ATRA close: $35.3 on 2023-08-21 to $9.6 on 2026-08-19.
Split-adj closes · 240 of 2,975 · price returnⓘ
At a glance
Short interest5.3% of sh out
Days to cover9.4d
13F net flow (QoQ)+1.14%
Top-10 13F concentration89.4%
Next report (est.)2026-11-12
SI 2026-07-31 · 13F 2026-Q1ⓘ
Key fundamentalsFY 2025
P/E (FY)3.4×
Sales (TTM)$6.2M
Earnings (TTM)-$16.7M
Net margin27.1%
Sales growth 3Y23.9%
FY ratios · TTM sales/earnings (USD)ⓘ
Trailing returns
YTD−46.9%
1Y−16.4%
3Y−72.8%
5Y−96.8%
10Y−98.3%
Since incept. (ann.)−24.5%
Total return · from 2014-10-16ⓘ
Risk
Ann. volatility (1Y)144.2%
Ann. volatility (3Y)135.7%
Sharpe (1Y)0.56
Sharpe (3Y)0.44
Max drawdown (1Y)−76.9%
Max drawdown (3Y)−90.7%
Beta (3Y vs SPY)0.52
Daily returns, ann.ⓘ
Top institutional holders13F 2026-Q1
Manager
Shares
Value
% sh out
QoQ
ADAGE CAPITAL PARTNERS GP, L.L.C.
700,000
$3M
—
new
Redmile Group, LLC
441,701
$2M
—
+0.0%
MACKENZIE FINANCIAL CORP
313,620
$1M
—
+434.6%
VANGUARD CAPITAL MANAGEMENT LLC
217,862
$1M
—
new
Point72 Asset Management, L.P.
194,264
$918,869
—
+961.8%
ACADIAN ASSET MANAGEMENT LLC
130,910
$617,000
—
+142.2%
EcoR1 Capital, LLC
99,593
$471,075
—
−82.6%
BlackRock, Inc.
79,022
$373,773
—
+17.8%
Δ vs 2025-Q4 · % of shares outstanding not shown: no SEC cover-page share count falls within 120 days of the 2026-Q1 quarter end, so any percentage would rest on a count that cannot speak for this quarter. Holder share counts are shown as filed.ⓘ
Latest reported quarterslast report 2026-08-12
Period end
Reported
EPS
EPS YoY
Revenue
Rev YoY
2026-06-30
2026-08-12
−$0.32
−268.4%
$630,000
−96.4%
2026-03-31
2026-05-12
−$0.29
−108.3%
$516,000
−99.5%
2025-12-31
2026-03-16
—
—
$1.6M
−95.1%
2025-09-30
2025-11-12
−$0.32
—
$3.5M
−91.4%
As-reported XBRL · next 2026-11-12 est.ⓘ
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
