MBX BIOSCIENCES INC

$MBX
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Smart money positioned

8 of the Top-200 alpha managers hold $MBX as of the latest 13F snapshot.

13F holders
151
Insider buys · 90d
1code P
Congress · 90d
0

Smart Money · top-200 alpha cohort

8 holders · Q1 2026

$MBX is held by 8 managers from the Top-Performer cohort as of Q1 2026. Position weights range from 0.00% to 2.85%, with an average of 0.55% of portfolio. Largest holder: Fidelis Capital Partners, LLC at 2.85%. A weekly Smart-Money commentary for this ticker has not been generated yet this batch — the table below shows the full cohort positioning.

01
Fidelis Capital Partners, LLC
2.85% NEW
α +19.5pts
02
Eventide Asset Management, LLC
0.44% NEW
α +22.5pts
03
Platinum Investment Management Ltd.
0.33% NEW
α +25.6pts
04
Soleus Capital Management, L.P.
0.22% held
α +16.0pts
05
Wellington Management Group LLP
0.02% held
α +10.5pts

Smart Money shows holdings from our Top-Performer cohort — the 200 highest-alpha manager_13f funds in our universe. Position weight (current quarter) and QoQ delta versus prior quarter. α is the manager's annual alpha vs benchmark.

Institutional holders

Top 10 of 151 · Source: 13F-HR
01
Heritage Investment Group, Inc.
5.12% of portfolio
6,652,013 sh
02
Sculptor Capital LP
2.16% of portfolio
3,637,887 sh
03
Gotham Asset Management, LLC
6.13% of portfolio
3,614,486 sh
04
RWQ Financial Management Services, Inc.
1.34% of portfolio
2,757,569 sh
05
New England Professional Planning Group Inc.
36.20% of portfolio
2,136,335 sh
06
EcoR1 Capital, LLC
1.80% of portfolio
2,123,604 sh
07
Fernbridge Capital Management LP
0.17% of portfolio
1,622,186 sh
08
Meixler Investment Management, Ltd.
1.49% of portfolio
1,492,467 sh
09
Vida Ventures Advisors, LLC
0.56% of portfolio
1,300,000 sh
10
Jackson Square Capital, LLC
1.98% of portfolio
1,168,176 sh
See all 151 13F holders · Pro →

Insider activity · last 90 days

2 transactions · 2 filers
13 Mar 2026
Hawryluk P. Kent —
▲ BOUGHT
18,500
$28.41
P
26 Sep 2025
Heron Patrick J —
▲ BOUGHT
666,666
$18.00
P

Transaction codes: P open-market purchase · S sale · M option exercise · A grant · F tax-withhold sale. Insider names link to each individual's expert page.

Congress trades · last 90 days

No Congress trades

No STOCK Act filings reference $MBX in the recent window.

Source data: SEC EDGAR · 13F-HR · Form 4 · U.S. House Clerk PTR (disclosures-clerk.house.gov) · Senate eFD (senate.gov) · Last refreshed 07:17 UTC.