MAMMOTH ENERGY SERVICES INC.
MAMMOTH ENERGY SERVICES INC.
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Ticker: TUSK
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Mammoth Energy Services, Inc. Announces First Quarter 2019 Operational and Financial Results

  • 23
  • First Quarter net income of $28 million, or $0.63 per diluted share
  • First Quarter Adjusted EBITDA of $83 million
  • Trailing twelve months after tax return on invested capital (ROIC) of 29%
  • Declared $0.125 dividend for the first quarter of 2019

OKLAHOMA CITY, May 01, 2019 (GLOBE NEWSWIRE) -- Mammoth Energy Services, Inc. ("Mammoth" or the "Company") (NASDAQ: TUSK) today reported financial and operational results for the quarter ended March 31, 2019.

Financial Highlights for the First Quarter of 2019:

Total revenue was $262.1 million for the three months ended March 31, 2019, down 6% sequentially from $278.2 million for the three months ended December 31, 2018 and down 47% from $494.2 million for the three months ended March 31, 2018.

Net income for the three months ended March 31, 2019 was $28.3 million, or $0.63 per fully diluted share, a 58% decrease from $68.2 million, or $1.51 per fully diluted share, for the three months ended December 31, 2018 and a 49% decrease from $55.5 million, or $1.24 per fully diluted share, for the three months ended March 31, 2018.

Adjusted EBITDA (as defined and reconciled below) was $82.8 million for the three months ended March 31, 2019, a slight decrease from $84.3 million for the three months ended December 31, 2018 and a 37% decline from $130.8 million for the three months ended March 31, 2018.

Arty Straehla, Mammoth's Chief Executive Officer, stated, "The first quarter of 2019 saw improved utilization of our oilfield completions focused businesses as E&P budgets were reset and oil prices experienced a steady increase throughout the quarter.  While pressure pumping pricing remains challenged, conversations with customers suggest the possibility for tighter industry conditions for the back half of the year. Demand for Northern White sand is strengthening, with our average pricing up approximately 90% from the lows experienced in fourth quarter of 2018. The movement of our infrastructure equipment from Puerto Rico back to the continental U.S. is progressing and beginning to displace equipment currently being rented, allowing us to deploy additional crews for our Continental U. S. customers."

Infrastructure Services

Mammoth's infrastructure services segment contributed revenues of $108.7 million for the three months ended March 31, 2019, a 32% decrease from $159.6 million for the three months ended December 31, 2018 and a 67% decrease from $325.5 million for the three months ended March 31, 2018. During the first quarter of 2019, our crew staffing levels in Puerto Rico reached a high of approximately 500 in January. As of March 31, 2019, a small contingent of non-billable personnel remained on the island to facilitate the demobilization of our remaining equipment.

Pressure Pumping Services

Mammoth's pressure pumping division contributed revenues (inclusive of inter-segment revenues) of $92.1 million for the three months ended March 31, 2019, a 27% increase from $72.8 million for the three months ended December 31, 2018 and a 9% decrease from $101.1 million for the three months ended March 31, 2018.

Mammoth's pressure pumping division completed a total of 1,889 stages for the three months ended March 31, 2019, a 62% increase from 1,164 stages for the three months ended December 31, 2018 and a 13% increase from 1,672 stages for the three months ended March 31, 2018. An average of 4.4 of our 6 fleets remained active throughout the first quarter of 2019.

Natural Sand Proppant Services

Mammoth's natural sand proppant division contributed revenues (inclusive of inter-segment revenues) of $37.9 million for the three months ended March 31, 2019, a 38% increase from $27.4 million for the three months ended December 31, 2018 and a 26% decrease from $51.0 million for the three months ended March 31, 2018.

The Company sold 665,806 tons of sand during the three months ended March 31, 2019, a 17% increase from the 569,195 tons sold during the three months ended December 31, 2018 and a 9% decrease from the 735,584 tons sold during the three months ended March 31, 2018. The Company's average production costs were approximately $12 per ton during the first quarter of 2019.

