Cormorant Asset Management, LP KRRO — KORRO BIO INC

Ownership history in Cormorant Asset Management, LP  ·  7 quarters on record

AI Ownership Summary

Cormorant Asset Management, LP reported KORRO BIO INC (KRRO) in 7 quarterly 13F filings from 2023 Q4 through 2025 Q3. Peak portfolio weight reached 2.09% in 2024 Q1. The latest visible filing shows KRRO at 1.54% of the fund.

This page tracks quarterly shares, estimated market value, portfolio weight, filing dates, and disclosure-aligned stock prices directly from SEC EDGAR 13F filings.

What this KRRO ownership page tells you

This page is designed to answer the real investor question behind a 13F filing: how meaningful was Cormorant Asset Management, LP's position in KORRO BIO INC, and how did that conviction change over time? You can read the holding window, peak weight, latest reported size, disclosure timing, and quarter-by-quarter changes without piecing the story together from raw SEC rows.

Freshest filing
Latest Reported Filing
2025 Q3

KRRO was reported at 1.54% of portfolio in the most recent visible filing.

High-water mark
Peak Conviction
2.09% in 2024 Q1

Peak weight helps separate a token disclosure from a real conviction holding the fund genuinely cared about.

Time in book
Holding Window
2023 Q4 to 2025 Q3

Longer holding windows often tell a very different story from short-lived tactical trades or one-quarter experiments.

Decision context
Why It Matters
Position size beats headlines

Knowing that a fund owned a stock is useful. Knowing whether it was a 0.20% placeholder or a true high-conviction position is where the signal actually starts.

KRRO stock page Cormorant Asset Management, LP fund profile Cormorant Asset Management, LP full holdings
How Cormorant Asset Management, LP held KRRO — position size vs. price
% of Fund (quarterly)    KRRO price (quarter-end, indexed to 100)    SPY (indexed to 100)    QQQ (indexed to 100)
📋 Quarterly Holdings History 7 quarters  ▾
Quarter Action Sold % After 3M Timing Shares Change Chg % % of Fund Mkt Value Filed Price (Filed)
2025 Q3 UNCHANGED — — — 465,000 — 0% 1.54% $22.3M 2025-11-14 $6.07
2025 Q2 ADDED — — — 465,000 +84,697 +22.3% 0.43% $5.8M 2025-08-14 $19.88
2025 Q1 ADDED — — — 380,303 +114,477 +43.1% 0.50% $6.6M 2025-05-15 $14.48
2024 Q3 UNCHANGED — — — 265,826 — 0% 0.47% $8.9M 2024-11-14 $49.70
2024 Q2 REDUCED 49.8% -1.3% ✅ 265,826 -263,344 -49.8% 0.52% $9.0M 2024-08-14 $39.71
2024 Q1 UNCHANGED — — — 529,170 — 0% 2.09% $47.6M 2024-05-15 $52.77
2023 Q4 INITIATED — — — 529,170 — — 1.21% $25.4M 2024-02-14 $54.71

🏢 Other funds also holding KRRO

As of 2026 Q1 — sorted by position size

North Star Investment Management Corp. 3Y 7Y 0.0% Versant Capital Management, Inc 3Y 7Y 0.0% GAMMA Investing LLC 0.0% True Wealth Design, LLC 3Y 0.0% Fortitude Family Office, LLC 0.0% Sterling Capital Management LLC 3Y 7Y 0.0% Root Financial Partners, LLC 0.0% SJS Investment Consulting Inc. 3Y 0.0% IFP Advisors, Inc 3Y 7Y 0.0% Farther Finance Advisors, LLC 0.0%

FAQ About Cormorant Asset Management, LP and KRRO

These are the practical questions this page is built to answer before you even open the full history table.

How long has Cormorant Asset Management, LP reported owning KRRO?

Cormorant Asset Management, LP reported KRRO across 7 quarterly 13F filings, from 2023 Q4 through 2025 Q3.

What was the largest reported KRRO position in Cormorant Asset Management, LP's portfolio?

The largest reported portfolio weight for KRRO was 2.09% in 2024 Q1.

What is the latest reported KRRO position on this page?

The most recent filing on this page is 2025 Q3, when Cormorant Asset Management, LP reported 465,000 shares, equal to 1.54% of portfolio, with an estimated market value of $22.3M.

What does the chart on this KRRO ownership page compare?

The chart compares Cormorant Asset Management, LP's quarterly KRRO portfolio weight with the stock's indexed share price, so you can see whether the fund was building, trimming, or holding the position as price moved.

How well did Cormorant Asset Management, LP time their KRRO position?

Based on 13F filing dates vs. subsequent KRRO price moves, Cormorant Asset Management, LP correctly timed 1 out of 4 reported position changes (25%). The annualised alpha on KRRO relative to SPY over the holding period was -92.9%.

← Back to Cormorant Asset Management, LP Holdings