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Mailing Address 2 TECH DRIVE SUITE 201 ANDOVER MA 01810
Business Address 2 TECH DRIVE SUITE 201 ANDOVER MA 01810 978-645-5500
MKS INSTRUMENTS INC CIK#: 0001049502 (see all company filings)

SIC: 3823 - INDUSTRIAL INSTRUMENTS FOR MEASUREMENT, DISPLAY, AND CONTROL
State location: MA | State of Inc.: MA | Fiscal Year End: 1231
(CF Office: 08 Industrial Applications and Services)
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Items 1 - 40  0001049502 Filings RSS Feed
Filings Format Description Filed/Effective File/Film Number
ARS  Documents Annual Report to Security Holders
Acc-no: 0001193125-24-078886 (34 Act)  Size: 1 MB
2024-03-27 000-23621
24791528
DEFA14A  Documents Additional definitive proxy soliciting materials and Rule 14(a)(12) material
Acc-no: 0001193125-24-078879 (34 Act)  Size: 249 KB
2024-03-27 000-23621
24791501
DEF 14A  Documents   Interactive Data Other definitive proxy statements
Acc-no: 0001193125-24-078875 (34 Act)  Size: 5 MB
2024-03-27 000-23621
24791489
EFFECT  Documents Notice of Effectiveness
Acc-no: 9999999995-24-000576 (33 Act)  Size: 1 KB
2024-02-29 333-267046
24706698
10-K  Documents   Interactive Data Annual report [Section 13 and 15(d), not S-K Item 405]
Acc-no: 0000950170-24-021071 (34 Act)  Size: 22 MB
2024-02-27 000-23621
24686330
POS AM  Documents Post-Effective amendments for registration statement
Acc-no: 0001193125-24-040691 (33 Act)  Size: 18 KB
2024-02-21 333-267046
24656343
8-K  Documents   Interactive Data Current report, items 1.01, 2.03, and 9.01
Acc-no: 0001193125-24-034098 (34 Act)  Size: 214 KB
2024-02-14 000-23621
24630899
SC 13G/A  Documents [Amend] Statement of acquisition of beneficial ownership by individuals
Acc-no: 0001104659-24-021480 (34 Act)  Size: 13 KB
2024-02-13 005-58011
24628970
SC 13G/A  Documents [Amend] Statement of acquisition of beneficial ownership by individuals
Acc-no: 0001193125-24-032330 (34 Act)  Size: 271 KB
2024-02-12 005-58011
24621626
SC 13G/A  Documents [Amend] Statement of acquisition of beneficial ownership by individuals
Acc-no: 0001422848-24-000139 (34 Act)  Size: 18 KB
2024-02-09 005-58011
24616575
SC 13G  Documents Statement of acquisition of beneficial ownership by individuals
Acc-no: 0000315066-24-001299 (34 Act)  Size: 8 KB
2024-02-09 005-58011
24611878
8-K  Documents   Interactive Data Current report, item 5.02
Acc-no: 0001193125-24-028405 (34 Act)  Size: 147 KB
2024-02-08 000-23621
24609655
8-K  Documents   Interactive Data Current report, items 2.02 and 9.01
Acc-no: 0000950170-24-012251 (34 Act)  Size: 1 MB
2024-02-07 000-23621
24604764
SC 13G/A  Documents [Amend] Statement of acquisition of beneficial ownership by individuals
Acc-no: 0001040188-24-000037 (34 Act)  Size: 44 KB
2024-02-07 005-58011
24602478
SC 13G/A  Documents [Amend] Statement of acquisition of beneficial ownership by individuals
Acc-no: 0001086364-24-002674 (34 Act)  Size: 13 KB
2024-01-24 005-58011
24557743
8-K  Documents   Interactive Data Current report, items 1.01, 2.03, 7.01, and 9.01
Acc-no: 0001193125-24-012171 (34 Act)  Size: 317 KB
2024-01-22 000-23621
24549023
SC 13G  Documents Statement of acquisition of beneficial ownership by individuals
Acc-no: 0000080255-24-000007 (34 Act)  Size: 6 KB
2024-01-10 005-58011
8-K  Documents   Interactive Data Current report, items 5.02, 7.01, and 9.01
Acc-no: 0001193125-23-287943 (34 Act)  Size: 258 KB
2023-12-04 000-23621