Other Services

Mammoth's other services, including contract land and directional drilling, coil tubing, pressure control, flowback, cementing, acidizing, equipment rentals, crude oil hauling and remote accommodations, contributed revenues (inclusive of inter-segment revenues) of $38.5 million for the three months ended March 31, 2019, a slight decrease from $38.8 million for the three months ended December 31, 2018 and a slight increase from $38.1 million for the three months ended March 31, 2018. The Company’s rental division drove a majority of the increase from the prior periods with the average amount of equipment on rent increasing from 357 for the three months ended March 31, 2018 to 500 for the three months ended December 31, 2018.  An average of 621 pieces of equipment were rented during the three months ended March 31, 2019.

Selling, General and Administrative Expenses

Selling, general and administrative ("SG&A") expenses were $17.3 million for the three months ended March 31, 2019, compared to $14.8 million for the three months ended December 31, 2018 and $38.5 million for the three months ended March 31, 2018.

Following is a breakout of SG&A expense (in thousands):

 Three Months Ended
 March 31, December 31,
 2019 2018 2018
Cash expenses:     
Compensation and benefits$9,230  $7,699  $9,409 
Professional services3,789  2,587  3,018 
Other(a)3,244  1,607  1,475 
Total cash SG&A expense16,263  11,893  13,902 
Non-cash expenses:     
Bad debt provision(b)4  25,527  (34)
Stock based compensation1,069  1,091  915 
Total non-cash SG&A expense1,073  26,618  881 
Total SG&A expense$17,336  $38,511  $14,783 


  
a.Includes travel-related costs, IT expenses, rent, utilities and other general and administrative-related costs.
b.$25.4 million of the bad debt expense recognized during the three months ended March 31, 2018 was subsequently reversed during the third quarter of 2018.

SG&A expenses, as a percentage of total revenue, were 7% for the three months ended March 31, 2019 compared to 5% for the three months ended December 31, 2018 and 8% for the three months ended March 31, 2018.

Liquidity

As of March 31, 2019, Mammoth had cash on hand totaling $21.3 million and outstanding borrowings under its revolving credit facility of $82.0 million. As of March 31, 2019, the Company had $93.5 million of available borrowing capacity under its revolving credit facility, after giving effect to $8.7 million of outstanding letters of credit, resulting in total liquidity of approximately $114.8 million. As of April 30, 2019, the Company had cash on hand totaling $32.5 million and outstanding borrowings under its revolving credit facility of $108.6 million.

Capital Expenditures

The following table summarizes Mammoth's capital expenditures by operating division for the periods indicated (in thousands):

 Three Months Ended
 March 31, December 31,
 2019 2018 2018
Infrastructure services(a)$3,254  $15,778  $22,409 
Pressure pumping services(b)7,329  7,866  9,632 
Natural sand proppant services(c)985  5,700  2,132 
Other(d)8,705  6,430  8,240 
Total capital expenditures$20,273  $35,774  $42,413 


  
a.Capital expenditures primarily for truck, tooling and other equipment for the periods presented.
b.Capital expenditures primarily for pressure pumping and water transfer equipment for the for the periods presented
c.Capital expenditures primarily for maintenance for the three months ended March 31, 2019 and December 31, 2018 and plant upgrades for the three months ended March 31, 2018.
d.Capital expenditures primarily for equipment for the Company's rental business and upgrades to its rig fleet for the periods presented.

Explanatory Note Regarding Financial Information

The financial information contained in this release should be read in conjunction with the financial information contained in Mammoth’s Annual Report to be filed on Form 10-K with the Securities and Exchange Commission ("SEC"), Quarterly Reports on Form 10-Q, Current Reports on Form 8-K and other filings.

The Company's Chief Executive Officer and Chief Financial Officer comprise the Company's Chief Operating Decision Maker function ("CODM"). Segment information is prepared on the same basis that the CODM manages the segments, evaluates the segment financial statements and makes key operating and resource utilization decisions. Segment evaluation is determined on a quantitative basis based on a function of operating income (loss) as well as a qualitative basis, such as nature of the product and service offerings and types of customers.

