Pure-Play Molybdenum Opportunity

Bruce D. HansenChief Executive Officer

Corporate Update

October 2018

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Cautionary StatementsStatements herein that are not historical facts are "forward-looking statements" within the meaning of Section 27A of the Securities Act, as amended and Section 21E of the Securities Exchange Act of 1934, as amended and are intended to be covered by the safe harbor created by such sections. Such forward-looking statements involve a number of risks and uncertainties that could cause actual results to differ materially from those projected, anticipated, expected, or implied by the Company. These risks and uncertainties include, but are not limited to metals price and production volatility, global economic conditions, currency fluctuations, increased production costs and variances in ore grade or recovery rates from those assumed in mining plans, exploration risks and results, political, operational and project development risks, including the Company's ability to obtain a re-grant of its water permits and Record of Decision, ability to maintain required federal and state permits to continue construction, and commence production of molybdenum, copper, silver, lead or zinc, ability to identify any economic mineral reserves of copper, silver, lead or zinc; ability of the Company to obtain approval of its joint venture partner at the Mt. Hope Project in order to mine for copper, silver, lead or zinc, ability to raise required project financing or funding to pursue an exploration program related to potential copper, silver lead or zinc deposits at Mt. Hope, ability to respond to adverse governmental regulation and judicial outcomes, and ability to maintain and /or adjust estimates related to cost of production, capital, operating and exploration expenditures. For a detailed discussion of risks and other factors that may impact these forward looking statements, please refer to the Risk Factors and other discussion contained in the Company's quarterly and annual periodic reports on Forms 10-Q and 10-K, on file with the SEC. The Company undertakes no obligation to update forward-looking statements.

Cautionary Note to U.S. Investors Concerning Estimates of Reserves and Resources

Calculations with respect to "proven reserves" and "probable reserves" referred to herein have been made in accordance with, and using thedefinitions of National Instrument 43-101, as required by Canadian securities regulatory authorities. For United States reporting purposes, theU.S. SEC applies a different standard in order to classify mineralization as a "reserve". Under SEC standards, mineralization may not beclassified as a "reserve" unless the determination has been made that the mineralization could be economically and legally extracted orproduced at the time the reserve determination is made. No such determinations have been made with respect to any mineralization at theLiberty project, and it cannot be assured that such a determination will be made. This presentation also uses the terms “measured”,“indicated” and “inferred” resources. We caution U.S. investors that while such terms are recognized and required by Canadian SecuritiesAdministrators pursuant to the National Instrument 43-101, the SEC does not recognize them. U.S. investors are cautioned not to assume thatany part or all of mineral deposits in these categories will ever be converted into reserves. “Inferred Resources”, in particular, have a greatamount of uncertainty as to their existence, and great uncertainty as to their economic and legal feasibility. It cannot be assumed that all orany part of an Inferred Mineral Resource will ever be upgraded to a higher category. Under Canadian Securities Administration rules,estimates of Inferred Mineral Resources may not form the basis of feasibility or pre-feasibility studies. U.S. investors are cautioned not toassume that part or all of an inferred resource exists, or is economically or legally minable.

Please refer to End Notes in the Appendix.

The Qualified Person’s statement related to exploration is in End Note 5 in the Appendix.

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Investment Highlights – only pure-play, western exchange traded moly stock

▪ Mt. Hope Project,

one of world’s

largest & highest

grade moly

deposits, and

previously mined

Liberty Project

▪ Drilling of high-

grade Cu-Ag

Target & zinc

mineralized

skarns

World-Class Moly with Cu-

Ag-Zn Potential

Medium-Term Producer

Strategic

PartnershipsTangible

ValueFinancial

Status

▪ Mt. Hope Project

bankable feasibility

complete; 65%

engineered

▪ Advancing SEIS

towards new ROD

anticipated in early

2019

▪ Water rights

hearing completed;

water permits

anticipated in early

2019

▪ Develop upon

sustained market

improvement &

financing

▪ Strategic

relationship with

largest share-

holder, Chinese

multinational

AMER

▪ Mt. Hope partner-

ship with Korean

POSCO unit

▪ Off-take sales

agreements with

international

companies –

ArcelorMittal,

SeAH Besteel and

Sojitz

▪ 80% interest in

$88.1M of plant &

mine equipment at

Mt. Hope Project i

▪ $21.1M in other

tangible Company

assets i

▪ June 30, 2018 cash

$4.7M i

▪ Anticipated

quarterly burn rate

of $1.3M per

quarter for 2018,

excluding

exploration drilling

▪ Mt. Hope Project

restricted cash of

$8.2M sufficient to

sustain project into

2021 i

i. Please see the Company’s news release and Form 10Q for 2Q 2018 results filed on August 14, 2018.

