2 earlier Form 4 trades (code P or S) here by this insider (2 buys), the last on Apr 2, 2025.
-11.3% median (-11.3% mean) 90-day return after 2 previous buys.
The trade is 51.0% of the 41,659,743 shares held after it.
No other insider bought within 30 days.
4 funds added in the 13F quarter to Jun 30, 2026.
Insider activity: Insider Cherington Charles bought about $2.1M of ERNA on Jun 9, 2025, the largest insider purchase at the company on our record; 4 funds added in the latest 13F quarter.
1 earlier Form 4 trade (code P or S) here by this insider (1 buy), the last on Dec 2, 2022.
The trade is 18.5% of the 20,401,602 shares held after it.
No other insider bought within 30 days.
4 funds added in the 13F quarter to Jun 30, 2026.
Insider activity: Insider Cherington Charles bought about $376.8K of ERNA on Apr 2, 2025, the largest insider purchase at the company since 2022; 4 funds added in the latest 13F quarter.
Ratios from the company's XBRL filings, latest filings
Revenue, TTM
$582.0K
four quarters, 2024-01-01 to 2024-12-31
Revenue, TTM ERNA
FY Dec 2025
$582.0K
FY Dec 2024
$582.0K
FY Dec 2023
n/a
FY Dec 2022
n/a
FY Dec 2021
$5.8M
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
$1.0K
Sep 2024
$487.0K
At each fiscal year end
Single quarter
Net margin, TTM
n/a
revenue under $1M, the ratio says nothing
Net margin, TTM ERNA
FY Dec 2025
n/a
FY Dec 2024
n/a
FY Dec 2023
n/a
FY Dec 2022
n/a
FY Dec 2021
-2,113%
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
-5,463%
At each fiscal year end
Single quarter
Free cash flow, TTM
n/a
capex not filed for the four quarters
Free cash flow, TTM ERNA
FY Dec 2025
n/a
FY Dec 2024
-$16.2M
FY Dec 2023
-$20.4M
FY Dec 2022
-$21.3M
FY Dec 2021
-$23.6M
Jun 2026
-$4.2M
Mar 2026
-$2.3M
Dec 2025
-$1.2M
Sep 2025
n/a
Jun 2025
n/a
Mar 2025
n/a
Dec 2024
-$3.5M
Sep 2024
-$6.3M
At each fiscal year end
Single quarter
Debt to equity
0.64x
long-term 2020-12-31 (66 months older than the period end) plus current 2020-12-31 (66 months older than the period end); equity 2026-06-30
Debt to equity ERNA
FY Dec 2025
0.85x
FY Dec 2024
1.19x
FY Dec 2023
0.91x
FY Dec 2022
0.17x
FY Dec 2021
0.08x
Jun 2026
0.64x
Mar 2026
0.30x
Dec 2025
0.85x
Sep 2025
0.57x
Jun 2025
0.46x
Mar 2025
n/a
Dec 2024
1.19x
Sep 2024
n/a
At each fiscal year end
Trailing four quarters at each quarter end
Cash flow to debt
-4.35x
TTM operating cash flow over long-term 2020-12-31 (66 months older than the period end) plus current 2020-12-31 (66 months older than the period end)
Cash flow to debt ERNA
FY Dec 2025
-3.45x
FY Dec 2024
-7.79x
FY Dec 2023
-10.04x
FY Dec 2022
-10.32x
FY Dec 2021
-11.56x
Jun 2026
-4.35x
Mar 2026
-3.55x
Dec 2025
-3.45x
Sep 2025
-4.63x
Jun 2025
-7.10x
Mar 2025
-6.97x
Dec 2024
-7.79x
Sep 2024
-8.34x
At each fiscal year end
Trailing four quarters at each quarter end
Return on equity
-320.7%
TTM net income over average of 2025-06-30 and 2026-06-30
Return on equity ERNA
FY Dec 2025
-686.6%
FY Dec 2024
-2,264%
FY Dec 2023
-302.2%
FY Dec 2022
-130.7%
FY Dec 2021
-739.1%
Jun 2026
-320.7%
Mar 2026
-2,505%
Dec 2025
-686.6%
Sep 2025
n/a
Jun 2025
n/a
Mar 2025
n/a
Dec 2024
-2,264%
Sep 2024
n/a
At each fiscal year end
Trailing four quarters at each quarter end
Return on assets
