How many shares of RMBS does PRIMECAP MANAGEMENT CO/CA/ own?

As of 2026-Q2, PRIMECAP MANAGEMENT CO/CA/ holds 47,500 shares of RMBS (RAMBUS INC).

What is PRIMECAP MANAGEMENT CO/CA/'s RMBS position worth?

As of 2026-Q2, PRIMECAP MANAGEMENT CO/CA/'s RMBS position is worth $6.3M.

When did PRIMECAP MANAGEMENT CO/CA/ first buy RMBS?

Based on available 13F filings, PRIMECAP MANAGEMENT CO/CA/ first reported a position in RMBS in 2018-Q4. They have held the position across 31 quarters.

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PRIMECAP MANAGEMENT CO/CA/

RMBS
31 quarters

Position history for PRIMECAP MANAGEMENT CO/CA/'s holdings in RAMBUS INC

Current Value

$6.3M

Current Shares

47,500

Total Value Change

-$3.3M

Total Shares Change

-1.2M

Quarter-by-Quarter History

Quarter	Action	Shares	Change	Value	Weight	Price	Conviction
2026-Q2 Latest	Unchanged	47,500	0.0%	$6.3M	0.0%	$132.74	0
2026-Q1	Unchanged	47,500	0.0%	$4.1M	0.0%	$87.59	0
2025-Q4	Decreased	47,500	-19.5%	$4.4M	0.0%	$94.69	0
2025-Q3	Decreased	59,000	-5.3%	$6.1M	0.0%	$103.99	0
2025-Q2	Decreased	62,300	-14.5%	$4M	0.0%	$64.00	0
2025-Q1	Decreased	72,900	-11.6%	$3.8M	0.0%	$53.70	0
2024-Q4	Decreased	82,500	-12.7%	$4.4M	0.0%	$53.60	0
2024-Q3	Decreased	94,500	-8.8%	$4M	0.0%	$42.12	0
2024-Q2	Decreased	103,600	-19.2%	$6.1M	0.0%	$58.76	0
2024-Q1	Decreased	128,200	-5.0%	$7.9M	0.0%	$61.81	0
2023-Q4	Decreased	134,963	-18.8%	$9.2M	0.0%	$68.25	0
2023-Q3	Decreased	166,163	-14.9%	$9.3M	0.0%	$55.79	0
2023-Q2	Decreased	195,363	-18.1%	$12.5M	0.0%	$63.10	0
2023-Q1	Unchanged	238,663	0.0%	$12.2M	0.0%	$50.53	0
2022-Q4	Decreased	238,663	-2.8%	$8.5M	0.0%	$35.82	0
2022-Q3	Decreased	245,563	-3.0%	$6.2M	0.0%	$25.77	0
2022-Q2	Decreased	253,163	-3.8%	$5.4M	0.0%	$21.60	0
2022-Q1	Decreased	263,163	-1.8%	$8.4M	0.0%	$32.30	0
2021-Q4	Decreased	267,963	-6.4%	$7.9M	0.0%	$29.03	0
2021-Q3	Decreased	286,263	-3.1%	$6.4M	0.0%	$22.29	0
2021-Q2	Decreased	295,289	-7.2%	$7M	0.0%	$23.84	0
2021-Q1	Decreased	318,048	-64.4%	$6.2M	0.0%	$19.19	0
2020-Q4	Decreased	892,445	-0.2%	$15.6M	0.0%	$17.53	0
2020-Q3	Unchanged	893,945	0.0%	$12.2M	0.0%	$13.74	0
2020-Q2	Decreased	893,945	-0.5%	$13.6M	0.0%	$14.64	0
2020-Q1	Decreased	897,945	-3.0%	$10M	0.0%	$11.42	0
2019-Q4	Decreased	925,345	-1.1%	$12.7M	0.0%	$13.70	0
2019-Q3	Decreased	936,045	-24.7%	$12.3M	0.0%	$13.33	0
2019-Q2	Decreased	1.2M	-0.4%	$15M	0.0%	$12.04	0
2019-Q1	Decreased	1.2M	-0.8%	$13M	0.0%	$10.45	0
2018-Q4	New	1.3M	-	$9.7M	0.0%	$7.71	38

Other major holders of RMBS: BNP PARIBAS FINANCIAL MARKETS, BlackRock, Inc.

RMBS31 quarters

RMBS
31 quarters