ABOS Acumen Pharmaceuticals, Inc.

NASDAQ
$2.57

Acumen Pharmaceuticals, Inc. (ABOS) 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
-14.29
6 buyers / 8 sellers
SELLING
Funds compared
17
funds with comparable ABOS positions
14 current holders · 14 prior-quarter holders
Net share change
-555.7K
+422.9K added, -978.6K cut
Position activity
3 new 3 increased 5 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
Point72 Asset Management, L.P. Sold Out -67.4K -100.0% $179.9K 0.0% 59
CITADEL ADVISORS LLC Quant New +51.0K — $136.3K 0.0% 58
Balyasny Asset Management L.P. New +11.9K — $31.7K 0.0% 57
MILLENNIUM MANAGEMENT LLC Reduced -599.1K -90.8% $1.6M 0.0% 51
Schonfeld Strategic Advisors Long/Short Quant Sold Out -11.3K -100.0% $30.2K 0.0% 51
Brevan Howard Capital Management Macro Sold Out -15.4K -100.0% $41.1K 0.0% 49
Squarepoint Ops LLC Quant Increased +37.3K +248.7% $99.7K 0.0% 48
Y-Intercept Quant New +29.5K — $78.9K 0.0% 48
MARSHALL WACE, LLP Long/Short Reduced -144.8K -75.1% $386.5K 0.0% 44
Qube Research & Technologies Ltd Quant Reduced -81.8K -67.9% $218.3K 0.0% 41

Most significant buyers

By move score, not size.

  • CITADEL ADVISORS LLC New · +51.0K
  • Balyasny Asset Management L.P. New · +11.9K
  • Squarepoint Ops LLC Increased · +37.3K
  • Y-Intercept New · +29.5K
  • RENAISSANCE TECHNOLOGIES LLC Increased · +201.1K

Most significant sellers

By move score, not size.

  • Point72 Asset Management, L.P. Sold Out · -67.4K
  • MILLENNIUM MANAGEMENT LLC Reduced · -599.1K
  • Schonfeld Strategic Advisors Sold Out · -11.3K
  • Brevan Howard Capital Management Sold Out · -15.4K
  • MARSHALL WACE, LLP Reduced · -144.8K

Hedge fund positions

Fund Tier Shares Previous Change Change % Portfolio wt. Action Score
Point72 Asset Management, L.P. 1 0 67.4K -67.4K -100.0% 0.0% Sold Out 59
CITADEL ADVISORS LLC 1 51.0K 0 +51.0K — 0.0% New 58
Balyasny Asset Management L.P. 2 11.9K 0 +11.9K — 0.0% New 57
MILLENNIUM MANAGEMENT LLC 2 60.6K 659.7K -599.1K -90.8% 0.0% Reduced 51
Schonfeld Strategic Advisors 3 0 11.3K -11.3K -100.0% 0.0% Sold Out 51
Brevan Howard Capital Management 3 0 15.4K -15.4K -100.0% 0.0% Sold Out 49
Squarepoint Ops LLC 2 52.4K 15.0K +37.3K +248.7% 0.0% Increased 48
Y-Intercept 4 29.5K 0 +29.5K — 0.0% New 48
MARSHALL WACE, LLP 2 48.1K 192.9K -144.8K -75.1% 0.0% Reduced 44
Qube Research & Technologies Ltd 2 38.6K 120.4K -81.8K -67.9% 0.0% Reduced 41
RENAISSANCE TECHNOLOGIES LLC 1 675.0K 473.9K +201.1K +42.4% 0.0% Increased 38
TWO SIGMA INVESTMENTS, LP 2 622.9K 530.8K +92.1K +17.3% 0.0% Increased 30
ADAR1 Capital Management 3 2.1M 2.2M -45.0K -2.1% 0.3% Reduced 24
Hudson Bay Capital Management 3 955.0K 968.9K -13.9K -1.4% 0.0% Reduced 23
RA Capital Management 1 21.0M 21.0M 0 +0.0% 0.5% Unchanged 28
Alyeska Investment Group, L.P. 2 2.5M 2.5M 0 +0.0% 0.0% Unchanged 20
Boothbay Fund Management 4 273.0K 273.0K 0 +0.0% 0.0% Unchanged 13

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.