Conference Call Information

Mammoth will host a conference call on Thursday, May 2, 2019 at 10:00 a.m. CDT (11:00 am EDT) to discuss its first quarter 2019 financial and operational results. The telephone number to access the conference call is 844-265-1561 in the U.S. and the international dial in is 216-562-0385. The conference ID for the call is 9185999. The conference call will also be webcast live on www.mammothenergy.com in the “Investors” section.

About Mammoth Energy Services, Inc.

Mammoth is an integrated, growth-oriented energy service company serving companies engaged in the exploration and development of North American onshore unconventional oil and natural gas reserves and government-funded utilities, private utilities, public investor-owned utilities and co-operative utilities through its energy infrastructure services. Mammoth’s suite of services and products include: pressure pumping services, infrastructure services, natural sand and proppant services and other energy services.

For additional information about Mammoth, please visit its website at www.mammothenergy.com, where Mammoth routinely posts announcements, updates, events, investor information and presentations and recent news releases.

Investor Contact:
Don Crist
Director of Investor Relations
[email protected]
405-608-6048

Forward-Looking Statements and Cautionary Statements

This news release (and any oral statements made regarding the subjects of this release, including on the conference call announced herein) contains certain statements and information that may constitute “forward-looking statements” within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended, and the Private Securities Litigation Reform Act of 1995. All statements, other than statements of historical facts that address activities, events or developments that we expect, believe or anticipate will or may occur in the future are forward-looking statements. The words “anticipate,” “believe,” “ensure,” “expect,” “if,” “intend,” “plan,” “estimate,” “project,” “forecasts,” “predict,” “outlook,” “aim,” “will,” “could,” “should,” “potential,” “would,” “may,” “probable,” “likely” and similar expressions, and the negative thereof, are intended to identify forward-looking statements. Without limiting the generality of the foregoing, forward-looking statements contained in this press release specifically include statements, estimates and projections regarding our business outlook and plans, future financial position, liquidity and capital resources, operations, performance, acquisitions, returns, capital expenditure budgets, costs and other guidance regarding future developments. Forward-looking statements are not assurances of future performance. These forward-looking statements are based on management’s current expectations and beliefs, forecasts for our existing operations, experience and perception of historical trends, current conditions, anticipated future developments and their effect on us, and other factors believed to be appropriate. Although management believes that the expectations and assumptions reflected in these forward-looking statements are reasonable as and when made, no assurance can be given that these assumptions are accurate or that any of these expectations will be achieved (in full or at all). Moreover, our forward-looking statements are subject to significant risks and uncertainties, including those described in our Annual Reports on Form 10-K, Quarterly Reports on Form 10-Q, Current Reports on Form 8-K and other filings we make with the SEC, including those relating to our acquisitions and our contracts, many of which are beyond our control, which may cause actual results to differ materially from our historical experience and our present expectations or projections which are implied or expressed by the forward-looking statements. Important factors that could cause actual results to differ materially from those in the forward-looking statements include, but are not limited to: the failure to receive or delays in receiving governmental authorizations, approvals and/or payments; risks relating to economic conditions; delays in or failure of delivery of current or future orders of specialized equipment; the loss of or interruption in operations of one or more key suppliers or customers; the effects of government regulation, permitting and other legal requirements; operating risks; the adequacy of capital resources and liquidity; weather; natural disasters; litigation; competition in the oil and natural gas and infrastructure industries; and costs and availability of resources.

Investors are cautioned not to place undue reliance on any forward-looking statement which speaks only as of the date on which such statement is made. We undertake no obligation to correct, revise or update any forward-looking statement after the date such statement is made, whether as a result of new information, future events or otherwise, except as required by applicable law.


