Security key
55287L101
- Type / Class
- Equity / COMMON STOCK
- Shares outstanding
- 47,365,871
- Total 13F shares
- 47,790,065
- Share change
- +10,949,133
- Total reported value
- $836,364,494
- Put/Call ratio
- 191%
- Price per share
- $17.50
- Number of holders
- 117
- Value change
- +$203,956,820
- Number of buys
- 67
- Number of sells
- 39
Report period
Q3 2025
Institutions
117
Top holders
10
MBX full security history
Newer quarter: Q4 2025
Previous quarter: Q2 2025
MBX Biosciences, Inc. SEC filings
MBX Biosciences, Inc. company facts
Broader feeds
Reporting periods
Holder history for CUSIP 55287L101
Recent filing periods:
Top shareholders of MBX - MBX Biosciences, Inc. - COMMON STOCK (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Ownership % is shown only when it is directly reported or safely comparable across share classes.
Methodology: rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
| Holder | Source | Role / Reporting | Ownership % | Shares | Holdings Value | 12M Net Δ | As of | Details |
|---|---|---|---|---|---|---|---|---|
| Frazier Life Sciences Public Fund, L.P. |
13D/G
|
Patrick J. Heron |
12%
|
5,224,095
|
$72,562,680 | +$9,264,602 | 26 Sep 2025 | |
| Deep Track Capital, LP |
13D/G
13F
|
Company |
6.6%
|
2,188,592
|
$28,604,897 | $0 | 30 Jun 2025 | |
| Norwest Venture Partners XVI, LP |
13D/G
|
Tiba Aynechi |
4.8%
|
2,140,989
|
$29,738,337 | $0 | 26 Sep 2025 | |
| Wellington Biomedical Innovation Master Investors (Cayman) II L.P. |
13D/G
3/4/5
|
10%+ Owner |
4.5%
|
2,017,394
|
$35,304,395 | $0 | 30 Sep 2025 | |
| P. Kent Hawryluk |
13D/G
|
— |
4.3%
|
1,995,759
|
$34,925,782 | $0 | 30 Sep 2025 | |
| Frazier Life Sciences Management, L.P. |
13F
|
Company |
13%
|
5,985,347
|
$68,292,809 | — | 30 Jun 2025 | |
| ORBIMED ADVISORS LLC |
13F
3/4/5
|
Company · Director, 10%+ Owner |
8.5%
|
4,002,887
|
$45,672,941 | — | 30 Jun 2025 | |
| NEA Management Company, LLC |
13F
|
Company |
7.6%
|
3,614,486
|
$41,241,285 | — | 30 Jun 2025 | |
| WELLINGTON MANAGEMENT GROUP LLP |
13F
|
Company |
4.8%
|
2,266,628
|
$25,862,225 | — | 30 Jun 2025 | |
| NVP Associates, LLC |
13F
|
Company |
4.5%
|
2,136,335
|
$24,375,582 | — | 30 Jun 2025 | |
| DRIEHAUS CAPITAL MANAGEMENT LLC |
13F
|
Company |
3.3%
|
1,571,906
|
$17,935,447 | — | 30 Jun 2025 | |
| PRICE T ROWE ASSOCIATES INC /MD/ |
13F
|
Company |
2.8%
|
1,346,910
|
$15,369,000 | — | 30 Jun 2025 | |
| MPM BioImpact LLC |
13F
|
Company |
2.7%
|
1,294,416
|
$14,769,287 | — | 30 Jun 2025 | |
| EcoR1 Capital, LLC |
13F
|
Company |
2.4%
|
1,149,794
|
$13,119,150 | — | 30 Jun 2025 | |
| VANGUARD GROUP INC |
13F
|
Company |
2.2%
|
1,043,684
|
$11,908,434 | — | 30 Jun 2025 | |
| BlackRock, Inc. |
13F
|
Company |
2.1%
|
1,011,546
|
$11,541,739 | — | 30 Jun 2025 | |
| Point72 Asset Management, L.P. |
13F
|
Company |
2.1%
|
973,787
|
$11,110,910 | — | 30 Jun 2025 | |
| Woodline Partners LP |
13F
|
Company |
1.9%
|
901,103
|
$10,281,585 | — | 30 Jun 2025 | |
| Parkman Healthcare Partners LLC |
13F
|
Company |
1.8%
|
871,933
|
$9,948,756 | — | 30 Jun 2025 | |
| MILLENNIUM MANAGEMENT LLC |
13F
|
Company |
1.6%
|
766,840
|
$8,749,644 | — | 30 Jun 2025 | |
| Cormorant Asset Management, LP |
13F
|
Company |
1.5%
|
700,000
|
$7,987,000 | — | 30 Jun 2025 | |
| TCG Crossover Management, LLC |
13F
|
Company |
1.4%
|
650,000
|
$7,416,500 | — | 30 Jun 2025 | |
| Schonfeld Strategic Advisors LLC |
13F
|
Company |
1.3%
|
631,413
|
$7,204,420 | — | 30 Jun 2025 | |
| FRANKLIN RESOURCES INC |
13F
|
Company |
1%
|
494,852
|
$5,646,261 | — | 30 Jun 2025 | |
| RA CAPITAL MANAGEMENT, L.P. |
13F
|
Company |
0.8%
|
377,841
|
$4,311,166 | — | 30 Jun 2025 | |
| GEODE CAPITAL MANAGEMENT, LLC |
13F
|
Company |
0.74%
|
348,447
|
$3,976,287 | — | 30 Jun 2025 | |
