Palo Alto Investors LP SEC EDGAR Filings (CIK 0001306923)

SEC EDGAR filings, ownership reports, and insider transactions for Palo Alto Investors LP.

Business address
101 University Ave, Suite 200, Palo Alto, CA, 94301
Top securities (13F)
INSM, FOLD, PTCT, ACAD, BMRN, ANAB, BIIB, DYN, UTHR, IRON, IOVA, NVCR, SNDX, GOSS, CMPX, PRTA, MIRM, ANNX, RARE, and DNLI
Top holdings (Schedule 13G)
RVNC and EHTH
State of incorporation
CA
Fiscal year end
31 December
Former names
Palo Alto Investors, LLC (to 14 Feb 2018)
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Palo Alto Investors LP has filed 478 SEC EDGAR filings since 01 Nov 2004

Latest Filings

Recent SEC filings for Palo Alto Investors LP including SCHEDULE 13G, 13F-HR, N-PX and more.

Form type Document Filing Description Filing date Reporting date File number(s)
SCHEDULE 13G Open SCHEDULE 13G document View SEC filing for SCHEDULE 13G 17 Feb 2026
13F-HR Open 13F-HR document View SEC filing for 13F-HR 17 Feb 2026 31 Dec 2025 028-11013
13F-HR Open 13F-HR document View SEC filing for 13F-HR 14 Nov 2025 30 Sep 2025 028-11013
N-PX Open N-PX document View SEC filing for N-PX 22 Aug 2025 30 Jun 2025 028-11013
13F-HR Open 13F-HR document View SEC filing for 13F-HR 14 Aug 2025 30 Jun 2025 028-11013
13F-HR Open 13F-HR document View SEC filing for 13F-HR 15 May 2025 31 Mar 2025 028-11013
13F-HR Open 13F-HR document View SEC filing for 13F-HR 14 Feb 2025 31 Dec 2024 028-11013
SCHEDULE 13G/A Open SCHEDULE 13G/A document View SEC filing for SCHEDULE 13G/A 13 Feb 2025
13F-HR Open 13F-HR document View SEC filing for 13F-HR 14 Nov 2024 30 Sep 2024 028-11013
N-PX Open N-PX document View SEC filing for N-PX 29 Aug 2024 30 Jun 2024 028-11013
13F-HR Open 13F-HR document View SEC filing for 13F-HR 14 Aug 2024 30 Jun 2024 028-11013
13F-HR Open 13F-HR document View SEC filing for 13F-HR 15 May 2024 31 Mar 2024 028-11013
13F-HR/A Open 13F-HR/A document View SEC filing for 13F-HR/A 15 Feb 2024 31 Dec 2023 028-11013
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 14 Feb 2024
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 14 Feb 2024
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 14 Feb 2024
13F-HR Open 13F-HR document View SEC filing for 13F-HR 14 Feb 2024 31 Dec 2023 028-11013
13F-HR Open 13F-HR document View SEC filing for 13F-HR 14 Nov 2023 30 Sep 2023 028-11013
13F-HR Open 13F-HR document View SEC filing for 13F-HR 14 Aug 2023 30 Jun 2023 028-11013
13F-HR Open 13F-HR document View SEC filing for 13F-HR 15 May 2023 31 Mar 2023 028-11013
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 03 Apr 2023
4 Open 4 document View SEC filing for 4 28 Mar 2023 24 Mar 2023 001-34703
13F-HR Open 13F-HR document View SEC filing for 13F-HR 14 Feb 2023 31 Dec 2022 028-11013
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 14 Feb 2023
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 14 Feb 2023
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 14 Feb 2023
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 14 Feb 2023
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 14 Feb 2023
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 14 Feb 2023
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 14 Feb 2023
13F-HR Open 13F-HR document View SEC filing for 13F-HR 14 Nov 2022 30 Sep 2022 028-11013
13F-HR Open 13F-HR document View SEC filing for 13F-HR 15 Aug 2022 30 Jun 2022 028-11013
13F-HR Open 13F-HR document View SEC filing for 13F-HR 16 May 2022 31 Mar 2022 028-11013
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 14 Feb 2022
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 14 Feb 2022
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 14 Feb 2022
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 14 Feb 2022
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 14 Feb 2022
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 14 Feb 2022
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 14 Feb 2022
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 14 Feb 2022