MAMMOTH ENERGY SERVICES, INC.
CONSOLIDATED BALANCE SHEETS
     
ASSETS March 31, December 31,
  2019 2018
CURRENT ASSETS (in thousands)
Cash and cash equivalents $21,343  $67,625 
Accounts receivable, net 404,389  337,460 
Receivables from related parties 45,032  11,164 
Inventories 18,913  21,302 
Prepaid expenses 8,913  11,317 
Other current assets 706  688 
     Total current assets 499,296  449,556 
     
Property, plant and equipment, net 428,280  436,699 
Sand reserves 71,496  71,708 
Operating lease right-of-use assets 56,234   
Intangible assets, net - customer relationships 1,637  1,711 
Intangible assets, net - trade names 5,835  6,045 
Goodwill 101,245  101,245 
Other non-current assets 6,484  6,127 
     Total assets $1,170,507  $1,073,091 
LIABILITIES AND EQUITY    
CURRENT LIABILITIES    
Accounts payable $67,542  $68,843 
Payables to related parties 609  370 
Accrued expenses and other current liabilities 55,258  59,652 
Current operating lease liability 17,533   
Income taxes payable 60,272  104,958 
     Total current liabilities 201,214  233,823 
     
Long-term debt 82,037   
Deferred income tax liabilities 63,923  79,309 
Long-term operating lease liability 38,572   
Asset retirement obligation 3,056  3,164 
Other liabilities 3,285  2,743 
     Total liabilities 392,087  319,039 
     
COMMITMENTS AND CONTINGENCIES    
     
EQUITY    
Equity:    
Common stock, $0.01 par value, 200,000,000 shares authorized, 44,876,649 issued
and outstanding at March 31, 2019 and December 31, 2018, respectively
 449  449 
Additional paid in capital 532,208  530,919 
Retained earnings 249,488  226,765 
Accumulated other comprehensive loss (3,725) (4,081)
     Total equity 778,420  754,052 
     Total liabilities and equity $1,170,507  $1,073,091 


MAMMOTH ENERGY SERVICES, INC.

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS)
  
 Three Months Ended
 March 31, December 31,
 2019 2018 2018
 (in thousands, except per share amounts)
REVENUE 
Services revenue$193,101  $408,659  $260,513 
Services revenue - related parties44,073  49,088  9,551 
Product revenue12,309  25,040  8,063 
Product revenue - related parties12,655  11,462  71 
Total revenue262,138  494,249  278,198 
      
COST AND EXPENSES     
Services cost of revenue (exclusive of depreciation, depletion, amortization and accretion of $25,682, $24,575
and $26,999, respectively, for the three months ended March 31, 2019, March 31, 2018 and December 31, 2018)
158,106  290,979  151,273 
Services cost of revenue - related parties (exclusive of depreciation, depletion, amortization and accretion of
$0, $0 and $0, respectively, for the three months ended March 31, 2019, March 31, 2018 and December 31, 2018)
713  1,792  240 
Product cost of revenue (exclusive of depreciation, depletion, amortization and accretion of $2,871, $2,314 and
$3,136, respectively, for the three months ended March 31, 2019, March 31, 2018 and December 31, 2018)
30,251  33,330  28,797 
Selling, general and administrative16,902  38,082  14,283 
Selling, general and administrative - related parties434  429  500 
Depreciation, depletion, amortization and accretion28,576  26,908  30,159 
Impairment of long-lived assets    4,086 
Total cost and expenses234,982  391,520  229,338 
Operating income27,156  102,729  48,860 
      
OTHER INCOME (EXPENSE)     
Interest expense, net(523) (1,237) (533)
Other, net24,557  (28) (1,122)
Total other income (expense)24,034  (1,265) (1,655)
Income before income taxes51,190  101,464  47,205 
Provision (benefit) for income taxes22,857  45,918  (21,002)
Net income$28,333  $55,546  $68,207 
      
OTHER COMPREHENSIVE INCOME     
Foreign currency translation adjustment, net of tax of ($90), $186 and $212, respectively,
for the three months ended March 31, 2019, March 31, 2018 and December 31, 2018
356  (461) (961)
Comprehensive income$28,689  $55,085  $67,246 
      