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Capital Structure

▪ Major institutional shareholders, shares held:▪ AMER 27.97M

▪ Hanlong 11.84M

▪ APERAM AMO Holding i 8.26M

▪ Vanguard Group 3.35M

▪ Blackrock Fund Advisors 1.56M

▪ Insider ownership total ii 36.06M

▪ Bruce Hansen, CEO 5.21M

▪ Other senior management 2.89M

▪ Research coverage▪ Heiko Ihle, H.C. Wainwright

▪ John Tumazos, John Tumazos Very Independent Research

Exchanges: TickerNYSE AMER; TSX: GMO

Recent stock price $0.21

Stock 52-week high/low $0.46/$0.19

Shares outstanding (M) 137.1

Recent moly price iii $11.96

Moly 52-week high/low iii$13.00/$8.25

Financial Highlights iv (M) 6/30/2018

Cash and cash equivalents $4.7

Working capital $5.0

Restricted cash at Mt. Hope $8.2

Long-term debt & sr. convert. $7.1

Total shareholders’ equity $105.8

i. APERAM, the former stainless steel division of ArcelorMittal, was spun off as a separate public company in 2011.ii. Insider ownership includes AMER shareholdings on basic shares outstanding.iii. Source: Plattsiv. See the Company’s Form 10Q for 2Q 2018 results filed on August 14, 2018.

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Moly Price Consistent Performer(Through Oct. 15, 2018, %)

Source: Bloomberg, BMO Capital Markets

>40% for rolling 1 year

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Moly, Nickel and Oil ▪ Moly and nickel are used in stainless steel and other special steels, including oil country tubular goods.

▪ The oil and gas, and petrochemical industry account for ~30% of the total end use for moly.

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$18

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1/4/2013 1/4/2014 1/4/2015 1/4/2016 1/4/2017 1/4/2018

Oil (Brent crude per barrel)

Moly and Nickel (per lb)

Oil (RHS)

Moly (LHS)

Nickel (LHS)

Source: Bloomberg, CPM Group

Through Oct. 5, 2018

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Molybdenum Price Projections

Historical Monthly Prices 2006-To Date i CPM Price Projections ii

i. Source: Plattsii. CPM Group’s Molybdenum Market Outlook Update, June 2018, projected real prices based on 2017 real dollars.

$11.85

$14.70$15.08

$14.51

(Base: 2017)

$15.43

$15.62$16.77

$12.37

$16.14$17.55

$14.36

$16.35

$19.36

$16.29

2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019p 2020p 2021p 2022p 2023p 2024p 2025p

Current price is more than 2.5

times fromOct 2015 bottom

Current moly price

$11.96

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Moly Supply Deficit Approaching

World Moly Supply and Demand BalanceAnnual, Projected through 2026p

Source: CPM Group’s Molybdenum Market Outlook Update, October 2017 – Base Case estimates.

0

7

14

21

28

35

42

-30

-15

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30

45

60

1995 1998 2001 2004 2007 2010 2013 2016 2019p 2022p 2025p

US$/Lb.Million Pounds

Real Molybdenum Prices (RHS)

Deficit (LHS)

Surplus (LHS)

Actual Projections

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Moly Growth Catalysts = Further Price Increase

* Compound Annual Growth Rate, 2012-2017, source: International Stainless Steel ForumSources: i. CPM Group ii. Baker Hughes, a GE company. iii. U.S. Dept of Energy’s Economic Information Administration. iv. World Bank.v. J.P. Morgan-IHS Markit Global Manufacturing PMI.

Current moly price/ lb

Up 45% from 52-weeklow of $8.25= $11.96 =

Supply constriction approaching; strengthening demand▪ Moly market surplus shrinking in 2018 and tipping into deficit in 2019iv

▪ Byproduct moly supply to peak in 2019i

▪ Robust oil and gas industry driving energy infrastructure and drilling

▪ Worldwide drill rig count up 8.5% YOY in September 2018ii

▪ From shale revolution, U.S. to become net exporter of energy by 2022iii

▪ World crude steel production up 4.6% YOY in 1H 2018

▪ World stainless steel demand increased 10% YOY in 1Q 2018; 5% CAGR last 6 years*

▪ Global economy still growing but slowing; projected expansion 3.1% in 2018iv

▪ China to grow 6.4% in 2018, after 6.8% growth in 2017iv

▪ U.S. manufacturing PMI at 4-month high at 55.6 compared with 52.2 for global manufacturing PMI in September.v

▪ Late business cycle positive for commodities. Moly is late-stage industrial metal.