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 14 Feb 2022
13F-HR Open 13F-HR document View SEC filing for 13F-HR 14 Feb 2022 31 Dec 2021 028-11013
13F-HR Open 13F-HR document View SEC filing for 13F-HR 15 Nov 2021 30 Sep 2021 028-11013
13F-HR Open 13F-HR document View SEC filing for 13F-HR 16 Aug 2021 30 Jun 2021 028-11013
13F-HR Open 13F-HR document View SEC filing for 13F-HR 17 May 2021 31 Mar 2021 028-11013
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 16 Feb 2021
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 16 Feb 2021
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 16 Feb 2021
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 16 Feb 2021
13F-HR Open 13F-HR document View SEC filing for 13F-HR 16 Feb 2021 31 Dec 2020 028-11013
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 16 Feb 2021
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 16 Feb 2021
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 16 Feb 2021
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 16 Feb 2021
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 16 Feb 2021
13F-HR Open 13F-HR document View SEC filing for 13F-HR 16 Nov 2020 30 Sep 2020 028-11013
13F-HR Open 13F-HR document View SEC filing for 13F-HR 14 Aug 2020 30 Jun 2020 028-11013
13F-HR Open 13F-HR document View SEC filing for 13F-HR 15 May 2020 31 Mar 2020 028-11013
13F-HR/A Open 13F-HR/A document View SEC filing for 13F-HR/A 08 Apr 2020 31 Dec 2019 028-11013
13F-HR Open 13F-HR document View SEC filing for 13F-HR 14 Feb 2020 31 Dec 2019 028-11013
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 14 Feb 2020
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 14 Feb 2020
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 14 Feb 2020
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 14 Feb 2020
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 14 Feb 2020
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 14 Feb 2020
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 14 Feb 2020
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 14 Feb 2020
SC 13G Open SC 13G document View SEC filing for SC 13G 14 Feb 2020
SC 13D Open SC 13D document View SEC filing for SC 13D 14 Feb 2020 005-91400
SC 13D/A Open SC 13D/A document View SEC filing for SC 13D/A 14 Feb 2020 005-91400
13F-HR Open 13F-HR document View SEC filing for 13F-HR 14 Nov 2019 30 Sep 2019 028-11013
13F-HR Open 13F-HR document View SEC filing for 13F-HR 14 Aug 2019 30 Jun 2019 028-11013
13F-HR/A Open 13F-HR/A document View SEC filing for 13F-HR/A 30 Jul 2019 31 Mar 2019 028-11013
13F-HR Open 13F-HR document View SEC filing for 13F-HR 15 May 2019 31 Mar 2019 028-11013
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A SC 13G/A 19 Feb 2019
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A SC 13G/A 14 Feb 2019
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A SC 13G/A 14 Feb 2019
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A SC 13G/A 14 Feb 2019
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A SC 13G/A 14 Feb 2019
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A SC 13G/A 14 Feb 2019
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A SC 13G/A 14 Feb 2019
13F-HR Open 13F-HR document View SEC filing for 13F-HR 14 Feb 2019 31 Dec 2018 028-11013
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A SC 13G/A 14 Feb 2019
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A SC 13G/A 14 Feb 2019
13F-HR Open 13F-HR document View SEC filing for 13F-HR 14 Nov 2018 30 Sep 2018 028-11013
13F-HR Open 13F-HR document View SEC filing for 13F-HR 14 Aug 2018 30 Jun 2018 028-11013
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 25 Jun 2018
13F-HR Open 13F-HR document View SEC filing for 13F-HR 15 May 2018 31 Mar 2018 028-11013
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 14 Feb 2018
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 14 Feb 2018
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 14 Feb 2018
