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MBX Biosciences Ownership | Who Owns MBX Biosciences?

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MBX Biosciences Ownership Summary

MBX Biosciences is owned by 12.54% institutional investors, 2.70% insiders, and 84.75% retail investors. Frazier life sciences management is the largest institutional shareholder, holding 18.22% of MBX shares. Polar Capital Biotech S Inc is the top mutual fund, with 3.20% of its assets in MBX Biosciences shares.

MBX Ownership Benchmark

TypeName% Inst% Insiders% Retail
StockMBX Biosciences12.54%2.70%84.75%
SectorHealthcare Stocks 50.53%12.40%37.07%
IndustryBiotech Stocks 48.96%12.12%38.92%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

HolderShares% HoldingValue
Frazier life sciences management6.65M18.22%$198.56M
Orbimed advisors3.64M9.97%$108.59M
Nea management company3.61M9.90%$107.89M
Wellington management group llp3.19M8.74%$95.28M
Blackrock funding, inc. /de2.94M8.06%$87.80M
Fmr2.94M8.04%$87.66M
Deep track capital, lp2.76M7.55%$82.31M
Nvp associates2.14M5.85%$63.77M
Vanguard group1.82M5.32%$57.33M
Polar capital1.62M4.44%$48.42M

Top Institutional Shareholders by % of Total Assets

HolderShares% AssetsValue
Nvp associates2.14M36.20%$63.77M
Nea management company3.61M6.13%$107.89M
Frazier life sciences management6.65M5.11%$198.56M
Parkman healthcare partners800.04K2.46%$23.88M
Orbimed advisors3.64M2.16%$108.59M
Aaron wealth advisors1.17M1.98%$34.87M
Kynam capital management, lp934.80K1.72%$27.90M
Caligan partners lp848.59K1.69%$25.33M
Cormorant asset management, lp1.12M1.68%$33.43M
Braidwell lp1.49M1.49%$44.55M

Top Buyers

HolderShares% AssetsChange
Fmr2.94M0.00%2.92M
Polar capital1.62M0.17%1.62M
Aaron wealth advisors1.17M1.98%1.10M
Caligan partners lp848.59K1.69%848.59K
Braidwell lp1.49M1.49%473.87K

Top Sellers

HolderShares% AssetsChange
Ecor1 capital777.00K0.98%-1.35M
Franklin resources---1.31M
Bioimpact capital---1.29M
Citadel advisors---932.83K
Point72 asset management---680.61K

New Positions

HolderShares% AssetsChangeValue
Polar capital1.62M0.17%1.62M$48.42M
Caligan partners lp848.59K1.69%848.59K$25.33M
Candriam s.c.a.294.37K0.05%294.37K$8.79M
Baker bros. advisors lp277.78K0.04%277.78K$4.86M
Longaeva partners224.43K0.57%224.43K$3.93M

Sold Out

HolderChange
Ifp advisors-1.00
True wealth design-2.00
Mai capital management-7.00
Sbi securities-9.00
Versant capital management-24.00

Institutional Ownership Trends

DateHoldingsChange %SharesChange %OwnershipChange %Increased PositionChange %Decreased PositionChange %
Mar 31, 202653-63.19%4,578,687-90.55%120.06%31-68.37%12-53.85%
Dec 31, 202581-39.10%19,853,942-58.46%580.30%63-14.86%9-70.00%
Sep 30, 202513042.86%47,138,46527.96%1401.16%7321.67%30100.00%
Jun 30, 20259115.19%36,839,3653.29%1100.97%60-24.05%15-
Mar 31, 20251-1,579,207-4-1---

Top Mutual Funds Shareholders

HolderShares% HoldingChange
Polar Capital Biotech S Inc1.52M3.20%-
Vanguard Morn Total Stk Mkt Idx Investor1.14M2.39%350.00
Vanguard Total Stock Mkt Idx Inv1.14M2.39%350.00
Vanguard MStar Total Stk Mkt Idx Invest1.14M2.38%4.04K
Eventide Healthcare & Life Sciences I890.00K1.87%-
iShares Russell 2000 ETF783.34K1.65%-13.92K
Fidelity Advisor Biotechnology I614.60K1.29%310.00K
Fidelity Select Health Care600.00K1.26%-
T. Rowe Price Health Sciences586.31K1.23%-103.90K
Fidelity Stock Selector Small Cap419.90K0.88%-

Recent Insider Transactions

DateNameRoleActivityValue
Aug 04, 2026Azoulay Salomon Chief Medical OfficerSell$24.33K
May 08, 2026Azoulay Salomon Chief Medical OfficerSell$574.61K
May 08, 2026Azoulay Salomon Chief Medical OfficerSell$2.11M
May 06, 2026Azoulay Salomon Chief Medical OfficerSell$6.82K
May 06, 2026Hawryluk P. Kent President & CEOSell$17.93K

Insider Transactions Trends

DateBuySell
2026 Q3-1
2026 Q2-4
2026 Q11-
2025 Q42-
2025 Q31-

MBX Ownership FAQ

Who Owns MBX Biosciences?

MBX Biosciences shareholders are primarily institutional investors at 12.54%, followed by 2.70% insiders and 84.76% retail investors. The average institutional ownership in MBX Biosciences's industry, Biotech Stocks , is 48.96%, which MBX Biosciences falls below.

Who owns the most shares of MBX Biosciences?

MBX Biosciences’s largest shareholders are Frazier life sciences management (6.65M shares, 18.22%), Orbimed advisors (3.64M shares, 9.97%), and Nea management company (3.61M shares, 9.90%). Together, they hold 38.09% of MBX Biosciences’s total shares outstanding.

Does Blackrock own MBX Biosciences?

BlackRock is not among the top 10 institutional shareholders of MBX Biosciences.

Who is MBX Biosciences’s biggest shareholder by percentage of total assets invested?

Nvp associates is MBX Biosciences’s biggest shareholder by percentage of total assets invested, with 36.20% of its assets in 2.14M MBX Biosciences shares, valued at 63.77M$.

Who is the top mutual fund holder of MBX Biosciences shares?

Polar Capital Biotech S Inc is the top mutual fund holder of MBX Biosciences shares, with 3.20% of its total shares outstanding invested in 1.52M MBX Biosciences shares.

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