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Demand:Diverse End Uses of Moly

10Source: SMR Research

5%

3%

4%

6%

7%

8%

10%

13%

15%

15%

15%

Other Applications

Electronics & Medical

Aerospace & Defense

Building & Construction

Power Generation

Other Transportation

Process Industry

Mechanical Engineering

Automotive

Chemical / Petrochemical

Oil & Gas Oil & Gas - Refinery catalysts, LNG development, shale gas installations, off-shore /deep ocean oil production

Chemical / Petrochemical - Corrosion inhibitors, chemical catalysts, fertilizers, waste water treatment

Automotive - Engines, pistons, crankshafts, axle shafts, steering components

Mechanical Engineering - Heavy machinery, mining equipment, cutting tools

Process Industry - Food processing equipment and storage, metal / steel processing, desalination

Other Transportation - Locomotive shafts, train wheels, brake pads, shipbuilding (bulkheads and hulls)

Power Generation - Coal, oil, gas and nuclear power plants, wind turbines, hydro and solar energy

Building & Construction - Major infrastructure: bridges & tunnels, anchors, rebars, heating / ventilation systems

Aerospace & Defense - Turbine parts, jet engines, landing gear, piping systems, armored vehicles

Electronics & Medical - Semiconductors, pharmaceutical and biotechnology processing equipment, x-ray tubes

Other Applications - Pigments, coatings, lubricants

Energy & Transportation

45%

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Global Steel Market Strengthening

Sources: Top left, International Stainless Steel Forum. Top right, CPM Group, ISSF, World Steel Association. Bottom charts, World Steel, customs data, BMO Capital Markets. For the bottom right chart, EM is “Emerging Markets.”

Stainless steel has risen at 5% CAGR over past 6 years. Global stainless : crude steel ratio rising, driven by China & Asia.

Global crude steel apparent consumption accelerated in 1H18.

(metric ton/year)

Contribution to global steel consumption growth.

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China Needs More Moly-Alloyed Steels

Sources: Left, CPM Group, World Steel, IMOA, Antaike. Right, International Stainless Steel Forum, CPM Group-Molybdenum Quarterly, Oct. 2018

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China’s consumption of moly in steel-making is catching up to the developed nations. –

Moly intensity of use (2016E)

Stainless steel production in China increased by 19.5% from 2010 to 2016, and a further 5% in 2017. –

China’s stainless steel consumption (bars) and demand index

Consumption (000mt)

Demand Index(2010 =100)Kg moly per 100 mt

of crude steel (000)

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Continued Moly Demand in China

13The Jiaozhou Bay Bridge is the world's longest cross-sea bridge, stretching nearly 26 miles, which would span the English Channel.

▪ CPM projects China’s molybdenum demand at 4.7% CAGR for 2016-2025.

▪ China leads the world in mega infrastructure construction.

▪ Megacity in the Pearl River Delta, enveloping Shenzhen and Guangdong

▪ The Xiongan new area outside of Beijing

▪ President Xi’s One Belt One Road mission to link China to the world

By 2030, China will have integrated nine cities in the Pearl River Delta into the world’s largest megacity, twice the size of So. Korea.

Chinese Infrastructure Investment YOY Growth Rates (Through 2016)

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Strategic Partner & Largest Shareholder: AMER

14i. Source for AMER background: Fortune, Forbes & AMER’s website.* See End Note 2 in the Appendix.

AMER International Group Snapshot i

Largest GMO shareholder

22% stake from Tranche 1& 227.9M shares + warrants

Three-trancheinvestment in General Moly *

Invested $4M in 2015 and $6M in 2017.Future Tranche 3 for additional $10M.

Fortune Global 500 ranking

Privately owned; 183rd on annual revenues of $49.7B

Majorbusinesses

Non-ferrous metals (copper mining, downstream wire/cable fabrication & trading); value-added manufacturing of semi-conductors & polymers

Employees Over 17,000

Headquarters Shenzhen, China

Chairman Mr. Wang Wenyin, ranked 13th richest billionaire in China in 2018 by Forbes

Chairman Wang, August 2017:

“We are confident about a rewarding future from a quality management team, the development of the Mt. Hope Project as the best, low-cost primary molybdenum asset in the world and continued increases in the molybdenum price.”

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Key Terms of Investment Agreement*

15* See End Note 2 in the Appendix.