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 14 Feb 2018
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 14 Feb 2018
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 14 Feb 2018
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 14 Feb 2018
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 14 Feb 2018
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 14 Feb 2018
13F-HR Open 13F-HR document View SEC filing for 13F-HR 14 Feb 2018 31 Dec 2017 028-11013
13F-HR Open 13F-HR document View SEC filing for 13F-HR 14 Nov 2017 30 Sep 2017 028-11013
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 12 Oct 2017
13F-HR Open 13F-HR document View SEC filing for 13F-HR 14 Aug 2017 30 Jun 2017 028-11013
13F-HR Open 13F-HR document View SEC filing for 13F-HR 15 May 2017 31 Mar 2017 028-11013
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 03 Apr 2017
13F-HR Open 13F-HR document View SEC filing for 13F-HR 15 Feb 2017 31 Dec 2016 028-11013
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 13 Jan 2017
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 13 Jan 2017
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 13 Jan 2017
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 12 Jan 2017
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 12 Jan 2017
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 12 Jan 2017
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 12 Jan 2017
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 12 Jan 2017
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 12 Jan 2017
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 12 Jan 2017
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 12 Jan 2017
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 12 Jan 2017
13F-HR Open 13F-HR document View SEC filing for 13F-HR 14 Nov 2016 30 Sep 2016 028-11013
13F-HR/A Open 13F-HR/A document View SEC filing for 13F-HR/A 16 Aug 2016 30 Jun 2016 028-11013
13F-HR Open 13F-HR document View SEC filing for 13F-HR 15 Aug 2016 30 Jun 2016 028-11013
13F-HR Open 13F-HR document View SEC filing for 13F-HR 16 May 2016 31 Mar 2016 028-11013
13F-HR Open 13F-HR document View SEC filing for 13F-HR 16 Feb 2016 31 Dec 2015 028-11013
SC 13G Open SC 13G document View SEC filing for SC 13G 16 Feb 2016
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 16 Feb 2016
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 16 Feb 2016
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 16 Feb 2016
SC 13G Open SC 13G document View SEC filing for SC 13G 16 Feb 2016
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 16 Feb 2016
SC 13G Open SC 13G document View SEC filing for SC 13G 16 Feb 2016
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 16 Feb 2016
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 16 Feb 2016
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 16 Feb 2016
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 16 Feb 2016
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A SC 13G/A 16 Feb 2016
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A SC 13G/A 16 Feb 2016
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A SC 13G/A 16 Feb 2016
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A SC 13G/A 16 Feb 2016
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A SC 13G/A 16 Feb 2016
13F-HR Open 13F-HR document View SEC filing for 13F-HR 16 Nov 2015 30 Sep 2015 028-11013
13F-HR Open 13F-HR document View SEC filing for 13F-HR 14 Aug 2015 30 Jun 2015 028-11013
13F-HR Open 13F-HR document View SEC filing for 13F-HR 15 May 2015 31 Mar 2015 028-11013
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 08 May 2015
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 13G/A 18 Feb 2015
SC 13G Open SC 13G document View SEC filing for SC 13G 13G/A 18 Feb 2015
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A SC 13G/A 18 Feb 2015
SC 13G Open SC 13G document View SEC filing for SC 13G 13G/A 18 Feb 2015
