- Type / Class
- Equity / COMMON STOCK
- Shares outstanding
- 47,365,871
- Total 13F shares
- 32,941,714
- Share change
- +2,632,244
- Total reported value
- $606,485,118
- Price per share
- $18.43
- Number of holders
- 63
- Value change
- +$45,787,522
- Number of buys
- 41
- Number of sells
- 23
Quarterly Holders Quick Answers
What is CUSIP 55287L101?
CUSIP 55287L101 identifies MBX - MBX Biosciences, Inc. - COMMON STOCK in SEC institutional holdings data.
Need full ownership history?
Open the full security ownership history page.
Next holder-history checks
These links keep the next click tied to holder verification, nearby quarters, or outside-13F ownership context.
- Back to full security ownership history for the broader multi-quarter picture.
- Latest 13F filings for newly reported positions across managers.
- Latest Schedule 13D/13G reports for ownership changes outside the 13F cadence.
- SEC investors directory for manager drilldown.
Explore More Reporting Periods
Jump to adjacent filing periods for faster comparison and easier crawl discovery.
Recent filing periods for CUSIP 55287L101:
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 by the holder's primary source 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 Management, L.P. |
13F
|
Company |
13%
|
5,985,347
|
$155,499,315 | — | 30 Sep 2024 | |
| ORBIMED ADVISORS LLC |
13F
|
Company |
8%
|
3,812,215
|
$99,041,346 | — | 30 Sep 2024 | |
| NEA Management Company, LLC |
13F
|
Company |
7.6%
|
3,614,486
|
$93,904,346 | — | 30 Sep 2024 | |
| Deep Track Capital, LP |
13F
|
Company |
6.4%
|
3,018,935
|
$78,431,931 | — | 30 Sep 2024 | |
| WELLINGTON MANAGEMENT GROUP LLP |
13F
|
Company |
6.2%
|
2,937,853
|
$74,261,258 | — | 30 Sep 2024 | |
| NVP Associates, LLC |
13F
|
Company |
4.5%
|
2,136,335
|
$55,501,983 | — | 30 Sep 2024 | |
| Frazier Life Sciences X, L.P. |
3/4/5
|
10%+ Owner |
—
class O/S missing
|
4,552,774
|
$48,669,154 | — | 16 Sep 2024 | |
| RA CAPITAL MANAGEMENT, L.P. |
13F
|
Company |
3.2%
|
1,511,334
|
$39,264,457 | — | 30 Sep 2024 | |
| Ali Behbahani |
3/4/5
|
10%+ Owner |
—
class O/S missing
|
3,614,486
|
$38,638,855 | — | 16 Sep 2024 | |
| Anthony A. Florence Jr. |
3/4/5
|
10%+ Owner |
—
class O/S missing
|
3,614,486
|
$38,638,855 | — | 16 Sep 2024 | |
| Carmen Chang |
3/4/5
|
10%+ Owner |
—
class O/S missing
|
3,614,486
|
$38,638,855 | — | 16 Sep 2024 | |
| Forest Baskett |
3/4/5
|
10%+ Owner |
—
class O/S missing
|
3,614,486
|
$38,638,855 | — | 16 Sep 2024 | |
| Mohamad Makhzoumi |
3/4/5
|
10%+ Owner |
—
class O/S missing
|
3,614,486
|
$38,638,855 | — | 16 Sep 2024 | |
| New Enterprise Associates 17, L.P. |
3/4/5
|
10%+ Owner |
—
class O/S missing
|
3,614,486
|
$38,638,855 | — | 16 Sep 2024 | |
| Paul Edward Walker |
3/4/5
|
10%+ Owner |
—
class O/S missing
|
3,614,486
|
$38,638,855 | — | 16 Sep 2024 | |
| Rick Yang |
3/4/5
|
10%+ Owner |
—
class O/S missing
|
3,614,486
|
$38,638,855 | — | 16 Sep 2024 | |
| Scott D. Sandell |
3/4/5
|
10%+ Owner |
—
class O/S missing
|
3,614,486
|
$38,638,855 | — | 16 Sep 2024 | |
| PRICE T ROWE ASSOCIATES INC /MD/ |
13F
|
Company |
2.5%
|
1,192,938
|
$30,993,000 | — | 30 Sep 2024 | |
| EcoR1 Capital, LLC |
13F
|
Company |
2.5%
|
1,175,809
|
$30,547,518 | — | 30 Sep 2024 | |
| DRIEHAUS CAPITAL MANAGEMENT LLC |
13F
|
Company |
2.1%
|
981,322
|
$25,494,746 | — | 30 Sep 2024 | |
| Wellington Biomedical Innovation Master Investors (Cayman) II L.P. |
3/4/5
|
10%+ Owner |
—
class O/S missing
|
1,790,122
|
$19,136,404 | — | 16 Sep 2024 | |
| Cormorant Asset Management, LP |
13F
|
Company |
1.5%
|
700,000
|
$18,186,000 | — | 30 Sep 2024 | |
| TCG Crossover Management, LLC |
13F
|
Company |
1.4%
|
650,000
|
