Arsanis, Inc.

SEC CIK 0001501697

CIK #1501697

The following is an index of Security and Exchange Commission registration information for Arsanis, Inc.. This page includes all SEC filing details as well as a list of any documents registered by Arsanis, Inc..
Latest Edgar Filing Status
Updated2019-02-08
SIC Code2836
IRS Number (EIN/SSN)273181608 ( EIN # 27-3181608)
Reporting File Number001-38295
Mailing Address950 WINTER STREET, SUITE 4500 WALTHAM, MASSACHUSETTS 02451
StateDELAWARE
Contact Phone781-819-5704
Fiscal Year End Date1231
Filings
Title
Date
Description
EFFECT - Notice of Effectiveness
2019-02-15 00:15:16-05:00
Notice of Effectiveness
424B3 - Prospectus [Rule 424(b)(3)]
2019-02-14 16:41:34-05:00
Prospectus [Rule 424(b)(3)]
S-4/A [Amend] - Registration of securities, business combinations
2019-02-13 16:44:50-05:00
S-4/A [Amend]
8-K - Current report
2019-02-08 16:27:30-05:00
Current report
S-3 - Registration statement under Securities Act of 1933
2019-01-25 17:04:12-05:00
S-3
8-K - Current report
2019-01-16 17:01:03-05:00
Current report
S-4 - Registration of securities, business combinations
2018-12-20 17:14:37-05:00
S-4
8-K - Current report
2018-12-20 17:09:06-05:00
Current report
425 - Prospectuses and communications, business combinations
2018-12-20 17:07:12-05:00
425
SC 13D - General statement of acquisition of beneficial ownership
2018-12-06 16:20:05-05:00
SC 13D
4 - Statement of changes in beneficial ownership of securities
2018-11-28 21:50:26-05:00
4
8-K - Current report
2018-11-27 17:22:06-05:00
Current report
425 - Prospectuses and communications, business combinations
2018-11-27 17:20:12-05:00
425
8-K - Current report
2018-11-27 07:10:10-05:00
Current report
425 - Prospectuses and communications, business combinations
2018-11-27 07:08:19-05:00
425
10-Q - Quarterly report [Sections 13 or 15(d)]
2018-11-09 08:37:31-05:00
10-Q
8-K - Current report
2018-11-09 08:15:52-05:00
Current report
SC 13G/A [Amend] - Statement of acquisition of beneficial ownership by individuals
2018-10-10 10:04:19-04:00
SC 13G/A [Amend]
CT ORDER - Confidential treatment order
2018-08-27 16:46:21-04:00
Confidential treatment order
10-Q - Quarterly report [Sections 13 or 15(d)]
2018-08-13 08:45:11-04:00
10-Q
8-K - Current report
2018-08-13 08:18:44-04:00
Current report
SC 13G/A [Amend] - Statement of acquisition of beneficial ownership by individuals
2018-08-10 11:16:32-04:00
SC 13G/A [Amend]
3 - Initial statement of beneficial ownership of securities
2018-07-17 16:28:34-04:00
3
3 - Initial statement of beneficial ownership of securities
2018-07-17 16:26:49-04:00
3
8-K - Current report
2018-06-28 07:11:02-04:00
Current report
8-K - Current report
2018-06-12 16:01:59-04:00
Current report
4 - Statement of changes in beneficial ownership of securities
2018-06-07 17:07:21-04:00
4
8-K - Current report
2018-06-07 16:38:00-04:00
Current report
4 - Statement of changes in beneficial ownership of securities
2018-06-07 16:24:54-04:00
4
4 - Statement of changes in beneficial ownership of securities
2018-06-07 16:23:51-04:00
4
4 - Statement of changes in beneficial ownership of securities
2018-06-07 16:23:15-04:00
4
4 - Statement of changes in beneficial ownership of securities
2018-06-07 16:22:03-04:00
4
4 - Statement of changes in beneficial ownership of securities
2018-06-07 16:21:08-04:00
4
4 - Statement of changes in beneficial ownership of securities
2018-06-07 16:19:46-04:00
4
4 - Statement of changes in beneficial ownership of securities
2018-06-07 16:17:58-04:00
4
10-Q - Quarterly report [Sections 13 or 15(d)]
2018-05-10 07:50:47-04:00
10-Q
8-K - Current report
2018-05-10 07:38:04-04:00
Current report
DEF 14A - Other definitive proxy statements
2018-04-23 06:15:33-04:00
DEF 14A
4 - Statement of changes in beneficial ownership of securities
2018-03-09 16:39:07-05:00
4
4 - Statement of changes in beneficial ownership of securities
2018-03-09 16:37:55-05:00
4
4 - Statement of changes in beneficial ownership of securities
2018-03-09 16:36:08-05:00
4
4 - Statement of changes in beneficial ownership of securities
2018-03-09 16:35:07-05:00
4
4 - Statement of changes in beneficial ownership of securities
2018-03-09 16:32:58-05:00
4
S-8 - Securities to be offered to employees in employee benefit plans
2018-03-09 10:05:19-05:00
S-8
10-K - Annual report [Section 13 and 15(d), not S-K Item 405]
2018-03-09 08:13:40-05:00
10-K
8-K - Current report
2018-03-09 07:27:29-05:00
Current report
4/A [Amend] - Statement of changes in beneficial ownership of securities
2018-03-08 21:20:44-05:00
4/A [Amend]
4/A [Amend] - Statement of changes in beneficial ownership of securities
2018-03-05 17:03:45-05:00
4/A [Amend]
4/A [Amend] - Statement of changes in beneficial ownership of securities
2018-03-05 17:03:14-05:00
4/A [Amend]