Net income per share (basic)$0.63  $1.24  $1.52 
Net income per share (diluted)$0.63  $1.24  $1.51 
Weighted average number of shares outstanding (basic)44,929  44,650  44,845 
Weighted average number of shares outstanding (diluted)45,063  44,884  45,048 
Dividends declared per share$0.125    $0.125 


MAMMOTH ENERGY SERVICES, INC.
CONSOLIDATED STATEMENTS OF CASH FLOWS
  
 Three Months Ended
 March 31,
 2019 2018
 (in thousands)
Cash flows from operating activities:   
Net income$28,333  $55,546 
Adjustments to reconcile net income to cash provided by operating activities:   
Stock based compensation1,289  1,256 
Depreciation, depletion, accretion and amortization28,576  26,908 
Amortization of coil tubing strings535  565 
Amortization of debt origination costs82  100 
Bad debt expense4  25,527 
Loss (gain) on disposal of property and equipment94  (184)
Deferred income taxes(15,476) (12,117)
Other41   
Changes in assets and liabilities, net of acquisitions of businesses:   
     Accounts receivable, net(67,093) (25,722)
     Receivables from related parties(33,868) (12,550)
     Inventories1,854  5,060 
     Prepaid expenses and other assets2,389  294 
     Accounts payable(353) 8,302 
     Payables to related parties239  851 
     Accrued expenses and other liabilities(4,956) 1,636 
     Income taxes payable(44,684) 25,851 
Net cash (used in) provided by operating activities(102,994) 101,323 
    
Cash flows from investing activities:   
Purchases of property and equipment(20,273) (35,176)
Purchases of property and equipment from related parties  (598)
Contributions to equity investee(480)  
Proceeds from disposal of property and equipment1,500  286 
Net cash used in investing activities(19,253) (35,488)
    
Cash flows from financing activities:   
Borrowings from lines of credit82,000  31,000 
Repayments of lines of credit  (91,900)
Dividends paid(5,610)  
Principal payments on financing leases and equipment financing notes(457) (72)
Net cash provided by (used in) financing activities75,933  (60,972)
Effect of foreign exchange rate on cash32  (53)
Net change in cash and cash equivalents(46,282) 4,810 
Cash and cash equivalents at beginning of period67,625  5,637 
Cash and cash equivalents at end of period$21,343  $10,447 
    
Supplemental disclosure of cash flow information:   
Cash paid for interest$294  $1,442 
Cash paid for income taxes$91,955  $32,184 
Supplemental disclosure of non-cash transactions:   
Purchases of property and equipment included in accounts payable$5,016  $16,558 


MAMMOTH ENERGY SERVICES, INC.
SEGMENT INCOME STATEMENTS
(in thousands)
       
Three months ended March 31, 2019InfrastructurePressure
Pumping
SandAll OtherEliminationsTotal
Revenue from external customers$108,721 $90,595 $24,964 $37,858 $ $262,138 
Intersegment revenues 1,544 12,897 658 (15,099) 
Total revenue108,721 92,139 37,861 38,516 (15,099)262,138 
Cost of revenue, exclusive of depreciation, depletion, amortization and accretion58,965 64,211 30,252 35,642  189,070 
Intersegment cost of revenues 13,537 1,047 497 (15,081) 
Total cost of revenue58,965 77,748 31,299 36,139 (15,081)189,070 
Selling, general and administrative9,517 3,213 1,519 3,087  17,336 
Depreciation, depletion, amortization and accretion7,719 9,893 2,873 8,091  28,576 
Operating income (loss)32,520 1,285 2,170 (8,801)(18)27,156 
Interest expense, net39 198 30 256  523 
Other (income) expense, net(24,824)(1) 268  (24,557)
Income (loss) before income taxes$57,305 $1,088 $2,140 $(9,325)$(18)$51,190 


