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Public ownership evidence

Korro Bio, Inc. Common Stock (KRRO) Ownership Disclosures

Read KRRO insider transactions, institutional 13F filings and Congressional disclosures with report dates, public availability and original receipts.

As of 2026-11-07T14:03:26.246Z

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2026-10-262026-10-26Lynx1 Capital Management LP, Nichols WestonP25,124Not reported

First displayed source row from Recent Form 4 activity. The full bounded history and coverage notes remain below.

The displayed observation date is 2026-10-26 and its public availability date is 2026-10-26. Subtracting those calendar dates gives 0 days of disclosure lag. Historical public research can use the record from the availability date, rather than backdating knowledge to the observation date. The calendar-day difference does not assert an intraday publication time.

This row is code P: a purchase. A purchase code is only one eligibility check. Confirm reporting-owner role, amendment lineage and coverage before treating it as a strategy input.

Open the linked original receipts to verify the row, then inspect a second record before drawing a pattern. This public filing observation supplies source evidence, not a completed copy-trading return.

SEC 0000902664-26-004286 ↗SEC 0000902664-26-004286 ↗SEC 0000902664-26-004286 ↗

Recent Form 4 activity

Inspect all 19 displayed rows: Recent Form 4 activity

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2026-10-262026-10-26Lynx1 Capital Management LP, Nichols WestonP25,124Not reported
2026-10-262026-10-23Lynx1 Capital Management LP, Nichols WestonP2,510Not reported
2026-10-262026-10-22Lynx1 Capital Management LP, Nichols WestonP40,000Not reported
2026-10-262026-10-22Lynx1 Capital Management LP, Nichols WestonP12,175Not reported
2026-09-152026-09-14FORMELA JEAN FRANCOISS6,602Not reported
2026-09-152026-09-14FORMELA JEAN FRANCOISS31,888Not reported
2026-09-152026-09-11FORMELA JEAN FRANCOISS1,750Not reported
2026-09-152026-09-11FORMELA JEAN FRANCOISS8,450Not reported
2026-09-142026-09-11Dolan OliverS5Not reported
2026-09-102026-09-09Dolan OliverS6Not reported
2026-09-102026-09-08Dolan OliverS7,347Not reported
2026-08-292026-08-26FORMELA JEAN FRANCOISS51Not reported
2026-08-292026-08-26FORMELA JEAN FRANCOISS249Not reported
2026-08-222026-08-19FORMELA JEAN FRANCOISS4,884Not reported
2026-08-222026-08-19FORMELA JEAN FRANCOISS23,584Not reported
2026-08-142026-08-11FORMELA JEAN FRANCOISS368Not reported
2026-08-142026-08-11FORMELA JEAN FRANCOISS1,775Not reported
2026-08-142026-08-10Lynx1 Capital Management LP, Nichols WestonP1,462Not reported
2026-08-142026-08-06Lynx1 Capital Management LP, Nichols WestonP5,222Not reported

90-day public availability window, up to 50 records.

Recent institutional filing receipts

Inspect all 50 displayed rows: Recent institutional filing receipts

These are raw ticker-matched positions in recent 13F receipts, including amendments. They are not deduplicated current ownership totals. Open the manager profile to inspect its effective filing book.