| STATE STREET CORP |
13F
|
Company |
0.56%
|
265,119
|
$3,025,008 | — | 30 Jun 2025 | |
| Sio Capital Management, LLC |
13F
|
Company |
0.51%
|
241,000
|
$2,749,810 | — | 30 Jun 2025 | |
| Opaleye Management Inc. |
13F
|
Company |
0.51%
|
239,319
|
$2,730,630 | — | 30 Jun 2025 | |
| SECTORAL ASSET MANAGEMENT INC |
13F
|
Company |
0.4%
|
191,825
|
$2,188,723 | — | 30 Jun 2025 | |
| TD ASSET MANAGEMENT INC |
13F
|
Company |
0.36%
|
171,304
|
$1,954,579 | — | 30 Jun 2025 | |
| STEMPOINT CAPITAL LP |
13F
|
Company |
0.3%
|
141,021
|
$1,609,050 | — | 30 Jun 2025 | |
| NORTHERN TRUST CORP |
13F
|
Company |
0.24%
|
115,594
|
$1,318,927 | — | 30 Jun 2025 | |
| PLATINUM INVESTMENT MANAGEMENT LTD |
13F
|
Company |
0.24%
|
112,743
|
$1,286,398 | — | 30 Jun 2025 | |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC |
13F
|
Company |
0.23%
|
107,483
|
$1,226,381 | — | 30 Jun 2025 | |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE |
13F
|
Company |
0.18%
|
87,097
|
$993,777 | — | 30 Jun 2025 | |
| Walleye Capital LLC |
13F
|
Company |
0.15%
|
70,333
|
$802,500 | — | 30 Jun 2025 | |
| Exome Asset Management LLC |
13F
|
Company |
0.13%
|
63,076
|
$719,697 | — | 30 Jun 2025 | |
| FMR LLC |
13F
|
Company |
0.13%
|
61,333
|
$699,810 | — | 30 Jun 2025 | |
| BARCLAYS PLC |
13F
|
Company |
0.12%
|
58,541
|
$667,953 | — | 30 Jun 2025 | |
| Aaron Wealth Advisors LLC |
13F
|
Company |
0.11%
|
50,000
|
$570,500 | — | 30 Jun 2025 | |
| Resolute Capital Asset Partners LLC |
13F
|
Company |
0.1%
|
49,670
|
$566,735 | — | 30 Jun 2025 | |
| BANK OF AMERICA CORP /DE/ |
13F
|
Company |
0.09%
|
42,387
|
$483,636 | — | 30 Jun 2025 | |
| Bank of New York Mellon Corp |
13F
|
Company |
0.08%
|
38,032
|
$433,945 | — | 30 Jun 2025 | |
| Rockefeller Capital Management L.P. |
13F
|
Company |
0.07%
|
34,135
|
$389,480 | — | 30 Jun 2025 | |
| Koa Wealth Management, LLC |
13F
|
Company |
0.07%
|
31,752
|
$362,290 | — | 30 Jun 2025 | |
| UBS Group AG |
13F
|
Company |
0.07%
|
30,967
|
$353,333 | — | 30 Jun 2025 | |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC |
13F
|
Company |
0.06%
|
29,200
|
$333,172 | — | 30 Jun 2025 | |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP |
13F
|
Company |
0.06%
|
27,632
|
$315,281 | — | 30 Jun 2025 | |
| MORGAN STANLEY |
13F
|
Company |
0.05%
|
24,008
|
$273,931 | — | 30 Jun 2025 |
Institutional Holders of MBX Biosciences, Inc. - COMMON STOCK (MBX) as of Q3 2025
As of 30 Sep 2025,
MBX Biosciences, Inc. - COMMON STOCK (MBX) was held by
117 institutional
shareholders
that filed Form 13F with the SEC.
Together, they reported ownership of
47,790,065 shares.
The largest 10 holders included
Frazier Life Sciences Management, L.P., WELLINGTON MANAGEMENT GROUP LLP, ORBIMED ADVISORS LLC, NEA Management Company, LLC, Deep Track Capital, LP, NVP ASSOCIATES, LLC, EcoR1 Capital, LLC, Kynam Capital Management, LP, BlackRock, Inc., and VANGUARD GROUP INC.
This page lists
118
institutional shareholders reporting positions in this security
for the Q3 2025 filing period.
| Investor | Option | Weight % | Change % | Value $ | * Price | Shares | Share Change | Activity | Report Period |
|---|
Compare Q3 2025 vs Q2 2025 Across Filers
Q2 2025 holders
87
Q3 2025 holders
117
Holder diff
30
| Investor | Q2 2025 Shares | Q3 2025 Shares | Share Diff | Share Chg % | Q2 2025 Value $ | Q3 2025 Value $ | Value Diff $ | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend
* Reported Price is the price of the security as of the portfolio date. This value is significant in that it is the last known price at which the security was still held.
An asterisk sign (*) next to the price indicates that the price is likely invalid.
An asterisk sign (*) next to the price indicates that the price is likely invalid.