Three months ended March 31, 2018InfrastructurePressure
Pumping
SandAll OtherEliminationsTotal
Revenue from external customers$325,459 $96,579 $36,503 $35,708 $ $494,249 
Intersegment revenues 4,559 14,512 2,417 (21,488) 
Total revenue325,459 101,138 51,015 38,125 (21,488)494,249 
Cost of revenue, exclusive of depreciation, depletion, amortization and accretion194,076 66,612 33,330 32,083  326,101 
Intersegment cost of revenues1,791 15,402 4,286 267 (21,746) 
Total cost of revenue195,867 82,014 37,616 32,350 (21,746)326,101 
Selling, general and administrative31,851 2,663 1,644 2,353  38,511 
Depreciation, depletion, amortization and accretion2,407 13,986 2,316 8,199  26,908 
Operating income (loss)95,334 2,475 9,439 (4,777)258 102,729 
Interest expense, net76 504 80 577  1,237 
Other expense (income), net2 12 (13)27  28 
Income (loss) before income taxes$95,256 $1,959 $9,372 $(5,381)$258 $101,464 


Three months ended December 31, 2018InfrastructurePressure
Pumping
SandAll OtherEliminationsTotal
Revenue from external customers$159,610 $72,219 $8,133 $38,236 $ $278,198 
Intersegment revenues 560 19,273 542 (20,375) 
Total revenue159,610 72,779 27,406 38,778 (20,375)278,198 
Cost of revenue, exclusive of depreciation, depletion, amortization and accretion75,486 39,601 28,796 36,427  180,310 
Intersegment cost of revenues 19,787 253 308 (20,348) 
Total cost of revenue75,486 59,388 29,049 36,735 (20,348)180,310 
Selling, general and administrative9,689 1,768 1,170 2,156  14,783 
Depreciation, depletion, amortization and accretion7,425 10,952 3,138 8,644  30,159 
Impairment of long-lived assets308   3,778  4,086 
Operating income (loss)66,702 671 (5,951)(12,535)(27)48,860 
Interest expense, net82 177 40 234  533 
Other expense, net60 340 304 418  1,122 
Income (loss) before income taxes$66,560 $154 $(6,295)$(13,187)$(27)$47,205 

MAMMOTH ENERGY SERVICES, INC.
RECONCILIATION OF NON-GAAP FINANCIAL MEASURES

Adjusted EBITDA

Adjusted EBITDA is a supplemental non-GAAP financial measure that is used by management and external users of the Company's financial statements, such as industry analysts, investors, lenders and rating agencies. Mammoth defines Adjusted EBITDA as net income (loss) before depreciation, depletion, amortization and accretion expense, impairment of long-lived assets, acquisition related costs, public offering costs, stock based compensation, interest expense, net, other (income) expense, net (which is comprised of the (gain) or loss on disposal of long-lived assets) and provision (benefit) for income taxes, further adjusted to add back interest on trade accounts receivable. The Company excludes the items listed above from net income (loss) in arriving at Adjusted EBITDA because these amounts can vary substantially from company to company within the energy service industry depending upon accounting methods and book values of assets, capital structures and the method by which the assets were acquired. Adjusted EBITDA should not be considered as an alternative to, or more meaningful than, net income (loss) or cash flows from operating activities as determined in accordance with GAAP or as an indicator of Mammoth's operating performance or liquidity. Certain items excluded from Adjusted EBITDA are significant components in understanding and assessing a company’s financial performance, such as a company’s cost of capital and tax structure, as well as the historic costs of depreciable assets, none of which are components of Adjusted EBITDA. Mammoth's computations of Adjusted EBITDA may not be comparable to other similarly titled measures of other companies. The Company believes that Adjusted EBITDA is a widely followed measure of operating performance and may also be used by investors to measure its ability to meet debt service requirements.