4/A [Amend] - Statement of changes in beneficial ownership of securities
2018-03-05 17:01:54-05:00
4/A [Amend]
4/A [Amend] - Statement of changes in beneficial ownership of securities
2018-03-05 16:59:56-05:00
4/A [Amend]
4/A [Amend] - Statement of changes in beneficial ownership of securities
2018-03-05 16:59:12-05:00
4/A [Amend]
4/A [Amend] - Statement of changes in beneficial ownership of securities
2018-03-05 16:57:25-05:00
4/A [Amend]
4/A [Amend] - Statement of changes in beneficial ownership of securities
2018-03-05 16:49:41-05:00
4/A [Amend]
SC 13D - General statement of acquisition of beneficial ownership
2018-02-14 17:22:11-05:00
SC 13D
SC 13G - Statement of acquisition of beneficial ownership by individuals
2018-02-13 17:28:43-05:00
SC 13G
SC 13G/A [Amend] - Statement of acquisition of beneficial ownership by individuals
2018-02-13 09:33:25-05:00
SC 13G/A [Amend]
SC 13D/A [Amend] - General statement of acquisition of beneficial ownership
2018-01-26 14:21:24-05:00
SC 13D/A [Amend]
SC 13G - Statement of acquisition of beneficial ownership by individuals
2017-12-11 10:37:48-05:00
SC 13G
D - Notice of Exempt Offering of Securities
2017-12-04 16:11:11-05:00
D
4 - Statement of changes in beneficial ownership of securities
2017-12-01 17:26:13-05:00
4
4 - Statement of changes in beneficial ownership of securities
2017-12-01 17:24:29-05:00
4
4 - Statement of changes in beneficial ownership of securities
2017-12-01 17:22:44-05:00
4
4 - Statement of changes in beneficial ownership of securities
2017-12-01 17:22:36-05:00
4
4 - Statement of changes in beneficial ownership of securities
2017-12-01 17:19:16-05:00
4
4 - Statement of changes in beneficial ownership of securities
2017-12-01 17:19:02-05:00
4
4 - Statement of changes in beneficial ownership of securities
2017-12-01 17:18:03-05:00
4
4 - Statement of changes in beneficial ownership of securities
2017-12-01 17:15:20-05:00
4
SC 13D - General statement of acquisition of beneficial ownership
2017-11-30 14:50:31-05:00
SC 13D
SC 13D - General statement of acquisition of beneficial ownership
2017-11-29 16:10:03-05:00
SC 13D
SC 13D - General statement of acquisition of beneficial ownership
2017-11-29 15:39:10-05:00
SC 13D
4 - Statement of changes in beneficial ownership of securities
2017-11-20 21:56:51-05:00
4
4 - Statement of changes in beneficial ownership of securities
2017-11-20 19:09:33-05:00
4
4 - Statement of changes in beneficial ownership of securities
2017-11-20 18:15:22-05:00
4
4 - Statement of changes in beneficial ownership of securities
2017-11-20 17:43:45-05:00
4
4 - Statement of changes in beneficial ownership of securities
2017-11-20 17:43:36-05:00
4
4 - Statement of changes in beneficial ownership of securities
2017-11-20 17:42:32-05:00
4
4 - Statement of changes in beneficial ownership of securities
2017-11-20 17:38:08-05:00
4
4 - Statement of changes in beneficial ownership of securities
2017-11-20 17:37:04-05:00
4
4 - Statement of changes in beneficial ownership of securities
2017-11-20 17:36:12-05:00
4
4 - Statement of changes in beneficial ownership of securities
2017-11-20 17:32:52-05:00
4
4 - Statement of changes in beneficial ownership of securities
2017-11-20 17:32:37-05:00
4
4 - Statement of changes in beneficial ownership of securities
2017-11-20 17:31:43-05:00
4
4 - Statement of changes in beneficial ownership of securities
2017-11-20 17:28:35-05:00
4
4 - Statement of changes in beneficial ownership of securities
2017-11-20 17:28:27-05:00
4
8-K - Current report
2017-11-20 17:07:02-05:00
Current report
3 - Initial statement of beneficial ownership of securities
2017-11-20 16:28:01-05:00
3
3 - Initial statement of beneficial ownership of securities
2017-11-20 16:27:31-05:00
3
3 - Initial statement of beneficial ownership of securities
2017-11-20 16:27:01-05:00
3
3 - Initial statement of beneficial ownership of securities
2017-11-20 16:26:33-05:00
3
3 - Initial statement of beneficial ownership of securities
2017-11-20 16:26:07-05:00
3
3 - Initial statement of beneficial ownership of securities
2017-11-20 16:25:35-05:00
3
3 - Initial statement of beneficial ownership of securities
2017-11-20 16:25:05-05:00
3
3 - Initial statement of beneficial ownership of securities
2017-11-20 16:24:35-05:00
3
3 - Initial statement of beneficial ownership of securities
2017-11-20 16:24:09-05:00
3
3 - Initial statement of beneficial ownership of securities
2017-11-20 16:23:38-05:00
3
3 - Initial statement of beneficial ownership of securities
2017-11-20 16:23:10-05:00
3
4 - Statement of changes in beneficial ownership of securities
2017-11-20 10:01:01-05:00
4
424B1 - Prospectus [Rule 424(b)(1)]
2017-11-16 21:30:56-05:00
Prospectus [Rule 424(b)(1)]
S-8 - Securities to be offered to employees in employee benefit plans
2017-11-16 17:31:39-05:00
S-8

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