Question 1

Does BlackRock own RMBS stock?

Accepted Answer

Yes. As of its Q2 2026 13F, BlackRock holds 13,964,477 shares of RMBS (Rambus), worth $1.9B.

Question 2

How many shares of RMBS does BlackRock own?

Accepted Answer

As of its Q2 2026 13F, BlackRock holds 13,964,477 shares of RMBS (Rambus).

Question 3

What is BlackRock's RMBS position worth?

Accepted Answer

As of its Q2 2026 13F, BlackRock's RMBS position is worth $1.9B.

Question 4

Is BlackRock buying or selling RMBS?

Accepted Answer

In Q2 2026, BlackRock reduced its RMBS position by 2,340,829 shares (-14.4%).

Question 5

When did BlackRock first buy RMBS?

Accepted Answer

BlackRock already held RMBS in its Q3 2024 13F, the earliest on record, and has listed it in 8 quarterly 13F filings.

Quarter	Action	Shares	Change	Value	Weight	Price	Conviction
2026-Q2 Latest	Decreased	14M	-14.4%	$1.9B	0.0%	$132.74	0
2026-Q1	Increased	16.3M	+0.2%	$1.4B	0.0%	$86.03	32
2025-Q4	Increased	16.3M	+3.0%	$1.5B	0.0%	$91.89	33
2025-Q3	Increased	15.8M	+5.4%	$1.6B	0.0%	$104.20	34
2025-Q2	Increased	15M	+5.4%	$960.3M	0.0%	$64.02	34
2025-Q1	Increased	14.2M	+0.7%	$737.1M	0.0%	$51.78	32
2024-Q4	Increased	14.1M	+3.3%	$747.4M	0.0%	$52.86	33
2024-Q3	First report	13.7M	-	$578.1M	0.0%	$42.22	0

RMBS8 quarters

RMBS
8 quarters