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PRIMECAP decreased AM6 position by 78,500 shares

Mar 28, 2026Last updated Apr 20, 2026

This StonkWhisper whale intelligence report documents significant institutional position changes in $AM6 based on SEC 13F filings and block-level trading data. Quarterly 13F disclosures are required for institutional investment managers with at least $100 million in qualifying assets under management. These filings reveal long positions in U.S. equities held as of quarter end. Material changes in institutional positioning — particularly from concentrated funds with a history of high-conviction bets — are tracked by StonkWhisper as leading indicators of institutional thesis formation or exit.

PRIMECAP MANAGEMENT CO/CA/ AUM: $132.1B DECREASED

AUM: $132.1B · 319 holdings · Period: 2025-12-31

78,500 Share Change

589,400 Current Shares

$8.4B Current Value

0.01% Portfolio %

-11.8% Change %

Position Change Detail

Issuer AMICUS THERAPEUTICS INC

Ticker AM6

Shares 667,900 → 589,400 78,500

Value $5.3B → $8.4B

Portfolio Weight 0.01%

Change Type Decreased

Period of Report 2025-12-31

Other PRIMECAP Positions This Period

Ticker	Issuer	Change Type	Share Change	Value
WFC	WELLS FARGO CO NEW	Decreased	6,566,583	$779.2B
SONY	SONY GROUP CORP	Decreased	6,140,660	$1492.5B
NWL	NEWELL BRANDS INC	Decreased	5,309,046	$32.4B
OPTU	ALTICE USA INC	Exited	4,869,860	—
MU	MICRON TECHNOLOGY INC	Decreased	4,860,499	$7076.7B
CHV	CHEVRON CORP NEW	Decreased	4,037,474	$354.4B
NFLX	NETFLIX INC	Increased	+3,826,870	$377.2B
ELAN	ELANCO ANIMAL HEALTH INC	Decreased	3,744,068	$1045.8B
INTC	INTEL CORP	Decreased	3,273,242	$2809.3B
AZN	ASTRAZENECA PLC	Decreased	2,942,710	$3393.6B

Other Whales Moving AM6 This Period

Manager	Change Type	Share Change
Millennium	Decreased	11,759,796
Pentwater	New	+11,500,000
William Blair	Decreased	5,121,523
Point72	Decreased	5,088,103
Soros Fund	New	+5,000,000
Balyasny	Increased	+3,747,363
State Street	Increased	+3,270,375
Adage Capital	New	+1,650,000
Hudson Bay	Decreased	1,452,500
Schonfeld	Decreased	1,102,980

View all sentiment, news, and whale activity for AM6 (AMICUS THERAPEUTICS INC).

Track PRIMECAP and other whale moves in real time on The Wire →

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Data sourced from SEC 13F institutional holdings filings. This page does not constitute financial advice. StonkWhisper presents public records — it does not verify or guarantee the accuracy of institutional filings. 13F filings are reported quarterly and may lag actual positions.

Last updated: April 20, 2026 at 06:01 UTC