Bank LoanTo develop Mt. HopeTo Come:

Tranche 3 $10MClosed

Tranche 2$6MClosed

Tranche 1$4M

▪ November 2015:

$4M private

placement by

AMER at

$0.30/share

▪ October 2017:

Closed $6M

private placement

by AMER at

$0.41/share

▪ $10M private

placement by

AMER to be

priced at

$0.50/share upon

meeting certain

conditions

▪ AMER to help

procure and

support a $700M

Bank Loan from

major Chinese

bank(s) for

development of

the Mt. Hope

Project upon

sustained

molybdenum

market

improvement

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General Moly’s Partnerships for Mt. Hope

▪ POS-Minerals, unit of Korean POSCO, owns 20% interest in the Mt. Hope Project

▪ Entitled to 8M lb of annual production▪ Contributed $210M to development

▪ World’s largest steel producer & Luxembourg based▪ General Moly’s largest customer

▪ Off-take agreements with Korean and Japanese companies

▪ Combined with ArcelorMittal sales contract, approximately 50% of General Moly production (15.5M lb) committed for first 5 years

Sales contracts’ floor prices of

$14.50 - $15.19Covers 37% of General Moly production

(11.5M lb/yr) over first 5 years

Sales contracts’ upside participation

80% of price

Above floor price

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Ownership 80% General Moly; 20% POSCO

Status Pre-constructionwork suspended

Estimated life * 30 years

Remaining capex, 100% $1.03B

First 5 years*:

40M lb/year$6.28 cash op. costs/lb

General Moly’s 80% interest LOM*:

NPV = $734M IRR = 18%After-tax, undiscounted cash flow= $3.8B

Flagship Mt. Hope –A World-Class Moly Project

▪ Leading primary development project in size and lowest costs

▪ Invested $289M in permitting & long-lead equipment

▪ Obtain reinstatement of the BLM’s Record of Decision and Nevada water permits i

▪ Outlook:

▪ Zinc-copper-silver exploration upside

▪ Improved financing ability with AMER upon market improvement

i See Slides 36 and 37 in the Appendix.* See End Note 1 in the Appendix.

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Supply: Molybdenum Costs Curve

18

World Molybdenum Cash Operating Costs, 2016 i

US cents/lb pro-rata; no credits

i. Chart represents approximately 93% of total molybdenum production. Source: CPM Group, SNL and company documents.ii.First five years of Optional Plan for Mt. Hope.

Mt. Hope’s Optional Plan cash operating costs $6.28/lb iii

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De-risking Mt. Hope Moly Project

Water Permits

• Completed hearing with State Engineer

• Anticipate decision in 1Q 2019

Record of Decision

• Supplemental EIS nearing publication and public hearing

• Anticipate decision in early 2019

Moly Price

• Moly price, volatile but improving

• Anticipate sustained higher prices into 2019

Project Financing

• Work with AMER on project financing

• Consider monetizing portion of 80% ownership

• Update bankable feasibility

Construction Decision

Anticipate in 2019

19i. Please refer to the Cautionary Statement in slide 2.

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Copper, Silver & Zinc Exploration i

▪ Targeting high-grade zinc

▪ Historical intermittent underground zinc production from 1886 to 1970s

▪ Zinc zone located at <400 feet deep; potentially surface mineable

▪ Targeting high-grade copper and silver

▪ Cu-Ag Target appears to be 550+ feet from surface, potentially accessible by decline ramp

▪ IP results indicated high chargeability zones. Anomalous zone open at depth.

▪ Skarns commonly display copper-bearing deposits near the igneous contact and zinc-bearing deposits lying farther distant

▪ Examples of copper-zinc skarn deposits:Antamina Mine, Peru; Taylor Project, Arizona; and Pinos Altos, New Mexico

▪ First phase $0.8M drilling program: 11 core holes; 5 holes reported

▪ Outlook:

▪ First phase goal: Confirm and extend high-grade Cu-Ag Target and test for upper zinc mineralized horizon.

▪ Further drill results in fall 2018

i. Please refer to exploration news releases, including Oct. 17 and Sept 4, 2018. See End Note 5 in the Appendix.

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Cu-Ag-Zn Exploration Plan Mapi, Mt. Hope

i. Please refer to exploration news releases, including Oct 16 and Sept 4, 2018. See End Note 5 in the Appendix.

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IP Cross Section, Drill Intercepts for CopperAssays pending for MH-255, targeting potential copper mineralized zone, and drilling underway of next hole MH-256, targeting potential zinc mineralized zone

i. Please refer to exploration news releases, including 16 Oct and 4 Sep 2018. See End Note 5 in the Appendix.

Looking Northwest

High ResistivityHigh

Chargeability

5 ft 3.8% Cu & 20.1 opt Ag

20 ft 2.9% Cu &6.6 opt Ag

Induced Polarization Cross Section

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Mt. Hope Initial Drill Results for Zn-Cu-Ag i

▪ Hole MH-249

▪ 74.5 feet of 13.08% zinc from a depth of 80.5 feet

▪ Hole MH-250

▪ 96.5 feet of 1.16% zinc from a depth of 220.5 feet

▪ Hole MH-251

▪ 50 feet of 8.72% zinc from a depth of 76 ft, including• 25 feet of 13.09% zinc

▪ 20 feet of 2.9% copper and 6.57 opt silver from a depth of 571 feet, including• 10 feet of 4.54% copper and 10.37 opt silver

