QUMS vs ATRA

Comparison between Quantumsphere Acquisition Corp (QUMS, Company) and Atara Biotherapeutics Inc (ATRA, Company).

QUMS is from the Financial Services sector, while ATRA is from the Healthcare sector.

QUMS vs ATRA - Performance Comparison

Log

Key Characteristics

Financial metrics and valuation ratios

Metric	QUMS(COMPANY)	ATRA(COMPANY)
Market Cap	$84M	$84M
Max Drawdown	0.50%	99.74%
Sharpe Ratio	-0.08	0.76
5Y Beta	0.01	1.38
Industry	Shell Companies	Biotechnology
P/E Ratio	N/A	-8.17
Forward P/E	N/A	232.56
PEG Ratio	N/A	0.00
5Y EPS CAGR	N/A	-58.48%
Debt to Equity	0.00%	0.00%
Free Cash Flow Yield	0.00%	-30.83%
P/S Ratio	N/A	3.80
P/B Ratio	N/A	16.14

Market Cap

Winner

QUMS

$84M

ATRA

$84M

Max Drawdown

Winner

QUMS

0.50%

ATRA

99.74%

Sharpe Ratio

QUMS

-0.08

Winner

ATRA

0.76

5Y Beta

Winner

QUMS

0.01

ATRA

1.38

Industry

QUMS

Shell Companies

ATRA

Biotechnology

P/E Ratio

QUMS

N/A

ATRA

-8.17

Forward P/E

QUMS

N/A

ATRA

232.56

PEG Ratio

QUMS

N/A

ATRA

0.00

5Y EPS CAGR

QUMS

N/A

ATRA

-58.48%

Debt to Equity

QUMS

0.00%

ATRA

0.00%

Free Cash Flow Yield

Winner

QUMS

0.00%

ATRA

-30.83%

P/S Ratio

QUMS

N/A

ATRA

3.80

P/B Ratio

QUMS

N/A

ATRA

16.14

QUMS vs ATRA - Historical Returns

Returns include dividend reinvestment.

Period	QUMS	ATRA
1 month	+0.39%	+6.12%
3 months	+1.09%	+50.87%
6 months	+2.10%	-42.15%
1 year	N/A	+19.52%
5 years(CAGR)	N/A	-50.76%
10 years(CAGR)	N/A	-32.07%
Max(CAGR)	+3.61%	-24.28%

QUMS

+0.39%

Winner

ATRA

+6.12%

QUMS

+1.09%

Winner

ATRA

+50.87%

Winner

QUMS

+2.10%

ATRA

-42.15%

QUMS

N/A

ATRA

+19.52%

5Y(CAGR)

QUMS

N/A

ATRA

-50.76%

10Y(CAGR)

QUMS

N/A

ATRA

-32.07%

Max(CAGR)

Winner

QUMS

+3.61%

ATRA

-24.28%

QUMS vs ATRA - Annual Returns (2014 - 2026)

Returns include dividend reinvestment.

Year	QUMS	ATRA
2026	+2.00%	-41.42%
2025	+0.50%	+27.75%
2024	N/A	+10.94%
2023	N/A	-84.37%
2022	N/A	-80.58%
2021	N/A	-19.76%
2020	N/A	+19.62%
2019	N/A	-53.29%
2018	N/A	+91.93%
2017	N/A	+20.07%
2016	N/A	-40.96%
2015	N/A	-1.09%
2014	N/A	+151.17%

QUMS vs ATRA Drawdown Comparison

The maximum drawdown for QUMS was -0.50%, occurring on Jan 23, 2026. Recovery took 3 trading sessions.

The maximum drawdown for ATRA was -99.74%, occurring on Feb 20, 2026. This drawdown has not yet recovered.

The current QUMS drawdown is -0.15%. The current ATRA drawdown is -99.35%.

Rank	QUMS	ATRA
#1	-0.50% Jan 22, 2026 - Jan 27, 2026	-99.74% Apr 23, 2015 - Feb 20, 2026
#2	-0.50% Jan 28, 2026 - Mar 13, 2026	-43.40% Dec 2, 2014 - Mar 12, 2015
#3	-0.30% Sep 30, 2025 - Oct 9, 2025	-21.57% Nov 7, 2014 - Dec 2, 2014
#4	-0.24% Jun 4, 2026 - Jun 10, 2026	-10.42% Mar 23, 2015 - Mar 30, 2015
#5	-0.20% Dec 4, 2025 - Dec 31, 2025	-7.46% Oct 20, 2014 - Oct 24, 2014
#6	-0.20% Jan 5, 2026 - Jan 20, 2026	-7.11% Oct 28, 2014 - Nov 3, 2014
#7	-0.20% Mar 16, 2026 - Apr 2, 2026	-6.34% Mar 30, 2015 - Apr 2, 2015
#8	-0.20% Apr 27, 2026 - May 7, 2026	-5.13% Mar 12, 2015 - Mar 17, 2015
#9	-0.10% Oct 10, 2025 - Nov 17, 2025	-4.65% Mar 17, 2015 - Mar 19, 2015
#10	-0.00% Apr 17, 2026 - Apr 24, 2026	-3.50% Apr 2, 2015 - Apr 8, 2015
#11	N/A	-1.95% Apr 16, 2015 - Apr 20, 2015
#12	N/A	-0.44% Nov 5, 2014 - Nov 7, 2014
#13	N/A	-0.27% Apr 13, 2015 - Apr 16, 2015

Correlation

Correlation between QUMS and ATRA is -0.59 which considered as a moderate negative correlation - the stocks show some tendency to move in opposite directions.

-0.59

-101