7 earlier Form 4 trades (code P or S) here by this insider (7 sales), the last on Oct 16, 2025.
The trade is 3.0% of the 1,518,893 shares held after it.
3 other insiders sold within 30 days.
9 funds added in the 13F quarter to Jun 30, 2026.
Insider activity: Insider Decheng Capital China Life Sciences USD Fund II, L.P. sold about $80.1K of BYSI on Oct 17, 2025; 3 other insiders sold within 30 days and 9 funds added in the latest 13F quarter.
6 earlier Form 4 trades (code P or S) here by this insider (6 sales), the last on Aug 28, 2025.
The trade is 5.5% of the 1,564,406 shares held after it.
4 other insiders sold within 30 days.
9 funds added in the 13F quarter to Jun 30, 2026.
Insider activity: Insider Decheng Capital China Life Sciences USD Fund II, L.P. sold about $147.6K of BYSI on Oct 16, 2025; 4 other insiders sold within 30 days and 9 funds added in the latest 13F quarter.
11 earlier Form 4 trades (code P or S) here by this insider (11 sales), the last on Oct 14, 2025.
The trade is 1.1% of the 1,650,204 shares held after it.
4 other insiders sold within 30 days.
9 funds added in the 13F quarter to Jun 30, 2026.
Insider activity: Insider Decheng Capital Global Healthcare GP, LLC sold about $29.6K of BYSI on Oct 15, 2025; 4 other insiders sold within 30 days and 9 funds added in the latest 13F quarter.
10 earlier Form 4 trades (code P or S) here by this insider (10 sales), the last on Oct 13, 2025.
The trade is 1.7% of the 1,668,164 shares held after it.
4 other insiders sold within 30 days.
9 funds added in the 13F quarter to Jun 30, 2026.
Insider activity: Insider Decheng Capital Global Healthcare GP, LLC sold about $47.0K of BYSI on Oct 14, 2025; 4 other insiders sold within 30 days and 9 funds added in the latest 13F quarter.
9 earlier Form 4 trades (code P or S) here by this insider (9 sales), the last on Oct 10, 2025.
The trade is 6.3% of the 1,696,659 shares held after it.
4 other insiders sold within 30 days.
9 funds added in the 13F quarter to Jun 30, 2026.
Insider activity: Insider Decheng Capital Global Healthcare GP, LLC sold about $182.5K of BYSI on Oct 13, 2025; 4 other insiders sold within 30 days and 9 funds added in the latest 13F quarter.
63 transactions on record
Since filing: total return from the first close after the filing to the latest close, dividend-adjusted. Not a forecast.
Context lines are counts over the filings above and returns from our own price history, never a price level. Not investment advice.
Ratios from the company's XBRL filings, latest filings
Revenue, TTM
$0
four quarters, 2025-07-01 to 2026-06-30
Revenue, TTM BYSI
FY Dec 2025
$0
FY Dec 2024
$0
FY Dec 2023
$1.4M
FY Dec 2022
$1.4M
FY Dec 2021
$1.4M
Jun 2026
$0
Mar 2026
$0
Dec 2025
$0
Sep 2025
$0
Jun 2025
$0
Mar 2025
$0
Dec 2024
$0
Sep 2024
$0
At each fiscal year end
Single quarter
Net margin, TTM
n/a
revenue under $1M, the ratio says nothing
Net margin, TTM BYSI
FY Dec 2025
n/a
FY Dec 2024
n/a
FY Dec 2023
-4,750%
FY Dec 2022
-4,750%
FY Dec 2021
-4,750%
Jun 2026
n/a
Mar 2026
n/a
Dec 2025
n/a
Sep 2025
n/a
Jun 2025
n/a
Mar 2025
n/a
Dec 2024
n/a
Sep 2024
n/a
At each fiscal year end
Single quarter
Free cash flow, TTM
-$16.7M
operating cash flow minus capex, 2025-07-01 to 2026-06-30
Free cash flow, TTM BYSI
FY Dec 2025
-$19.8M
FY Dec 2024
-$16.7M
FY Dec 2023
-$50.1M
FY Dec 2022
-$50.1M
FY Dec 2021
-$50.1M
