IMC Chicago’s Rambus RMBS Stock Holding History

IMC Chicago’s Portfolio RMBS Stock Details RMBS Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q2	$19.5M	Buy	147,000 +98,300	+202%	+$12.8M	﹤0.01%	1076
2026 Q1	$4.19M	Buy	48,700 +9,000	+23%	+$898K	﹤0.01%	1929
2025 Q4	$3.65M	Buy	39,700 +9,400	+31%	+$925K	﹤0.01%	1957
2025 Q3	$3.16M	Buy	30,300 +7,000	+30%	+$540K	﹤0.01%	1922
2025 Q2	$1.49M	Buy	23,300 +11,700	+101%	+$627K	﹤0.01%	2218
2025 Q1	$601K	Sell	11,600 -4,200	-27%	-$247K	﹤0.01%	2558
2024 Q4	$835K	Sell	15,800 -2,600	-14%	-$133K	﹤0.01%	2464
2024 Q3	$777K	Buy	18,400 +6,200	+51%	+$300K	﹤0.01%	2173
2024 Q2	$717K	Sell	12,200 -9,600	-44%	-$549K	﹤0.01%	2139
2024 Q1	$1.35M	Buy	21,800 +10,400	+91%	+$658K	﹤0.01%	1583
2023 Q4	$778K	Sell	11,400 -2,000	-15%	-$125K	﹤0.01%	1514
2023 Q3	$748K	Buy	+13,400	New	+$760K	﹤0.01%	1315
2023 Q2	–	Sell	-11,700	Closed	-$600K	–	1378
2023 Q1	$600K	Buy	+11,700	New	+$503K	﹤0.01%	1146

Other funds holding RMBS

BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return

Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return

Invesco Atlanta, Georgia $1.26T AUM 61.52% 1-Year Est. Return

Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return

T. Rowe Price Associates Baltimore, Maryland $999B AUM 46.22% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return

JP Morgan Chase New York $1.81T AUM 41.13% 1-Year Est. Return

Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return

IMC Chicago's RMBS Position: Q2 2026 in Review

IMC Chicago opened a new position in Rambus (RMBS) in Q2 2026: 7,129 shares worth $946K. The stake represents ﹤0.01% of the portfolio and ranks #3922 among its holdings. This is a return to the name: IMC Chicago previously reported a position in RMBS as recently as Q3 2025.

IMC Chicago first reported a position in RMBS in Q1 2024 and has held it in 3 quarters since. The position peaked at $2.13M in Q3 2025. 618 funds tracked by Wall St. Rank hold RMBS as of Q2 2026.

IMC Chicago held 7,129 shares of Rambus worth $946K as of Q2 2026.
Rambus was a new IMC Chicago position in Q2 2026.
Rambus made up ﹤0.01% of IMC Chicago's portfolio in Q2 2026, its #3922 holding.
IMC Chicago first reported a position in Rambus in Q1 2024 and has held it in 3 quarters since.
IMC Chicago's Rambus position peaked at $2.13M in Q3 2025.
618 funds tracked by Wall St. Rank held Rambus as of Q2 2026.

Based on IMC Chicago's 13F filing for Q2 2026, filed 6 Aug 2026.