PRIMECAP Aggr Growth Fund 12.31.17 - Odyssey …

1 PRIMECAP Odyssey Aggressive Growth FundPortfolio HoldingsDecember 31, 2017 (Unaudited)Common StockSectorsCUSIPD escriptionSharesMarket ValueHealth Care - , INC. 2,066,300 $ 102,323,176 002824100 ABBOTT LABORATORIES 1,503,300 85,793,331 003654100 ABIOMED, INC. 1,761,873 330,192,619 004397105 ACCURAY, INC. 1,650,600 7,097,580 00773U108 ADVERUM BIOTECHNOLOGIES, INC. 472,100 1,652,350 G01767105 ALKERMES PLC 5,980,822 327,330,388 03879J100 ARBUTUS BIOPHARMA CORP. 4,000,400 20,202,020 G0750W104 AXOVANT SCIENCES LTD.

2 2,208,000 11,636,160 07725L102 BEIGENE LTD. - ADR 261,362 25,540,295 09062X103 BIOGEN, INC. 284,500 90,633,165 09061G101 BIOMARIN PHARMACEUTICAL, INC. 1,276,265 113,804,550 09075E100 BIOVERATIV, INC. 142,250 7,670,120 101137107 BOSTON SCIENTIFIC CORP. 245,000 6,073,550 157085101 CERUS CORP. 7,800,000 26,364,000 159864107 CHARLES RIVER LABORATORIES INTERNATIONAL, INC. 17,000 1,860,650 252366109 DEXTERA SURGICAL, INC. 530,650 25,471 532457108 ELI LILLY & CO.

3 1,788,800 151,082,048 29428V104 EPIZYME, INC. 4,374,484 54,899,774 30063P105 EXACT SCIENCES CORP. 3,067,900 161,187,466 33938A105 FLEX PHARMA, INC. 1,459,631 5,094,112 34385P108 FLUIDIGM CORP. 3,850,032 22,676,688 377322102 GLAUKOS CORP. 59,210 1,518,737 452327109 ILLUMINA, INC. 113,000 24,689,370 45253H101 IMMUNOGEN, INC. 325,000 2,083,250 45784P101 INSULET CORP. 1,964,956 135,581,964 60877T100 MOMENTA PHARMACEUTICALS, INC.

4 1,792,583 25,006,533 640268108 NEKTAR THERAPEUTICS 13,079,430 781,103,560 670704105 NUVASIVE, INC. 490,000 28,660,100 68234X102 ONCOMED PHARMACEUTICALS, INC. 3,762,300 15,425,430 68554V108 ORASURE TECHNOLOGIES, INC. 943,400 17,792,524 70975L107 PENUMBRA, INC. 14,600 1,373,860 717071104 PFENEX, INC. 2,297,100 6,110,286 N72482123 QIAGEN 4,135,573 127,913,273 CH0012032048 ROCHE HOLDING AG - CHF 307,900 77,887,372 812578102 SEATTLE GENETICS, INC.

5 3,809,400 203,802,900 84763A108 SPECTRUM PHARMACEUTICALS, INC. 4,303,200 81,545,640 98401F105 XENCOR, INC. 4,691,782 102,843,861 3,186,478,173 Information Technology - SYSTEMS, INC. 880,900 154,368,916 01609W102 ALIBABA GROUP HOLDING LTD. - ADR 908,850 156,713,005 02079K305 ALPHABET, INC. - CLASS A 103,370 108,889,958 02079K107 ALPHABET, INC. - CLASS C 103,637 108,445,757 040413106 ARISTA NETWORKS, INC. 1,500 353,370 N07059210 ASML HOLDING 135,700 23,587,374 054540208 AXCELIS TECHNOLOGIES, INC.

6 2,639,500 75,753,650 068323104 BARRACUDA NETWORKS, INC. 720,000 19,800,000 09228F103 BLACKBERRY LTD. 23,223,918 259,411,164 20564W105 COMSCORE, INC. 5,143,160 146,580,060 225223304 CRAY, INC. 163,000 3,944,600 225447101 CREE, INC. 1,675,300 62,220,642 24703L103 DELL TECHNOLOGIES INC. - CLASS V 200,000 16,256,000 25381B101 DIGIMARC CORP. 413,000 14,929,950 23355L106 DXC TECHNOLOGY CO. 41,233 3,913,012 278642103 EBAY, INC.

7 271,900 10,261,506 285512109 ELECTRONIC ARTS, INC. 125,000 13,132,500 28849P100 ELLIE MAE, INC. 2,267,700 202,732,380 311642102 FARO TECHNOLOGIES, INC. 1,503,322 70,656,134 Y2573F102 FLEX LTD. 8,756,900 157,536,631 346375108 FORMFACTOR, INC. 1,132,800 17,728,320 362393100 GTT COMMUNICATIONS, INC. 7,000 328,650 42824C109 HEWLETT PACKARD ENTERPRISE CO. 1,186,000 17,030,960 40434L105HP, INC. 535,000 11,240,350 443573100 HUBSPOT, INC.

8 486,050 42,966,820 461202103 INTUIT, INC. 224,500 35,421,610 466313103 JABIL CIRCUIT, INC. 765,000 20,081,250 49338L103 KEYSIGHT TECHNOLOGIES, INC. 270,000 11,232,000 482480100 KLA-TENCOR CORP. 764,400 80,315,508 57776J100 MAXLINEAR, INC. - CLASS A 555,000 14,663,100 594837304 MICRO FOCUS INTERNATIONAL PLC - ADR 159,822 5,368,421 595112103 MICRON TECHNOLOGY, INC. 6,670,000 274,270,400 60255W105 MINDBODY, INC. - CLASS A 543,877 16,561,055 64110D104 NETAPP, INC.

9 2,157,467 119,351,074 67020Y100 NUANCE COMMUNICATIONS, INC. 2,874,000 46,989,900 67059N108 NUTANIX, INC. 745,582 26,304,133 67066G104 NVIDIA CORP. 703,855 136,195,943 671044105 OSI SYSTEMS, INC. 311,900 20,080,122 74346Y103 PROS HOLDINGS, INC. 609,087 16,110,351 747525103 QUALCOMM, INC. 676,300 43,296,726 750917106 RAMBUS, INC. 125,000 1,777,500 78112V102 RUBICON PROJECT, INC. (THE) 1,243,600 2,325,532 81763U100 SERVICESOURCE INTERNATIONAL, INC.

10 8,822,000 27,259,980 848637104 SPLUNK, INC. 2,113,200 175,057,488 M85548101 STRATASYS LTD. 2,300,000 45,908,000 896239100 TRIMBLE, INC. 740,300 30,085,792 91347P105 UNIVERSAL DISPLAY CORP. 285,000 49,205,250 928563402 VMWARE, INC. - CLASS A 325,000 40,729,000 958102105 WESTERN DIGITAL CORP. 64,000 5,089,920 2,942,461,764 Consumer Discretionary - , INC. 100 116,947 04351G101 ASCENA RETAIL GROUP, INC. 2,248,000 5,282,800 099406100 BOOT BARN HOLDINGS, INC.