Jun 2026
-$3.8M
Mar 2026
-$3.3M
Dec 2025
-$5.5M
Sep 2025
-$4.2M
Jun 2025
-$5.9M
Mar 2025
-$4.2M
Dec 2024
$955.0K
Sep 2024
-$5.4M
At each fiscal year end
Single quarter
Debt to equity
n/a
equity is zero or negative, the ratio has no meaning
Debt to equity BYSI
FY Dec 2025
n/a
FY Dec 2024
n/a
FY Dec 2023
0.06x
FY Dec 2022
0.06x
FY Dec 2021
0.06x
Jun 2026
n/a
Mar 2026
n/a
Dec 2025
n/a
Sep 2025
n/a
Jun 2025
n/a
Mar 2025
n/a
Dec 2024
n/a
Sep 2024
n/a
At each fiscal year end
Trailing four quarters at each quarter end
Cash flow to debt
n/a
no debt to cover
Cash flow to debt BYSI
FY Dec 2025
n/a
FY Dec 2024
n/a
FY Dec 2023
-30.11x
FY Dec 2022
-30.11x
FY Dec 2021
-30.11x
Jun 2026
n/a
Mar 2026
n/a
Dec 2025
n/a
Sep 2025
n/a
Jun 2025
n/a
Mar 2025
n/a
Dec 2024
n/a
Sep 2024
n/a
At each fiscal year end
Trailing four quarters at each quarter end
Return on equity
n/a
average equity is zero or negative
Return on equity BYSI
FY Dec 2025
n/a
FY Dec 2024
n/a
FY Dec 2023
-111.6%
FY Dec 2022
-111.6%
FY Dec 2021
-111.6%
Jun 2026
n/a
Mar 2026
n/a
Dec 2025
n/a
Sep 2025
n/a
Jun 2025
n/a
Mar 2025
n/a
Dec 2024
n/a
Sep 2024
n/a
At each fiscal year end
Trailing four quarters at each quarter end
Return on assets
-29.3%
TTM net income over average of 2025-06-30 and 2026-06-30
Return on assets BYSI
FY Dec 2025
-3.3%
FY Dec 2024
-37.6%
FY Dec 2023
-64.6%
FY Dec 2022
-64.6%
FY Dec 2021
-64.6%
Jun 2026
-29.3%
Mar 2026
-27.5%
Dec 2025
-3.3%
Sep 2025
-2.0%
Jun 2025
-4.6%
Mar 2025
-9.2%
Dec 2024
-37.6%
Sep 2024
n/a
At each fiscal year end
Trailing four quarters at each quarter end
Return on invested capital
n/a
pre-tax loss, no effective tax rate to apply
Return on invested capital BYSI
FY Dec 2025
n/a
FY Dec 2024
n/a
FY Dec 2023
n/a
FY Dec 2022
n/a
FY Dec 2021
n/a
Jun 2026
n/a
Mar 2026
n/a
Dec 2025
n/a
Sep 2025
n/a
Jun 2025
n/a
Mar 2025
n/a
Dec 2024
n/a
Sep 2024
n/a
At each fiscal year end
Trailing four quarters at each quarter end
Return on capital employed
-84.6%
operating income (EBIT proxy) over average of 2025-06-30 and 2026-06-30 minus current liabilities
Return on capital employed BYSI
FY Dec 2025
-50.2%
FY Dec 2024
-43.6%
FY Dec 2023
-78.0%
FY Dec 2022
-78.0%
FY Dec 2021
-78.0%
Jun 2026
-84.6%
Mar 2026
-56.2%
Dec 2025
-50.2%
Sep 2025
-48.5%
Jun 2025
-53.8%
Mar 2025
-38.1%
Dec 2024
-43.6%
Sep 2024
n/a
At each fiscal year end
Trailing four quarters at each quarter end
P/E, trailing
n/a
fewer than four consecutive quarters of diluted EPS
P/E, trailing BYSI
FY Dec 2025
n/a
FY Dec 2024
n/a
FY Dec 2023
n/a
FY Dec 2022
n/a
FY Dec 2021
n/a
Jun 2026
n/a
Mar 2026
n/a
Dec 2025
n/a
Sep 2025
n/a
Jun 2025
n/a
Mar 2025
n/a
Dec 2024
n/a
Sep 2024
n/a
At each fiscal year end
Trailing four quarters at each quarter end
Enterprise value
$16.3M
market value at close 2026-10-27 on 2026-07-31 shares, plus long-term 2021-12-31 (54 months older than the period end) plus current 2022-12-31 (42 months older than the period end), minus cash 2026-06-30
Enterprise value BYSI
FY Dec 2025
$58.0M
FY Dec 2024
$60.6M
FY Dec 2023
$31.3M
FY Dec 2022
$40.5M
FY Dec 2021
$136.3M
Jun 2026
$69.3M
Mar 2026
$63.4M
Dec 2025
$58.0M
Sep 2025
$60.5M
Jun 2025
$85.2M
Mar 2025
$51.3M
Dec 2024
$60.6M
Sep 2024
$80.9M
At each fiscal year end
Trailing four quarters at each quarter end
FCF yield
-88.1%
TTM free cash flow over market value at close 2026-10-27
FCF yield BYSI
FY Dec 2025
