What is the current annual EBITDA of NKTR?

As of today, NKTR annual EBITDA is -$133.45M

What is 1-year change in NKTR annual EBITDA?

NKTR annual EBITDA is down -3.67% year-over-year

What is 3-year change in NKTR annual EBITDA?

NKTR annual EBITDA is up +41.48% over the past 3 years

How far is NKTR annual EBITDA from its all-time high?

NKTR annual EBITDA is currently -119.15% below its historical high of $696.73M set on December 31, 2018

How does NKTR annual EBITDA rank versus sector peers?

NKTR annual EBITDA is higher than 12.95% of companies in Healthcare sector

When is NKTR next annual earnings release?

As of today, the next annual earnings release for NKTR has not been scheduled

What is the current quarterly EBITDA of NKTR?

As of today, NKTR quarterly EBITDA is -$41.61M

What is NKTR quarterly EBITDA most recent change?

NKTR quarterly EBITDA was down -9.18% on June 30, 2026

What is 1-year change in NKTR quarterly EBITDA?

NKTR quarterly EBITDA is down -16.98% year-over-year

How far is NKTR quarterly EBITDA from its all-time high?

NKTR quarterly EBITDA is currently -104.26% below its historical high of $976.17M set on June 30, 2018

How does NKTR quarterly EBITDA rank versus sector peers?

NKTR quarterly EBITDA is higher than 12.30% of companies in Healthcare sector

When is NKTR next earnings release?

The next earnings release for NKTR is on November 12, 2026

What is the current TTM EBITDA of NKTR?

As of today, NKTR TTM EBITDA is -$129.95M

What is NKTR TTM EBITDA most recent change?

NKTR TTM EBITDA was down -4.87% on June 30, 2026

What is 1-year change in NKTR TTM EBITDA?

NKTR TTM EBITDA is up +5.26% year-over-year

How far is NKTR TTM EBITDA from its all-time high?

NKTR TTM EBITDA is currently -113.54% below its historical high of $959.86M set on June 30, 2018

How does NKTR TTM EBITDA rank versus sector peers?

NKTR TTM EBITDA is higher than 13.72% of companies in Healthcare sector

When is NKTR next earnings release?

The next earnings release for NKTR is on November 12, 2026

NKTR EBITDA History & Chart Since 1994

Annual EBITDA

-$133.45M$4.72M-3.67%

December 31, 2025

Summary

Current Value: As of today, NKTR annual EBITDA is -$133.45M, down -3.67% on December 31, 2025
Historical Performance: NKTR annual EBITDA is up +41.48% over the past 3 years, up +63.68% over the past 5 years
All-Time High Comparison: NKTR annual EBITDA is currently -119.15% below its historical high of $696.73M set on December 31, 2018
3-Year Low Comparison: NKTR annual EBITDA is +41.48% above its 3-year low of -$228.04M reached on an earlier date
Sector Comparison: NKTR annual EBITDA is higher than 12.95% of companies in Healthcare sector

EBITDA Chart

beforeafter

Performance

NKTR Performance
Metric	Date	Value	1Y	3Y	5Y	15Y
	Dec 31, 25	-$133.45M	-3.7%	+41.5%	+63.7%	-10000.0%
	Jun 30, 26	-$41.61M	-17.0%	-30.5%	+61.0%	-36.5%
	Jun 30, 26	-$129.95M	+5.3%	+7.1%	+69.0%	-95.5%
Price	Sep 4, 26	$74.19	+106.2%	+724.3%	-68.8%	-6.8%
	Sep 4, 26	-	–	–	–	–
	Dec 31, 25	$55.23M	-43.9%	-40.0%	-63.9%	-65.3%
	Dec 31, 25	-$9.73	-12.1%	-394.3%	-290.8%	-2331.3%
	Dec 31, 25	-$130.77M	+1.8%	+45.6%	+65.6%	-734.0%
	Dec 31, 25	-$164.08M	-37.9%	+55.4%	+63.1%	-332.5%

EBITDA Highs

NKTR Annual EBITDA Highs Comparison
Period	High	Date	Current
3Y	-$128.73M	Dec 31, 24	-3.7%
5Y	-$128.73M	Dec 31, 24	-3.7%
All	$696.73M	Dec 31, 18	-119.2%

