Shannon River Fund Management’s Rambus RMBS Stock Holding History

Shannon River Fund Management’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	$38.7M	Sell	291,713 -42,104	-13%	-$5.48M	3.46%	13
2026 Q1	$28.7M	Buy	+333,817	New	+$33.3M	5.48%	5
2022 Q4	–	Sell	-739,988	Closed	-$18.8M	–	34
2022 Q3	$18.8M	Sell	739,988 -170,568	-19%	-$4.26M	8.08%	4
2022 Q2	$19.6M	Buy	910,556 +128,701	+16%	+$3.18M	5.56%	6
2022 Q1	$24.9M	Sell	781,855 -149,118	-16%	-$4.13M	2.77%	16
2021 Q4	$27.4M	Buy	930,973 +193,000	+26%	+$4.91M	2.78%	15
2021 Q3	$16.4M	Hold	737,973	–	–	1.16%	24
2021 Q2	$17.5M	Buy	+737,973	New	+$14.9M	1.27%	23

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

Shannon River Fund Management's RMBS Position: Q2 2026 in Review

Shannon River Fund Management reduced its Rambus (RMBS) stake by 13% in Q2 2026, selling an estimated $5.48M and leaving 291,713 shares worth $38.7M. The position accounts for 3.46% of the portfolio, ranked #13.

Shannon River Fund Management first reported a position in RMBS in Q2 2021 and has held it in 8 quarters since. 614 funds tracked by Wall St. Rank hold RMBS as of Q2 2026.

Shannon River Fund Management held 291,713 shares of Rambus worth $38.7M as of Q2 2026.
Shannon River Fund Management sold 42,104 Rambus shares in Q2 2026, an estimated $5.48M.
Rambus made up 3.46% of Shannon River Fund Management's portfolio in Q2 2026, its #13 holding.
Shannon River Fund Management first reported a position in Rambus in Q2 2021 and has held it in 8 quarters since.
614 funds tracked by Wall St. Rank held Rambus as of Q2 2026.

Based on Shannon River Fund Management's 13F filing for Q2 2026, filed 13 Aug 2026.