$16,887,000 | — | 30 Sep 2024 | |
| Woodline Partners LP |
13F
|
Company |
1.1%
|
519,675
|
$13,501,157 | — | 30 Sep 2024 | |
| MILLENNIUM MANAGEMENT LLC |
13F
|
Company |
0.93%
|
440,411
|
$11,441,878 | — | 30 Sep 2024 | |
| FRANKLIN RESOURCES INC |
13F
|
Company |
0.95%
|
450,000
|
$10,597,500 | — | 30 Sep 2024 | |
| Alyeska Investment Group, L.P. |
13F
|
Company |
0.48%
|
225,000
|
$5,845,500 | — | 30 Sep 2024 | |
| PLATINUM INVESTMENT MANAGEMENT LTD |
13F
|
Company |
0.32%
|
150,000
|
$3,897,000 | — | 30 Sep 2024 | |
| CITADEL ADVISORS LLC |
13F
|
Company |
0.29%
|
135,608
|
$3,523,096 | — | 30 Sep 2024 | |
| GOLDMAN SACHS GROUP INC |
13F
|
Company |
0.11%
|
51,000
|
$1,324,980 | — | 30 Sep 2024 | |
| Maven Securities LTD |
13F
|
Company |
0.11%
|
50,000
|
$1,299,000 | — | 30 Sep 2024 | |
| Monashee Investment Management LLC |
13F
|
Company |
0.11%
|
50,000
|
$1,299,000 | — | 30 Sep 2024 | |
| STEMPOINT CAPITAL LP |
13F
|
Company |
0.11%
|
50,000
|
$1,299,000 | — | 30 Sep 2024 | |
| VANGUARD GROUP INC |
13F
|
Company |
0.11%
|
50,000
|
$1,299,000 | — | 30 Sep 2024 | |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE |
13F
|
Company |
0.1%
|
46,194
|
$1,200,120 | — | 30 Sep 2024 | |
| TD ASSET MANAGEMENT INC |
13F
|
Company |
0.09%
|
44,782
|
$1,072,529 | — | 30 Sep 2024 | |
| Ghisallo Capital Management LLC |
13F
|
Company |
0.06%
|
30,000
|
$779,400 | — | 30 Sep 2024 | |
| SOROS FUND MANAGEMENT LLC |
13F
|
Company |
0.06%
|
30,000
|
$779,400 | — | 30 Sep 2024 | |
| TEACHERS RETIREMENT SYSTEM OF THE STATE OF KENTUCKY |
13F
|
Company |
0.06%
|
26,708
|
$694,000 | — | 30 Sep 2024 | |
| JANE STREET GROUP, LLC |
13F
|
Company |
0.06%
|
26,570
|
$690,289 | — | 30 Sep 2024 | |
| NORGES BANK |
13F
|
Company |
0.05%
|
25,000
|
$649,500 | — | 30 Sep 2024 | |
| Point72 (DIFC) Ltd |
13F
|
Company |
0.05%
|
24,011
|
$623,806 | — | 30 Sep 2024 | |
| GEODE CAPITAL MANAGEMENT, LLC |
13F
|
Company |
0.05%
|
22,269
|
$578,548 | — | 30 Sep 2024 | |
| HRT FINANCIAL LP |
13F
|
Company |
0.05%
|
21,637
|
$562,000 | — | 30 Sep 2024 | |
| Squarepoint Ops LLC |
13F
|
Company |
0.03%
|
16,470
|
$427,891 | — | 30 Sep 2024 | |
| BARCLAYS PLC |
13F
|
Company |
0.03%
|
16,400
|
$426,072 | — | 30 Sep 2024 | |
| Point72 Asset Management, L.P. |
13F
|
Company |
0.03%
|
15,600
|
$405,288 | — | 30 Sep 2024 | |
| Shay Capital LLC |
13F
|
Company |
0.03%
|
15,000
|
$389,700 | — | 30 Sep 2024 | |
| DAVIDSON KEMPNER CAPITAL MANAGEMENT LP |
13F
|
Company |
0.03%
|
13,500
|
$337,635 | — | 30 Sep 2024 | |
| MARSHALL WACE, LLP |
13F
|
Company |
0.03%
|
12,000
|
$311,760 | — | 30 Sep 2024 |
Institutional Holders of MBX Biosciences, Inc. - COMMON STOCK (MBX) as of Q4 2024
As of 31 Dec 2024,
MBX Biosciences, Inc. - COMMON STOCK (MBX) was held by
63 institutional
shareholders
that filed Form 13F with the SEC.
Together, they reported ownership of
32,941,714 shares.
The largest 10 holders included
Frazier Life Sciences Management, L.P., ORBIMED ADVISORS LLC, NEA Management Company, LLC, Deep Track Capital, LP, WELLINGTON MANAGEMENT GROUP LLP, NVP Associates, LLC, Driehaus Capital Management LLC, RA CAPITAL MANAGEMENT, L.P., EcoR1 Capital, LLC, and PRICE T ROWE ASSOCIATES INC /MD/.
This page lists
63
institutional shareholders reporting positions in this security
for the Q4 2024 filing period.
| Investor | Option | Weight % | Change % | Value $ | * Price | Shares | Share Change | Activity | Report Period |
|---|
Compare Q4 2024 vs Q3 2024 Across Filers
Q3 2024 holders
45
Q4 2024 holders
63
Holder diff
18
| Investor | Q3 2024 Shares | Q4 2024 Shares | Share Diff | Share Chg % | Q3 2024 Value $ | Q4 2024 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.