EBITDA Lows

NKTR Annual EBITDA Lows Comparison
Period	Low	Date	Current
3Y	-$228.04M	N/A	+41.5%
5Y	-$433.10M	Dec 31, 21	+69.2%
All	-$433.10M	Dec 31, 21	+69.2%

EBITDA History

Year	Value	Change
2025	-$133.45M	-3.7%
2024	-$128.73M	+0.7%
2023	-$129.61M	+43.2%
2022	-$228.04M	+47.3%
2021	-$433.10M	-17.9%
2020	-$367.42M	+14.4%
2019	-$429.04M	-161.6%
2018	$696.73M	+2,743.0%
2017	-$26.36M	+73.5%
2016	-$99.66M	-565.7%
2015	-$14.97M	-212.9%
2014	-$4.79M	+95.0%
2013	-$95.83M	+23.8%
2012	-$125.73M	-18.3%
2011	-$106.24M	>-9,900.0%
2010	$872.00K	+101.1%

Year	Value	Change
2009	-$80.25M	+34.9%
2008	-$123.30M	-157.2%
2007	-$47.94M	+51.4%
2006	-$98.60M	-15.5%
2005	-$85.34M	-52.6%
2004	-$55.93M	-16.6%
2003	-$47.97M	+39.3%
2002	-$79.06M	-9.0%
2001	-$72.57M	-32.9%
2000	-$54.59M	-130.3%
1999	-$23.71M	-27.6%
1998	-$18.58M	-63.1%
1997	-$11.39M	-9.3%
1996	-$10.42M	-32.3%
1995	-$7.87M	-51.1%
1994	-$5.21M	-

FAQ

What is the current annual EBITDA of NKTR?: As of today, NKTR annual EBITDA is -$133.45M
What is 1-year change in NKTR annual EBITDA?: NKTR annual EBITDA is down -3.67% year-over-year
What is 3-year change in NKTR annual EBITDA?: NKTR annual EBITDA is up +41.48% over the past 3 years
How far is NKTR annual EBITDA from its all-time high?: NKTR annual EBITDA is currently -119.15% below its historical high of $696.73M set on December 31, 2018
How does NKTR annual EBITDA rank versus sector peers?: NKTR annual EBITDA is higher than 12.95% of companies in Healthcare sector
When is NKTR next annual earnings release?: As of today, the next annual earnings release for NKTR has not been scheduled

EBITDA Formula

EBITDA = + + +

Quarterly EBITDA

-$41.61M$3.50M-9.18%

June 30, 2026

Summary

Current Value: As of today, NKTR quarterly EBITDA is -$41.61M, down -9.18% on June 30, 2026
Historical Performance: NKTR quarterly EBITDA is down -16.98% year-over-year, down -30.52% over the past 3 years
All-Time High Comparison: NKTR quarterly EBITDA is currently -104.26% below its historical high of $976.17M set on June 30, 2018
3-Year Low Comparison: NKTR quarterly EBITDA is +5.31% above its 3-year low of -$43.94M reached on March 31, 2025
Sector Comparison: NKTR quarterly EBITDA is higher than 12.30% of companies in Healthcare sector

Performance

NKTR Performance
Metric	Date	Value	3M	1Y	3Y	5Y
	Jun 30, 26	-$41.61M	-9.2%	-17.0%	-30.5%	+61.0%
	Dec 31, 25	-$133.45M	–	-3.7%	+41.5%	+63.7%
	Jun 30, 26	-$129.95M	-4.9%	+5.3%	+7.1%	+69.0%
Price	Sep 4, 26	$74.19	+25.1%	+106.2%	+724.3%	-68.8%
	Sep 4, 26	-	–	–	–	–
	Jun 30, 26	$10.13M	-6.7%	-9.3%	-50.6%	-64.2%
	Jun 30, 26	-$1.23	+32.3%	+58.4%	-355.8%	-78.9%
	Jun 30, 26	-$41.76M	-9.2%	-16.7%	-22.7%	+62.1%
	Jun 30, 26	-$40.62M	+9.5%	+2.3%	+20.5%	+67.6%

Quarterly EBITDA Highs

NKTR Quarterly EBITDA Highs Comparison
Period	High	Date	Current
1Y	-$18.90M	Dec 31, 25	-120.1%
3Y	-$18.90M	Dec 31, 25	-120.1%
5Y	-$18.90M	Dec 31, 25	-120.1%
All	$976.17M	Jun 30, 18	-104.3%

