13FPulse
MB

MBX MBX BIOSCIENCES INC

2026Q2 · CUSIP 55287L101 · Sector: Healthcare & Biotech

Cooling

Net holder growth weakened from last quarter

Funds that own it
171
Institutions that reported holding it to the SEC
Net increase in holders
+15
Last quarter 156 → now 171
How unusual is that
Above average
Stronger buying than 78% of US stocks
What the filings say, in one paragraph

171 funds held MBX at the end of 2026Q2, up 15 from the quarter before. Buying has come off its highs, but funds are not exiting. On the business itself, return on equity is -25.5%. MBX has had 3 buying rushes in its history, and the price moved +27.6% on average over the six months after (that is the raw price move, not how much it beat the market by). It sits in the Healthcare & Biotech sector.

How many funds owned it, quarter by quarter

Bars = net change in institutional holders, positive (green) or negative (red). Line = total institutional holders.

2024Q4: holders=63 2025Q1: holders=79 2025Q2: holders=88 2025Q3: holders=118 2025Q4: holders=139 2026Q1: holders=156 2026Q2: holders=171 -30 -15 +0 +15 +30 56118180 24Q425Q125Q225Q325Q426Q126Q2 Net change in holders (bars) Total funds holding (line)

What happened after each past buying rush 3 times in its history

Quarter of the rush How unusual then Price, next 3 months Price, next 6 months
2026Q1 Top 20% +86.6%
2025Q3 Top 20% +19.3% +45.5%
2025Q1 Top 20% +2.6% +9.6%

These are the raw price moves, not how much it beat the market by. Compare them against the market over the same months — in a strong bull market almost everything is up.

Show all the numbers (large funds, value held, options…) ▾
Of them, large funds
91
Change in large funds
+7
Total value they hold
$3.1B
Funds buying for the first time
40
Funds that sold out entirely
25
Price change that quarter
+103.4%
Funds holding puts (bearish)
3
Funds holding calls (bullish)
4

These are for people who want to dig. Skip them if they do not mean anything to you — the three numbers above are enough.

8,697 institutions have filed for this quarter. 13F permits late filing and a small number arrive in the weeks after the deadline, so the holder counts and changes below may tick up.

Fundamentals

PE (TTM)
EPS (TTM)
$-2.37
EPS YoY
-115.0%
Revenue (TTM)
Revenue YoY
Net margin
ROE
-25.5%
Debt ratio
6.0%
FCF (TTM)
-$85M
Dividend (TTM)
No dividend
Quarterly Revenue & EPS
2025-03-31: EPS -0.71 2025-06-30: EPS -0.58 2025-09-30: EPS -0.63 2025-12-31: EPS -0.46 2026-03-31: EPS -0.50 2026-06-30: EPS -0.78 -0.86 -0.43 0.00 2025202606/26 EPS

Quarterly figures, revenue up to 10 years back; EPS split-adjusted, early quarters hidden when not calibrable

Quarterly free cash flow
-23M-11M0K 202420252026
Latest quarter $-21M (2026-03-31)

FCF = operating cash flow − capex, computed from SEC XBRL; banks/insurers have no standard cash-flow structure and are hidden

As of 2026-06-30 · SEC filings (XBRL)

Email me the next update

2026 Q3 holdings are due 2026-11-16. We will email you when the refreshed lists are live.