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As of the latest SEC filings, Korro Bio, Inc. (KRRO) is held by 90 institutional funds. The largest fund shareholder is VANGUARD TOTAL STOCK MARKET INDEX FUND (VTI), holding an estimated $2,638,261.84 in market value, representing a significant portion of its portfolio.

Funds holding Korro Bio, Inc. (KRRO)

Source: SEC Form N-PORT institutional portfolio disclosures

Ticker:
KRRO
CIK:
0001703647
Showing top 25 of 90 institutional funds
Fund Type Manager Weight Market Value Shares
Report Date
Filing Date
VTI
VANGUARD TOTAL STOCK MARKET INDEX FUND
ETF Vanguard 0.00% $2,638,261.84 233,062 Mar 31, 2026 May 28, 2026
VTI
VANGUARD TOTAL STOCK MARKET INDEX FUND
ETF Vanguard 0.00% $2,444,828.57 1,246,700 Mar 31, 2026 May 28, 2026
IWM
iShares Russell 2000 ETF
ETF BlackRock / iShares 0.00% $1,821,603.08 160,919 Mar 31, 2026 May 28, 2026
VSTCX
VANGUARD STRATEGIC SMALL-CAP EQUITY FUND
MF Vanguard 0.04% $1,000,008.80 88,340 Mar 31, 2026 May 28, 2026
FSSNX
Fidelity Small Cap Index Fund
MF Fidelity 0.00% $884,849.57 65,593 Apr 30, 2026 Jun 26, 2026
VEMPX
VANGUARD EXTENDED MARKET INDEX FUND
ETF Vanguard 0.00% $879,536.25 448,505 Mar 31, 2026 May 28, 2026
VEMPX
VANGUARD EXTENDED MARKET INDEX FUND
ETF Vanguard 0.00% $789,354.92 69,731 Mar 31, 2026 May 28, 2026
LFSC
F/m Emerald Life Sciences Innovation ETF
ETF Independent / Boutique 0.79% $751,028.95 61,915 Feb 28, 2026 Apr 28, 2026
IWN
iShares Russell 2000 Value ETF
ETF BlackRock / iShares 0.01% $631,497.52 55,786 Mar 31, 2026 May 28, 2026
FSMAX
Fidelity Extended Market Index Fund
MF Fidelity 0.00% $444,103.56 36,612 Feb 28, 2026 Apr 24, 2026
FBIOX
Select Biotechnology Portfolio
MF Fidelity 0.01% $398,664.58 32,866 Feb 28, 2026 Apr 24, 2026
VTWO
VANGUARD RUSSELL 2000 INDEX FUND
ETF Vanguard 0.00% $396,481.18 32,686 Feb 28, 2026 Apr 28, 2026
IWC
iShares Micro-Cap ETF
ETF BlackRock / iShares 0.02% $189,327.00 16,725 Mar 31, 2026 May 28, 2026
SWSSX
Schwab Small-Cap Index Fund
MF Charles Schwab 0.00% $180,469.22 13,378 Apr 30, 2026 Jun 25, 2026
DFAS
Dimensional U.S. Small Cap ETF
ETF Dimensional Fund Advisors 0.00% $178,310.82 13,218 Apr 30, 2026 Jun 29, 2026
VHCIX
VANGUARD HEALTH CARE INDEX FUND
ETF Vanguard 0.00% $167,430.39 13,803 Feb 28, 2026 Apr 28, 2026
ITOT
iShares Core S&P Total U.S. Stock Market ETF
ETF BlackRock / iShares 0.00% $157,427.24 13,907 Mar 31, 2026 May 28, 2026
FSKAX
Fidelity Total Market Index Fund
MF Fidelity 0.00% $137,226.69 11,313 Feb 28, 2026 Apr 24, 2026
-
Master Small Cap Index Series
ETF Independent / Boutique 0.00% $117,060.12 10,341 Mar 31, 2026 May 28, 2026
FCFMX
Fidelity Series Total Market Index Fund
MF Fidelity 0.00% $112,699.83 9,291 Feb 28, 2026 Apr 24, 2026
TRHBX
Nuveen Small Cap Blend Index Fund
MF TIAA / Nuveen 0.00% $111,737.67 8,283 Apr 30, 2026 Jun 24, 2026
FISVX
Fidelity Small Cap Value Index Fund
MF Fidelity 0.01% $93,944.68 8,299 Mar 31, 2026 May 26, 2026
-
EQ/2000 Managed Volatility Portfolio
ETF Independent / Boutique 0.00% $82,964.28 7,329 Mar 31, 2026 May 26, 2026
PEXMX
T. Rowe Price Extended Equity Market Index Fund
MF T. Rowe Price 0.01% $73,580.00 6,500 Mar 31, 2026 May 28, 2026
FNCMX
Fidelity Nasdaq Composite Index Fund
MF Fidelity 0.00% $65,732.47 5,419 Feb 28, 2026 Apr 24, 2026
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