Quarterly EBITDA Lows

NKTR Quarterly EBITDA Lows Comparison
Period	Low	Date	Current
1Y	-$41.61M	Jun 30, 26	at low
3Y	-$43.94M	Mar 31, 25	+5.3%
5Y	-$111.36M	Mar 31, 22	+62.6%
All	-$117.61M	Mar 31, 19	+64.6%

Quarterly EBITDA History

Month	Value	Change
Jun 2026	-$41.61M	-9.2%
Mar 2026	-$38.11M	-101.6%
Dec 2025	-$18.90M	+39.7%
Sep 2025	-$31.34M	+11.9%
Jun 2025	-$35.57M	+19.1%
Mar 2025	-$43.94M	-80.5%
Dec 2024	-$24.35M	+26.9%
Sep 2024	-$33.31M	+4.9%
Jun 2024	-$35.03M	-6.6%
Mar 2024	-$32.85M	-13.2%
Dec 2023	-$29.01M	+8.8%
Sep 2023	-$31.81M	+0.2%
Jun 2023	-$31.88M	+8.2%
Mar 2023	-$34.71M	+9.9%
Dec 2022	-$38.54M	-10.8%
Sep 2022	-$34.79M	+19.7%
Jun 2022	-$43.35M	+61.1%
Mar 2022	-$111.36M	-0.7%
Dec 2021	-$110.62M	-0.6%
Sep 2021	-$109.98M	-3.1%
Jun 2021	-$106.66M	-0.8%
Mar 2021	-$105.85M	+1.5%
Dec 2020	-$107.48M	-7.7%
Sep 2020	-$99.81M	-33.9%
Jun 2020	-$74.52M	+11.2%
Mar 2020	-$83.94M	+22.4%
Dec 2019	-$108.22M	-13.6%
Sep 2019	-$95.29M	+11.7%
Jun 2019	-$107.92M	+8.2%
Mar 2019	-$117.61M	-21.0%
Dec 2018	-$97.22M	-1.3%
Sep 2018	-$95.95M	-109.8%
Jun 2018	$976.17M	+1,259.4%
Mar 2018	-$84.20M	-1,461.2%
Dec 2017	-$5.39M	-107.4%
Sep 2017	$73.28M	+275.7%
Jun 2017	-$41.70M	+17.3%
Mar 2017	-$50.40M	-78.1%
Dec 2016	-$28.30M	+2.5%
Sep 2016	-$29.03M	+15.6%
Jun 2016	-$34.41M	-496.4%
Mar 2016	-$5.77M	+74.5%
Dec 2015	-$22.62M	-712.1%
Sep 2015	$3.70M	+109.1%
Jun 2015	-$40.61M	-188.2%
Mar 2015	$46.02M	+234.2%
Dec 2014	-$34.29M	-141.1%
Sep 2014	$83.54M	+524.9%
Jun 2014	-$19.66M	+40.7%
Mar 2014	-$33.14M	-56.3%
Dec 2013	-$21.20M	-625.1%
Sep 2013	-$2.92M	+89.9%
Jun 2013	-$28.95M	+30.7%
Mar 2013	-$41.78M	-5.8%
Dec 2012	-$39.47M	-34.9%
Sep 2012	-$29.26M	-24.4%
Jun 2012	-$23.52M	+28.3%
Mar 2012	-$32.78M	-6.1%
Dec 2011	-$30.89M	-75.9%
Sep 2011	-$17.56M	+42.4%
Jun 2011	-$30.47M	-1.5%

