TSX - SWY LAST: 0.37 -0.01 -1.33% Vol: 162,788 August 17, 2018

This website contains forward-looking information (as defined in National Instrument 51-102 – Continuous Disclosure Obligations) and forward-looking statements within the meaning of Canadian securities legislation and the United States Private Securities Litigation Reform Act of 1995 (collectively referred to herein as “forward-looking information” or “forward-looking statements”). These forward-looking statements are made as of the date of the presentation, press release or webpage update and the Corporation does not intend, and does not assume any obligation, to update these forward-looking statements, except as required by law. Capitalized terms in these FLS not otherwise defined in this presentation have the meaning attributed thereto in the most recently filed AIF of the Corporation.

These forward-looking statements relate to future events or future performance and include, among others, statements with respect to Stornoway’s objectives for the ensuing year, our medium and long-term goals, and strategies to achieve those objectives and goals, as well as statements with respect to our management’s beliefs, plans, objectives, expectations, estimates, intentions and future outlook and anticipated events or results. Although management considers these assumptions to be reasonable based on information currently available to it, they may prove to be incorrect.

Forward-looking statements reflect current expectations or beliefs regarding future events and include, but are not limited to, statements with respect to: (i) the amount of Mineral Reserves, Mineral Resources and exploration targets; (ii) the estimated amount of future production over any period; (iii) net present value and internal rates of return of the mining operation; (iv) expectations and targets relating to recovered grade, size distribution and quality of diamonds, average ore recovery, internal dilution, mining dilution and other mining parameters set out in the 2016 Technical Report as well as levels of diamond breakage; (v) expectations, targets and forecasts relating to gross revenues, operating cash flows and other revenue metrics set out in the 2016 Technical Report, growth in diamond sales, cost of goods sold, cash cost of production, gross margins estimates, planned and projected diamond sales, mix of diamonds sold, and capital expenditures, liquidity and working capital requirements; (vi) mine and resource expansion potential, expected mine life, and estimated incremental ore recovery, revenue and other mining parameters from potential additional mine life extension; (vii) expected time frames for completion of permitting and regulatory approvals related to ongoing construction activities at the Renard Diamond Mine; (viii) the expected time frames for the completion of the open pit and underground mine at the Renard Diamond Mine; (ix) the expected financial obligations or costs incurred by Stornoway in connection with the ongoing development of the Renard Diamond Mine; (x) mining, development, production, processing and exploration rates, progress and plans, as compared to schedule and budget, and planned optimization, expansion opportunities, timing thereof and anticipated benefits therefrom; (xi) future exploration plans and potential upside from targets identified for further exploration; (xii) expectations concerning outlook and trends in the diamond industry, rough diamond production, rough diamond market demand and supply, and future market prices for rough diamonds and the potential impact of the foregoing on various Renard financial metrics and diamond production; (xiii) the economic benefits of using liquefied natural gas rather than diesel for power generation; (xiv) sources of and anticipated financing requirements; (xv) the ability to meet Subject Diamonds Interest delivery obligations under the Purchase and Sale Agreement; (xvi) the foreign exchange rate between the US dollar and the Canadian dollar; and (xvii) the anticipated benefits from recently approved plant modification measures and the anticipated timeframe and expected capital cost thereof. Any statements that express or involve discussions with respect to predictions, expectations, beliefs, plans, projections, objectives, assumptions or future events or performance (often, but not always, using words or phrases such as “expects”, “anticipates”, “plans”, “projects”, “estimates”, “assumes”, “intends”, “strategy”, “goals”, “objectives”, “schedule” or variations thereof or stating that certain actions, events or results “may”, “could”, “would”, “might” or “will” be taken, occur or be achieved, or the negative of any of these terms and similar expressions) are not statements of historical fact and may be forward-looking statements.

Forward-looking statements are made based upon certain assumptions by Stornoway or its consultants and other important factors that, if untrue, could cause the actual results, performances or achievements of Stornoway to be materially different from future results, performances or achievements expressed or implied by such statements. Such statements and information are based on numerous assumptions regarding present and future business prospects and strategies and the environment in which Stornoway will operate in the future, including the recovered grade, size distribution and quality of diamonds, average ore recovery, internal dilution, and levels of diamond breakage, the price of diamonds, anticipated costs and Stornoway’s ability to achieve its goals, anticipated financial performance, regulatory developments, development plans, exploration, development and mining activities and commitments, and the foreign exchange rate between the US and Canadian dollars.

Although management considers its assumptions on such matters to be reasonable based on information currently available to it, they may prove to be incorrect. Certain important assumptions by Stornoway or its consultants in making forward-looking statements include, but are not limited to: (i) the accuracy of our estimates regarding capital and estimated workforce requirements; (ii) estimates of net present value and internal rates of return; (iii) recovered grade, size distribution and quality of diamonds, average ore recovery, internal dilution, mining dilution and other mining parameters set out in the 2016 Technical Report as well as levels of diamond breakage; (iv) the expected mix of diamonds sold, and successful mitigation of ongoing issues of diamond breakage in the Renard Diamond Mine process plant and realization of the anticipated benefits from plant modification measures within the anticipated timeframe and expected capital cost; (v) anticipated timelines for the development of an open pit and underground mine at the Renard Diamond Mine; (vi) anticipated geological formations; (vii) continued market acceptance of the Renard diamond production, conservative forecasting of future market prices for rough diamonds and impact of the foregoing on various Renard financial metrics and diamond production; (viii) the timeline, progress and costs of future exploration, development, production and mining activities, plans, commitments and objectives; (ix) the availability of existing credit facilities and any required future financing on favorable terms and the satisfaction of all covenants and conditions precedent relating to future funding commitments; (x) the ability to meet Subject Diamonds Interest delivery obligations under the Purchase and Sale Agreement; (xi) the continued strength of the US dollar against the Canadian dollar and absence of significant variability in interest rates; (xii) increasing carat recoveries with progressively increasing grade in LOM plan; (xiii) estimated incremental ore recovery, revenue and other mining parameters from potential additional mine life extension with minimal capital expenditures; (xiv) modest capital requirements post-2018 with significant resource expansion available at marginal cost; and (xv) limited cash income taxes payable over the medium term.

