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SEC Form 13F

PRIMECAP MANAGEMENT CO/CA/ 13F Holdings

Inspect PRIMECAP MANAGEMENT CO/CA/'s 2026-06-30 SEC 13F positions, public filing date, amendments and original receipt.

As of 2026-08-15T03:59:59.999Z

Report period
2026-06-30
Publicly available
2026-08-15
Reported value
$169,112,441,771
Positions
324
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Disclosed positions

Largest disclosed position values

Scale: 0 to 22,182,000,000 USD · zero baseline

Largest disclosed position values

  • MU · COM+22,182,263,342 USD
  • LLY · COM+11,002,256,246 USD
  • INTC · COM+10,507,291,264 USD
  • KLAC · COM NEW+6,196,136,809 USD
  • GOOGL · CAP STK CL A+5,310,435,649 USD
  • FLEX · ORD+3,785,772,872 USD
  • AZN · ORD+3,431,207,652 USD
  • NVDA · COM+3,417,373,127 USD
  • BIIB · COM+3,274,304,389 USD
  • AMZN · COM+2,851,067,887 USD

Reported underlying-position values for 2026-06-30, publicly available 2026-08-15. Put/call values are not option premiums; this subset is not a complete portfolio allocation. Exact issuer, class and unit remain in the table. Showing the first 10 of 50 recorded values; the complete table remains available below.

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MICRON TECHNOLOGY INCMUCOM$22,182,263,34219,217,236SHNone
ELI LILLY & COLLYCOM$11,002,256,2469,172,904SHNone
INTEL CORPINTCCOM$10,507,291,26475,250,958SHNone
KLA CORPKLACCOM NEW$6,196,136,80920,536,730SHNone
ALPHABET INCGOOGLCAP STK CL A$5,310,435,64914,859,769SHNone
FLEX LTDFLEXORD$3,785,772,87223,358,875SHNone
ASTRAZENECA PLCAZNORD$3,431,207,65218,095,178SHNone
NVIDIA CORPORATIONNVDACOM$3,417,373,12717,079,180SHNone
BIOGEN INCBIIBCOM$3,274,304,38915,154,606SHNone
AMAZON COM INCAMZNCOM$2,851,067,88711,962,188SHNone
MICROSOFT CORPMSFTCOM$2,663,687,3287,140,870SHNone
TESLA INCTSLACOM$2,566,934,4186,103,030SHNone
FEDEX CORPFDXCOM$2,554,138,4728,156,799SHNone
TEXAS INSTRS INCTXNCOM$2,538,062,7718,514,989SHNone
SOUTHWEST AIRLS COLUVCOM$2,509,179,01948,797,725SHNone
AMGEN INCAMGNCOM$2,446,831,0806,756,962SHNone
SCHWAB CHARLES CORPSCHWCOM$2,317,904,98325,120,895SHNone
UNITED AIRLS HLDGS INCUALCOM$2,238,617,06516,461,630SHNone
BOSTON SCIENTIFIC CORPBSXCOM$2,156,232,60850,520,914SHNone
ROSS STORES INCROSTCOM$1,937,994,9969,104,980SHNone
ALPHABET INCGOOGCAP STK CL C$1,907,649,8725,399,060SHNone
ALIBABA GROUP HLDG LTDBABASPONSORED ADS$1,786,313,15018,611,306SHNone
DELTA AIR LINES INCDALCOM NEW$1,641,032,50317,521,167SHNone
VISA INCVCOM CL A$1,464,476,5784,268,491SHNone
BRISTOL-MYERS SQUIBB COBMYCOM$1,436,115,12024,923,900SHNone
TJX COS INC NEWTJXCOM$1,435,617,0309,476,020SHNone
BEONE MEDICINES LTDONCSPONSORED ADS$1,427,110,0975,007,931SHNone
RAYMOND JAMES FINL INCRJFCOM$1,405,145,1829,242,552SHNone
NETAPP INCNTAPCOM$1,395,422,9459,016,690SHNone
GSK PLCGSKSPONSORED ADR$1,320,044,00625,182,068SHNone
AMERICAN AIRLINES GROUP INCAALCOM$1,278,144,48070,732,954SHNone
BAIDU INCBIDUSPON ADR REP A$1,258,344,32911,010,100SHNone
ANALOG DEVICES INCADICOM$1,242,478,8273,128,329SHNone
JABIL INCJBLCOM$1,220,861,4183,167,120SHNone
CONOCOPHILLIPSCOPCOM$1,204,726,42611,588,365SHNone
SONY GROUP CORPSONYSPONSORED ADR$1,195,640,79459,603,230SHNone
ELANCO ANIMAL HEALTH INCELANCOM$1,118,401,74545,445,012SHNone
JPMORGAN CHASE & COJPMCOM$1,107,235,2963,382,627SHNone
ADOBE INCADBECOM$1,071,668,0375,227,139SHNone
NORTHERN TR CORPNTRSCOM$1,060,552,9896,100,742SHNone
CORNING INCGLWCOM$1,055,404,0654,131,872SHNone
NOVARTIS AGNVSSPONSORED ADR$1,033,117,6726,592,124SHNone
THERMO FISHER SCIENTIFIC INCTMOCOM$993,831,3901,982,271SHNone
CATERPILLAR INCCATCOM$928,273,330871,700SHNone
MARVELL TECHNOLOGY INCMRVLCOM$821,579,1312,757,995SHNone
BIOMARIN PHARMACEUTICAL INCBMRNCOM$811,962,32914,190,183SHNone
NEXTPOWER INCNXTCLASS A COM$796,899,7016,688,767SHNone
ORACLE CORPORCLCOM$789,352,0095,386,230SHNone
HEWLETT PACKARD ENTERPRISE CHPECOM$773,224,87317,140,875SHNone
APPLIED MATLS INCAMATCOM$754,035,4981,042,926SHNone

Largest 50 positions by reported value; the filing may contain more positions.

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MICRON TECHNOLOGY INCMUCOM$22,182,263,34219,217,236SHNone

First displayed source row from Disclosed positions. The full bounded history and coverage notes remain below.

The displayed observation date is 2026-06-30 and its public availability date is 2026-08-15. Subtracting those calendar dates gives 46 days of disclosure lag. Historical public research can use the record from the availability date, rather than backdating knowledge to the observation date. The calendar-day difference does not assert an intraday publication time.

Read the amount together with its Unit and Option columns. A reported put or call position is not an option premium paid, and a quarterly holding is not a purchase made on its public filing date. Check every accession in the effective amendment lineage below: a retained holding can originate in an earlier filing rather than the latest linked amendment.

Open the linked original receipts to verify the row, then inspect a second record before drawing a pattern. This public filing observation supplies source evidence, not a completed copy-trading return.

How amendments affect these holdings

This view uses 1 effective filing version(s). A restatement replaces the previous book; a new-holdings amendment adds positions. 1 positions lack a resolved ticker and 0 positions are put or call entries.

The displayed holdings combine the effective filing versions listed here. The latest receipt linked below identifies the current projection version; it is not proof that every retained holding originated in that latest amendment. Inspect all effective accessions when verifying a position's source.

A 13F is a delayed quarterly snapshot of disclosed holdings. It is not a complete trade ledger and does not reveal every position in a manager's portfolio. Option values refer to the reported underlying position rather than a traded option premium.

Show the table · 1 row, 2 columns
Effective SEC accessionRole in this view
0000763212-26-000028Latest effective version

Quarter end and public filing date

Use the filing's public availability date when constructing a historical observation. The quarter-end report period is earlier and cannot be substituted for when the public learned the holdings.