| simmons & simmons solutions limited | £22.1m | £20.9m | May 2018 | - | Open | Director |
| simmons wavelength limited | £2.4m | £1.6m | Jul 2019 | - | Open | Director |
| simmons & simmons (japan) limited | - | £4.5 | May 2011 | - | Open | Director |
| elexica limited | - | £2.3 | Jul 2011 | - | Open | Director |
| simmons & simmons service company limited | - | £2.2 | Mar 2011 | - | Open | Director |
| simmons & simmons middle east llp | £13.2m | - | Aug 2011 | - | Open | LLP Designated Member |
| simmons & simmons east asia llp | £1.9m | - | Aug 2011 | - | Open | LLP Designated Member |
| simmons & simmons intellectual property llp | £5.7m | - | Oct 2021 | - | Open | LLP Designated Member |
| simmons & simmons (no. 2) limited | - | - | May 2011 | - | Open | Director |
| simmons & simmons tax services llp | £1.2m | - | Apr 2018 | - | Open | LLP Designated Member |
| simmlaw services limited | - | - | Aug 2011 | - | Open | Director |
| simmons & simmons llp | £510.8m | - | Oct 2010 | - | Open | LLP Designated Member |
| simmons & simmons asia llp | £1.2m | - | Dec 2012 | - | Open | LLP Designated Member |
| simmons & simmons cee llp | £503k | - | Nov 2019 | - | Open | LLP Designated Member |
| simmons & simmons (china) limited | - | - | May 2011 | - | Open | Director |
| simmons & simmons (middle east) limited | - | - | May 2011 | - | Open | Director |
| simmons & simmons luxembourg llp | £11.8m | - | Nov 2014 | - | Open | LLP Designated Member |
| simmons & simmons cis llp | - | - | Aug 2011 | - | Open | LLP Designated Member |
| simmons & simmons global llp | - | - | Nov 2018 | - | Open | LLP Designated Member |
| sands service company (no.1) limited | - | - | May 2011 | - | Open | Director |
| simmons & simmons (no.1) limited | - | - | May 2011 | - | Open | Director |
