Exhibit 99.1

Janus Investment Fund ("JIF")

Lipper Rankings Based on Total Returns as of 12/31/091-Year

3-Year

5-Year

10-Year

Since PM InceptionPM
Inception

Lipper Category

Percentile
Rank (%)

Rank/
Total Funds

Percentile
Rank (%)

Rank/
Total Funds

Percentile
Rank (%)

Rank/
Total Funds

Percentile
Rank (%)

Rank/
Total Funds

Percentile
Rank (%)

Rank/
Total FundsGrowth Funds  Share ClassJanus Twenty Fund  J(1)


Dec-07

Large-Cap Growth Funds


14


111 / 814


1


2 / 702


1


3 / 582


41


127 / 310


38


286 / 766Janus Fund  J


Oct-07

Large-Cap Growth Funds


36


290 / 814


35


246 / 702


27


154 / 582


67


207 / 310


40


301 / 754Janus Forty Fund -S


Dec-07

Large-Cap Growth Funds


13


105 / 814


3


17 / 702


1


4 / 582


7


19 / 310


53


404 / 766Janus Orion Fund  J


Dec-07

Multi-Cap Growth Funds


8


36 / 459


16


57 / 378


3


9 / 310








57


238 / 418Janus Research Fund  J


Jan-06

Large-Cap Growth Funds


16


124 / 814


17


117 / 702


14


78 / 582


76


235 / 310


12


77 / 652Janus Enterprise Fund  J


Oct-07

Mid-Cap Growth Funds


41


191 / 474


25


103 / 425


14


47 / 353


93


166 / 178


26


115 / 448Janus Venture Fund  J(1)


Jan-97

Small-Cap Growth Funds


7


36 / 540


47


220 / 472


30


116 / 397


84


181 / 217


20


25 / 125Janus Triton Fund  J


Jun-06

Small-Cap Growth Funds


10


53 / 540


2


9 / 472














1


4 / 450INTECH RM Growth Fund  S


Jan-03

Multi-Cap Growth Funds


62


283 / 459


76


285 / 378


82


252 / 310








82


227 / 279Core Funds  Share ClassJanus Growth and Income Fund  J


Nov-07

Large-Cap Core Funds


7


60 / 906


40


304 / 773


37


240 / 653


68


252 / 374


48


388 / 820Janus Contrarian Fund  J


Feb-00

Multi-Cap Core Funds


22


170 / 795


46


308 / 683


6


29 / 519








17


37 / 227Janus Balanced Fund  J


Apr-05

Mixed-Asset Target Alloc. Mod. Funds


43


219 / 509


1


1 / 412


1


1 / 311


19


28 / 148


1


1 / 338Janus Research Core Fund  J


Nov-07

Large-Cap Core Funds


9


74 / 906


40


302 / 773


15


98 / 653


35


129 / 374


57


466 / 820INTECH RM Core Fund  J


Feb-03

Multi-Cap Core Funds


83


656 / 795


68


464 / 683


60


312 / 519








48


182 / 386Global/International Funds  Share ClassJanus Overseas Fund  J


Jun-03

International Funds


1


2 / 1275


1


7 / 975


1


1 / 700


13


48 / 386


1


1 / 611Janus Worldwide Fund  J


Apr-09

Global Funds


27


142 / 544


64


239 / 378


74


211 / 287


96


137 / 143


Janus Global Technology Fund  J


Jan-06

Global Science/Technology Funds


65


50 / 77


33


21 / 64


26


15 / 58


90


18 / 19


43


27 / 63Janus Global Life Sciences Fund  J


Apr-07

Global Health/Biotechnology Funds


18


8 / 45


8


3 / 41


33


12 / 36


79


15 / 18


10


4 / 42Janus Global Research Fund  J


Feb-05

Global Funds


12


65 / 544


10


36 / 378














4


11 / 292Janus Global Opportunities Fund  J


Apr-05

Global Funds


49


266 / 544


33


122 / 378


65


185 / 287








65


201 / 313Janus International Equity Fund  I


Nov-06

International Funds


5


55 / 1275


2


14 / 975














2


14 / 937INTECH RM International Fund  I


May-07

International Funds


80


1019 / 1275




















54


551 / 1025Janus International Forty Fund  I


May-08

International Funds


1


7 / 1275




















27


310 / 1154Value Funds  Share ClassPerkins Mid Cap Value Fund  J


Aug-98

Mid-Cap Value Funds


76


191 / 251


6


11 / 210


5


8 / 161


4


2 / 61


3


1 / 48Perkins Small Cap Value Fund  J(1)


