| # | Title | Name | Region | Comment | Date |
|---|---|---|---|---|---|
| 601 | N/G | Anonymous | N/G | N/G | May 17, 2011 |
| 602 | Dr | Nader Saffari | N/G | N/G | May 17, 2011 |
| 603 | Dr | Helena Titheridge | N/G | N/G | May 17, 2011 |
| 604 | N/G | Anthony Steed | N/G | N/G | May 17, 2011 |
| 605 | Dr | Oleg Mitrofanov | N/G | N/G | May 17, 2011 |
| 606 | Dr | Gerald Roberts | N/G | N/G | May 17, 2011 |
| 607 | Dr | Samantha Thompson | UK | View | May 17, 2011 |
| 608 | N/G | R Moore | N/G | N/G | May 17, 2011 |
| 609 | Dr | Peter Domone | UK | View | May 17, 2011 |
| 610 | Dr | Francesco Lescai | N/G | N/G | May 17, 2011 |
| 611 | Dr | Vincent Plagnol | UK | N/G | May 17, 2011 |
| 612 | Ms | Brighid Lowe | N/G | View | May 17, 2011 |
| 613 | Dr. | Anthony Eugene Lynas-Gray | UK | View | May 17, 2011 |
| 614 | Dr | Duncan Greig | N/G | View | May 17, 2011 |
| 615 | Prof | Andrew Stockman | UK | N/G | May 17, 2011 |
| 616 | Dr | Alexander Hergovich | N/G | N/G | May 17, 2011 |
| 617 | Prof. | Evelyn Fishburn | UK | View | May 17, 2011 |
| 618 | Dr | Marcus Fruttiger | UK | N/G | May 17, 2011 |
| 619 | Dr | Roland-Francois Lack | UK | N/G | May 17, 2011 |
| 620 | Dr | Fiona Stevenson | N/G | View | May 17, 2011 |
| 621 | Dr | Frances Lefford | N/G | N/G | May 17, 2011 |
| 622 | Dr | Jennifer Small | UK | N/G | May 17, 2011 |
| 623 | Prof. | Ofer Lahav | N/G | View | May 17, 2011 |
| 624 | Dr | John Talbot | UK | N/G | May 17, 2011 |
| 625 | Dr | Corinna Riva | N/G | N/G | May 17, 2011 |
| 626 | Dr | Peter Howell | UK | View | May 17, 2011 |
| 627 | Ms | faith miles | UK | N/G | May 17, 2011 |
| 628 | Professor | Monty Mythen | N/G | N/G | May 17, 2011 |
| 629 | Dr | Jackie Lees | UK | View | May 17, 2011 |
| 630 | Dr | Thusu Bindra | N/G | View | May 17, 2011 |
| 631 | N/G | Jayne Parker | UK | N/G | May 17, 2011 |
| 632 | Professor | Franco Cacialli | UK | N/G | May 17, 2011 |
| 633 | Dr | Paola Oliveri | N/G | N/G | May 17, 2011 |
| 634 | Dr. | Sherwood Wise, Jr. | USA | View | May 17, 2011 |
| 635 | Dr | Ahsan Nazir | N/G | N/G | May 17, 2011 |
| 636 | Dr | Sebastian Meier | Germany | View | May 17, 2011 |
| 637 | DR | Jun Wang | N/G | N/G | May 18, 2011 |
| 638 | Professor | Julian Hoppit | N/G | Hidden | May 18, 2011 |
| 639 | Dr | Alexandra Olaya-Castro | N/G | View | May 18, 2011 |
| 640 | Dr | P Jones | N/G | N/G | May 18, 2011 |
| 641 | mr | alan taylor | UK | N/G | May 18, 2011 |
| 642 | N/G | Irene Pérez | Spain | N/G | May 18, 2011 |
| 643 | Prof | H Valerie Curran | N/G | N/G | May 18, 2011 |
| 644 | N/G | David Brown | UK | View | May 18, 2011 |
| 645 | Dr | Edward Bailey | UK | N/G | May 18, 2011 |
| 646 | Dr | Joe Flatman | UK | N/G | May 18, 2011 |
| 647 | Dr | Elizabeth Shepherd | N/G | N/G | May 18, 2011 |
| 648 | Dr | Eleanor Stride | UK | N/G | May 18, 2011 |
| 649 | Dr | Anonymous | UK | View | May 18, 2011 |
| 650 | Professor | Mairéad Hanrahan | N/G | N/G | May 18, 2011 |
- S/C/P - State, County or Province
- Dates displayed in the signature list are based on UTC/GMT
- Anonymous signatures signify people who have chosen not to display their names publicly
- A comment in gray indicates that the signer has hidden their comment from public view