▪ Hole MH-252

▪ 30 feet of 3.93% zinc from a depth of 101 feet

▪ 24 feet of 3.05% zinc from a depth of 146 feet

▪ 53 feet of 6.66% zinc from a depth of 215 feet

▪ Hole MH-253

▪ 45 feet of 4.61% zinc from a depth of 76 feet

▪ 80 feet of 0.58% Cu and 2.14 opt silver from a depth of 556 feet, including • 5 feet of 3.81% copper and 20.12 opt silver

▪ 6 feet of 2.75% copper and 2.64 opt silver from a depth of 1,158 feet

i. Please refer to exploration news releases, including 16 Oct and 4 Sep 2018. See End Note 5 in the Appendix.

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First 5 years*:

14M Mo lb

& 7.5M Cu lb /year

$7.79 cash op. costs/lb Mo

LOM NPV* = $325M IRR* = 17%LOM after-tax, undisc. cash flow*= $1.7B

Follow On –Liberty Moly-Copper Project

▪ Another world-class moly asset

▪ Previously mined for molybdenum and copper ▪ Significant infrastructure remains

(electrical, roads, truck shops)

▪ Mining friendly location in Nevada

▪ Outlook: Advancement to Feasibility Study contingent on market improvement

Ownership 100%

Status Completed PFS

Estimated life* 32 years

Capex* $366M

* See End Note 3 in the Appendix.

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NPV Shows Significant Leverage to Rising Moly Prices

Mt. Hope, Liberty and Combined NPV* ($M)

25

$289

$734

$1,194

$85

$325

$559

$12.50 $15.00 $17.50

Mt. Hope Liberty

Molybdenum price/lb

$374

$1,059

$1,753

* See End Notes 1, 3 and 4 in the Appendix.

Current moly price level

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General Moly has Significant Leverageto the Molybdenum Price

Every $1/lb change in moly price between $10-$20/lb* NPV

Mt. Hope Project +/- $180M

Liberty Project +/- $95M

General Moly Total NPV +/- $275M

Projects’ Breakeven Prices

Mt. Hope NPV breakeven price /lb $10.82

Mt. Hope cash flow breakeven price /lb $9.35

Liberty NPV breakeven price /lb $11.64

Liberty cash flow breakeven price /lb $9.58

* See End Note 4 in the Appendix.

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Significant Tangible Asset Value

27

($M, except per share) Current

Cash and cash equivalents (Corporate) i 4.7

Restricted cash to be used for loan procurement fund orbusiness opportunities i 0.5

Share of Mt. Hope Project cash(Restricted cash) i 6.5

Share of Mt. Hope’s property, plant & equipment ii 70.4

Cost basis in land, water rights & Liberty Project i 21.1

Long-term debt and convertible debt i (7.1)

Net Tangible Assets 96.1

Net Tangible Assets/GMO share $0.70

i. Please refer to the news release and Form 10-Q on Aug. 14, 2018. ii. Represents Company’s 80% ownership of $88.0M in PP&E in the Consolidated Balance Sheets.

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2018 Priorities

▪ Further exploration of copper, silver and zinc at Mt. Hope

▪ Progress towards obtaining a ROD and reissuance of water permits for the Mt.

Hope Project, anticipated by early 2019

▪ Continue to reduce overhead costs and manage financial position

Drill resultsWater

permitsSEIS/ROD

AMER Pte. Placement

AdvanceZn-Cu-Ag

Potential Catalysts Over Next 12 months

And Improving Moly Market Fundamentals

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Appendix

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0.0

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8

Industrial Metals Undervalued vs. EquitiesS&P GSCI Industrial Metals Index (SPGSINTR)/ S&P 500 Index (SPX)

(From inception of SPGSINTR January 7, 1977-Oct. 12, 2018)

Source: Bloomberg

Energy Crisis

Gulf Crisis

Global Financial

Crisis

Black Monday

Dot Com Bubble

Current: Bottom Forming

1977 1979 1981 1983 1985 1987 1989 1991 1993 1995 1997 1999 2001 2003 2005 2007 2009 2011 2013 2015 2017 2018

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Commodities Upside –Reversion to the Mean “Industrial metals appear to have the most potential reversion room, with copper atop the list.” – Mike McGlone, Bloomberg Intelligence Sr. Commodity Strategist, Bloomberg Commodity Outlook August 2018.

Commodity supportCommodity Support

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Mt. Hope – Northern NV District Map

▪ Proximity to multiple large mines provides access to skilled mining work force.

▪ Employees enjoy quality of life provided by outdoor recreational opportunities.

▪ Mt. Hope base metal-silver exploration upside:

▪ Major copper-gold Robinson and Phoenix mines are approximately 80 and 120 road miles, respectively, from Mt. Hope.

