2012 Investor Overview JEFF LUNSFORD CHAIRMAN AND CEO

DOUG LINDROTH CHIEF FINANCIAL OFFICER

Safe Harbor Statement

Certain statements in this presentation relate to future results that are forward-looking statements as defined in the Private Securities Litigation Reform Act of 1995. This presentation contains statements involving risks and uncertainties, including statements relating to Limelight Networks’ market opportunity and future business prospects. Actual results may differ materially and reported results should not be considered as an indication of future performance. Factors that could cause actual results to differ are included in Limelight Networks’ Annual Report on Form10K and Form 10Q.

Proportion of Total U.S. Internet Traffic 1995 2010

Mobile  

Macro Trends…

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Online  

More  than  ½  of  US  consumers  watched  video  content  online  at  least  monthly  in  2011  

1  billon  smart-‐phones  by  2013  and  mobile  data  traffic  will  globally  increase  26  Cmes  by  2015,  to  6.3  exabytes  per  month  

Sources:  Tier  1,  Forrester  Research,  eMarketer,  ABI  Research,  Apple,  Cisco,  Google,  Palm,  RIM,    Parks  Associates,  IDC,  Accustream  Research,  Gartner  Group,  In-‐Stat.  All  numbers  rounded.  

Cloud  Storage  to  reach  $12  billion  in  2014.    SaaS  for  enterprise  applicaCons  surpassed$10  billion  in  2012    

   

Cloud  Social  

500+  million  users  on  TwiWer  800+  million  on  Facebook  (350  million  acCve)    

Sao  Paulo  Johannesburg  

Tel  Aviv  

Chennai  

•  7+  Tbps  egress  capacity  •  2.5  billion  objects  delivered  hourly  •  15  petabytes  of  cloud  storage  •  80+  points  of  presence  (POPs)  

•  15,000+  high-‐performance  servers  •  Direct-‐connected  to  600+  ISPs  •  2  million  server  compute  capacity  

Dusseldorf  Vienna  

Limelight  Networks  Global  Delivery  Plaaorm  

Traffic Growth

Q1  07  

Q2  07  

Q3  07  

Q4  07  

Q1  08  

Q2  08  

Q3  08  

Q4  08  

Q1  09  

Q2  09  

Q3  09  

Q4  09  

Q1  10  

Q2  10  

Q3  10  

Q4  10  

Q1  11  

Q2  11  

Q3  11  

Q4  11  

Q1  12  

Q2  12  

Q3  12  

E-‐Commerce  HealthCare   Services  &  Other  

Media  &  Entertainment  High  Tech   Financial  Services   Manufacturing  

Public  Sector  

Worldwide  Customers  

•  A  variety  of  systems  to  publish,  manage,  and  extend  the  digital  presence  as  part  of  a  workflow  

•  LiWle  to  no  integraCon  between  systems  

•  Require  significant  in-‐house  experCse  to  install,  upgrade,  and  manage  

•  Result  is  a  focus  on  process  and  content  

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Growing  Complexity  of  Managing  A  Digital  Presence  

•  SaaS        

•  PaaS  (Storage  &  Compute)    

•  Plaaorm   COMPUTE  

“Cloud”  Triad  

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Strategy

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Limelight Orchestrate

Limelight Video Platform

Acquire Transcode Store Manage Monetize Deliver Report

"   Cloud-based software-as-a-service for publishing and monetizing video content on a website.

"   Encapsulates Limelight media delivery services in a single workflow and login "   Enables customers of all sizes and business complexity to leverage Limelight’s video

delivery service

"   Robust programming interfaces, flexible architecture, and patent-pending innovations

Limelight Content Management

"   Cloud-based software-as-a-service for publishing web content globally, tracking visitor experiences, and implement branding, social media, and demand generation campaigns

"   Enables online publishers and enterprise marketers to engage with visitors across multiple channels and devices.

"   Encapsulates Limelight web and application acceleration services in a single workflow

Create Manage Publish Serve Interact Measure Adapt

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Limelight Deliver

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Limelight Deliver

Agile Storage

Revenue History

$-

$20

$40

$60

$80

$100

$120

$140

$160

$180

$200

2004 2005 2006 2007 2008 2009 2010 2011 2012

$11 $21

$65

$106 $130 $132

$154 $171

$182

Consen

sus  

Value-Added Services as Percent of Revenue

50% of $400M target model at 70-80% GM

0%

5%

10%

15%

20%

25%

30%

35%

Q1 08

Q2 08

Q3 08

Q4 08

Q1 09

Q2 09

Q3 09

Q4 09

Q1 10

Q2 10

Q3 10

Q4 10

Q1 11

Q2 11

Q3 11

Q4 11

Q1 12

Q2 12

Q3 12

6% 6% 9%

7% 10%

11% 11% 13%

14% 15% 18% 18%

20%

27% 29% 29%

31% 32% 35%

Costs are represented without stock-based compensation and without litigation costs and acquisition-related expenses

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Target Model Year  Ended  12/31/2011  

QTR  Ended  9/30/2012  

Target  Model  (EsCmated)  

EBITDA  Margin  Pickup  EsCmated)  

Revenue  ($  in  millions)   $171.3   $45.0   $400  

Gross  Margins   37%   38%   56%  

Cash  Gross  Margin   54%   54%   68%   14%  

S&M   21%   23%   20%   3%  

R&D   8%   10%   6%   4%  

G&A  (without  liCgaCon)   14%   16%   9%   7%  

Adj.  EBITDA  Margin   11%   6%   33%   27%  

Capital  Expenditures   18%   16%   15%  

Financial Trends (in Millions)

Gross margin and cash gross margin are represented without stock-based compensation

v  

v  

v  

v  

Revenue CGM

GM Adj. EBITDA Margin

0

5

10

15

20

25

30

35

40

45

Q1 08 Q2 08 Q3 08 Q4 08 Q1 09 Q2 09 Q3 09 Q4 09 Q1 10 Q2 10 Q3 10 Q4 10 Q1 11 Q2 11 Q3 11 Q4 11 Q1 12 Q2 12 Q3 12

30.2 30.3 33.1

35.9 33.2 32.3 32.5 33.6

35.7 35.6

40.0 43.0

41.4 41.6 42.4 46.0 44.3 44.4

45.0

75%

65%

55%

45%

35%

25%

15%

5%

33%

53%

13%

37%

57%

15%

37%

57%

13%

41%

60%

14%

37%

56%

18%

37%

56%

18%

38%

56%

10%

36%

52%

15%

43%

56%

14%

40%

55%

7%

15%

39%

54% 54%

39%

15%

54%

38%

12%

51%

33%

8%

53%

37%

8%

56%

41%

14%

55%

39%

5%

54%

38%

6% 6%

39%

54%

Key Success Metrics

"  Traction with high-value SaaS offerings in Mobile, OVP and Web Content Management

"  Traction with differentiated VAS offerings for Acceleration and Cloud Storage (PaaS) in the Enterprise

"  Gross margin expansion as VAS grows as percent of revenue

"  CDN scale and performance serving as platform for the above.

Thank You

Q&A