Michael Gelband’s Ribbon Communications RBBN Stock Holding History

Michael Gelband’s Portfolio RBBN Stock Details RBBN Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q2	$404K	Sell	172,615 -24,293	-12%	-$64.1K	﹤0.01%	1290
2026 Q1	$417K	Sell	196,908 -1,283	-0.6%	-$3.07K	﹤0.01%	1236
2025 Q4	$571K	Buy	+198,191	New	+$639K	﹤0.01%	1157
2024 Q2	–	Sell	-45,706	Closed	-$146K	–	1902
2024 Q1	$146K	Buy	+45,706	New	+$139K	﹤0.01%	1395
2023 Q3	–	Sell	-74,739	Closed	-$209K	–	2058
2023 Q2	$209K	Buy	74,739 +20,977	+39%	+$58.2K	﹤0.01%	1665
2023 Q1	$184K	Buy	+53,762	New	+$196K	﹤0.01%	1582
2022 Q1	–	Sell	-31,484	Closed	-$190K	–	2595
2021 Q4	$190K	Buy	31,484 +12,278	+64%	+$72.8K	﹤0.01%	1842
2021 Q3	$115K	Buy	+19,206	New	+$130K	﹤0.01%	1885

Other funds holding RBBN

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

Neuberger Berman Group New York $150B AUM 40.08% 1-Year Est. Return

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

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

Royce & Associates New York $12.4B AUM 64.17% 1-Year Est. Return

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM

PCMI

Paradigm Capital Management Inc Albany, New York $3.67B AUM 121.12% 1-Year Est. Return

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

Connor, Clark & Lunn Investment Management (CC&L) Vancouver, British Columbia, Canada $52.8B AUM 58.98% 1-Year Est. Return

Michael Gelband's RBBN Position: Q2 2026 in Review

Michael Gelband reduced its Ribbon Communications (RBBN) stake by 12% in Q2 2026, selling an estimated $64.1K and leaving 172,615 shares worth $404K. The position accounts for ﹤0.01% of the portfolio, ranked #1290.

Michael Gelband first reported a position in RBBN in Q3 2021 and has held it in 8 quarters since. The position peaked at $571K in Q4 2025. 159 funds tracked by Wall St. Rank hold RBBN as of Q2 2026.

Michael Gelband held 172,615 shares of Ribbon Communications worth $404K as of Q2 2026.
Michael Gelband sold 24,293 Ribbon Communications shares in Q2 2026, an estimated $64.1K.
Ribbon Communications made up ﹤0.01% of Michael Gelband's portfolio in Q2 2026, its #1290 holding.
Michael Gelband first reported a position in Ribbon Communications in Q3 2021 and has held it in 8 quarters since.
Michael Gelband's Ribbon Communications position peaked at $571K in Q4 2025.
159 funds tracked by Wall St. Rank held Ribbon Communications as of Q2 2026.

Based on ExodusPoint Capital Management's 13F filing for Q2 2026, filed 14 Aug 2026.