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Mt. Hope Equipment Procurement Status (100% basis)

▪ Paid $88M on commitments for $174M in equipment orders

▪ Own or secured with order in place for major milling equipment:

▪ Crusher

▪ SAG mill and ball mill

▪ Mill drives

▪ Roaster equipment

▪ Made $75M order with Caterpillar for haul fleet and support equipment, including 18 250-ton haul trucks i

▪ Secured letter of intent for 4 large loaders and shovels i

▪ Ordered 4 Atlas Copco mine drills i

▪ Outlook: Upon an improvement in the markets and obtaining financing, the Company expects to place orders for remainder of equipment.

i. All orders are cancellable with no further liability. There were non-refundable deposits made of $3.4 million to P&H, $1.2 million to Caterpillar and $0.4 million to Atlas Copco.

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Mt. Hope Supplemental EIS▪ The Record of Decision (“ROD”) for the Mt. Hope Project was initially granted in November,

2012, and subsequently challenged in the U.S. District Court for the District of Nevada by two western U.S. based NGOs ("non-governmental organizations").

▪ The U.S. District Court upheld the ROD in August, 2014. The NGOs appealed the U.S. District Court's Order to the U.S. Court of Appeals for the Ninth Circuit in September, 2014.

▪ On December 28, 2016, the Ninth Circuit issued its Opinion rejecting many of the arguments raised by the NGOs challenging the Environmental Impact Statement ("EIS") issued by the BLM.

▪ The Ninth Circuit reversed on narrow issues related to assumptions made in the baseline air quality analysis and related cumulative impact examination, and whether springs in the area are Public Water Reserves, and, as a result, vacated the ROD.

▪ The BLM, with the Company’s support, has drafted a Supplemental EIS addressing the Ninth Circuit’s concerns and explaining the zero baseline assumption previously used, quantifying cumulative impacts, and addressing the presence of public water reserves.

▪ The Company looks forward to completing the public review requirements in compliance with the National Environmental Policy Act ("NEPA"), and receiving a new ROD for the eventual construction and operation of the Mt. Hope Project in early 2019.

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Mt. Hope Water Rights▪ The Company owns most of the water rights in the Kobeh Valley basin, and is seeking to

change the points of diversion (PODs) and Manner of Use (MOU) of these water rights to facilitate construction of a freshwater supply wellfield to support the Mt. Hope moly project.

▪ Previously, the Nevada State Engineer awarded water permits for the Mt. Hope Project, however, the Nevada Supreme Court on appeal reversed the State Engineer’s decision, and as a result, in September 2017, the permits and associated Monitoring, Management and Mitigation (3M) Plan were vacated.

▪ In 2015 and 2016 the Company filed new applications on existing owned water rights to change the PODs and MOU to support the Mt. Hope Project. In September 2018, the Nevada State Engineer completed a new hearing that began September 11, 2018 to address the Company’s new change applications for water permits. In May 2018, Eureka County and other parties sought to prevent the hearing and filed a Writ Petition with the Nevada Supreme Court.

▪ During the September hearing, the Company reached a Settlement Agreement with Eureka County and the Diamond Natural Resources Protections and Conservation Association (“DNR”) in Nevada that will make a positive impact to the community and resulted in Eureka County and the DNR withdrawing their protest issues regarding the Company’s water rights applications. One protestant representing a Kobeh Valley ranch company refused to participate in the Settlement. (Details are described in the Company’s filings and October 15, 2018 news release.)

▪ The 10-day water hearing with the State Engineer concluded on September 21, 2018. The Company anticipates a decision granting new water permits for the Mt. Hope Project in early 2019. 35

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End Notes 1 and 21. Mt. Hope Project - Slide 17 and NPV Sensitivity Slide 26:

The mine life and economic indicators are based on the updated optional mine plan announced in a February 25, 2014 news release, which reported on an internal study that examined an optimized pit using lower molybdenum prices. The internal study used a $10/lbmolybdenum mine plan and the geologic block model from the Canada National Instrument 43-101 Technical Report Feasibility Study, filed in January 2014 and available on the Company’s website.

Operating data represent the averages over the first five years of production under the optional mine plan. Net Present Value and the Internal Rate of Return use the optional mine plan with a $15.00/lb molybdenum price over 24 years of mining and 30 years of mill processing at an 8% discount rate, after tax. Cash flow is based on the same optional mine plan, except it is undiscounted. The optional mine plan called for mining of 737M tons of ore containing 935M lb of molybdenum and relied on the 2014 Feasibility Study’s proven and probable reserves representing 984.6M tons at an average grade of 0.070% containing 1.4B lb of molybdenum. While the above reserves are in accordance with NI 43-101, they are not recognized as reserves by the U.S. SEC. Refer to the cautionary note to U.S. investors on Slide 2.