SC 13G Open SC 13G document View SEC filing for SC 13G 13G 18 Feb 2015
SC 13G Open SC 13G document View SEC filing for SC 13G SC 13G 18 Feb 2015
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A SC 13G/A 18 Feb 2015
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A SC 13G/A 18 Feb 2015
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A SC 13G/A 18 Feb 2015
SC 13G Open SC 13G document View SEC filing for SC 13G SC 13G 18 Feb 2015
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A SC 13G/A 18 Feb 2015
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A SC 13G/A 18 Feb 2015
SC 13G Open SC 13G document View SEC filing for SC 13G SC 13G 18 Feb 2015
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A SC 13G/A 18 Feb 2015
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A SC 13G/A 18 Feb 2015
13F-HR Open 13F-HR document View SEC filing for 13F-HR 17 Feb 2015 31 Dec 2014 028-11013
13F-HR Open 13F-HR document View SEC filing for 13F-HR 13 Nov 2014 30 Sep 2014 028-11013
SC 13G Open SC 13G document View SEC filing for SC 13G 08 Oct 2014
13F-HR Open 13F-HR document View SEC filing for 13F-HR 14 Aug 2014 30 Jun 2014 028-11013
13F-HR/A Open 13F-HR/A document View SEC filing for 13F-HR/A 16 May 2014 31 Mar 2014 028-11013
13F-HR Open 13F-HR document View SEC filing for 13F-HR 15 May 2014 31 Mar 2014 028-11013
SC 13G Open SC 13G document View SEC filing for SC 13G 14 Feb 2014
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 14 Feb 2014
SC 13G Open SC 13G document View SEC filing for SC 13G 14 Feb 2014
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 14 Feb 2014
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 14 Feb 2014
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 14 Feb 2014
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 14 Feb 2014
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 14 Feb 2014
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 14 Feb 2014
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 14 Feb 2014
SC 13G Open SC 13G document View SEC filing for SC 13G 14 Feb 2014
13F-HR Open 13F-HR document View SEC filing for 13F-HR 13 Feb 2014 31 Dec 2013 028-11013
13F-HR/A Open 13F-HR/A document View SEC filing for 13F-HR/A 20 Nov 2013 30 Sep 2013 028-11013
13F-HR Open 13F-HR document View SEC filing for 13F-HR 13 Nov 2013 30 Sep 2013 028-11013
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A AMENDMENT NO. 14 12 Nov 2013
SC 13G Open SC 13G document View SEC filing for SC 13G SC 13G 09 Sep 2013
13F-HR Open 13F-HR document View SEC filing for 13F-HR 14 Aug 2013 30 Jun 2013 028-11013
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A AMENDMENT 1 30 Jul 2013
13F-HR Open 13F-HR document View SEC filing for 13F-HR NONE 14 May 2013 31 Mar 2013 028-11013
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 14 Feb 2013
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 14 Feb 2013
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 14 Feb 2013
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 14 Feb 2013
SC 13G Open SC 13G document View SEC filing for SC 13G 14 Feb 2013
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 14 Feb 2013
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 14 Feb 2013
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 14 Feb 2013
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 14 Feb 2013
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 14 Feb 2013
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 14 Feb 2013
13F-HR Open 13F-HR document View SEC filing for 13F-HR NONE 13 Feb 2013 31 Dec 2012 028-11013
13F-HR Open 13F-HR document View SEC filing for 13F-HR NONE 14 Nov 2012 30 Sep 2012 028-11013
3 Open 3 document View SEC filing for 3 OWNERSHIP DOCUMENT 11 Oct 2012 01 Oct 2012 001-34703
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A ALIMERA SCIENCES, INC. - SCH 13G/A NO. 2 11 Oct 2012
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A AMAG SCHEDULE 13G AMENDMENT #3 - 09-14-12 14 Sep 2012
