AMBR close: $11.0 on 2025-03-13 to $1.1 on 2026-08-28.
Split-adj closes · 240 of 1,133 · price returnⓘ
At a glance
Short interest0.0% of sh out
Days to cover18.3d
13F net flow (QoQ)−0.02%
Top-10 13F concentration99.7%
SI 2026-08-14 · 13F 2026-Q1ⓘ
Key fundamentalsFY 2025
Sales (TTM)$66.1M
Earnings (TTM)$3.8M
ROE−116.1%
Net margin−88.7%
ROIC−207.4%
Sales growth 3Y−52.6%
FY ratios · TTM sales/earnings (USD)ⓘ
Trailing returns
YTD−39.3%
1Y−73.0%
Since incept. (ann.)−80.0%
Total return · from 2025-03-13ⓘ
Risk
Ann. volatility (1Y)107.8%
Ann. volatility (3Y)101.2%
Sharpe (1Y)−0.72
Sharpe (3Y)−1.12
Max drawdown (1Y)−78.7%
Max drawdown (3Y)−92.6%
Beta (3Y vs SPY)0.00
Daily returns, ann.ⓘ
Top institutional holders13F 2026-Q1
Manager
Shares
Value
% sh out
QoQ
Pantera Capital Partners LP
95,694
$225,838
—
+0.0%
SmartHarvest Portfolios, LLC
32,215
$76,027
—
+60.0%
XTX Topco Ltd
27,332
$64,504
—
−33.6%
UBS Group AG
26,786
$63,215
—
+396.2%
CITADEL ADVISORS LLC
19,490
$45,996
—
−61.8%
SUSQUEHANNA INTERNATIONAL GROUP, LLP
11,755
$27,742
—
−57.5%
TWO SIGMA INVESTMENTS, LP
11,502
$27,145
—
+0.0%
BlackRock, Inc.
1,845
$4,354
—
−41.0%
Δ vs 2025-Q4 · % of shares outstanding not shown: this line files 20-F annual reports only — a foreign private issuer whose US listing trades as ADSs (depositary receipts), while its cover-page share count is in ORDINARY shares. The depositary ratio is not in our data. The count we hold for this line is 471,376,257 shares (as of 2025-12-31, source dei). Dividing one by the other is wrong by the whole ratio (a 5:1 ADR reads one fifth of the true percentage), so the percentage is withheld rather than served wrong. Holder share counts are shown as filed.ⓘ
Latest reported quarters
No reported quarters on file for AMBR.
Basis & disclosures
EOD closes · nothing imputed or averaged · absent “—”
As-of differs by block · 13F = US long, 45+d lag, LOWER bound
Not investment advice · no recommendation, price target or solicitation
EDGAR + foreign registers · marketstack (licensed EOD) · spzco.com/methodology
