Siliconware Precision Industries Co., Ltd.

First Quarter 2018

Operating Results

Apr. 24, 2018

1

3Q 16 2

Safe Harbor Statements

The information herein contains forward-looking statements. We have based these forward-looking statements on our current expectations and projections about future events. Although we believe that these expectations and projections are reasonable, such forward-looking statements are inherently subject to risks, uncertainties and assumptions about us, including, among other things:

the intensely competitive personal computer, communications, consumer ICs and non-commodity memory semiconductor industries and markets;

cyclical nature of the semiconductor industry;

risks associated with global business activities;

non-operating losses due to poor financial performance of some of our investments;

our dependence on key personnel;

general economic and political conditions;

possible disruptions in commercial activities caused by natural and human induced disaster, including terrorist activities and armed conflicts and contagious disease, such as the Severe Acute Respiratory Syndrome;

fluctuations in foreign currency exchange rates; and

other risks identified in our annual report for the year ended December 31, 2017 on Form 20-F filed with the U.S. Securities andExchange Commission on Mar. 27, 2018.

The words “anticipate,” “believe,” “estimate,” “expect,” “intend,” “plan” and similar expressions, as they relate to us, are intended to identify a number of these forward-looking statements. We undertake no obligation to update or revise any forward-looking statements whether as a result of new information, future events or otherwise. In light of these risks, uncertainties and assumptions, the forward-looking events discussed herein might not occur and our actual results could differ materially from those anticipated in these forward-looking statements.

All financial figures discussed herein are prepared under T-IFRS on a consolidated basis. The investment gains or losses of our company for the three months ended Mar 31, 2018 reflect our gains or losses attributable to the first quarter of 2018 unaudited financial results of several of our investments (the “Investees”) which are evaluated under the equity method. The consolidated financial data for our company for the three months ended Mar 31, 2018 is not necessarily indicative of the results that may be expected for any period thereafter.

1Q 18

3Q 16 3

1Q 2018 Consolidated Operating

Results Summary (unaudited)

1Q 18

Amount: NT$Million 1Q 2018 4Q 2017 1Q 2017

Amount Amount Amount

Net Revenues 18,913 21,623 19,552

Net Income Attributable to

Shareholders of the Parent 240 1,489 997

EPS (NT$)-Basic 0.08 0.48 0.32

EPS (NT$)-Diluted 0.08 0.48 0.15

ADS (US$)-Basic 0.01 0.08 0.05

ADS (US$)-Diluted 0.01 0.08 0.02

Depreciation 3,830 3,800 3,392

Capital Expenditure 2,277 2,306 3,337

EBITDA* 5,036 6,161 5,201

ROE(%)* 1.5% 8.8% 6.0%

*EBITDA= operating income + depreciation & amortization expenses

*Annualized ROE for the quarter

3Q 16 4

1Q 2018 Statement of Comprehensive

Income-QoQ & YoY Comparison (unaudited)

1Q 18

Amount: NT$Million 1Q 2018 4Q 2017 1Q 2017

Actual Actual Actual

Revenues 18,913 21,623 19,552 -12.5% -3.3%

Gross Profit 2,995 4,485 3,757 -33.2% -20.3%

Gross Margin 15.8% 20.7% 19.2% -4.9ppts -3.4ppts

Operating Expense (1,824) (2,165) (2,017) -15.8% -9.6%

Operating profits 1,171 2,320 1,740 -49.5% -32.7%

Operating Margin 6.2% 10.7% 8.9% -4.5ppts -2.7ppts

Non-operating Items (736) (389) (478) -89.3% -53.9%

Income tax (171) (442) (265) -61.4% -35.6%

Net Income 264 1,489 997 -82.2% -73.5%

Net Profit Margin 1.4% 6.9% 5.1% -5.5ppts -3.7ppts

Noncontrolling Interest 24 - - － －

Net Income Attributable to

Shareholders of the Parent240 1,489 997 -83.9% -75.9%

Earnings Per Ordinary

Shares-Basic NT$ 0.08 NT$ 0.48 NT$ 0.32

Earnings Per Ordinary

Shares-Diluted NT$ 0.08 NT$ 0.48 NT$ 0.15

1Q18

over

4Q17

1Q18

over

1Q17

3Q 16 5

Consolidated Balance Sheet Highlight - Mar, 2018 (unaudited)

1Q 18

Mar, 2018 % Dec, 2017 % Mar, 2017 %

Cash and Cash Equivalents 31,361 25 24,444 20 23,611 19

Long-term Investments 6,856 5 7,068 5 6,874 5

Property, plant, equipment 63,012 50 62,398 52 65,962 54

Total Assets 127,064 100 120,887 100 122,302 100

Bonds Payable 11,266 9 12,015 10 12,029 10

Long-term Loan 11,728 9 12,667 11 15,340 13

Total equity

(Including non-controlling interest)74,054 58 68,320 57 67,394 55

Depreciation-YTD 3,830 14,416 3,392

Capital Expenditure-YTD 2,277 12,933 3,337

EBITDA*-YTD 5,036 23,300 5,201

*EBITDA= operating income+ depreciation & amortization expenses

Amount: NT$ MillionActual

3Q 16

Consolidated Revenue, GM and OPM

-Mar, 2018

NT$ Million

$19,299

$21,680$21,955 $22,178

$19,552$20,425

$21,955

$18,913

$21,623

20.6%23.5%

23.0%23.6%

19.2%18.4%

20.7%21.9%

9.8%

13.3% 13.6% 13.7%

8.9% 9.2%

12.5%

10.7%

6.2%

0%

5%

10%

15%

20%

25%

30%

0

5,000

10,000

15,000

20,000

25,000

Q1'16 Q2'16 Q3'16 Q4'16 Q1'17 Q2'17 Q3'17 Q4'17 Q1'18

Revenue Gross Margin Operating Margin

15.8%

1Q 18 6

3Q 16 7

Sales Breakdown by Geography

1Q 18 4Q 17

Note：Statistics by end customer operational headquarter

1Q 18

3Q 16 8

Sales Breakdown by Customer

4Q 171Q 18

1Q 18

3Q 16 9

Sales Breakdown by Application

4Q 171Q 18

1Q 18 9

3Q 16 10

Sales Breakdown by Packaging Type

1Q 18 4Q 17

1Q 18 10

3Q 16 11

Capacity by Different Process

1Q 18

Capacity 1Q 18 4Q 17 unit

Wirebonder 8,731 8,207 set

Bumping

--8" wafer 128 121 k/M

--12" wafer 195 195 k/M

Flip Chip 163 149 kk/M

WLCSP 163 163 kk/M

SIP 3 3 kk/M

Tester 589 574 set

Note : Estimated by equivalent production unit

http://www.spil.com.tw

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