By their very nature, forward-looking statements involve inherent risks and uncertainties, both general and specific, and risks exist that estimates, forecasts, projections and other forward-looking statements will not be achieved or that assumptions do not reflect future experience. We caution readers not to place undue reliance on these forward- looking statements as a number of important risk factors could cause the actual outcomes to differ materially from the beliefs, plans, objectives, expectations, anticipations, estimates, assumptions and intentions expressed in such forward-looking statements. These risk factors may be generally stated as the risk that the assumptions and estimates expressed above do not occur, including the assumption in many forward-looking statements that other forward-looking statements will be correct, but specifically include, without limitation: (i) risks relating to variations in the grade, size distribution and quality of diamonds, kimberlite lithologies and country rock content within the material identified as Mineral Resources from that predicted; (ii) variations in rates of recovery and levels of diamond breakage; (iii) risks associated with our dependence on the Renard Diamond Mine and the limited operating history thereof; (iv) risks relating to fluctuations in the Canadian dollar and other currencies relative to the US dollar and variability in interest rates; (v) inaccuracy of our estimates regarding future financing and capital requirements and expenditures, significant additional future capital needs and unavailability of additional financing and capital, on reasonable terms, or at all; (vi) uncertainties related to forecasts, costs and timing of the Corporation’s future development plans, exploration, processing, production and mining activities; (vii) increases in the costs of proposed capital, operating and sustainable capital expenditures; (viii) increases in financing costs or adverse changes to the terms of available financing, if any; (ix) tax rates or royalties being greater than assume, (x) risks associated with ongoing issues of diamond breakage in the Renard Diamond Mine process plant and the failure to realize the anticipated benefits from plant modification measures within the anticipated timeframe and expected capital cost, or at all; (xi) the risks associated with our substantial indebtedness and the failure to meet our debt service obligations; and (xxix) the additional risk factors described herein and in Stornoway’s annual and interim MD&A, its other disclosure documents and Stornoway’s anticipation of and success in managing the foregoing risks. Stornoway cautions that the foregoing list of factors that may affect future results is not exhaustive and new, unforeseeable risks may arise from time to time.

Non-IFRS Financial Measures

This presentation refers to certain financial measures, such Adjusted EBITDA, Adjusted EBITDA margin, Net Income Before Impairment, Average diamond price achieved, Cash Operating Cost per Tonne of Ore Processed, Cash Operating Cost per Carat Recovered, Capital Expenditures and Available Liquidity, which are not measures recognized under IFRS and do not have a standardized meaning prescribed by IFRS. “Adjusted EBITDA” and “Adjusted EBITDA Margin” are used by management and investors to assess and measure the underlying pre-tax operating performance of the Corporation and are generally regarded by management as better measures to evaluate performance trends. “Adjusted EBITDA” is defined as net income (loss) before depreciation, interest and other financial (income) expenses, and income tax, adjusted for impairment charges, unrealized gains and losses related to the changes in fair value of U.S. Denominated debt and other non-recurring or unusual items that are not reflective of the Corporation’s underlying operating performance and/or unlikely to occur on a regular basis. “Adjusted EBITDA Margin” is the calculation of Adjusted EBITDA divided by total revenues. “Net Income Before Impairment” is used by the Corporation to evaluate earnings trends more readily in comparison with results from prior periods, as it excludes impairment charges deemed not reflective of the underlying operations of the Corporation. “Average diamond price achieved” is a measure used by the Corporation to measure the value of diamonds sold into the market in the period, prior to adjustments to reflect the impact of the stream. This measure is used by management and investors as it reflects the average diamond price achieved during the period and is more comparable to the average diamond price achieved by to other diamond producers. Average diamond price achieved is calculated based on reported revenues adjusted for the amortization of deferred stream revenue, and remittances made to/from stream participants and gains or losses from revenue hedging activities divided by the number of carats sold in the period. “Cash Operating Cost per Tonne Processed” and “Cash Operating Cost per Carat Recovered” are used by management and investors to measure the mine’s cash operating cost based on per tonne of ore processed or per carat recovered. Cash Operating Cost Per Tonne Processed is calculated based on reported operating expenses adjusted for the impact of inventory variation, excluding depreciation, divided by tonnes of ore processed for the period. Cash Operating Cost per Carat Recovered is the total cash operating cost divided by carats recovered. “Capital Expenditure” is the term used by the Corporation and investors to describe capital expenditures incurred during the period. This measure is used by management and investors to measure the amount of capital spent by the corporation on sustaining, margin improvement, and/or growth capital projects in the period. “Available Liquidity” comprises cash and cash equivalents, short-term investments and available credit facilities (less related upfront fees) and is used by the management and investors to measure the amount of cash resources available to the Corporation, over and above the cash generated from operations, to support the operating and capital requirements of the business.