XFOR X4 Pharmaceuticals, Inc.

NASDAQ
$3.01

X4 Pharmaceuticals, Inc. (XFOR) 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
-12.50
7 buyers / 9 sellers
SELLING
Funds compared
19
funds with comparable XFOR positions
12 current holders · 16 prior-quarter holders
Net share change
+991.8K
+3.78M added, -2.79M cut
Position activity
3 new 4 increased 2 reduced 7 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
Point72 Asset Management, L.P. New +41.1K — $191.8K 0.0% 59
MILLENNIUM MANAGEMENT LLC Sold Out -1.21M -100.0% $5.7M 0.0% 59
RENAISSANCE TECHNOLOGIES LLC Quant New +18.1K — $84.5K 0.0% 58
MARSHALL WACE, LLP Long/Short Sold Out -336.8K -100.0% $1.6M 0.0% 58
Qube Research & Technologies Ltd Quant Sold Out -219.0K -100.0% $1.0M 0.0% 57
Nantahala Capital Management Event Long/Short Increased +2.45M +100.0% $11.4M 0.7% 55
Squarepoint Ops LLC Quant New +67.1K — $313.3K 0.0% 54
Hudson Bay Capital Management Event Sold Out -50.3K -100.0% $234.8K 0.0% 53
ExodusPoint Capital Management Long/Short Quant Sold Out -14.7K -100.0% $68.7K 0.0% 52
Schonfeld Strategic Advisors Long/Short Quant Sold Out -19.5K -100.0% $91.1K 0.0% 51

Most significant buyers

By move score, not size.

  • Point72 Asset Management, L.P. New · +41.1K
  • RENAISSANCE TECHNOLOGIES LLC New · +18.1K
  • Nantahala Capital Management Increased · +2.45M
  • Squarepoint Ops LLC New · +67.1K
  • Perceptive Advisors Increased · +1.20M

Most significant sellers

By move score, not size.

  • MILLENNIUM MANAGEMENT LLC Sold Out · -1.21M
  • MARSHALL WACE, LLP Sold Out · -336.8K
  • Qube Research & Technologies Ltd Sold Out · -219.0K
  • Hudson Bay Capital Management Sold Out · -50.3K
  • ExodusPoint Capital Management Sold Out · -14.7K

Hedge fund positions

Fund Tier Shares Previous Change Change % Portfolio wt. Action Score
Point72 Asset Management, L.P. 1 41.1K 0 +41.1K — 0.0% New 59
MILLENNIUM MANAGEMENT LLC 2 0 1.2M -1.21M -100.0% 0.0% Sold Out 59
RENAISSANCE TECHNOLOGIES LLC 1 18.1K 0 +18.1K — 0.0% New 58
MARSHALL WACE, LLP 2 0 336.8K -336.8K -100.0% 0.0% Sold Out 58
Qube Research & Technologies Ltd 2 0 219.0K -219.0K -100.0% 0.0% Sold Out 57
Nantahala Capital Management 3 4.9M 2.4M +2.45M +100.0% 0.7% Increased 55
Squarepoint Ops LLC 2 67.1K 0 +67.1K — 0.0% New 54
Hudson Bay Capital Management 3 0 50.3K -50.3K -100.0% 0.0% Sold Out 53
ExodusPoint Capital Management 3 0 14.7K -14.7K -100.0% 0.0% Sold Out 52
Schonfeld Strategic Advisors 3 0 19.5K -19.5K -100.0% 0.0% Sold Out 51
Brevan Howard Capital Management 3 0 127.3K -127.3K -100.0% 0.0% Sold Out 49
Perceptive Advisors 1 7.9M 6.7M +1.20M +17.7% 0.6% Increased 38
TWO SIGMA INVESTMENTS, LP 2 19.4K 13.9K +5.6K +40.1% 0.0% Increased 36
Deep Track Capital 1 5.9M 6.3M -460.8K -7.3% 0.4% Reduced 36
Braidwell 2 2.9M 3.3M -350.2K -10.7% 0.5% Reduced 33
Winton Group 4 14.4K 10.6K +3.8K +35.8% 0.0% Increased 26
Biotechnology Value Fund 1 2.2M 2.2M 0 +0.0% 0.3% Unchanged 24
Woodline Partners LP 2 1.0M 1.0M 0 +0.0% 0.0% Unchanged 18
Affinity Asset Advisors 2 145.0K 145.0K 0 +0.0% 0.0% Unchanged 19

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.