231461306
10-Q  Documents   Interactive Data Quarterly report [Sections 13 or 15(d)]
Acc-no: 0000950170-23-061045 (34 Act)  Size: 16 MB
2023-11-08 000-23621
231387545
8-K  Documents   Interactive Data Current report, items 2.02 and 9.01
Acc-no: 0000950170-23-057509 (34 Act)  Size: 1 MB
2023-11-01 000-23621
231368717
8-K  Documents   Interactive Data Current report, items 1.01, 2.03, 7.01, and 9.01
Acc-no: 0001193125-23-249956 (34 Act)  Size: 268 KB
2023-10-03 000-23621
231304275
10-Q  Documents   Interactive Data Quarterly report [Sections 13 or 15(d)]
Acc-no: 0000950170-23-038457 (34 Act)  Size: 18 MB
2023-08-04 000-23621
231143199
8-K  Documents   Interactive Data Current report, items 2.02 and 9.01
Acc-no: 0000950170-23-037239 (34 Act)  Size: 1 MB
2023-08-02 000-23621
231136264
SC 13G/A  Documents [Amend] Statement of acquisition of beneficial ownership by individuals
Acc-no: 0001104659-23-069839 (34 Act)  Size: 12 KB
2023-06-09 005-58011
231004808
8-K  Documents   Interactive Data Current report, items 1.01, 8.01, and 9.01
Acc-no: 0001193125-23-160751 (34 Act)  Size: 571 KB
2023-06-05 000-23621
23993039
424B7  Documents Prospectus [Rule 424(b)(7)]
Acc-no: 0001193125-23-160735 (33 Act)  Size: 415 KB
2023-06-05 333-267046
23992901
424B7  Documents Prospectus [Rule 424(b)(7)]
Acc-no: 0001193125-23-159069 (33 Act)  Size: 417 KB
2023-06-01 333-267046
23985754
SD  Documents Specialized disclosure report
Acc-no: 0001193125-23-154273 (34 Act)  Size: 292 KB
2023-05-25 000-23621
23961216
8-K  Documents   Interactive Data Current report, item 5.07
Acc-no: 0001193125-23-148206 (34 Act)  Size: 154 KB
2023-05-18 000-23621
23936545
10-Q  Documents   Interactive Data Quarterly report [Sections 13 or 15(d)]
Acc-no: 0000950170-23-018281 (34 Act)  Size: 15 MB
2023-05-05 000-23621
23893483
8-K  Documents   Interactive Data Current report, items 2.02 and 9.01
Acc-no: 0000950170-23-017248 (34 Act)  Size: 1 MB
2023-05-03 000-23621
23884610
ARS  Documents Annual Report to Security Holders
Acc-no: 0001193125-23-091662 (34 Act)  Size: 9 MB
2023-04-05 000-23621
23801312
DEFA14A  Documents Additional definitive proxy soliciting materials and Rule 14(a)(12) material
Acc-no: 0001193125-23-091660 (34 Act)  Size: 417 KB
2023-04-05 000-23621
23801306
DEF 14A  Documents   Interactive Data Other definitive proxy statements
Acc-no: 0001193125-23-091658 (34 Act)  Size: 4 MB
2023-04-05 000-23621
23801299
10-K  Documents   Interactive Data Annual report [Section 13 and 15(d), not S-K Item 405]
Acc-no: 0000950170-23-007851 (34 Act)  Size: 28 MB
2023-03-14 000-23621
23730671
NT 10-K  Documents Notification of inability to timely file Form 10-K 405, 10-K, 10-KSB 405, 10-KSB, 10-KT, or 10-KT405
Acc-no: 0000950170-23-004684 (34 Act)  Size: 83 KB
2023-02-27 000-23621
23675757
8-K  Documents   Interactive Data Current report, items 2.02 and 9.01
Acc-no: 0000950170-23-004673 (34 Act)  Size: 1 MB
2023-02-27 000-23621
23675486
8-K  Documents   Interactive Data Current report, items 8.01 and 9.01
Acc-no: 0001193125-23-034334 (34 Act)  Size: 271 KB
2023-02-13 000-23621
23614789
SC 13G/A  Documents [Amend] Statement of acquisition of beneficial ownership by individuals
Acc-no: 0001562230-23-000002 (34 Act)  Size: 18 KB
2023-02-10 005-58011
23611175
SC 13G/A  Documents [Amend] Statement of acquisition of beneficial ownership by individuals
Acc-no: 0001562230-23-000001 (34 Act)  Size: 18 KB
2023-02-10 005-58011
23610402