13F-HR Open 13F-HR document View SEC filing for 13F-HR NONE 15 Aug 2012 30 Jun 2012 028-11013
13F-HR Open 13F-HR document View SEC filing for 13F-HR NONE 15 May 2012 31 Mar 2012 028-11013
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A ALIMERA SCIENCES, INC. - SCH 13G-AMENDMENT NO. 1 05 Apr 2012
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A VIROPHARMA INCORPORATED - SCH 13G AMENDMENT NO. 2 13 Feb 2012
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A STAAR SURGICAL COMPANY - SCH 13G AMENDMENT NO. 1 13 Feb 2012
SC 13G Open SC 13G document View SEC filing for SC 13G AUXILIUM PHARMACEUTICALS, INC. - SCH 13G 13 Feb 2012
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A AMICUS THERAPEUTICS, INC. - SCH 13G AMENDMENT NO. 8 13 Feb 2012
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A AMAG PHARMACEUTICALS, INC. - SCH 13G AMENDMENT NO. 2 13 Feb 2012
SC 13G Open SC 13G document View SEC filing for SC 13G ALIMERA SCIENCES, INC. - SCH 13G 13 Feb 2012
SC 13G Open SC 13G document View SEC filing for SC 13G SEQUENOM INC. - SCH 13G 13 Feb 2012
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A SAVIENT PHARMACEUTICALS, INC. - SCH 13G AMENDMENT NO. 12 13 Feb 2012
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A NORTHERN OIL & GAS, INC. - SCH 13G AMENDMENT NO. 3 13 Feb 2012
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A MOMENTA PHARMACEUTICALS, INC. - SCH 13G AMENDMENT NO. 1 13 Feb 2012
13F-HR Open 13F-HR document View SEC filing for 13F-HR NONE 13 Feb 2012 31 Dec 2011 028-11013
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A INTERCLICK, INC. - SCH 13G AMENDMENT NO. 2 13 Feb 2012
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A CYBERONICS, INC. - SCH 13G AMENDMENT NO. 6 13 Feb 2012
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A CERAGON NETWORKS LTD. - SCH 13G AMENDMENT NO. 3 13 Feb 2012
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A TRIANGLE PETROLEUM CORPORATION - SCH 13G AMENDMENT NO. 3 13 Feb 2012
13F-HR Open 13F-HR document View SEC filing for 13F-HR NONE 14 Nov 2011 30 Sep 2011 028-11013
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A SCHEDULE 13G AMENDMENT 1 14 Nov 2011
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A SAVIENT PHARMACEUTICALS SCH-13G-A NO. 11 11 Oct 2011
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A BROADVISION SCHEDULE 13G-A NO. 6 11 Oct 2011
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A AMICUS THERAPEUTICS 13G/A#7 14 Sep 2011
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A AMICUS THERAPEUTICS 13G/A#7 12 Sep 2011
SC 13G Open SC 13G document View SEC filing for SC 13G AMAG PHARMACEUTICALS, INC. - SCH 13G 25 Aug 2011
13F-HR Open 13F-HR document View SEC filing for 13F-HR 12 Aug 2011 30 Jun 2011 028-11013
13F-HR Open 13F-HR document View SEC filing for 13F-HR 16 May 2011 31 Mar 2011 028-11013
13F-HR Open 13F-HR document View SEC filing for 13F-HR 11 Feb 2011 31 Dec 2010 028-11013
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A VIROPHARMA INCORPORATED SCHEDULE 13G-A NO. 1 11 Feb 2011
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A TOREADOR RESOURCES CORPORATION SCHEDULE 13D-A NO. 1 11 Feb 2011
SC 13G Open SC 13G document View SEC filing for SC 13G STAAR SURGICAL COMPANY SCH. 13G 11 Feb 2011
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A SAVIENT PHARMACEUTICALS SCH-13G-A NO. 10 11 Feb 2011
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A NORTHERN OIL & GAS INC. SCH13D-A NO.2 11 Feb 2011
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A INTERCLICK, INC. SCHEDULE 13G-A NO. 1 11 Feb 2011
SC 13G Open SC 13G document View SEC filing for SC 13G MOMENTA PHARMACEUTICALS SCHEDULE 13G 11 Feb 2011
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A CYBERONICS, INC. SCH 13D-A NO. 5 11 Feb 2011
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A CEREGON NETWORKS LTD SCH13D-A NO.2 11 Feb 2011
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A BROADVISION SCHEDULE 13G-A NO. 5 11 Feb 2011