As reported in the Company’s Form 10-K for 2017, based on an $8.00/lb molybdenum pit design, Mt. Hope Project has proven and probable reserves of 367.4M tons of ore at an average grade of 0.080% molybdenum. There is also additional mineralized material of 682.5M tons at an average grade of 0.061% molybdenum. The $8.00/lb pit design used to determine reserves and mineralized material was justified on a $10.26/lb of molybdenum price, which is the average of the past four years’ average prices of molybdenum and the future four years’ nominal price estimates for molybdenum by the CPM Group.

2. AMER – Slides 14 and 15:Under the Amended Investment Agreement with AMER, which was most recently amended in August 2017, the Company and AMER

accelerated and closed the Tranche 2 private placement of $6.0 million for 14.6M common shares of General Moly priced at $0.41 per share in October 2017. A sum of $5.5M of the Tranche 2 proceeds was allocated to general corporate purposes and $0.5M were directed to the existing expense reimbursement account to cover costs related to Mt. Hope Project financing and other jointly sourced business development opportunities.

Also in the August 2017 Amended Investment Agreement, the Company and AMER modified the Tranche 3 $10.0M private placement which calls for the purchase of 20.0M common shares amending certain conditions related to completion of Tranche 3. The Tranche 3 private placement for $10.0M of General Moly common shares, priced at $0.50, is conditioned on the receipt of water permits from the Nevada State Engineer or the earlier close of a joint business opportunity involving use of 10.0M shares of General Moly common stock. A sum of $9.5M will be directed to general corporate purposes and $0.5M will be allocated to the expense reimbursement account described above.

The Company received $4M under the Tranche 1 equity investment closed in November 2015 ($2M restricted to fund the expense reimbursement account to fund joint business opportunities and Bank Loan expenses, and $2M for general corporate use). In addition to 13M GMO shares priced at $0.30 per share, AMER also received warrants to purchase 80M shares at an exercise price of $0.50 per share ($40M if fully exercised). These warrants have since been extended to the earlier of the 60-month anniversary of Loan drawdown or 3rd anniversary of the reissuance of the ROD for the Mt. Hope Project. The number of warrants and exercise price were unchanged.

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End Notes 3, 4, and 53. Liberty Project – Slide 24 and NPV Sensitivity Slide 26:

Data are based on the updated Pre-Feasibility Study Technical Report, compliant under Canada National Instrument 43-101, filed in July 2014 and available on the Company’s website.

Operating data represent the averages over the first five years of production. Cash operating costs per pound of molybdenum are estimated using $3.25/lb copper byproduct credits. Net Present Value and Internal Rate of Return use $15/lb molybdenum, $3.25/lbcopper over 31 years of mining, 32 years of milling and an 8% discount rate, after tax. Cash flow is based on the aforementioned, except it is undiscounted.

Measured and indicated resources of 309.2M tons at average grades of 0.078% molybdenum and 0.098% copper contain 482M lb of molybdenum and 606M lb of copper. Liberty reserves, based on $15/lb molybdenum and $3.00/lb copper, are effective as of July 30, 2014. Proven reserves are within 92.5M tons at average grades of 0.101% molybdenum and 0.056% copper while probable reserves are within 216.7M tons at average grades of 0.068% molybdenum and 0.116% copper. While the above reserves are in accordance with NI 43-101, they are not recognized as reserves by the U.S. SEC. Please refer to the cautionary note to U.S. investors on Slide 2.

4. NPV Leverage Chart Slide 25: (Also see End Notes 1 and 3.)Mt. Hope Project NPV breakeven and cash flow breakeven reflect General Moly’s 80% ownership in the project under the optional mineplan, using a $15.00/lb molybdenum price over 24 years of mining and 30 years of mill processing at an 8% discount rate, after tax.

Liberty Project NPV breakeven and cash flow breakeven use $15/lb molybdenum, $3.25/lb copper over 31 years of mining, 32 years of milling and a discount rate of 8%, after tax. There is the potential to increase Liberty’s NPV and IRR by toll roasting Liberty molybdenum concentrates at the Mt. Hope Project once constructed, thereby decreasing total cash costs to $7.41/lb for the first 5 full years of production.

5. Cu-Ag-Zn Exploration Slides 20-23:Any mineral exploitation will require POSCO approval. Given this represents an early-stage copper-silver-zinc exploration program at the Mt. Hope Project, most of the historical data discussed here comes from historical reports and cannot be independently confirmed and lacks the modern standards of quality assurance and controls for samples and assays. Such data may not be relied upon for any evidence or likelihood of a mineral resource, mineral reserve or mineral deposit. The Skarn Area does not contain any mineral resource estimate as defined by Canada National Instrument 43-101 (“NI 43-101”) or any proved or probable reserves as defined by the United States Securities and Exchange Industry Guide 7, nor is there any certainty that further exploration will result in any targets becoming part of a mineral resource or mineral reserve.

