KRRO Korro Bio, Inc.

NASDAQ
$13.81

Korro Bio, Inc. (KRRO) 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
+6.67
8 buyers / 7 sellers
MIXED
Funds compared
17
funds with comparable KRRO positions
16 current holders · 15 prior-quarter holders
Net share change
+955.3K
+1.17M added, -214.0K cut
Position activity
2 new 6 increased 6 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
D. E. Shaw & Co., Inc. Quant New +34.2K — $450.9K 0.0% 58
Quadrature Capital Quant Sold Out -20.4K -100.0% $268.3K 0.0% 52
Nantahala Capital Management Event Long/Short Increased +660.0K +100.0% $8.7M 0.5% 52
ADAGE CAPITAL PARTNERS GP, L.L.C. Increased +312.6K +136.9% $4.1M 0.0% 52
Walleye Capital Long/Short Quant New +54.3K — $715.5K 0.0% 51
MILLENNIUM MANAGEMENT LLC Increased +54.8K +86.2% $722.6K 0.0% 48
Trexquant Investment Quant Reduced -44.7K -79.6% $589.5K 0.0% 40
MARSHALL WACE, LLP Long/Short Reduced -15.3K -44.5% $201.4K 0.0% 36
CITADEL ADVISORS LLC Quant Increased +9.5K +30.7% $124.9K 0.0% 34
RENAISSANCE TECHNOLOGIES LLC Quant Reduced -25.7K -18.9% $338.8K 0.0% 32

Most significant buyers

By move score, not size.

  • D. E. Shaw & Co., Inc. New · +34.2K
  • Nantahala Capital Management Increased · +660.0K
  • ADAGE CAPITAL PARTNERS GP, L.L.C. Increased · +312.6K
  • Walleye Capital New · +54.3K
  • MILLENNIUM MANAGEMENT LLC Increased · +54.8K

Most significant sellers

By move score, not size.

  • Quadrature Capital Sold Out · -20.4K
  • Trexquant Investment Reduced · -44.7K
  • MARSHALL WACE, LLP Reduced · -15.3K
  • RENAISSANCE TECHNOLOGIES LLC Reduced · -25.7K
  • Engineers Gate Reduced · -13.5K

Hedge fund positions

Fund Tier Shares Previous Change Change % Portfolio wt. Action Score
D. E. Shaw & Co., Inc. 1 34.2K 0 +34.2K — 0.0% New 58
Quadrature Capital 3 0 20.4K -20.4K -100.0% 0.0% Sold Out 52
Nantahala Capital Management 3 1.3M 660.0K +660.0K +100.0% 0.5% Increased 52
ADAGE CAPITAL PARTNERS GP, L.L.C. 2 541.0K 228.4K +312.6K +136.9% 0.0% Increased 52
Walleye Capital 3 54.3K 0 +54.3K — 0.0% New 51
MILLENNIUM MANAGEMENT LLC 2 118.4K 63.6K +54.8K +86.2% 0.0% Increased 48
Trexquant Investment 3 11.5K 56.2K -44.7K -79.6% 0.0% Reduced 40
MARSHALL WACE, LLP 2 19.1K 34.3K -15.3K -44.5% 0.0% Reduced 36
CITADEL ADVISORS LLC 1 40.4K 30.9K +9.5K +30.7% 0.0% Increased 34
RENAISSANCE TECHNOLOGIES LLC 1 110.5K 136.2K -25.7K -18.9% 0.0% Reduced 32
Engineers Gate 4 10.2K 23.7K -13.5K -56.9% 0.0% Reduced 31
Balyasny Asset Management L.P. 2 951.8K 1.0M -88.3K -8.5% 0.0% Reduced 30
TWO SIGMA INVESTMENTS, LP 2 178.1K 165.5K +12.6K +7.6% 0.0% Increased 28
AQR Capital Management 3 299.0K 267.8K +31.2K +11.7% 0.0% Increased 23
Boothbay Fund Management 4 35.9K 42.0K -6.1K -14.6% 0.0% Reduced 21
Affinity Asset Advisors 2 706.9K 706.9K 0 +0.0% 0.5% Unchanged 22
ADAR1 Capital Management 3 540.1K 540.1K 0 +0.0% 0.4% 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.