ATRA vs. AUTL

Last updated Jun 3, 2026

ATRA (Atara Biotherapeutics, Inc.) and AUTL (Autolus Therapeutics plc) are both stocks. Both operate in the Biotechnology industry within the Healthcare sector. Over the past 5 years, ATRA returned -50.50%/yr vs -22.50%/yr for AUTL. At a 0.26 correlation, their price movements are largely independent.

Performance

ATRA vs. AUTL - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Atara Biotherapeutics, Inc. (ATRA) and Autolus Therapeutics plc (AUTL). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, ATRA achieves a -45.27% return, which is significantly lower than AUTL's -12.06% return.

ATRA

• 1D: -3.70%
• 1M: 102.04%
• YTD: -45.27%
• 6M: -18.99%
• 1Y: 23.75%
• 3Y*: -36.41%
• 5Y*: -50.50%
• 10Y*: -31.79%

AUTL

• 1D: -4.89%
• 1M: 19.05%
• YTD: -12.06%
• 6M: 30.60%
• 1Y: -8.38%
• 3Y*: -15.50%
• 5Y*: -22.50%
• 10Y*: —

*Multi-year figures are annualized to reflect compound growth (CAGR)

ATRA vs. AUTL - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018
ATRA Atara Biotherapeutics, Inc.	-45.27%	35.91%	3.82%	-84.37%	-79.19%	-19.71%	19.19%	-52.59%	-17.78%
AUTL Autolus Therapeutics plc	-12.06%	-15.32%	-63.51%	238.95%	-63.39%	-41.95%	-32.27%	-59.81%	31.36%

Correlation

The correlation between ATRA and AUTL is 0.30, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.30
Correlation (3Y) Calculated over the trailing 3-year period	0.28
Correlation (5Y) Calculated over the trailing 5-year period	0.28
Correlation (All Time) Calculated using the full available price history since Jun 25, 2018	0.26

Fundamentals

Market Cap ATRA : $139.40M AUTL : $465.75M
EPS ATRA : -$0.72 AUTL : -$1.09
PS Ratio ATRA : 5.76 AUTL : 5.03
Total Revenue (TTM) ATRA : $22.62M AUTL : $92.59M
Gross Profit (TTM) ATRA : $21.73M AUTL : -$10.36M
EBITDA (TTM) ATRA : -$6.92M AUTL : -$253.48M

Return for Risk

ATRA vs. AUTL — Risk / Return Rank

Compare risk-adjusted metric ranks to identify better-performing investments over the past 12 months.

ATRA

ATRA Risk / Return Rank: 55
ATRA Sharpe Ratio Rank: 46
ATRA Sortino Ratio Rank: 62
ATRA Omega Ratio Rank: 69
ATRA Calmar Ratio Rank: 49
ATRA Martin Ratio Rank: 47

AUTL

AUTL Risk / Return Rank: 38
AUTL Sharpe Ratio Rank: 35
AUTL Sortino Ratio Rank: 39
AUTL Omega Ratio Rank: 37
AUTL Calmar Ratio Rank: 39
AUTL Martin Ratio Rank: 39

The rank (0–100) shows how this investment's returns compare to the risk taken. Higher = better. Based on the past 12 months of data, combining Sharpe, Sortino, and other metrics used by quantitative funds and institutional investors.

ATRA vs. AUTL - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Atara Biotherapeutics, Inc. (ATRA) and Autolus Therapeutics plc (AUTL). Risk-adjusted metrics are performance indicators that assess an investment's returns in relation to its risk, enabling a more accurate comparison of different investment options.

	ATRA	AUTL	Difference
Sharpe ratio Return per unit of total volatility	0.17	-0.11	+0.28
Sortino ratio Return per unit of downside risk	1.42	0.39	+1.04
Omega ratio Gain probability vs. loss probability	1.23	1.04	+0.18
Calmar ratio Return relative to maximum drawdown	0.35	-0.00	+0.35
Martin ratio Return relative to average drawdown	0.62	-0.00	+0.62
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

ATRA vs. AUTL - Sharpe Ratio Comparison

The current ATRA Sharpe Ratio is 0.17, which is higher than the AUTL Sharpe Ratio of -0.11. The chart below compares the historical Sharpe Ratios of ATRA and AUTL, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Sharpe Ratios by Period

	ATRA	AUTL	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	0.17	-0.11	+0.28
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	-0.42	-0.29	-0.12
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	-0.32	—	—
Sharpe Ratio (All Time) Calculated using the full available price history	-0.25	-0.35	+0.11

Drawdowns

ATRA vs. AUTL - Drawdown Comparison

The maximum ATRA drawdown since its inception was -99.74%, roughly equal to the maximum AUTL drawdown of -97.63%. Use the drawdown chart below to compare losses from any high point for ATRA and AUTL.

Drawdown Indicators

	ATRA	AUTL	Difference
Max Drawdown Largest peak-to-trough decline	-99.74%	-97.63%	-2.11%
Max Drawdown (1Y) Largest decline over 1 year	-76.89%	-54.85%	-22.04%
Max Drawdown (3Y) Largest decline over 3 years	-92.76%	-84.36%	-8.40%
Max Drawdown (5Y) Largest decline over 5 years	-99.16%	-85.68%	-13.48%
Max Drawdown (10Y) Largest decline over 10 years	-99.68%	—	—
Current Drawdown Current decline from peak	-99.38%	-96.35%	-3.03%
Average Drawdown Average peak-to-trough decline	-73.99%	-81.24%	+7.25%
Ulcer Index Depth and duration of drawdowns from previous peaks	43.41%	38.67%	+4.74%

Volatility

ATRA vs. AUTL - Volatility Comparison

Atara Biotherapeutics, Inc. (ATRA) has a higher volatility of 72.26% compared to Autolus Therapeutics plc (AUTL) at 22.87%. This indicates that ATRA's price experiences larger fluctuations and is considered to be riskier than AUTL based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	ATRA	AUTL	Difference
Volatility (1M) Calculated over the trailing 1-month period	72.26%	22.87%	+49.39%
Volatility (6M) Calculated over the trailing 6-month period	133.02%	51.98%	+81.04%
Volatility (1Y) Calculated over the trailing 1-year period	143.93%	75.89%	+68.04%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	122.01%	77.66%	+44.35%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	100.24%	80.82%	+19.42%

Dividends

ATRA vs. AUTL - Dividend Comparison

Neither ATRA nor AUTL has paid dividends to shareholders.

Tickers have no history of dividend payments

Financials

Frequently Asked Questions

Can I hold both ATRA and AUTL in my portfolio?

ATRA and AUTL have a correlation of 0.30, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, ATRA or AUTL?

ATRA has higher volatility (72.26%) compared to AUTL (22.87%). In terms of maximum drawdown, ATRA dropped -99.74% vs AUTL's -97.63%.

Which has better risk-adjusted returns?

ATRA currently has the higher Sharpe Ratio (0.17 vs -0.11), meaning it's delivered slightly more return per unit of risk over the trailing 12 months. However, this ranking shifts over time - use the Risk/Return Score above for a more comprehensive view that combines Sharpe, Sortino, and other measures used by quantitative funds.