MBX Biosciences, Inc. - Common Stock, par value $0.0001 per share (MBX)

Historical Holders from Q3 2024 to Q3 2025

Symbol
MBX on Nasdaq
CUSIP
55287L101
Type / Class
Equity / Common Stock, par value $0.0001 per share
Shares outstanding
46.4M
All holders as of September 30, 2025
Q3 2025
Total 13F shares, excl. options
47.8M
Holdings value
$836M
% of all portfolios
0.003%
Grand Portfolio weight change
+0%
Number of holders
115
Number of buys
66
Number of sells
-39
Average Value change %
+0%
Average buys %
+0.001%
Average sells %
-0.001%
Reported Shares, Excluding Options vs Price
Reported Value, Excluding Options
Total Investors

Significant Owners of MBX Biosciences, Inc. - Common Stock, par value $0.0001 per share (MBX)

Filer Ownership Change % Holdings Value Net Change Nb Shares Change % Reporting Name Report Period
Frazier Life Sciences Public Fund, L.P. 11.7% -13.6% $72.6M $9.26M 5.22M +14.6% Patrick J. Heron Sep 26, 2025
WELLINGTON MANAGEMENT GROUP LLP 10.8% +57.1% $84.4M $44.7M 4.82M +113% Wellington Management Group LLP Sep 30, 2025
ORBIMED ADVISORS LLC 9% $55.6M 4M ORBIMED ADVISORS LLC Sep 26, 2025
New Enterprise Associates 17, L.P. 8.1% $63.3M 3.62M Edward T. Mathers Nov 6, 2025
Deep Track Capital, LP 6.55% $30.4M 2.19M Deep Track Capital, LP Jun 30, 2025
Norwest Venture Partners XVI, LP 4.8% $29.7M 2.14M Tiba Aynechi Sep 26, 2025
Wellington Biomedical Innovation Master Investors (Cayman) II L.P. 4.5% $35.3M 2.02M Wellington Biomedical Innovation Master Investors (Cayman) II, L.P. Sep 30, 2025
Hawryluk P. Kent 4.3% $34.9M 2M P. Kent Hawryluk Sep 30, 2025

Institutional Holders of MBX Biosciences, Inc. - Common Stock, par value $0.0001 per share (MBX)

Period Reported Shares, Excl. Options Value, Excl. Options Change Price Investors
2025 Q3 47.8M $836M +$204M $17.50 115
2025 Q2 36.8M $420M +$15.7M $11.41 87
2025 Q1 35.7M $263M +$14.4M $7.38 79
2024 Q4 32.9M $606M +$46.2M $18.43 63
2024 Q3 30.3M $783M +$783M $25.98 44