Feb-97

Small-Cap Core Funds


27


198 / 756


1


6 / 631


4


18 / 522


12


32 / 269


4


5 / 128INTECH RM Value Fund  I


Dec-05

Multi-Cap Value Funds


83


292 / 351


54


153 / 285














54


133 / 249Perkins Large Cap Value Fund  I


Dec-08

Large-Cap Value Funds


31


160 / 527




















31


160 / 527Income Funds  Share ClassJanus Flexible Bond Fund  J


May-07

Intermediate Investment Grade Debt Funds


52


285 / 549


6


25 / 458


7


24 / 395


18


39 / 219


7


30 / 477Janus Short-Term Bond Fund  J


May-07

Short Investment Grade Debt Funds


59


144 / 246


2


4 / 223


2


3 / 176


13


12 / 94


3


6 / 231Janus High-Yield Fund  J


Dec-03

High Current Yield Funds


76


347 / 459


25


98 / 391


17


56 / 341


16


33 / 207


23


70 / 313Alternative Funds  Share ClassJanus Long/Short Fund  I


Aug-06

Long/Short Equity Funds


85


104 / 122


40


22 / 54














26


11 / 42Janus Global Real Estate Fund  I


Nov-07

Global Real Estate Funds


3


2 / 80




















2


1 / 67Asset Allocation Funds  Share ClassJanus SP-Growth  J


Dec-05

Mixed-Asset Targe Alloc. Growth Funds


7


43 / 649


6


32 / 549














3


13 / 497Janus SP-Moderate  J


Dec-05

Mixed-Asset Target Alloc. Mod Funds


10


49 / 509


1


3 / 412














2


6 / 369Janus SP-Conservative  J


Dec-05

Mixed-Asset Targe Alloc. Cons Funds


22


97 / 441


4


13 / 361














2


5 / 304Janus Modular Portfolio Construction Fund  I


Sep-08

Mixed-Asset Targe Alloc. Growth Funds


27


172 / 649




















44


276 / 636


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---

Data presented reflects past performance, which is no guarantee of future results.Lipper, a wholly-owned subsidiary of Thomson Reuters, provides independent insight on global collective investments including mutual funds, retirement funds, hedge funds, fund fees and expenses to the asset management and media communities. Lipper
ranks the performance of mutual funds within a classification of funds that have similar investment objectives. Rankings are historical with capital gains and dividends reinvested and do not include the effect of loads. If an expense waiver was in
effect, it may have had a material effect on the total return or yield for the period.Notes:(1)

Closed to new investors.

In accordance with FINRA regulations, Lipper rankings cannot be publicly disclosed for time periods of less than one year.


---





Janus Aspen Series ("JAS") Institutional Shares

Lipper Rankings Based on Total Returns as of 12/31/091-Year

3-Year

5-Year

10-Year

Since PM InceptionPM
Inception

Lipper Category

Percentile
Rank (%)

Rank/
Total Funds

Percentile
Rank (%)

Rank/
Total Funds

Percentile
Rank (%)

Rank/
Total Funds

Percentile
Rank (%)

Rank/
Total Funds

Percentile
Rank (%)

Rank/
Total FundsGrowth FundsForty Portfolio


Oct-07

Large-Cap Growth


58


131 / 228


36


73 / 207


33


63 / 191


60


51 / 85


40


84 / 214Janus Portfolio


Dec-07

Large-Cap Growth


10


21 / 228


1


1 / 207


2


3 / 191


12


10 / 85


52


114 / 219Enterprise Portfolio


Oct-07

Multi-Cap Growth


29


34 / 120


40


40 / 101


22


19 / 87


78


31 / 39


34


36 / 105Core FundsBalanced Portfolio


Apr-05

Mixed-Asset Target Alloc Moderate


28


49 / 179


1


1 / 122


2


1 / 81


25


12 / 48


2


1 / 93Growth and Income Portfolio


Nov-07

Large-Cap Core


4


9 / 225


19


39 / 210


22


39 / 181


67


62 / 92


21


43 / 213Fundamental Equity Portfolio


Nov-07

Large-Cap Core


10


22 / 225


23


47 / 210


15


26 / 181


32


29 / 92


51


108 / 213Global/International FundsWorldwide Growth Portfolio


Apr-09

Global


39


53 / 135


58


57 / 98


83


62 / 74


86


36 / 41


International Growth Portfolio


Jun-03

International


1


1 / 274


1


2 / 227


1


1 / 195


7


7 / 99


1


1 / 179Global Life Sciences Portfolio


Jan-06

Science & Technology


55


31 / 56


34


18 / 53


25


13 / 51








34


18 / 53Global Technology Portfolio


Oct-04

Health/Biotechnology


39


14 / 35


9


3 / 34


24


7 / 29








17


5 / 29Value FundsPerkins Mid Cap Value Portfolio


May-03

Multi-Cap Core


28


64 / 233


2


3 / 187


2


2 / 126








1


1 / 104Income FundsFlexible Bond Portfolio


May-07

Intermediate Investment Grade Debt


44


33 / 75


15


10 / 67


19


11 / 60


17


5 / 30


14


9 / 68


---

Rankings are for the Institutional Shares only; other classes may have different performance characteristics.

Data presented reflects past performance, which is no guarantee of future
results.

Lipper, a wholly-owned subsidiary of Thomson Reuters, provides independent insight on global collective investments
including mutual funds, retirement funds, hedge funds, fund fees and expenses to the asset management and media communities. Lipper ranks the performance of mutual funds within a classification of
funds that have similar investment objectives. Rankings are historical with capital gains and dividends reinvested and do not include the effect of loads. If an expense waiver was in effect, it may
have had a material effect on the total return or yield for the period.

Note:

---