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Prime Medicine Ownership | Who Owns Prime Medicine?

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Prime Medicine Ownership Summary

Prime Medicine is owned by 45.45% institutional investors, 23.64% insiders, and 30.91% retail investors. Alphabet is the largest institutional shareholder, holding 11.66% of PRME shares. T. Rowe Price Small-Cap Value is the top mutual fund, with 2.65% of its assets in Prime Medicine shares.

PRME Ownership Benchmark

TypeName% Inst% Insiders% Retail
StockPrime Medicine45.45%23.64%30.91%
SectorHealthcare Stocks 488.17%11.08%-399.26%
IndustryBiotech Stocks 306.68%11.10%-217.78%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

HolderShares% HoldingValue
Alphabet15.06M11.66%$37.20M
T. rowe price investment management6.48M5.02%$16.02M
Blackrock funding, inc. /de4.49M3.47%$11.08M
Ark investment management2.32M1.80%$5.74M
Redmile group2.07M1.61%$5.12M
Mwg management1.79M1.39%$4.43M
Nikko asset management americas1.59M1.23%$3.89M
Casdin capital1.57M1.21%$3.87M
Greenwich wealth management846.20K0.66%$2.09M
Farallon capital management750.00K0.58%$1.85M

Top Institutional Shareholders by % of Total Assets

HolderShares% AssetsValue
Mwg management1.79M8.53%$4.43M
Alphabet15.06M1.74%$37.20M
Redmile group2.07M0.55%$5.12M
Casdin capital1.57M0.35%$3.87M
Chelsea counsel208.21K0.26%$514.28K
Green alpha advisors78.99K0.19%$195.12K
Palumbo wealth management183.36K0.14%$452.89K
Diametric capital, lp105.53K0.14%$260.66K
Greenwich wealth management846.20K0.10%$2.09M
Ark investment management2.32M0.04%$5.74M

Top Buyers

HolderShares% AssetsChange
T. rowe price investment management6.48M0.01%2.34M
Casdin capital1.57M0.35%1.20M
Fred alger management383.19K0.00%383.19K
Blackrock funding, inc. /de4.49M0.00%179.62K
Xtx topco133.49K0.01%133.49K

Top Sellers

HolderShares% AssetsChange
Nikko asset management americas1.59M0.04%-1.34M
Baker bros. advisors lp---1.03M
Westwood group---883.13K
Ark investment management2.32M0.04%-772.50K
Samsara biocapital---405.23K

New Positions

HolderShares% AssetsChangeValue
Fred alger management383.19K0.00%383.19K$946.49K
Diametric capital, lp105.53K0.14%105.53K$260.66K
Prelude capital management41.29K0.01%41.29K$101.98K
Kingsview wealth management25.00K0.00%25.00K$61.75K
Jtc employer solutions trustee13.25K0.00%13.25K$33.00K

Sold Out

HolderChange
Federated hermes-6.00
Cordant-33.00
Massmutual trust co fsb/adv-104.00
Parallel advisors-110.00
Allworth financial lp-141.00

Institutional Ownership Trends

DateHoldingsChange %SharesChange %OwnershipChange %Increased PositionChange %Decreased PositionChange %
Jun 30, 20251250.81%58,714,059-1.59%452.19%654.84%33-5.71%
Mar 31, 2025124-4.62%60,152,185-4.70%451.64%61-12.86%359.38%
Dec 31, 202413211.86%64,335,371-6.37%531.64%7235.85%326.67%
Sep 30, 2024118-4.07%68,711,038-0.26%571.72%53-24.29%30-
Jun 30, 20241235.13%68,888,4713.34%571.42%7011.11%30-9.09%

Top Mutual Funds Shareholders

HolderShares% HoldingChange
T. Rowe Price Small-Cap Value3.57M2.65%-4.18K
Vanguard Total Stock Mkt Idx Inv2.98M2.22%886.14K
ARK Genomic Revolution2.27M1.69%-231.65K
ARK Genomic Revolution ETF2.25M1.67%-13.47K
Vanguard US Total Market Shares ETF2.16M1.65%-
T. Rowe Price U.S. SC Value Eq Tr-D2.12M1.58%1.37M
iShares Russell 2000 ETF1.40M1.04%-26.57K
Nikko AM ARK Disruptive Innovation A USD1.31M1.00%-
Nikko AM ARK Pstv Chg Innovt P JPY Acc1.25M0.93%-6.92K
US Small-Cap Growth II Equity Comp1.13M0.86%-15.60K

Recent Insider Transactions

DateNameRoleActivityValue
Aug 01, 2025GV 2021 GP, L.L.C.-Buy$4.95M
Aug 01, 2025NELSEN ROBERT Buy$10.00M
Aug 01, 2025ARCH Venture Partners XII, LLC-Buy$10.00M
Aug 01, 2025ARCH Venture Partners X, LLC-Buy$10.00M
Jun 30, 2025Liu David R.-Buy$52.83K

Insider Transactions Trends

DateBuySell
2025 Q33-
2025 Q27-
2025 Q1--
2024 Q4--
2024 Q2--

PRME Ownership FAQ

Who Owns Prime Medicine?

Prime Medicine shareholders are primarily institutional investors at 45.45%, followed by 23.64% insiders and 30.91% retail investors. The average institutional ownership in Prime Medicine's industry, Biotech Stocks , is 306.68%, which Prime Medicine falls below.

Who owns the most shares of Prime Medicine?

Prime Medicine’s largest shareholders are Alphabet (15.06M shares, 11.66%), T. rowe price investment management (6.48M shares, 5.02%), and Blackrock funding, inc. /de (4.49M shares, 3.47%). Together, they hold 20.15% of Prime Medicine’s total shares outstanding.

Does Blackrock own Prime Medicine?

BlackRock is not among the top 10 institutional shareholders of Prime Medicine.

Who is Prime Medicine’s biggest shareholder by percentage of total assets invested?

Mwg management is Prime Medicine’s biggest shareholder by percentage of total assets invested, with 8.53% of its assets in 1.79M Prime Medicine shares, valued at 4.43M$.

Who is the top mutual fund holder of Prime Medicine shares?

T. Rowe Price Small-Cap Value is the top mutual fund holder of Prime Medicine shares, with 2.65% of its total shares outstanding invested in 3.57M Prime Medicine shares.

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