Ribbon Communications Inc.: which funds bought and sold

Institutions that bought and sold Ribbon Communications shares in Q2 2026, from the holdings they reported to the SEC on Form 13F for March 31, 2026 and June 30, 2026.

Between March 31, 2026 and June 30, 2026, 87 institutions that filed 13F reports for both quarters added to or opened positions in Ribbon Communications, and 54 cut or closed them. Together they sold a net 933K shares, −0.7% on what they held at the start of the quarter. Active managers and hedge funds on our list were net buyers of 3.2M shares (+9.9%); index fund managers were net buyers of 558K shares (+2.7%). 22 opened a new position and 12 sold out entirely.

Bought, Q2 2026 87 institutions, 22 of them new holders Sold, Q2 2026 54 institutions, 12 of them sold out

Net change, all compared −933K shares (−0.7%)

Net change, active managers +3.2M shares (+9.9%), 19 bought, 8 sold

Buyers versus sellers

institutions compared, 171

87 bought 30 54 sold

Active managers and hedge funds 19 bought · 8 sold · +3.2M

Index fund managers 7 bought · 3 sold · +558K

Other institutions 61 bought · 43 sold · −4.6M

Biggest buyers

by change in shares held

Biggest buyers
Institution	Change in shares	Shares June 30, 2026	Value
Neuberger Berman Group LLC Active manager	+949K +5.5%	18.3M	$38.7M
Citadel Advisors LLC Hedge fund	+666K +115.9%	1.2M	$2.9M
Blackrock, Inc. Index funds	+423K +6.3%	7.1M	$16.7M
Acadian Asset Management LLC Active manager	+330K +22.9%	1.8M	$4.1M
BNP Paribas Asset Management Holding S.A.	+304K New position	304K	$710,422
D. E. Shaw & Co., Inc. Hedge fund	+252K +16.4%	1.8M	$4.2M
Royce & Associates LP Active manager	+211K +4.3%	5.1M	$11.9M
Millennium Management LLC Hedge fund	+207K +42.2%	698K	$1.6M
Squarepoint Ops LLC Hedge fund	+191K New position	191K	$447,881
Vanguard Portfolio Management LLC Index funds	+177K +5.3%	3.5M	$8.2M
Xtx Topco Ltd	+162K +100.9%	323K	$756,538
AQR Capital Management LLC Hedge fund	+152K +12.1%	1.4M	$3.3M
Qube Research & Technologies Ltd Hedge fund	+138K New position	138K	$322,684
Connor, Clark & Lunn Investment Management Ltd.	+123K +5.9%	2.2M	$5.2M
Two Sigma Investments, LP Hedge fund	+102K New position	102K	$239,118
Winton Group Ltd Hedge fund	+99K +198.1%	149K	$349,605
Charles Schwab Investment Management Inc Index funds	+92K +13.0%	800K	$1.9M
Hillsdale Investment Management Inc.	+91K New position	91K	$212,970
Simplex Trading, LLC	+74K New position	74K	$172,867
Geode Capital Management, LLC Index funds	+71K +2.9%	2.5M	$5.8M

Biggest buyers, active managers and hedge funds
Institution	Change in shares	Shares June 30, 2026	Value
Neuberger Berman Group LLC Active manager	+949K +5.5%	18.3M	$38.7M
Citadel Advisors LLC Hedge fund	+666K +115.9%	1.2M	$2.9M
Acadian Asset Management LLC Active manager	+330K +22.9%	1.8M	$4.1M
D. E. Shaw & Co., Inc. Hedge fund	+252K +16.4%	1.8M	$4.2M
Royce & Associates LP Active manager	+211K +4.3%	5.1M	$11.9M
Millennium Management LLC Hedge fund	+207K +42.2%	698K	$1.6M
Squarepoint Ops LLC Hedge fund	+191K New position	191K	$447,881
AQR Capital Management LLC Hedge fund	+152K +12.1%	1.4M	$3.3M
Qube Research & Technologies Ltd Hedge fund	+138K New position	138K	$322,684
Two Sigma Investments, LP Hedge fund	+102K New position	102K	$239,118