Month	Value	Change
Mar 2011	-$30.01M	-667.3%
Dec 2010	-$3.91M	-89.9%
Sep 2010	-$2.06M	-134.0%
Jun 2010	$6.05M	+665.1%
Mar 2010	$791.00K	+146.8%
Dec 2009	-$1.69M	+93.3%
Sep 2009	-$25.14M	+6.0%
Jun 2009	-$26.74M	-0.2%
Mar 2009	-$26.68M	+28.0%
Dec 2008	-$37.08M	-33.5%
Sep 2008	-$27.77M	-0.3%
Jun 2008	-$27.69M	+23.0%
Mar 2008	-$35.97M	-613.2%
Dec 2007	-$5.04M	+57.5%
Sep 2007	-$11.86M	+10.2%
Jun 2007	-$13.20M	+28.2%
Mar 2007	-$18.40M	-0.2%
Dec 2006	-$18.36M	-49.0%
Sep 2006	-$12.33M	+67.0%
Jun 2006	-$37.38M	-48.6%
Mar 2006	-$25.16M	+10.7%
Dec 2005	-$28.18M	-60.6%
Sep 2005	-$17.55M	+10.6%
Jun 2005	-$19.64M	+1.7%
Mar 2005	-$19.97M	-14.7%
Dec 2004	-$17.42M	-15.2%
Sep 2004	-$15.12M	+10.9%
Jun 2004	-$16.98M	-20.0%
Mar 2004	-$14.15M	+7.5%
Dec 2003	-$15.29M	-50.9%
Sep 2003	-$10.13M	+4.2%
Jun 2003	-$10.57M	+21.1%
Mar 2003	-$13.40M	+40.6%
Dec 2002	-$22.57M	-13.4%
Sep 2002	-$19.90M	-7.5%
Jun 2002	-$18.52M	+4.3%
Mar 2002	-$19.34M	+18.7%
Dec 2001	-$23.79M	-21.7%
Sep 2001	-$19.55M	+9.8%
Jun 2001	-$21.68M	-7.4%
Mar 2001	-$20.19M	-251.1%
Dec 1998	-$5.75M	+0.8%
Sep 1998	-$5.80M	-45.3%
Jun 1998	-$3.99M	+24.4%
Mar 1998	-$5.28M	-22.7%
Dec 1997	-$4.30M	-24.1%
Sep 1997	-$3.46M	-8.6%
Jun 1997	-$3.19M	-16.2%
Mar 1997	-$2.74M	+27.8%
Dec 1996	-$3.80M	-40.7%
Sep 1996	-$2.70M	+10.0%
Jun 1996	-$3.00M	-42.9%
Mar 1996	-$2.10M	+16.0%
Dec 1995	-$2.50M	-25.0%
Sep 1995	-$2.00M	0.0%
Jun 1995	-$2.00M	+13.0%
Mar 1995	-$2.30M	+4.2%
Dec 1994	-$2.40M	-118.2%
Sep 1994	-$1.10M	0.0%
Jun 1994	-$1.10M	-10.0%
Mar 1994	-$1.00M	-

FAQ

What is the current quarterly EBITDA of NKTR?: As of today, NKTR quarterly EBITDA is -$41.61M
What is NKTR quarterly EBITDA most recent change?: NKTR quarterly EBITDA was down -9.18% on June 30, 2026
What is 1-year change in NKTR quarterly EBITDA?: NKTR quarterly EBITDA is down -16.98% year-over-year
How far is NKTR quarterly EBITDA from its all-time high?: NKTR quarterly EBITDA is currently -104.26% below its historical high of $976.17M set on June 30, 2018
How does NKTR quarterly EBITDA rank versus sector peers?: NKTR quarterly EBITDA is higher than 12.30% of companies in Healthcare sector
When is NKTR next earnings release?: The next earnings release for NKTR is on November 12, 2026

EBITDA Formula

EBITDA = + + +

TTM EBITDA

-$129.95M$6.04M-4.87%

June 30, 2026

Summary

Current Value: As of today, NKTR TTM EBITDA is -$129.95M, down -4.87% on June 30, 2026
Historical Performance: NKTR TTM EBITDA is up +5.26% year-over-year, up +7.13% over the past 3 years
All-Time High Comparison: NKTR TTM EBITDA is currently -113.54% below its historical high of $959.86M set on June 30, 2018
3-Year Low Comparison: NKTR TTM EBITDA is +7.13% above its 3-year low of -$139.92M reached on an earlier date
Sector Comparison: NKTR TTM EBITDA is higher than 13.72% of companies in Healthcare sector