The following tables provide a reconciliation of Adjusted EBITDA to the GAAP financial measure of net income (loss) on a consolidated basis and for each of the Company's segments (in thousands):

Consolidated

 Three Months Ended
 March 31, December 31,
Reconciliation of Adjusted EBITDA to net income:2019 2018 2018
Net income$28,333  $55,546  $68,207 
Depreciation, depletion, accretion and amortization expense28,576  26,908  30,159 
Impairment of long-lived assets    4,086 
Acquisition related costs  (46) 61 
Public offering costs    (10)
Stock based compensation1,289  1,256  1,094 
Interest expense, net523  1,237  533 
Other (income) expense, net(24,557) 28  1,122 
Interest on trade accounts receivable25,735     
Provision (benefit) for income taxes22,857  45,918  (21,002)
Adjusted EBITDA$82,756  $130,847  $84,250 

Infrastructure Services

 Three Months Ended
 March 31, December 31,
Reconciliation of Adjusted EBITDA to net income:2019 2018 2018
Net income$35,665  $47,299  $141,875 
Depreciation and amortization expense7,719  2,407  7,425 
Impairment of long-lived assets    308 
Acquisition related costs  (8) 61 
Public offering costs    (10)
Stock based compensation462  457  470 
Interest expense39  76  82 
Other (income) expense, net(24,824) 2  60 
Interest on trade accounts receivable25,735     
Provision (benefit) for income taxes21,639  47,957  (75,315)
Adjusted EBITDA$66,435  $98,190  $74,956 

Pressure Pumping Services

 Three Months Ended
 March 31, December 31,
Reconciliation of Adjusted EBITDA to net income:2019 2018 2018
Net income$1,088  $1,959  $154 
Depreciation and amortization expense9,893  13,986  10,952 
Stock based compensation410  418  318 
Interest expense198  504  177 
Other (income) expense, net(1) 12  340 
Adjusted EBITDA$11,588  $16,879  $11,941 

Natural Sand Proppant Services

 Three Months Ended
 March 31, December 31,
Reconciliation of Adjusted EBITDA to net income (loss):2019 2018 2018
Net income (loss)$2,140  $9,372  $(6,295)
Depreciation, depletion, accretion and amortization expense2,873  2,316  3,138 
Acquisition related costs  (38)  
Stock based compensation203  186  181 
Interest expense30  80  40 
Other (income) expense, net  (13) 304 
Adjusted EBITDA$5,246  $11,903  $(2,632)

Other Services(a)

 Three Months Ended
 March 31, December 31,
Reconciliation of Adjusted EBITDA to net income (loss):2019 2018 2018
Net (loss) income$(10,542) $(3,342) $(67,500)
Depreciation and amortization expense8,091  8,199  8,644 
Impairment of long-lived assets    3,778 
Stock based compensation214  195  125 
Interest expense, net256  577  234 
Other expense, net268  27  418 
Provision (benefit) for income taxes1,217  (2,039) 54,313 
Adjusted EBITDA$(496) $3,617  $12 


  
a.Includes results for Mammoth's contract land and directional drilling, coil tubing, pressure control, flowback, cementing, acidizing, equipment rentals, crude oil hauling and remote accommodations services and corporate related activities. The Company's corporate related activities do not generate revenue.

After Tax Return on Invested Capital

After tax return on invested capital is a supplemental non-GAAP measure that is used by management to evaluate the Company's performance. Mammoth defines after tax return on invested capital as net income divided by total capital employed, which is the average of ending debt and equity for the last two years. Management believes after tax return on invested capital is a useful measure of how effectively the Company uses capital to generate profits and it provides additional insight for analysts and investors in evaluating the Company's financial and operating performance. After tax return on invested capital should not be considered in isolation or as a substitute for financial measures reported in accordance with GAAP. The following table provides the calculation of after tax return on invested capital using the GAAP financial measures of net income, total debt and total equity.

 Twelve Months Ended
 March 31,
 2019 2018 2017
 (in thousands)
Net income$208,752  $119,491   
Capital Employed     
Total debt$82,037  $39,000  $ 
Total equity778,420  564,137  418,597 
Total capital employed$860,457  $603,137  $418,597 
      
Average capital employed(a)$731,797  $510,867   
Trailing twelve month after tax return on invested capital(b)29% 23%  


  
a.Average capital employed is the average of total capital employed as of end of the period and end of the prior period.
b.After tax return on invested capital is the ratio of net income for the period to average capital employed.

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