RLYB Rallybio Corporation

NASDAQ
$16.62

Rallybio Corporation (RLYB) 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
+71.43
6 buyers / 1 seller
STRONG BUYING
Funds compared
8
funds with comparable RLYB positions
7 current holders · 6 prior-quarter holders
Net share change
+730.8K
+1.11M added, -376.6K cut
Position activity
2 new 4 increased 0 reduced 1 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. Sold Out -376.6K -100.0% $6.0M 0.0% 59
TWO SIGMA INVESTMENTS, LP Quant New +16.6K — $265.9K 0.0% 57
ADAR1 Capital Management Long/Short Growth Increased +905.8K +4411.1% $14.5M 0.7% 55
Quadrature Capital Quant New +13.0K — $207.9K 0.0% 52
CITADEL ADVISORS LLC Quant Increased +52.3K +263.1% $837.0K 0.0% 52
RENAISSANCE TECHNOLOGIES LLC Quant Increased +43.4K +27.7% $694.1K 0.0% 34
Nantahala Capital Management Event Long/Short Increased +76.2K +25.3% $1.2M 0.2% 31

Most significant buyers

By move score, not size.

  • TWO SIGMA INVESTMENTS, LP New · +16.6K
  • ADAR1 Capital Management Increased · +905.8K
  • Quadrature Capital New · +13.0K
  • CITADEL ADVISORS LLC Increased · +52.3K
  • RENAISSANCE TECHNOLOGIES LLC Increased · +43.4K

Most significant sellers

By move score, not size.

  • Balyasny Asset Management L.P. Sold Out · -376.6K

Hedge fund positions

Fund Tier Shares Previous Change Change % Portfolio wt. Action Score
Balyasny Asset Management L.P. 2 0 376.6K -376.6K -100.0% 0.0% Sold Out 59
TWO SIGMA INVESTMENTS, LP 2 16.6K 0 +16.6K — 0.0% New 57
ADAR1 Capital Management 3 926.4K 20.5K +905.8K +4411.1% 0.7% Increased 55
Quadrature Capital 3 13.0K 0 +13.0K — 0.0% New 52
CITADEL ADVISORS LLC 1 72.2K 19.9K +52.3K +263.1% 0.0% Increased 52
RENAISSANCE TECHNOLOGIES LLC 1 199.9K 156.5K +43.4K +27.7% 0.0% Increased 34
Nantahala Capital Management 3 376.8K 300.6K +76.2K +25.3% 0.2% Increased 31
VIKING GLOBAL INVESTORS LP 1 524.3K 524.3K 0 +0.0% 0.0% Unchanged 25

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.