RBBN Ribbon Communications Inc.

NASDAQ
$1.72

Ribbon Communications Inc. (RBBN) Hedge Fund Activity

This view isolates hedge funds from the broader institutional ownership shown on the Institutional tab. A pension fund tracking an index may have no view on a stock; when a hedge fund builds or exits a position, that decision can carry information. This page measures those changes. Positions as of June 30, 2026.

Based on quarterly 13F long-equity filings. Changes compare reported quarter-end positions; filings can be reported up to 45 days later and do not represent a fund's complete exposure.

Hedge fund breadth
+46.67
11 buyers / 4 sellers
STRONG BUYING
Funds compared
15
funds with comparable RBBN positions
12 current holders · 10 prior-quarter holders
Net share change
+1.70M
+1.90M added, -198.4K cut
Position activity
5 new 6 increased 1 reduced 3 exited

Most significant moves

Ranked by conviction, not size — how much of the fund's own book the position represents, how far it moved, and what kind of fund made it.

Fund Action Shares changed Change Est. value Portfolio wt. Score
Balyasny Asset Management L.P. New +16.3K — $38.1K 0.0% 57
TWO SIGMA INVESTMENTS, LP Quant New +102.2K — $239.1K 0.0% 57
Qube Research & Technologies Ltd Quant New +137.9K — $322.7K 0.0% 55
Squarepoint Ops LLC Quant New +191.4K — $447.9K 0.0% 54
CITADEL ADVISORS LLC Quant Increased +666.2K +115.9% $1.6M 0.0% 54
Schonfeld Strategic Advisors Long/Short Quant Sold Out -21.8K -100.0% $51.0K 0.0% 51
Brevan Howard Capital Management Macro New +26.2K — $61.2K 0.0% 49
Y-Intercept Quant Sold Out -12.4K -100.0% $28.9K 0.0% 48
Engineers Gate Quant Sold Out -140.0K -100.0% $327.5K 0.0% 48
Winton Group Quant Macro Increased +99.3K +198.1% $232.3K 0.0% 42

Most significant buyers

By move score, not size.

  • Balyasny Asset Management L.P. New · +16.3K
  • TWO SIGMA INVESTMENTS, LP New · +102.2K
  • Qube Research & Technologies Ltd New · +137.9K
  • Squarepoint Ops LLC New · +191.4K
  • CITADEL ADVISORS LLC Increased · +666.2K

Most significant sellers

By move score, not size.

  • Schonfeld Strategic Advisors Sold Out · -21.8K
  • Y-Intercept Sold Out · -12.4K
  • Engineers Gate Sold Out · -140.0K
  • ExodusPoint Capital Management Reduced · -24.3K

Hedge fund positions

Fund Tier Shares Previous Change Change % Portfolio wt. Action Score
Balyasny Asset Management L.P. 2 16.3K 0 +16.3K — 0.0% New 57
TWO SIGMA INVESTMENTS, LP 2 102.2K 0 +102.2K — 0.0% New 57
Qube Research & Technologies Ltd 2 137.9K 0 +137.9K — 0.0% New 55
Squarepoint Ops LLC 2 191.4K 0 +191.4K — 0.0% New 54
CITADEL ADVISORS LLC 1 1.2M 575.0K +666.2K +115.9% 0.0% Increased 54
Schonfeld Strategic Advisors 3 0 21.8K -21.8K -100.0% 0.0% Sold Out 51
Brevan Howard Capital Management 3 26.2K 0 +26.2K — 0.0% New 49
Y-Intercept 4 0 12.4K -12.4K -100.0% 0.0% Sold Out 48
Engineers Gate 4 0 140.0K -140.0K -100.0% 0.0% Sold Out 48
Winton Group 4 149.4K 50.1K +99.3K +198.1% 0.0% Increased 42
MILLENNIUM MANAGEMENT LLC 2 698.5K 491.3K +207.1K +42.2% 0.0% Increased 37
D. E. Shaw & Co., Inc. 1 1.8M 1.5M +251.9K +16.4% 0.0% Increased 31
MARSHALL WACE, LLP 2 814.1K 769.8K +44.3K +5.8% 0.0% Increased 27
ExodusPoint Capital Management 3 172.6K 196.9K -24.3K -12.3% 0.0% Reduced 24
AQR Capital Management 3 1.4M 1.3M +152.4K +12.1% 0.0% Increased 23

Every fund above opens. Subscribers can see any manager's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.

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Hedge funds are identified from their 13F filings, which are due 45 days after quarter end and cover long U.S.-listed equity positions only. A fund's short book never appears, so a reduced position can mean a changed view or a changed hedge — the filing doesn't say which.