Prime Medicine Ownership | Who Owns Prime Medicine?


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Prime Medicine Ownership Summary


Prime Medicine is owned by 36.30% institutional investors, 23.76% insiders, and 39.94% retail investors. Alphabet is the largest institutional shareholder, holding 11.13% of PRME shares. ARK Genomic Revolution ETF is the top mutual fund, with 2.73% of its assets in Prime Medicine shares.

PRME Ownership Benchmark


TypeName% Inst% Insiders% Retail
StockPrime Medicine36.30%23.76%39.94%
SectorHealthcare Stocks 35.42%11.83%52.76%
IndustryBiotech Stocks 35.46%11.78%52.76%

Institutional Shareholders


Top Institutional Shareholders by Total Shares

HolderShares% HoldingValue
Alphabet16.56M11.13%$57.64M
Blackrock funding, inc. /de8.50M5.72%$29.59M
State street6.35M4.27%$22.08M
Ark investment management6.25M4.20%$21.74M
Vanguard group6.47M4.03%$22.44M
T. rowe price investment management5.48M3.69%$19.08M
Balyasny asset management4.12M2.77%$14.35M
Ra capital management3.00M2.32%$16.62M
Casdin capital3.17M2.13%$11.02M
Woodline partners lp3.00M2.02%$10.45M

Top Institutional Shareholders by % of Total Assets

HolderShares% AssetsValue
Mwg management1.79M12.21%$9.93M
Alphabet16.56M1.44%$57.64M
Casdin capital3.17M0.83%$11.02M
Green alpha advisors191.17K0.66%$665.27K
Ecor1 capital1.54M0.41%$8.55M
Redmile group1.59M0.37%$5.54M
Elevate capital advisors151.07K0.34%$525.72K
Chelsea counsel227.00K0.34%$787.69K
Ra capital management3.00M0.20%$16.62M
Ark investment management6.25M0.17%$21.74M

Top Buyers

HolderShares% AssetsChange
Ra capital management3.00M0.20%3.00M
Redmile group1.59M0.37%1.59M
Vanguard group6.47M0.00%1.55M
Ecor1 capital1.54M0.41%1.54M
State street6.35M0.00%1.25M

Top Sellers

HolderShares% AssetsChange
Baker bros. advisors lp---1.03M
Westwood group---883.13K
Goldman sachs group970.42K0.00%-785.34K
Point72 asset management---551.03K
Morgan stanley639.46K0.00%-530.44K

New Positions

HolderShares% AssetsChangeValue
Ra capital management3.00M0.20%3.00M$16.62M
Adage capital partners gp771.36K0.01%771.36K$4.27M
Vanguard fiduciary trust717.00K0.00%717.00K$2.50M
Man group189.59K0.00%189.59K$1.05M
Ikarian capital150.00K0.08%150.00K$831.00K

Sold Out

HolderChange
Larson financial group-6.00
Federated hermes-6.00
Cordant-33.00
Massmutual trust co fsb/adv-104.00
Parallel advisors-110.00

Institutional Ownership Trends


DateHoldingsChange %SharesChange %OwnershipChange %Increased PositionChange %Decreased PositionChange %
Mar 31, 2026118-37.23%53,995,578-44.33%360.99%75-31.82%23-43.90%
Dec 31, 2025124-29.55%65,805,123-28.75%400.80%77-34.19%22-29.03%
Sep 30, 202516833.33%92,064,58256.73%713.45%11069.23%31-8.82%
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%

Top Mutual Funds Shareholders


HolderShares% HoldingChange
ARK Genomic Revolution ETF4.93M2.73%208.46K
ARK Genomic Revolution4.65M2.57%-142.94K
State Street® SPDR® S&P® Biotech ETF4.47M2.48%-44.65K
Vanguard Total Stock Mkt Idx Inv3.12M1.73%-
Vanguard US Total Market Shares ETF2.16M1.65%-
iShares Russell 2000 ETF2.44M1.35%20.54K
Amova ARK Pstv Chg Innovt P JPY Acc2.33M1.29%-48.45K
Nikko AM ARK Disruptive Innovation A USD1.31M1.00%-
Nikko AM ARK Pstv Chg Innovt P JPY Acc1.25M0.93%-6.92K
T. Rowe Price New Horizons1.13M0.86%-15.27K

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
2026 Q2--
2026 Q1--
2025 Q34-
2025 Q27-
2025 Q1--

PRME Ownership FAQ


Who Owns Prime Medicine?

Prime Medicine shareholders are primarily institutional investors at 36.30%, followed by 23.76% insiders and 39.94% retail investors. The average institutional ownership in Prime Medicine's industry, Biotech Stocks , is 35.46%, which Prime Medicine exceeds.

Who owns the most shares of Prime Medicine?

Prime Medicine’s largest shareholders are Alphabet (16.56M shares, 11.13%), Blackrock funding, inc. /de (8.5M shares, 5.72%), and State street (6.35M shares, 4.27%). Together, they hold 21.11% 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 12.21% of its assets in 1.79M Prime Medicine shares, valued at 9.93M$.

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

ARK Genomic Revolution ETF is the top mutual fund holder of Prime Medicine shares, with 2.73% of its total shares outstanding invested in 4.93M Prime Medicine shares.

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