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Actualize III-V Semiconductor Potential

Safe Harbor Notice 2

These presentation materials include forward-looking statements that are subject to significant risks and uncertainties and actual results may differ materially from those contained in the forward-looking statements.

The factors that could cause actual results including, but not limited to current uncertainty in global market conditions, our development in new technologies and products, our ability to lower costs, the complexity of our manufacturing processes, the availability of raw materials, and the difficulties of estimating future market demand.

Our industry and business are constantly evolving and we undertaking no obligation to update any forward-looking statements, whether as a result of new information, future events, or otherwise.

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Quick Glance at Epistar

Founded ︰September 1996

Chairman︰Dr. B. J. Lee

President︰Mr. Patrick Fan

Paid-in Capital︰NTD 10.9 Billions (~ US$ 373 M)

Products︰

– AlGaInP LED EPI-wafers and chips

– InGaN LED EPI-wafers and chips

– UV / Infrared LED chips

– VCSEL Foundry Services

– III-V solar cells

Employee︰3,458 staff (update: May, 2019)

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Corporate Achievement

History & Milestones

1996

Sep. 1996

Established in

Hsinchu Science Park

2001

May 2001 IPO listing on the Taiwan Stock Exchange

2005

Dec. 2005

Merged with UEC

2007

Mar. 2007 Merged with Epitech & Highlink

2010

Nov. 2010 JV with TOYODA GOSEI

2012

Dec. 2012 Cooperate with HUGA

2015

Mar. 2015

Merged with TSMCSSL

Aug. 2015

Patent cross-license agreement with CREE

2014

Feb. 2014 Patent cross-license agreement with PHILIPS

Dec. 2014

Acquired FOREPI

2019

Jan 2019

Yenrich provide mini LED solution

2016

Sep. 2016

Merged with FOREPI & HUGA

2018

Oct. 2018

Spin-off Unikorn

Market Overview and Outlook 5

The overall industry still oversupply in the first half of 2019

Inventories rise substantially among China peers, price-cut and utilization adjustment are inevitable

Inventories rise substantially among China peers, production cutting and digesting inventory for

operating cash inflow

Players lacking cost-competiveness or product-differentiation could face Industry shakeout

Expected Mini LED will increase from the last half of 2019

EPISTAR 2.0 6

Actualize LED Potential

Actualize III-V Semiconductor Potential

延伸至三五族半導體的應用 7

LED • Illumination •Signals •Automotive •Mobile Application ......

Laser Diodes •Optical Storage • Industry Medical •Projector •Fiber commutation ……

Power PFC / Power/Supply PV Inverter/ EV / HEV/UPS …….

RF Electronic 5G Wireless charge ……

BAW Device Mobile Phone ……

Acoustic wave

EPISTAR Group 8

Yenrich Technology Co.

EPISTAR Group

Unikorn Semiconductor Co. Epistar Corporation

LED / LD Business Foundry Business Component / Module Business

• AlGaInP & AlGaAs LED

• InGaN LED

• Long wavelength LED & LD

• Solar cell

• VCSEL

• Power Electronics(GaN/Si)

• RF

• BAW

• CSP

• Mini, Micro-LED

• Sensor

New Growth Engines 9

Future Display (Mini-LED/Micro-LED)

New Generation Smart Car – GaN Power/LiDAR

IoT –/Sensor/Power Module

5G World – Solar Cell/BAW….

3D Sensing, VR/AR – VCSEL

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Balance Sheets

(In NT billions excepted otherwise noted)

　 Cash & Marketable Securities 6.1 9.7% 6.3 10.0% 5.5 8.3%

　 Accounts Receivable 9.7 15.5% 10.4 16.6% 11.4 17.2%

　 Inventory 4.2 6.7% 4.7 7.5% 5.4 8.1%

　 Long-Term Investment 1.1 1.8% 1.1 1.8% 2.6 3.9%

　 Net PP&E 22.0 35.1% 22.4 35.7% 24.0 36.2%

Total Assets 62.7 100.0% 62.7 100.0% 66.3 100.0%

　 Current Liabilities 8.6 13.7% 9.1 14.5% 9.4 14.2%

　 Long-Term Interest-bearing Debt 0.1 0.2% 0.4 0.6% 0.7 1.1%

Total Liabilities 12.4 19.8% 11.8 18.8% 12.4 18.7%

Total Shareholders’ Equity 50.3 80.2% 50.9 81.2% 53.9 81.3%

2018.12.31 2018.03.312019.03.31

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2019 1Q Income QoQ Comparison

(In NT millions except otherwise noted)

Sales revenue 3,753 100.0% 4,216 100.0% (463) (11.0%)

Gross loss (423) (11.3%) (185) (4.4%) 238 128.6%

Operating expenses (830) (22.1%) (868) (20.6%) (38) (4.4%)

Net other income and expenses 40 1.1% 69 1.6% (29) (42.0%)

Operating loss (1,213) (32.3%) (984) (23.3%) 229 23.3%

Net currency exchange gains 43 1.1% 42 1.0% 1 2.4%

Interest expense (37) (1.0%) (36) (0.9%) 1 3.0%

Other net non-operating income (expenses) 64 1.7% (237) (5.6%) 301 127.0%

Loss before income tax (1,143) (30.5%) (1,216) (28.8%) (73) (6.0%)

Loss for the period (1,130) (30.1%) (1,005) (23.8%) 125 12.4%

Basic loss per share(NT$) 0.13 14.2%

QoQ

(1.03) (0.90)

1Q19 4Q18

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2019 Income YoY Comparison

(In NT millions except otherwise noted)

Sales revenue 3,753 100.0% 5,148 100.0% (1,395) (27.1%)

Gross profit (loss) (423) (11.3%) 886 17.2% 1,309 147.7%

Operating expenses (830) (22.1%) (812) (15.8%) 18 2.2%

Net other income and expenses 40 1.1% 53 1.0% (13) (24.5%)

Operating profit (loss) (1,213) (32.3%) 127 2.5% 1,340 1055.1%

Net currency exchange (loss)gains 43 1.1% (44) (0.9%) 87 197.7%

Interest expense (37) (1.0%) (41) (0.8%) (4) (9.8%)

Other net non-operating income 64 1.7% 65 1.3% (1) (1.5%)

Profit (loss) before income tax (1,143) (30.5%) 107 2.1% 1,250 1168.2%

Profit (loss) for the period (1,130) (30.1%) 378 7.3% 1,508 398.9%

Basic earnings (loss) per share(NT$) 1.40 378.4%

YoY

(1.03) 0.37

2019 1Q 2018 1Q