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CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM2026-06-302026-08-2593$1,226None
CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM2026-06-302026-08-251,226$93,000None
Kalehua Capital Management LLC2026-06-302026-08-20405,040$5,338,427None
Nantahala Capital Management, LLC2026-06-302026-08-20660,036$8,699,274None
MERCER GLOBAL ADVISORS INC /ADV2026-06-302026-08-2012,888$169,864None
JPL Wealth Management, LLC2026-06-302026-08-153$40None
Susquehanna Portfolio Strategies, LLC2026-06-302026-08-1513,500$177,930None
Basecamp Wealth Advisors LLC2026-06-302026-08-1545$593None
ADAR1 Capital Management, LLC2026-06-302026-08-15540,054$7,117,912None
XTX Topco Ltd2026-06-302026-08-1547,819$630,254None
CHARLES SCHWAB INVESTMENT MANAGEMENT INC2026-06-302026-08-1524,110$317,770None
Sixth Street Partners Management Company, L.P.2026-06-302026-08-1524,110$317,770None
OSAIC HOLDINGS, INC.2026-06-302026-08-154$53None
OSAIC HOLDINGS, INC.2026-06-302026-08-15130$1,713None
Trexquant Investment LP2026-06-302026-08-1511,482$151,333None
Engineers Gate Manager LP2026-06-302026-08-1510,217$134,660None
Venrock Adviser, LLC2026-06-302026-08-151,009,500$13,305,210None
BOOTHBAY FUND MANAGEMENT, LLC2026-06-302026-08-1535,853$472,543None
Legal & General Group Plc2026-06-302026-08-151,082$14,261None
SUSQUEHANNA INTERNATIONAL GROUP, LLP2026-06-302026-08-1529,100$383,538Call
SUSQUEHANNA INTERNATIONAL GROUP, LLP2026-06-302026-08-1518,200$239,876Put
MILLENNIUM MANAGEMENT LLC2026-06-302026-08-15118,434$1,560,960None
TCG Crossover Management, LLC2026-06-302026-08-15416,301$5,486,847None
Balyasny Asset Management L.P.2026-06-302026-08-15951,783$12,544,500None
Cerity Partners LLC2026-06-302026-08-152,112$27,836None
Cerity Partners LLC2026-06-302026-08-158,682$114,428None
ADAGE CAPITAL PARTNERS GP, L.L.C.2026-06-302026-08-15540,968$7,129,958None
AQR CAPITAL MANAGEMENT LLC2026-06-302026-08-15133$1,753None
AQR CAPITAL MANAGEMENT LLC2026-06-302026-08-1516$211None
AQR CAPITAL MANAGEMENT LLC2026-06-302026-08-1522$290None
AQR CAPITAL MANAGEMENT LLC2026-06-302026-08-1511$145None
AQR CAPITAL MANAGEMENT LLC2026-06-302026-08-15586$7,723None
AQR CAPITAL MANAGEMENT LLC2026-06-302026-08-151,726$22,749None
AQR CAPITAL MANAGEMENT LLC2026-06-302026-08-155,453$71,871None
AQR CAPITAL MANAGEMENT LLC2026-06-302026-08-15291,027$3,835,736None
ROYAL BANK OF CANADA2026-06-302026-08-15334$4,000None
ALLIANCEBERNSTEIN L.P.2026-06-302026-08-1512,180$137,878None
Nantahala Capital Management, LLC2026-06-302026-08-15660,036$8,699,274None
D. E. Shaw & Co., Inc.2026-06-302026-08-1534,213$450,927None
CITADEL ADVISORS LLC2026-06-302026-08-1512,400$163,432Put
CITADEL ADVISORS LLC2026-06-302026-08-1540,054$527,912None
CITADEL ADVISORS LLC2026-06-302026-08-1571,000$935,780Call
CITADEL ADVISORS LLC2026-06-302026-08-15336$4,428None
NEA Management Company, LLC2026-06-302026-08-151,297,893$17,106,230None
Driehaus Capital Management LLC2026-06-302026-08-15450,045$5,931,593None
72 Investment Holdings, LLC2026-06-302026-08-15276,831$3,648,633None
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.2026-06-302026-08-155,130$67,613None
TWO SIGMA INVESTMENTS, LP2026-06-302026-08-15178,071$2,346,976None
GOLDMAN SACHS GROUP INC2026-06-302026-08-15116,983$1,541,836None
HSBC HOLDINGS PLC2026-06-302026-08-1517,812$232,803None

90-day public filing window, up to 50 source positions.

CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM ↗CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM ↗Kalehua Capital Management LLC ↗Nantahala Capital Management, LLC ↗MERCER GLOBAL ADVISORS INC /ADV ↗JPL Wealth Management, LLC ↗Susquehanna Portfolio Strategies, LLC ↗Basecamp Wealth Advisors LLC ↗ADAR1 Capital Management, LLC ↗XTX Topco Ltd ↗

Recent Congressional disclosures

No matching Congressional transactions were returned in this source preview.

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Bounded public source preview, up to 25 disclosed events.

How to read the disclosure dates

The tables report different things: insider transactions, institutional positions and Congressional transaction ranges. Read each table with its source dates and units. They cannot be added into a combined ownership percentage.

  1. Company insiders

    SEC Form 4 purchases, sales and awards report transactions and their public filing availability.

  2. Institutional managers

    13F reports disclose delayed quarter-end positions. They are not a record of trades between quarters.

  3. Congressional filers

    Periodic transaction reports disclose transaction dates and amount brackets. Public filing dates determine what researchers could know.

Institutional source directory ↗Congressional source directory ↗

Read the transaction codes

Awards use transaction code A, purchases P and sales S. An acquisition from an award is not the same as an open-market purchase. Joint filers may share a transaction. Use original receipts and availability dates to interpret the events.