SEC EDGAR filings, ownership reports, and insider transactions for David Ludvigson.
| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 16 Dec 2022 | 01 Dec 2022 | 000-54586 |
| 3 | Open Document | Open Filing | 29 Jun 2021 | 04 Jun 2021 | 000-54586 | |
| 4 | Open Document | Open Filing | 4 | 11 Mar 2015 | 10 Mar 2015 | 000-24541 |
| 4 | Open Document | Open Filing | 4 | 29 Aug 2013 | 27 Aug 2013 | 000-24541 |
| 4 | Open Document | Open Filing | 4 | 30 Aug 2012 | 27 Aug 2012 | 000-24541 |
| 4 | Open Document | Open Filing | 4 | 19 Jan 2012 | 17 Jan 2012 | 000-24541 |
| 4 | Open Document | Open Filing | 4 | 29 Sep 2010 | 28 Sep 2010 | 000-24541 |
| 3 | Open Document | Open Filing | 3 | 23 Jul 2010 | 16 Jul 2010 | 000-24541 |