Biggest sellers

by change in shares held

Biggest sellers
Institution	Change in shares	Shares June 30, 2026	Value
Paradigm Capital Management Inc	−5.0M −62.2%	3.0M	$7.1M
Goldman Sachs Group Inc	−329K −44.2%	415K	$972,106
Vanguard Capital Management LLC Index funds	−291K −6.9%	3.9M	$9.2M
OP Asset Management Ltd	−207K Sold out	0	—
Engineers Gate Manager LP Hedge fund	−140K Sold out	0	—
Gsa Capital Partners LLP	−119K −40.5%	174K	$407,000
Jacobs Levy Equity Management, Inc Active manager	−103K −15.1%	582K	$1.4M
Herald Investment Management Ltd	−100K Sold out	0	—
Susquehanna Portfolio Strategies, LLC	−69K −73.9%	24K	$56,953
Dimensional Fund Advisors LP	−65K −1.0%	6.3M	$14.7M
State Of Wyoming	−55K Sold out	0	—
Morgan Stanley	−44K −10.3%	380K	$888,711
UBS Group AG	−27K −14.2%	165K	$386,970
Exoduspoint Capital Management, LP Hedge fund	−24K −12.3%	173K	$403,919
Schonfeld Strategic Advisors LLC Hedge fund	−22K Sold out	0	—
Bank Of America Corp	−20K −9.5%	188K	$440,942
Silverberg Bernstein Capital Management LLC	−19K −4.4%	419K	$980,046
Invesco Ltd.	−19K −10.5%	163K	$380,646
Franklin Resources Inc Active manager	−16K −14.9%	93K	$216,563
Seven Mile Advisory	−16K Sold out	0	—

Biggest sellers, active managers and hedge funds
Institution	Change in shares	Shares June 30, 2026	Value
Engineers Gate Manager LP Hedge fund	−140K Sold out	0	—
Jacobs Levy Equity Management, Inc Active manager	−103K −15.1%	582K	$1.4M
Exoduspoint Capital Management, LP Hedge fund	−24K −12.3%	173K	$403,919
Schonfeld Strategic Advisors LLC Hedge fund	−22K Sold out	0	—
Franklin Resources Inc Active manager	−16K −14.9%	93K	$216,563
Arrowstreet Capital, Limited Partnership Hedge fund	−1,646 −0.1%	1.2M	$2.8M
American Century Companies Inc Active manager	−1,287 −0.6%	211K	$493,918
Intech Investment Management LLC Active manager	−1,200 −5.5%	21K	$48,532

New positions

largest by value

Institution	Shares	Value June 30, 2026
BNP Paribas Asset Management Holding S.A.	304K	$710,422
Squarepoint Ops LLCHedge fund	191K	$447,881
Qube Research & Technologies LtdHedge fund	138K	$322,684
Two Sigma Investments, LPHedge fund	102K	$239,118
Hillsdale Investment Management Inc.	91K	$212,970
Simplex Trading, LLC	74K	$172,867
Highmark Wealth Management LLC	69K	$161,460
Worth Venture Partners, LLC	35K	$81,900
HSBC Holdings PLC	27K	$62,484
Brevan Howard Capital Management LPHedge fund	26K	$61,200

Sold out

largest by value

Institution	Shares	Value March 31, 2026
OP Asset Management Ltd	207K	$438,420
Engineers Gate Manager LPHedge fund	140K	$296,719
Herald Investment Management Ltd	100K	$212,000
State Of Wyoming	55K	$116,458
Schonfeld Strategic Advisors LLCHedge fund	22K	$46,182
Seven Mile Advisory	16K	$33,869
Nine Masts Capital Ltd	14K	$30,479
Y-Intercept (Hong Kong) Ltd	12K	$26,195
Mai Capital Management	641	$1,359
Root Financial Partners, LLC	164	$348

Who holds the shares

13F holdings at June 30, 2026

Institutions reporting: 160
Ten largest holders: 81.1%
Index fund managers: 16.6%
Active managers and hedge funds: 27.2%

Buying and selling by type of institution, March 31, 2026 to June 30, 2026
Type	Bought	Sold	New	Sold out	Net change in shares	Net %
Active managers and hedge funds	19	8	5	2	+3.2M	+9.9%
Index fund managers	7	3	0	0	+558K	+2.7%
Other institutions	61	43	17	10	−4.6M	−6.0%

Active managers and hedge funds: a list we maintain of about 400 well-known stock-picking firms and hedge funds, matched by SEC registration number (CIK) and checked against the filer names each quarter. Index fund managers: the large index houses, such as BlackRock, Vanguard, State Street, Geode and Northern Trust. Every other filer (banks, brokers, wealth managers, pension funds, insurers and firms not on the list) counts as another institution. A firm that files under several SEC registrations appears once for each.

What these filings can and cannot tell you

Form 13F lists the long positions in US-listed shares held by investment managers with more than $100 million in such holdings. Managers file it up to 45 days after each quarter ends, so this page shows what funds held at the end of each quarter, not what they are doing now: a position may have changed since. Short positions, most derivatives and smaller managers are not included, and a cut can mean a fund lost clients or rebalanced rather than a view on Ribbon Communications.

Only managers that filed a holdings report for both quarters are compared (171 here). 2 other holders are left out: first-time or late filers, firms that changed their SEC registration, and filings that withheld positions under confidential treatment, any of which would otherwise look like a new position or a sale. Figures are as reported by each manager in the SEC's quarterly 13F data sets; option positions are excluded.

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