-30.1%
FY Dec 2024
-26.2%
FY Dec 2023
-142.7%
FY Dec 2022
-68.3%
FY Dec 2021
-28.4%
Jun 2026
-23.3%
Mar 2026
-27.9%
Dec 2025
-30.1%
Sep 2025
-18.3%
Jun 2025
-15.3%
Mar 2025
-27.0%
Dec 2024
-26.2%
Sep 2024
n/a
At each fiscal year end
Trailing four quarters at each quarter end
PEG, trailing
n/a
fewer than four consecutive quarters of diluted EPS
PEG, trailing BYSI
FY Dec 2025
n/a
FY Dec 2024
n/a
FY Dec 2023
n/a
FY Dec 2022
n/a
FY Dec 2021
n/a
Jun 2026
n/a
Mar 2026
n/a
Dec 2025
n/a
Sep 2025
n/a
Jun 2025
n/a
Mar 2025
n/a
Dec 2024
n/a
Sep 2024
n/a
At each fiscal year end
Trailing four quarters at each quarter end
Price as of 2026-10-27. Hover or tap a tile for its yearly and quarterly history.Method
TTM is four consecutive fiscal quarters; Q4 is the year minus nine months when not filed. Returns use the average of opening and closing balances. EBIT is approximated by operating income. PEG uses trailing EPS growth.
Fundamentals
Annual figures from XBRL filings. Pick a past date to see them as known then.
BYSI ranks highest on risk and compliance (70th percentile) and profitability (46th), and lowest on institutional and government (14th), among Pharma & Biotech peers.
Profitability
46
Inputs
Return on equityaverage equity is zero or negative
Return on assets-29.3% · 61 pct, sector of 691
Return on invested capitalpre-tax loss, no effective tax rate to apply
Return on capital employed-84.6% · 31 pct, sector of 576
Institutional and government
14
Inputs
Funds adding, latest quarter9 · 14 pct, sector of 698
Congress net buyers, 365dno Congress trades in 365 days
Federal contracts, 180dno federal contracts in 180 days
Lobbying spend, 4 quartersno lobbying filings in the last four quarters
Risk and compliance
70
Inputs
Short interest, % of float+7.7% · 47 pct, sector of 813
Recalls per $1B revenue, 3yrevenue under $50M or not filed, so a count cannot be scaled to size
EPA cases per $1B revenue, 5yrevenue under $50M or not filed, so a count cannot be scaled to size
New text in Risk Factors, latest 10-K+2.4% · 94 pct, sector of 511
4 not measured: Financial health, Growth, Insider conviction, US patents
Financial health needs 1 of 2 inputs, 0 present: equity is zero or negative, the ratio has no meaning; no debt to cover
Growth needs 1 of 2 inputs, 0 present: no backlog line filed, or no year-earlier backlog; no revenue for this year and the year before
Insider conviction needs 1 of 2 inputs, 0 present: no Form 4 purchase or sale (code P or S) in 180 days; no insider trades in 180 days
US patents needs 1 of 2 inputs, 0 present: patent data not loaded yet
3 of 7 axes scored. Each is a percentile against sector peers (all companies when the sector is thin); higher is better. An unscored axis is unmeasured, not low. How it is scored
Explore insider trading and ownership data
Every company we track, ranked by each kind of filing
No password to create and no card required. We store your email address, your watchlist and your preferences, nothing else.
PRIVACY & COOKIES
We track filings, not you.
Essential cookies keep you signed in and remember this choice.
Google Analytics 4 and Microsoft Clarity load only if you allow them here; they
count visits and record how pages are used. We run no advertising and never sell
data. Details in the privacy policy. Change this any time
via "Cookie settings" in the footer.