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A AMICUS THERAPEUTICS, INC. SCHEDULE 13G-A NO. 6 11 Feb 2011
SC 13D/A Open SC 13D/A document View SEC filing for SC 13D/A AMAG SCHEDULE 13D AMENDMENT NO. 4 26 Jan 2011
SC 13D/A Open SC 13D/A document View SEC filing for SC 13D/A SCHEDULE 13D AMENDMENT 3 03 Jan 2011
SC 13D/A Open SC 13D/A document View SEC filing for SC 13D/A SCHEDULE 13D-2 AMAG 23 Dec 2010
SC 13D/A Open SC 13D/A document View SEC filing for SC 13D/A SCHEDULE 13D, AMENDMENT 1 09 Dec 2010
SC 13G Open SC 13G document View SEC filing for SC 13G SCHEDULE 13G 06 Dec 2010
SC 13D Open SC 13D document View SEC filing for SC 13D 23 Nov 2010
13F-HR Open 13F-HR document View SEC filing for 13F-HR 15 Nov 2010 30 Sep 2010 028-11013
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 12 Oct 2010
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 08 Sep 2010
SC 13D/A Open SC 13D/A document View SEC filing for SC 13D/A GASTAR EXPLORATION LTD SCHEDULE 13D AMENDMENT #8 03 Sep 2010
SC 13D/A Open SC 13D/A document View SEC filing for SC 13D/A GASTAR EXPLORATION LTD SCHEDULE 13D AMENDMENT #7 02 Sep 2010
SC 13D/A Open SC 13D/A document View SEC filing for SC 13D/A GASTAR EXPLORATION LTD. SCHEDULE 13D AMENDMENT NO. 6 31 Aug 2010
13F-HR Open 13F-HR document View SEC filing for 13F-HR 13 Aug 2010 30 Jun 2010 028-11013
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A TRIANGLE PETROLEUM CORPORATION SCHEDULE 13G AMENDMENT NO. 1 09 Jun 2010
SC 13D/A Open SC 13D/A document View SEC filing for SC 13D/A CANADIAN SUPERIOR ENERGY INC. 25 May 2010
SC 13D/A Open SC 13D/A document View SEC filing for SC 13D/A GASTAR EXPLORATION LTD. SCHEDULE 13D AMENDMENT NO. 5 17 May 2010
13F-HR Open 13F-HR document View SEC filing for 13F-HR 14 May 2010 31 Mar 2010 028-11013
SC 13G Open SC 13G document View SEC filing for SC 13G TRIANGLE PETROLEUM CORPORATION SCHEDULE 13G 04 May 2010
SC 13G Open SC 13G document View SEC filing for SC 13G 13 Apr 2010
SC 13D/A Open SC 13D/A document View SEC filing for SC 13D/A 13 Apr 2010
SC 13G Open SC 13G document View SEC filing for SC 13G 16 Feb 2010
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 16 Feb 2010
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 16 Feb 2010
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 16 Feb 2010
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 16 Feb 2010
SC 13G Open SC 13G document View SEC filing for SC 13G 16 Feb 2010
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 16 Feb 2010
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 16 Feb 2010
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 16 Feb 2010
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 16 Feb 2010
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 16 Feb 2010
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 16 Feb 2010
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 16 Feb 2010
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 16 Feb 2010
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 16 Feb 2010
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 16 Feb 2010
13F-HR Open 13F-HR document View SEC filing for 13F-HR 12 Feb 2010 31 Dec 2009 028-11013
SC 13D/A Open SC 13D/A document View SEC filing for SC 13D/A GASTAR EXPLORATION LTD. SCHEDULE 13D AMENDMENT NO. 4 19 Jan 2010
SC 13D/A Open SC 13D/A document View SEC filing for SC 13D/A GASTAR EXPLORATION LTD. SCHEDULE 13D AMENDMENT NO. 3 14 Jan 2010

About this filer

Palo Alto Investors LP files with the SEC under CIK 0001306923. This page aggregates EDGAR filings and related ownership activity.

See reporting owner transactions.

FAQ

What is a CIK?
A Central Index Key (CIK) is a unique identifier assigned by the SEC to each filer.
Why are some filings missing?
New filings appear as the SEC updates EDGAR, and older records can vary by availability.
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Updates follow new EDGAR submissions and periodic data refreshes.

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