-176.4%
TTM net income over average of 2025-06-30 and 2026-06-30
Return on assets ERNA
FY Dec 2025
-253.7%
FY Dec 2024
-163.7%
FY Dec 2023
-60.7%
FY Dec 2022
-91.4%
FY Dec 2021
-551.6%
Jun 2026
-176.4%
Mar 2026
-146.0%
Dec 2025
-253.7%
Sep 2025
-264.1%
Jun 2025
-161.7%
Mar 2025
-168.5%
Dec 2024
-163.7%
Sep 2024
-149.9%
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 ERNA
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
-331.4%
operating income (EBIT proxy) over average of 2025-06-30 and 2026-06-30 minus current liabilities
Return on capital employed ERNA
FY Dec 2025
-368.9%
FY Dec 2024
-69.8%
FY Dec 2023
-73.9%
FY Dec 2022
-156.4%
FY Dec 2021
-604.5%
Jun 2026
-331.4%
Mar 2026
-1,427%
Dec 2025
-368.9%
Sep 2025
-1,106%
Jun 2025
-48.7%
Mar 2025
-69.1%
Dec 2024
-69.8%
Sep 2024
-92.8%
At each fiscal year end
Trailing four quarters at each quarter end
P/E, trailing
n/a
trailing loss, a multiple of a loss is not meaningful
P/E, trailing ERNA
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
$883.9K
market value at close 2026-10-26 on 2026-08-06 shares, plus long-term 2020-12-31 (66 months older than the period end) plus current 2020-12-31 (66 months older than the period end), minus cash 2025-06-30
Enterprise value ERNA
FY Dec 2025
$233.2M
FY Dec 2024
$5.6B
FY Dec 2023
$3.6B
FY Dec 2022
$3.5B
FY Dec 2021
$1.6T
Jun 2026
$5.5M
Mar 2026
$143.5M
Dec 2025
$233.2M
Sep 2025
$208.7M
Jun 2025
$2.9B
Mar 2025
$3.5B
Dec 2024
$5.6B
Sep 2024
$2.1B
At each fiscal year end
Trailing four quarters at each quarter end
FCF yield
n/a
capex not filed for the four quarters
FCF yield ERNA
FY Dec 2025
n/a
FY Dec 2024
-0.3%
FY Dec 2023
-0.6%
FY Dec 2022
-0.6%
FY Dec 2021
-0.0%
Jun 2026
n/a
Mar 2026
n/a
Dec 2025
n/a
Sep 2025
-4.6%
Jun 2025
-0.5%
Mar 2025
-0.4%
Dec 2024
-0.3%
Sep 2024
-0.8%
At each fiscal year end
Trailing four quarters at each quarter end
PEG, trailing
n/a
trailing loss, a multiple of a loss is not meaningful
PEG, trailing ERNA
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 2026-10-26. 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.
ERNA ranks highest on growth (95th percentile) and risk and compliance (81st), and lowest on institutional and government (3rd), among Pharma & Biotech peers.
Profitability
10
Inputs
Return on equity-320.7% · 12 pct, sector of 545
Return on assets-176.4% · 13 pct, sector of 691
Return on invested capitalpre-tax loss, no effective tax rate to apply
Return on capital employed-331.4% · 6 pct, sector of 576
Financial health
29
Inputs
Debt to equity0.64x · 26 pct, sector of 352
Cash flow to debt-4.35x · 32 pct, sector of 371
Growth
95
Inputs
Revenue growth, YoY+755.9% · 95 pct, sector of 505
Backlog growth, YoYno backlog line filed, or no year-earlier backlog
Institutional and government
3
Inputs
Funds adding, latest quarter4 · 3 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
81
Inputs
Short interest, % of float+1.6% · 76 pct, sector of 816
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+4.2% · 86 pct, sector of 511
2 not measured: Insider conviction, US patents
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
5 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
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