Question 1

How many shares of RBBN does ARROWSTREET CAPITAL, LIMITED PARTNERSHIP own?

Accepted Answer

As of 2026-Q1, ARROWSTREET CAPITAL, LIMITED PARTNERSHIP holds 1.2M shares of RBBN (RIBBON COMMUNICATIONS INC).

Question 2

What is ARROWSTREET CAPITAL, LIMITED PARTNERSHIP's RBBN position worth?

Accepted Answer

As of 2026-Q1, ARROWSTREET CAPITAL, LIMITED PARTNERSHIP's RBBN position is worth $2.6M.

Question 3

Is ARROWSTREET CAPITAL, LIMITED PARTNERSHIP buying or selling RBBN?

Accepted Answer

In 2026-Q1, ARROWSTREET CAPITAL, LIMITED PARTNERSHIP increased their RBBN position (+18.2% change in shares).

Question 4

When did ARROWSTREET CAPITAL, LIMITED PARTNERSHIP first buy RBBN?

Accepted Answer

Based on available 13F filings, ARROWSTREET CAPITAL, LIMITED PARTNERSHIP first reported a position in RBBN in 2018-Q4. They have held the position across 30 quarters.

Quarter	Action	Shares	Change	Value	Weight	Price	Conviction
2026-Q1 Latest	Increased	1.2M	+18.2%	$2.6M	0.0%	$2.33	31
2025-Q4	Increased	1M	+6.8%	$3M	0.0%	$2.95	28
2025-Q3	Increased	964,446	+99.6%	$3.7M	0.0%	$3.76	43
2025-Q2	Decreased	483,170	-13.2%	$1.9M	0.0%	$3.95	0
2025-Q1	Decreased	556,324	-5.7%	$2.2M	0.0%	$4.06	0
2024-Q4	Decreased	589,756	-14.5%	$2.5M	0.0%	$4.15	0
2024-Q3	Decreased	690,070	-4.8%	$2.2M	0.0%	$3.26	0
2024-Q2	Decreased	725,273	-10.4%	$2.4M	0.0%	$3.29	0
2024-Q1	Increased	809,253	+29.6%	$2.6M	0.0%	$3.20	33
2023-Q4	Decreased	624,353	-40.4%	$1.8M	0.0%	$2.90	0
2023-Q3	Decreased	1M	-2.2%	$2.8M	0.0%	$2.68	0
2023-Q2	Increased	1.1M	+18.7%	$3M	0.0%	$2.64	31
2023-Q1	Increased	902,256	+93.0%	$3.1M	0.0%	$3.44	42
2022-Q4	Unchanged	467,514	0.0%	$1.3M	0.0%	$2.79	0
2022-Q3	Increased	467,514	+8.6%	$1M	0.0%	$2.33	27
2022-Q2	Increased	430,372	+53.9%	$1.3M	0.0%	$2.96	36
2022-Q1	Decreased	279,715	-22.7%	$864,000	0.0%	$3.13	0
2021-Q4	Decreased	361,690	-51.4%	$2.2M	0.0%	$6.07	0
2021-Q3	Decreased	743,708	-29.5%	$4.4M	0.0%	$5.97	0
2021-Q2	Increased	1.1M	+25.9%	$8M	0.0%	$7.70	34
2021-Q1	Increased	837,961	+16.8%	$6.9M	0.0%	$8.21	32
2020-Q4	Increased	717,207	+8.1%	$4.7M	0.0%	$6.47	29
2020-Q3	Decreased	663,511	-16.3%	$2.6M	0.0%	$3.80	0
2020-Q2	Unchanged	792,781	0.0%	$3.1M	0.0%	$3.90	0
2020-Q1	Increased	792,781	+9.7%	$2.4M	0.0%	$3.15	29
2019-Q4	Increased	723,026	+59.5%	$2.2M	0.0%	$3.08	37
2019-Q3	Increased	453,200	+138.1%	$2.6M	0.0%	$5.79	42
2019-Q2	Decreased	190,316	-62.1%	$931,000	0.0%	$4.89	0
2019-Q1	Increased	502,420	+188.2%	$2.6M	0.0%	$5.15	42
2018-Q4	New	174,327	-	$840,000	0.0%	$5.09	34

RBBN30 quarters

RBBN
30 quarters