largely due to increased underground work in the West Construction Services segment, including a full quarter of results for Q3C.  Gross profit for the 2013 fourth quarter rose by 36.7% to $74.9 million, or 13.9% of revenues, from $54.8 million, or 11.4% of revenues, in the 2012 fourth quarter.  The increase in gross margin can be attributed primarily to the close-out of a major power plant project in the West Construction Services segment, the acquisition of Q3C, and the improved margins for industrial work in the East Construction Services Segment.

SEGMENT RESULTS

·              East Construction Services — The East Construction Services segment consists of businesses located primarily in the southeastern United States and along the Gulf Coast.  Included in this segment are the operations of JCG’s Heavy Civil, Industrial and Infrastructure & Maintenance divisions; Cardinal Contractor’s  water and wastewater construction activities;  and the services provided by the 2012 and 2013 acquisitions (Sprint, Silva, Saxon, and FSSI).

·              West Construction Services — The West Construction Services segment consists of businesses located primarily in the western United States.  The segment primarily includes the underground and industrial operations of ARB, Inc., the operations of Rockford (which performs its major capital underground work throughout the United States), the operations of ARB Structures, the 2012 acquisition of Q3 Contracting, Inc., and Primoris Renewables, Inc.  The segment also includes the operations of the Blythe Power Constructors joint venture.

·              Engineering — The Engineering segment includes the results of OnQuest, Inc. and OnQuest Canada, ULC.

Segment Revenues

(in thousands, except %)

Segment Gross Profit

(in thousands, except %)

East Construction Services:  Revenues were flat in the 2013 fourth quarter, as increased revenues at James and Cardinal Contractors were offset by declines at Sprint.  The increased James revenue was largely the result of escalating work on the Belton, TX area projects and Gulf Coast industrial projects.  The declines in Sprint revenue can be attributed to the delayed start on a large pipeline project.  Gross profit for the 2013 fourth quarter declined by $1.1 million to $15.2 million, or 7.5% of revenues.  The decline in gross margin as a percentage of revenues is due primarily to the lower margins associated with the start-up phase of heavy civil projects and increased weather-related costs for LADOT projects.

West Construction Services:  Revenues increased by $57.7 million in the 2013 fourth quarter, due primarily to increased pipeline work at Rockford and a full quarter of contribution from Q3 Contracting, which was acquired on November 17, 2012, while slightly offset by lower revenue in our California-based underground business.  Rockford revenue increased by $60.5 million, as crews worked through the fourth quarter on a large project in central Texas.  Q3C contributed an additional $37.1 million to the revenue increase.  ARB Underground revenue declined by $30.3 million, primarily due to decreased spending by a large gas and utility customer.  Gross profit for the 2013 fourth quarter increased by $22.5 million, which is mainly attributed to the substantial completion of a large California power plant by the ARB Industrial division.  This gross profit as a percentage of revenues is higher than historical percentages, and we expect that it will return to more historical levels in 2014.

Engineering: Revenues decreased by $1.1 million, and gross profit decreased by $1.3 million as we completed a major project in Australia.

Selling, general and administrative expenses (“SG&A”) were $34.1 million, or 6.3% of revenues for the 2013 fourth quarter, compared to $26.7 million, or 5.6% of revenues for the 2012 fourth quarter.  The increased SG&A included a $0.7 million impairment charge in Q3C’s Alvah basis difference, as a result of the 51% owner planning to exercise a net asset buy-out option of our 49% interest.  A management change at FSSI also contributed $1.7 million to the increased SG&A, from the impairment of an intangible asset for customer relationships and the unamortized portion of a prepaid employment contract.  The remaining increase in SG&A can be attributed to increased compensation and compensation-related expenses.

Operating income for the 2013 fourth quarter was $40.8 million, or 7.6% of total revenues, compared to $28.1 million, or 5.8% of total revenues, for the same period last year.

Non-operating items in the 2013 fourth quarter were a loss of $0.6 million, compared to a $1.2 million loss in the 2012 fourth quarter.  Included in the 2013 items is a $4.9 million impairment charge for the WesPac energy joint venture and a $0.6 million increase in the fair value of the liability for contingent consideration for the Q3C acquisition.  These losses were offset by a $6.5 million reduction of liabilities for contingent consideration since the Sprint, Saxon, and FSSI acquisitions did not meet the performance targets outlined in their purchase agreements.

The provision for income taxes for the 2013 fourth quarter was $14.6 million, for an effective tax rate on net income attributable to Primoris of 39.4%, compared to $9.0 million, for an effective tax rate on net income attributable to Primoris of 34.5%, in the 2012 fourth quarter.  The increase in the effective tax rate was primarily caused by the favorable tax treatment of the Rockford settlement in 2012.

