Security key
55287L101
- Security type / class
- Equity / Common Stock
- Total 13F shares
- 36,839,365
- Total 13F value
- $420,338,016
- Share change
- +1,202,551
- Put/Call ratio
- 105%
- SEC-reported price per share
- $11.41
- Number of holders
- 87
- Value change
- +$15,667,999
- Number of buys
- 60
- Number of sells
- 25
- Shares outstanding
- 47,404,981
Holder snapshot
7 signals
Open additional details 1 more signal available
Security identity
Names, identifiers, and filing context for this profile.
1 source field
Report period
Q2 2025
Institutions
87
Top holders
10
MBX full security history
Ownership snapshot
Full 13F holder table
Newer quarter: Q3 2025
Previous quarter: Q1 2025
MBX Biosciences, Inc. SEC filings
MBX Biosciences, Inc. company facts
Broader feeds
Reporting periods
Holder history for CUSIP 55287L101
Recent filing periods:
Ownership snapshot
Top reported holders of MBX - MBX Biosciences, Inc. - Common Stock (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
Deep Track Capital, LP
Disclosed value leader
Frazier Life Sciences Man...
Comparable rows
15/15
Latest evidence
30 Jun 2025
13D/G
13F
3/4/5
Lead comparable stake: 6.6%
13D/G row: Deep Track Capital, LP
Showing 1-6 of 15 holder rows.
Quick read
Deep Track Capital, LP leads the comparable SEC ownership view at 6.6%.
15 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens Deep Track Capital, LP's linked filing trail.
Comparable ownership
Top 5
Deep Track Capital, LP
6.6%
Frazier Life Sciences Management,...
13%
ORBIMED ADVISORS LLC
8.4%
NEA Management Company, LLC
7.6%
WELLINGTON MANAGEMENT GROUP LLP
5.6%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-6 of 15 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| Deep Track Capital, LP |
13D/G
13F
Company
|
6.6%
|
$28,604,897
2,188,592 shares
|
$0 | 30 Jun 2025 |
| Frazier Life Sciences Management, L.P. |
13F
Company
|
13%
|
$44,171,861
5,985,347 shares
|
— | 31 Mar 2025 |
| ORBIMED ADVISORS LLC |
13F
3/4/5
Company · Director, 10%+ Owner
|
8.4%
|
$29,541,306
4,002,887 shares
|
— | 31 Mar 2025 |
| NEA Management Company, LLC |
13F
Company
|
7.6%
|
$26,674,907
3,614,486 shares
|
— | 31 Mar 2025 |
| WELLINGTON MANAGEMENT GROUP LLP |
13F
Company
|
5.6%
|
$19,472,286
2,638,521 shares
|
— | 31 Mar 2025 |
| NVP Associates, LLC |
13F
Company
|
4.5%
|
$15,766,152
2,136,335 shares
|
— | 31 Mar 2025 |
How to read this table
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.
13F holder rows
Institutional holders as of Q2 2025
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
87
Shares
36,839,365
Rows available
87
| Investor | Option | Weight % | Change % | SEC-reported value | * Price | Shares | Share Change | Activity | Report Period |
|---|
* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.
Compare Q2 2025 vs Q1 2025 Across Filers
Q1 2025 holders
79
Q2 2025 holders
87
Holder diff
8
| Investor | Q1 2025 Shares | Q2 2025 Shares | Share Diff | Share Chg % | Q1 2025 value | Q2 2025 value | Value change | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend