Below are the 35 dividends IOSP has paid to shareholders.
| # | Declaration Date | Amount | Ex-Date | Record Date | Pay Date |
|---|---|---|---|---|---|
| 35 | Tue, Nov 7, 2023 | $0.72 | Fri, Nov 17, 2023 | Mon, Nov 20, 2023 | Mon, Nov 27, 2023 |
| 34 | Wed, May 3, 2023 | $0.69 | Fri, May 19, 2023 | Mon, May 22, 2023 | Wed, May 31, 2023 |
| 33 | Tue, Nov 8, 2022 | $0.65 | Fri, Nov 18, 2022 | Mon, Nov 21, 2022 | Mon, Nov 28, 2022 |
| 32 | Tue, May 3, 2022 | $0.63 | Mon, May 16, 2022 | Tue, May 17, 2022 | Thu, May 26, 2022 |
| 31 | Tue, Nov 2, 2021 | $0.59 | Mon, Nov 15, 2021 | Tue, Nov 16, 2021 | Wed, Nov 24, 2021 |
| 30 | Tue, May 4, 2021 | $0.57 | Fri, May 14, 2021 | Mon, May 17, 2021 | Wed, May 26, 2021 |
| 29 | Tue, Nov 3, 2020 | $0.52 | Mon, Nov 16, 2020 | Tue, Nov 17, 2020 | Wed, Nov 25, 2020 |
| 28 | Tue, May 5, 2020 | $0.52 | Fri, May 15, 2020 | Mon, May 18, 2020 | Tue, May 26, 2020 |
| 27 | Tue, Nov 5, 2019 | $0.52 | Mon, Nov 18, 2019 | Tue, Nov 19, 2019 | Wed, Nov 27, 2019 |
| 26 | Tue, May 7, 2019 | $0.50 | Mon, May 20, 2019 | Tue, May 21, 2019 | Thu, May 30, 2019 |
| 25 | Tue, Nov 6, 2018 | $0.45 | Fri, Nov 16, 2018 | Mon, Nov 19, 2018 | Thu, Nov 29, 2018 |
| 24 | Tue, May 8, 2018 | $0.44 | Fri, May 18, 2018 | Mon, May 21, 2018 | Thu, May 31, 2018 |
| 23 | Tue, Nov 7, 2017 | $0.39 | Wed, Nov 15, 2017 | Thu, Nov 16, 2017 | Mon, Nov 27, 2017 |
| 22 | Tue, May 9, 2017 | $0.38 | Thu, May 18, 2017 | Mon, May 22, 2017 | Wed, May 31, 2017 |
| 21 | Wed, Nov 2, 2016 | $0.34 | Thu, Nov 10, 2016 | Tue, Nov 15, 2016 | Thu, Nov 24, 2016 |
| 20 | Tue, May 3, 2016 | $0.33 | Thu, May 12, 2016 | Mon, May 16, 2016 | Wed, May 25, 2016 |
| 19 | Tue, Nov 3, 2015 | $0.31 | Thu, Nov 12, 2015 | Mon, Nov 16, 2015 | Wed, Nov 25, 2015 |
| 18 | Wed, May 6, 2015 | $0.30 | Thu, May 14, 2015 | Mon, May 18, 2015 | Wed, May 27, 2015 |
| 17 | Tue, Nov 4, 2014 | $0.28 | Thu, Nov 13, 2014 | Mon, Nov 17, 2014 | Wed, Nov 26, 2014 |
| 16 | Wed, May 7, 2014 | $0.27 | Thu, May 15, 2014 | Mon, May 19, 2014 | Wed, May 28, 2014 |
| 15 | Tue, Nov 5, 2013 | $0.50 | Thu, Nov 14, 2013 | Mon, Nov 18, 2013 | Wed, Nov 27, 2013 |
| 14 | Mon, Dec 3, 2012 | $2.00 | Wed, Dec 12, 2012 | Fri, Dec 14, 2012 | Fri, Dec 21, 2012 |
| 13 | Tue, Feb 24, 2009 | $0.05 | Thu, Mar 12, 2009 | Mon, Mar 16, 2009 | Mon, Apr 6, 2009 |
| 12 | Tue, Feb 26, 2008 | $0.05 | Wed, Mar 12, 2008 | Fri, Mar 14, 2008 | Fri, Apr 4, 2008 |
| 11 | Thu, Dec 13, 2007 | $0.05 | Wed, Aug 27, 2008 | Mon, Sep 1, 2008 | Mon, Oct 6, 2008 |
| 10 | Tue, Aug 14, 2007 | $0.05 | Thu, Aug 30, 2007 | Tue, Sep 4, 2007 | Mon, Oct 8, 2007 |
| 9 | Tue, Feb 20, 2007 | $0.05 | Thu, Mar 1, 2007 | Mon, Mar 5, 2007 | Mon, Apr 2, 2007 |
| 8 | Mon, Aug 21, 2006 | $0.04 | Wed, Aug 30, 2006 | Fri, Sep 1, 2006 | Sun, Oct 1, 2006 |
| 7 | Tue, Feb 14, 2006 | $0.04 | Tue, Feb 21, 2006 | Thu, Feb 23, 2006 | Sat, Apr 1, 2006 |
| 6 | Fri, Aug 12, 2005 | $0.04 | Mon, Aug 29, 2005 | Wed, Aug 31, 2005 | Fri, Sep 30, 2005 |
| 5 | Fri, Jan 7, 2005 | $0.04 | Wed, Feb 16, 2005 | Fri, Feb 18, 2005 | Fri, Apr 1, 2005 |
| 4 | Thu, Aug 12, 2004 | $0.03 | Wed, Aug 18, 2004 | Fri, Aug 20, 2004 | Fri, Oct 1, 2004 |
| 3 | Tue, Feb 10, 2004 | $0.03 | Wed, Feb 18, 2004 | Fri, Feb 20, 2004 | Thu, Apr 1, 2004 |
| 2 | Mon, May 5, 2003 | $0.03 | Fri, May 16, 2003 | Tue, May 20, 2003 | Tue, Jun 17, 2003 |
| 1 | Wed, Aug 14, 2002 | $0.03 | Thu, Aug 22, 2002 | Mon, Aug 26, 2002 | Mon, Sep 30, 2002 |
| # | Declaration Date | Amount | Ex-Date | Record Date | Pay Date |
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