Net income attributable to Primoris for the 2013 fourth quarter was $22.5 million, or $0.44 per diluted share, compared to net income of $17.0 million, or $0.33 per diluted share, in the same period in 2012.

Fully diluted shares outstanding for the 2013 fourth quarter increased by 0.5% to 51.7 million from 51.4 million in 2012’s fourth quarter.  The increase in shares was due to shares issued as part of the Q3C acquisition, for director compensation and for the company’s long-term incentive program.

2013 FULL YEAR RESULTS OVERVIEW

Segment Revenues

(in thousands, except %)

Segment Gross Profit

(in thousands, except %)

OTHER FINANCIAL INFORMATION

Primoris’ balance sheet at December 31, 2013 included cash, cash equivalents, and short-term investments of $214.8 million, working capital of $229.5 million, total debt and capital leases of $225.1 million and stockholders’ equity of $398.4 million.  Primoris’ tangible net worth at December 31, 2013 was $233.5 million.  The balance sheet included a $9.2 million liability representing the estimated fair value earnout payment for Q3C’s financial performance for 2013 and potential earnout payment for Q3C’s financial performance for 2014.

BACKLOG

At December 31, 2013, total backlog using our historic calculation was $1.48 billion compared to $1.35 billion at December 31, 2012.  In 2013, approximately $489.6 million of annual revenue was generated by projects that were not included in the historic backlog calculation.

As previously discussed, we have changed our backlog calculation to better reflect the company’s increasing percentage of revenues derived from MSAs as a result of the acquisitions of Sprint and Q3C.  The new calculation includes estimated MSA revenues for the next four quarters.  With this addition to the backlog calculation, the new total backlog at December 31, 2013 was $1.94 billion.  We expect that during the next four quarters, using the revised backlog amounts, we will recognize as revenue approximately 53% of the East Construction Services segment backlog, approximately 98% of the West Construction Services segment backlog, and approximately 93% of the Engineering  segment.

Backlog, including estimated MSA revenues, should not be considered a comprehensive indicator of future revenues, as a portion of Primoris’ revenues are still derived from projects that are not part of backlog, including time-and-equipment, time-and-materials, and cost-reimbursable-plus-fee contracts.  Additionally, projects that are considered a part of backlog or MSA contracts may be cancelled by our customers.

SHARE REPURCHASE PLAN

The Company’s Board of Directors has authorized a share repurchase program under which Primoris may, from time to time and depending on market conditions, share price and other factors, acquire shares of its common stock on the open market or in privately negotiated transactions up to an aggregate purchase price of $23 million. The share repurchase program expires December 31, 2014.

CONFERENCE CALL

Brian Pratt, Chairman, President and Chief Executive Officer, and Peter J. Moerbeek, Executive Vice President and Chief Financial Officer will host a conference call today, Friday, February 28, 2014 at 11:00 am Eastern Time / 10:00 am Central Time to discuss the results.

Interested parties may participate in the call by dialing:

·            (877) 407-8293 (Domestic)

·            (201) 689-8349 (International)

If you are unable to participate in the live call, a replay may be accessed by dialing (877) 660-6853, passcode 13576653, and will be available for approximately two weeks. The conference call will also be broadcast live over the Internet and can be accessed and replayed through the Investor Relations section of Primoris’ website at www.prim.com. Once at the Investor Relations section, please click on “Events & Presentations”.

ABOUT PRIMORIS

Founded in 1946, Primoris, through various subsidiaries, has grown to become one of the largest construction service enterprises in the United States. Serving diverse end markets, Primoris provides a wide range of construction, fabrication, maintenance, replacement, water and wastewater, and engineering services to major public utilities, petrochemical companies, energy companies, municipalities, and other customers. The Company’s national footprint extends from Florida, along the Gulf Coast, through California, into the Pacific Northwest and Canada.  For additional information, please visit www.prim.com.

FORWARD LOOKING STATEMENTS

This press release contains certain forward-looking statements, including with regard to the Company’s future performance. Words such as “estimated,” “believes,” “expects,” “projects,” “may,” and “future” or similar expressions are intended to identify forward-looking statements.  Forward-looking statements inherently involve risks and uncertainties, including without limitation, those described in this press release and those detailed in the “Risk Factors” section and other portions of our Annual Report on Form 10-K for the period ended December 31, 2013, and other filings with the Securities and Exchange Commission.  Primoris does not undertake any obligation to publicly update or revise any forward-looking statements, whether as a result of new information, future events or otherwise, except as may be required under applicable securities laws.

CONDENSED CONSOLIDATED STATEMENTS OF INCOME

(In Thousands, Except Per Share Amounts)

(Unaudited)

CONDENSED CONSOLIDATED BALANCE SHEETS

 (In Thousands, Except Share Amounts)

(Unaudited)