| Date Filed | Type | Description |
| 02/22/2021 |
SC 13D/A
| Form SC 13D/A - General statement of acquisition of beneficial ownership: [Amend] |
| 04/01/2020 |
SC 13D/A
| Swenson Nicholas John reports a 43.4% stake in AIR T, INC. |
| 06/19/2014 |
SC 13D/A
| Form SC 13D/A - General statement of acquisition of beneficial ownership: [Amend] |
| 05/05/2014 |
SC 13D/A
| Form SC 13D/A - General statement of acquisition of beneficial ownership: [Amend] |
| 04/14/2014 |
SC 13D/A
| Form SC 13D/A - General statement of acquisition of beneficial ownership: [Amend] |
| 12/23/2013 |
SC 13D/A
| Swenson Nicholas John reports a 21.4% stake in PRO-DEX, INC. |
| 11/20/2013 |
SC 13D/A
| Swenson Nicholas John reports a 0% stake in ELECTRO-SENSORS, INC. |
| 11/01/2013 |
SC 13D
| Form SC 13D - General statement of acquisition of beneficial ownership: |
| 06/19/2013 |
SC 13D/A
| Swenson Nicholas John reports a 20.2% stake in PRO-DEX, INC. |
| 04/18/2013 |
SC 13D/A
| Form SC 13D - General statement of acquisition of beneficial ownership [amend] |
| 03/15/2013 |
SC 13D/A
| Form SC 13D - General statement of acquisition of beneficial ownership [amend] |
| 03/15/2013 |
SC 13D/A
| Form SC 13D - General statement of acquisition of beneficial ownership [amend] |
| 03/04/2013 |
SC 13D/A
| Swenson Nicholas John reports a 15.9% stake in PRO-DEX, INC. |
| 02/25/2013 |
SC 13G/A
| Form SC 13G - Statement of acquisition of beneficial ownership by individuals [amend] |
| 02/15/2013 |
SC 13D/A
| Form SC 13D - General statement of acquisition of beneficial ownership [amend] |
| 10/04/2012 |
SC 13G
| Form SC 13G - Statement of acquisition of beneficial ownership by individuals |
| 03/09/2012 |
SC 13D/A
| Form SC 13D - General statement of acquisition of beneficial ownership [amend] |
| 03/09/2012 |
SC 13D/A
| Form SC 13D - General statement of acquisition of beneficial ownership [amend] |
| 01/27/2012 |
SC 13D
| Form SC 13D - General statement of acquisition of beneficial ownership |
| 12/27/2011 |
SC 13D/A
| Form SC 13D - General statement of acquisition of beneficial ownership [amend] |
| 12/09/2011 |
SC 13D/A
| Swenson Nicholas John reports a 12.2% stake in PRO-DEX, INC. |
| 12/09/2011 |
SC 13D/A
| Swenson Nicholas John reports a 12.4% stake in ELECTRO-SENSORS, INC. |
| 09/14/2011 |
SC 13D/A
| Swenson Nicholas John reports a 8% stake in PRO-DEX, INC. |
| 08/30/2011 |
SC 13D/A
| Swenson Nicholas John reports a 11.7% stake in ELECTRO-SENSORS, INC. |
| 07/28/2011 |
SC 13D
| Form SC 13D - General statement of acquisition of beneficial ownership |
| 03/16/2011 |
SC 13D/A
| Swenson Nicholas John has filed a Schedule 13D for ELECTRO-SENSORS, INC. |
| 10/08/2010 |
SC 13D/A
| Form SC 13D - General statement of acquisition of beneficial ownership [amend] |
| 05/06/2010 |
SC 13D/A
| Swenson Nicholas John has filed a Schedule 13D for ELECTRO-SENSORS, INC. |
| 12/04/2009 |
SC 13D
| Swenson Nicholas John has filed a Schedule 13D for ELECTRO-SENSORS, INC. |