Qualified Person’s Statement: The scientific and technical information as related to the 3D IP survey results and the copper-silver-zinc exploration program was reviewed by Mark W. Osterberg, Principal Consulting Geologist of Mine Mappers, LLC. Dr. Osterberg is a “qualified person” as defined by NI 43-101. He is a Professional Geologist, with master’s and doctorate degrees in geology. He has extensive minerals industry experience that is relevant to the evaluation of the style and nature of mineralization described herein.

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Board of Directors

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▪ Managing Director of the minerals capital and advisory practice of Capstone Headwaters and an international natural resources banker for more than 35 years.

▪ Also a director of Endeavour Silver and Forsys Metals.

▪ Previously served in multiple executive roles at Newmont, including Chief Financial Officer and Senior VP, Operations Services & Development, and was Senior VP, Corporate Development for Santa Fe Pacific Gold. Executed numerous financings and M&A transactions.

▪ Also a director of Energy Fuels and ASA Gold and Precious Metals.

▪ Retired as Chief Financial Officer of Apex Silver Mines and previously served senior financial positions with Cyprus Amax, AMAX and Amax.

Mike IannacchioneVP & GM Mt. Hope

Mark LettesDirector

Bruce HansenDirector, CEO and CFO of

General Moly

Ricardo CampoyChairman & Lead

Independent Director

▪ Retired as President, Chief Executive Officer, and a Director of Frontera Copper and previously served as Senior Vice President of South American Operations for Phelps Dodge Mining.

Gary LovingDirector

▪ Former Partner of KPMG and previously served as global director of Arthur Andersen’s mining industry practice.

▪ Also a member of the Board of Managers of Jonah Energy Holdings and Discovery DJ Holdings.

Gregory RaihDirector

▪ AMER International Group’s nominee director; Chairman of the Overseas Investment Committee and CEO of the International Business Group at AMER.

Tong ZhangDirector

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Experienced Management Team

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▪ CEO and a Director since 2007.

▪ Previously served in multiple executive roles at Newmont, including Chief Financial Officer and Senior VP, Operations Services & Development, and was Senior VP, Corporate Development for Santa Fe Pacific Gold. Executed numerous financings and M&A transactions.

▪ COO since 2012; joined in 2007 as VP Engineering & Construction.

▪ Over 35 years in mine operations, project engineering and construction. Previously served as general manager of Phelps Dodge’s Morenci Mine, one of the largest open-pit/concentrator operations in the world.

▪ Chief Legal Officer since 2015; joined in 2010 as VP HR and Corporate Counsel. ▪ Formerly served as General Counsel and Executive Vice President of Law and Human

Resources at Flatiron Financial Services and as in-house counsel for Qwest and US West. Financing and corporate deal experience, including cross-border transactions.

▪ Manager of Engineering and Development since 2008.

▪ Over 38 years of industry experience. Previously worked for Rio Tinto, Phelps Dodge and Freeport-McMoRan in operations, technical services, research and development, project management and M&A.

Mike IannacchioneVP & GM Mt. Hope

Chuck MaxwellManager Engineering &

Development

Scott RoswellChief Legal Officer & VP HR

Bob Pennington Chief Operating Officer

Bruce HansenChief Executive Officer &

Chief Financial Officer

▪ Vice President of Permitting and Environmental Compliance since joining in 2006.

▪ More than 25 years industry experience, including extensive work in Nevada Previously served as Operations Environmental Permitting Manager with Newmont

Pat RogersVP Permit. & Envir. Comp.

▪ Recently appointed Principal Accounting Officer; Controller since 2016. Joined 2008.

▪ Previously served in audit at KPMG. CPA since 2009 and has a Chartered Global Mgt. Accountant certificate from the American Inst. of Certified Public Accountants.

Amanda CorrionPrincipal Accnt. Officer &

Controller

▪ Admin. Services Manager since 2012.

▪ CPA since 2005 and former long-time Controller and Supply Chain Director of Nevada operations for Newmont. Prior finance and accounting roles at Lockheed Aircraft and Red Lion Inn and Casino.

Alan LondonAdmin. Services Manager

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General Moly Contacts

Headquarters

Lakewood, Colorado

(303) 928-8599

www.generalmoly.com

Bruce D. Hansen

Chief Executive Officer

bhansen@generalmoly.com

General Moly launched the Moly Bits blog byCEO Bruce Hansen in 2017. Sign up to receivecommentaries about the molybdenum market.You may unsubscribe at any time:http://www.generalmoly.com/molybits.php

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