MBX — MBX Biosciences Inc. price, chart and key statistics

Price data

Price

$53.50

YTD price return

+69.63%

YTD total return

+69.63%

Next earnings

Nov 5, 2026

Market cap

2.6B2024-09 868.2M2026-10 2.6B+196.8% over the window

Enterprise value

2.2B

Shares outstanding

48.2M2023-12 1.3M2026-06 48.2M+3731.1% over the window

52W low

$13.22

52W high

$72.64

From 52W high

-26.35%

From 52W low

+304.69%

52W range

68%

Volume

Rel volume

1.33×

30D volume

605.5K

30D $ vol

34.3M

Fundamentals

EPS (ttm)

-$2.412023-12 -$31.962026-06 -$2.41-92.5% over the window

FCF (ttm)

-85.2M2023-12 -32.1M2026-06 -85.2M+165.4% over the window

FCF/share

-$1.772023-12 -$25.542026-06 -$1.77-93.1% over the window

Book value/share

$8.502023-12 -$57.652026-06 $8.50-114.8% over the window

ROE

-25.47%2024-12 -24.1%2026-06 -25.5%+5.9% over the window

ROA

-23.93%2023-12 -38.7%2026-06 -23.9%-38.1% over the window

Current ratio

18.082023-12 21.262026-06 18.08-14.9% over the window

Growth (CAGR, ttm) · 10Y

Shares

+43.40%2025-06-30 → 2026-06-3033.6M → 48.2M (+43.4% total)+330.64%2023-12-31 → 2026-06-301.3M → 48.2M (+3731.1% total)n/an/a

Per-share growth (CAGR, ttm) · 10Y

Book value/share

+30.33%2025-06-30 → 2026-06-30$6.53 → $8.50 (+30.3% total)n/an/an/a

Price

+276.31%2025-10-20 → 2026-10-20$14.23 → $53.50 (+276.0% total)Price appreciation from split-adjusted daily closes, excluding dividends; endpoints are exact trading-day anniversaries of the latest close.n/an/an/a

Total return

+276.31%2025-10-20 → 2026-10-20$14.23 → $53.50 (+276.0% total)Total return with dividends reinvested (adjusted daily closes); endpoints are exact trading-day anniversaries of the latest close. The gap against the Price row is the dividend contribution.n/an/an/a

Fundamentals end at the last reported quarter; price and total return end at the latest close.

Valuation

P/E (ttm)Price ÷ TTM diluted EPS. Net income carries everything below the operating line, including one-off gains. Negative when the trailing year lost money.

-22.2×2024-09 -26.662026-10 -24.70-7.4% over the window

Fwd P/E

-12.5×

P/B (mrq)Market cap ÷ stockholders' equity at the most recent quarter end.

6.3×2024-09 3.202026-10 6.29+96.6% over the window

FCF yield (ttm)TTM free cash flow ÷ market cap — the inverse of P/FCF.

-3.31%2024-12 -9.0%2026-06 -3.2%-64.5% over the window

Buyback yield (realized, 1y)1 − shares_at(2026-06-30) ÷ shares_at(2025-06-30) = 1 − 48.2M ÷ 33.6M. Point-in-time share counts from the company's own SEC filings (the same count at both ends), published only when the cash flow statement shows repurchases inside that window. A falling price can't inflate it; negative means net dilution.

-43.40%

Shareholder yield (realized, 1y)Buyback leg + dividend leg: shares retired over the year (-43.40%) + dividends paid over that year ($0) ÷ market_cap_at(2025-06-30) ($383.3M). Both legs are measured against the start of the window, so a payout can't shrink its own denominator.

-43.40%

Buyback yield (cash, ttm)Buybacks net of issuance over the trailing twelve months ($-1.3B) ÷ today's market cap ($2.6B). Dollars SPENT over what the company is worth NOW — a stock that fell after buying reads high.

-50.09%2024-12 0.0%2026-06 -48.5%

Shareholder yield (cash, ttm)(TTM buybacks net of issuance $-1.3B + TTM dividends $0) ÷ today's market cap ($2.6B). Same caveat as the cash buyback yield.

-50.09%2024-12 0.0%2026-06 -48.5%