MBX Biosciences Ownership | Who Owns MBX Biosciences?

MBX Biosciences Ownership Summary

MBX Biosciences is owned by 58.05% institutional investors, 2.84% insiders, and 39.11% retail investors. Frazier life sciences management is the largest institutional shareholder, holding 19.89% of MBX shares.

MBX Ownership Benchmark

Type	Name	% Inst	% Insiders	% Retail
Stock	MBX Biosciences	58.05%	2.84%	39.11%
Sector	Healthcare Stocks	232.20%	10.74%	-142.94%
Industry	Biotech Stocks	382.11%	10.55%	-292.66%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Frazier life sciences management	6.65M	19.89%	$116.41M
Wellington management group llp	4.82M	14.42%	$84.41M
Orbimed advisors	4.00M	11.97%	$70.05M
Nea management company	3.61M	10.81%	$63.25M
Deep track capital, lp	3.15M	9.42%	$55.13M
Blackrock funding, inc. /de	2.92M	8.54%	$92.09M
Nvp associates	2.14M	6.39%	$37.39M
Ecor1 capital	2.12M	6.35%	$37.16M
Kynam capital management, lp	2.00M	5.98%	$35.00M
Vanguard group	1.82M	5.32%	$57.33M

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
Nvp associates	2.14M	22.51%	$37.39M
Frazier life sciences management	6.65M	3.49%	$116.41M
Nea management company	3.61M	3.47%	$63.25M
Kynam capital management, lp	2.00M	2.61%	$35.00M
Ecor1 capital	2.12M	1.78%	$37.16M
Orbimed advisors	4.00M	1.65%	$70.05M
Deep track capital, lp	3.15M	1.54%	$55.13M
Cormorant asset management, lp	1.23M	1.48%	$21.44M
Parkman healthcare partners	773.30K	1.41%	$13.53M
Opaleye management	253.00K	0.63%	$4.43M

Top Buyers

Holder	Shares	% Assets	Change
Wellington management group llp	4.82M	0.01%	2.56M
Kynam capital management, lp	2.00M	2.61%	2.00M
Ecor1 capital	2.12M	1.78%	973.81K
Blackrock funding, inc. /de	2.92M	0.00%	962.29K
Deep track capital, lp	3.15M	1.54%	961.41K

Top Sellers

Holder	Shares	% Assets	Change
Franklin resources	-	-	-1.31M
Bioimpact capital	-	-	-1.29M
Price t rowe associates inc /md/	954.73K	0.00%	-392.18K
Ra capital management	-	-	-377.84K
Schonfeld strategic advisors	282.68K	0.03%	-348.74K

New Positions

Holder	Shares	% Assets	Change	Value
Kynam capital management, lp	2.00M	2.61%	2.00M	$35.00M
Rock springs capital management lp	282.62K	0.29%	282.62K	$4.95M
Baker bros. advisors lp	277.78K	0.04%	277.78K	$4.86M
Longaeva partners	224.43K	0.57%	224.43K	$3.93M
Goelzer investment management	221.67K	0.32%	221.67K	$6.99M

Sold Out

Holder	Change
Rise advisors	-68.00
Comerica bank	-76.00
Washington trust advisors	-83.00
Srs capital advisors	-398.00
Raymond james financial	-761.00

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
Dec 31, 2025	81	-39.10%	19,853,942	-58.46%	58	0.30%	63	-14.86%	9	-70.00%
Sep 30, 2025	130	42.86%	47,138,465	27.96%	140	1.16%	73	21.67%	30	100.00%
Jun 30, 2025	91	15.19%	36,839,365	3.29%	110	0.97%	60	-24.05%	15	-
Mar 31, 2025	1	-	1,579,207	-	4	-	1	-	-	-

Recent Insider Transactions

Date	Name	Role	Activity	Value
Oct 20, 2025	Hawryluk P. Kent	President & CEO	Buy	$272.79K
Oct 17, 2025	Hoerter Steven L.	-	Buy	$264.98K
Sep 26, 2025	Heron Patrick J		Buy	$12.00M
Apr 08, 2025	Pescovitz Ora H.	-	Buy	$45.31K

Insider Transactions Trends

Date	Buy	Sell
2026 Q1	-	-
2025 Q4	2	-
2025 Q3	1	-
2025 Q2	1	-

MBX Ownership FAQ

Who Owns MBX Biosciences?

MBX Biosciences shareholders are primarily institutional investors at 58.05%, followed by 2.84% insiders and 39.11% retail investors. The average institutional ownership in MBX Biosciences's industry, Biotech Stocks , is 382.11%, 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, 19.89%), Wellington management group llp (4.82M shares, 14.42%), and Orbimed advisors (4M shares, 11.97%). Together, they hold 46.28% 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 22.51% of its assets in 2.14M MBX Biosciences shares, valued at 37.39M$.

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