| Date Filed | Type | Description |
| 02/13/2012 |
SC 13G/A
| Form SC 13G/A - Statement of acquisition of beneficial ownership by individuals: [Amend] |
| 10/31/2011 |
S-8 POS
| Form S-8 POS - Securities to be offered to employees in employee benefit plans, post-effective amendments |
| 10/31/2011 |
S-8 POS
| Form S-8 POS - Securities to be offered to employees in employee benefit plans, post-effective amendments |
| 10/31/2011 |
S-8 POS
| Form S-8 POS - Securities to be offered to employees in employee benefit plans, post-effective amendments |
| 10/31/2011 |
S-8 POS
| Form S-8 POS - Securities to be offered to employees in employee benefit plans, post-effective amendments |
| 10/31/2011 |
S-8 POS
| Form S-8 POS - Securities to be offered to employees in employee benefit plans, post-effective amendments |
| 10/31/2011 |
S-8 POS
| Form S-8 POS - Securities to be offered to employees in employee benefit plans, post-effective amendments |
| 10/31/2011 |
S-8 POS
| Form S-8 POS - Securities to be offered to employees in employee benefit plans, post-effective amendments |
| 10/21/2011 |
SC 13D
| LG Acquisition Parent Corp. reports a 100% stake in ARCH CHEMICALS, INC. |
| 10/21/2011 |
25-NSE
| Form 25-NSE - Notification filed by national security exchange to report the removal from listing and registration of matured, redeemed or retired securities |
| 10/20/2011 |
8-K
| Quarterly results |
| 10/20/2011 |
GN
| Lonza Completes Acquisition of Arch Chemicals |
| 10/20/2011 |
GN
| Lonza Completes Acquisition of Arch Chemicals |
| 10/20/2011 |
SC 14D9/A
| Form SC 14D9/A - Solicitation, recommendation statements: [Amend] |
| 10/20/2011 |
SC TO-T/A
| Form SC TO-T - Tender offer statement by Third Party [amend] |
| 10/19/2011 |
SC 13D/A
| Form SC 13D - General statement of acquisition of beneficial ownership [amend] |
| 10/17/2011 |
PRN
| S&P Indices Announces Change to U.S. Index |
| 10/17/2011 |
SC TO-T/A
| Form SC TO-T - Tender offer statement by Third Party [amend] |
| 09/30/2011 |
SC TO-T/A
| Form SC TO-T - Tender offer statement by Third Party [amend] |
| 09/29/2011 |
SC TO-T/A
| Form SC TO-T - Tender offer statement by Third Party [amend] |
| 09/21/2011 |
SC 13D/A
| Form SC 13D - General statement of acquisition of beneficial ownership [amend] |
| 09/19/2011 |
SC TO-T/A
| Form SC TO-T - Tender offer statement by Third Party [amend] |
| 09/12/2011 |
SC TO-T/A
| Form SC TO-T - Tender offer statement by Third Party [amend] |
| 09/12/2011 |
8-K
| Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements... |
| 09/09/2011 |
SC 13G/A
| ARCH CHEMICALS INC reports a 4.7% stake in ARCH CHEMICALS INC |
| 08/24/2011 |
8-K/A
| Form 8-K - Current report [amend] |
| 08/19/2011 |
SC TO-T/A
| Form SC TO-T - Tender offer statement by Third Party [amend] |
| 08/11/2011 |
SC TO-T/A
| Form SC TO-T - Tender offer statement by Third Party [amend] |
| 08/10/2011 |
SC 13G/A
| ALLIANCEBERNSTEIN L.P. reports a 0.2% stake in ARCH CHEMICALS INC |
| 08/05/2011 |
10-Q
| Quarterly Report for the period ended June 30, 2011 |
| 08/05/2011 |
SC 13D
| ARCH CHEMICALS INC reports a 2.9% stake in Arch Chemicals, Inc. |
| 08/04/2011 |
SC TO-T/A
| Form SC TO-T - Tender offer statement by Third Party [amend] |
| 07/27/2011 |
SC TO-T/A
| Form SC TO-T - Tender offer statement by Third Party [amend] |
| 07/20/2011 |
SC TO-T/A
| Form SC TO-T - Tender offer statement by Third Party [amend] |
|