Performance

NKTR Performance
Metric	Date	Value	3M	1Y	3Y	5Y
	Jun 30, 26	-$129.95M	-4.9%	+5.3%	+7.1%	+69.0%
	Dec 31, 25	-$133.45M	–	-3.7%	+41.5%	+63.7%
	Jun 30, 26	-$41.61M	-9.2%	-17.0%	-30.5%	+61.0%
Price	Sep 4, 26	$74.19	+25.1%	+106.2%	+724.3%	-68.8%
	Sep 4, 26	-	–	–	–	–
	Jun 30, 26	$54.59M	-1.9%	-27.1%	-37.8%	-48.2%
	Jun 30, 26	-$6.70	+20.5%	-134.1%	-311.6%	-155.2%
	Jun 30, 26	-$130.64M	-4.8%	+6.1%	+12.6%	+69.8%
	Jun 30, 26	-$157.13M	+0.6%	-28.5%	+48.8%	+66.9%

TTM EBITDA Highs

NKTR TTM EBITDA Highs Comparison
Period	High	Date	Current
1Y	-$123.91M	Mar 31, 26	-4.9%
3Y	-$123.91M	Mar 31, 26	-4.9%
5Y	-$123.91M	Mar 31, 26	-4.9%
All	$959.86M	Jun 30, 18	-113.5%

TTM EBITDA Lows

NKTR TTM EBITDA Lows Comparison
Period	Low	Date	Current
1Y	-$137.17M	N/A	+5.3%
3Y	-$139.92M	N/A	+7.1%
5Y	-$438.61M	Mar 31, 22	+70.4%
All	-$438.61M	Mar 31, 22	+70.4%

TTM EBITDA History

Month	Value	Change
Jun 2026	-$129.95M	-4.9%
Mar 2026	-$123.91M	+4.5%
Dec 2025	-$129.75M	+4.0%
Sep 2025	-$135.20M	+1.4%
Jun 2025	-$137.17M	-0.4%
Mar 2025	-$136.62M	-8.8%
Dec 2024	-$125.53M	+3.6%
Sep 2024	-$130.19M	-1.2%
Jun 2024	-$128.69M	-2.5%
Mar 2024	-$125.54M	+1.5%
Dec 2023	-$127.41M	+7.0%
Sep 2023	-$136.94M	+2.1%
Jun 2023	-$139.92M	+7.6%
Mar 2023	-$151.40M	+33.6%
Dec 2022	-$228.04M	+24.0%
Sep 2022	-$300.12M	+20.0%
Jun 2022	-$375.30M	+14.4%
Mar 2022	-$438.61M	-1.3%
Dec 2021	-$433.10M	-0.7%
Sep 2021	-$429.96M	-2.4%
Jun 2021	-$419.79M	-8.3%
Mar 2021	-$387.65M	-6.0%
Dec 2020	-$365.74M	+0.2%
Sep 2020	-$366.48M	-1.2%
Jun 2020	-$361.97M	+8.4%
Mar 2020	-$395.37M	+7.8%
Dec 2019	-$429.04M	-2.6%
Sep 2019	-$418.04M	+0.2%
Jun 2019	-$418.70M	-162.9%
Mar 2019	$665.39M	-4.8%
Dec 2018	$698.80M	-11.6%
Sep 2018	$790.63M	-17.6%
Jun 2018	$959.86M	+1,754.5%
Mar 2018	-$58.01M	-139.5%
Dec 2017	-$24.22M	+48.6%
Sep 2017	-$47.12M	+68.5%
Jun 2017	-$149.43M	-5.1%
Mar 2017	-$142.14M	-45.8%
Dec 2016	-$97.50M	-6.2%
Sep 2016	-$91.83M	-55.4%
Jun 2016	-$59.10M	+9.5%
Mar 2016	-$65.30M	-383.1%
Dec 2015	-$13.52M	+46.3%
Sep 2015	-$25.19M	-146.1%
Jun 2015	$54.65M	-27.7%
Mar 2015	$75.60M	+2,224.7%
Dec 2014	-$3.56M	-137.3%
Sep 2014	$9.54M	+112.4%
Jun 2014	-$76.92M	+10.8%
Mar 2014	-$86.22M	+9.1%
Dec 2013	-$94.85M	+16.1%
Sep 2013	-$113.12M	+18.9%
Jun 2013	-$139.45M	-4.1%
Mar 2013	-$134.02M	-7.2%
Dec 2012	-$125.02M	-7.4%
Sep 2012	-$116.44M	-11.2%
Jun 2012	-$104.75M	+6.2%
Mar 2012	-$111.70M	-2.5%
Dec 2011	-$108.94M	-32.9%
Sep 2011	-$81.96M	-23.3%
Jun 2011	-$66.45M	-122.0%

Month	Value	Change
Mar 2011	-$29.93M	-3,532.3%
Dec 2010	$872.00K	-71.8%
Sep 2010	$3.09M	+115.5%
Jun 2010	-$19.99M	+62.1%
Mar 2010	-$52.78M	+34.2%
Dec 2009	-$80.25M	+30.6%
Sep 2009	-$115.64M	+2.2%
Jun 2009	-$118.27M	+0.8%
Mar 2009	-$119.23M	+7.2%
Dec 2008	-$128.51M	-33.2%
Sep 2008	-$96.48M	-19.8%
Jun 2008	-$80.57M	-21.9%
Mar 2008	-$66.08M	-36.2%
Dec 2007	-$48.50M	+21.5%
Sep 2007	-$61.82M	+0.7%
Jun 2007	-$62.29M	+28.0%
Mar 2007	-$86.46M	+7.3%
Dec 2006	-$93.22M	+9.5%
Sep 2006	-$103.04M	+4.8%
Jun 2006	-$108.27M	-19.6%
Mar 2006	-$90.53M	-6.1%
Dec 2005	-$85.34M	-14.4%
Sep 2005	-$74.58M	-3.4%
Jun 2005	-$72.15M	-3.8%
Mar 2005	-$69.49M	-9.1%
Dec 2004	-$63.67M	-3.5%
Sep 2004	-$61.54M	-8.8%
Jun 2004	-$56.55M	-12.8%
Mar 2004	-$50.14M	-1.5%
Dec 2003	-$49.39M	+12.9%
Sep 2003	-$56.67M	+14.7%
Jun 2003	-$66.44M	+10.7%
Mar 2003	-$74.39M	+7.4%
Dec 2002	-$80.33M	+1.5%
Sep 2002	-$81.55M	-0.4%
Jun 2002	-$81.20M	+3.8%
Mar 2002	-$84.36M	+1.0%
Dec 2001	-$85.21M	-38.7%
Sep 2001	-$61.42M	-46.7%
Jun 2001	-$41.87M	-107.4%
Mar 2001	-$20.19M	+3.0%
Dec 1998	-$20.82M	-7.5%
Sep 1998	-$19.37M	-13.7%
Jun 1998	-$17.03M	-4.9%
Mar 1998	-$16.23M	-18.5%
Dec 1997	-$13.69M	-3.8%
Sep 1997	-$13.20M	-6.1%
Jun 1997	-$12.43M	-1.5%
Mar 1997	-$12.24M	-5.6%
Dec 1996	-$11.60M	-12.6%
Sep 1996	-$10.30M	-7.3%
Jun 1996	-$9.60M	-11.6%
Mar 1996	-$8.60M	+2.3%
Dec 1995	-$8.80M	-1.1%
Sep 1995	-$8.70M	-11.5%
Jun 1995	-$7.80M	-13.0%
Mar 1995	-$6.90M	-23.2%
Dec 1994	-$5.60M	-75.0%
Sep 1994	-$3.20M	-52.4%
Jun 1994	-$2.10M	-110.0%
Mar 1994	-$1.00M	-

FAQ

What is the current TTM EBITDA of NKTR?: As of today, NKTR TTM EBITDA is -$129.95M
What is NKTR TTM EBITDA most recent change?: NKTR TTM EBITDA was down -4.87% on June 30, 2026
What is 1-year change in NKTR TTM EBITDA?: NKTR TTM EBITDA is up +5.26% year-over-year
How far is NKTR TTM EBITDA from its all-time high?: NKTR TTM EBITDA is currently -113.54% below its historical high of $959.86M set on June 30, 2018
How does NKTR TTM EBITDA rank versus sector peers?: NKTR TTM EBITDA is higher than 13.72% of companies in Healthcare sector
When is NKTR next earnings release?: The next earnings release for NKTR is on November 12, 2026

EBITDA Formula

EBITDA = + + +

Data Sources & References

NKTR Official Website www.nektar.com
Most Recent Annual Report (10-K) www.sec.gov/Archives/edgar/data/906709/000119312526104547/0001193125-26-104547-index.htm
NKTR Profile on Yahoo Finance finance.yahoo.com/quote/NKTR
NKTR Profile on NASDAQ.com www.nasdaq.com/market-activity/stocks/nktr