American Virtual Cloud Technologies, Inc.

1.03,9.01

Certification of termination of registration of a class of securities (Section 12(g))

General form for quarterly reports under Section 13 or 15(d)

8.01,9.01

Annual report pursuant to Section 13 or 15(d)

5.01

Notification of late filing of Form 10-K

2.01

1.01,8.01,9.01

7.01

1.01,9.01

1.01,9.01

Beneficial ownership report for a passive holder of more than 5% (Schedule 13G) (amendment)

Beneficial ownership report for a passive holder of more than 5% (Schedule 13G) (amendment)

Beneficial ownership report for a passive holder of more than 5% (Schedule 13G) (amendment)

Notification of removal from listing and/or registration on a national securities exchange

3.01,9.01

1.03,3.01,9.01

5.02

Prospectus Supplement for Primary Offering

Notice of Effectiveness

Correspondence with the SEC

Letter from the SEC

Registration statement under Securities Act of 1933

General form for quarterly reports under Section 13 or 15(d)

Beneficial ownership report for a passive holder of more than 5% (Schedule 13G)

1.01,3.02,8.01,9.01

1.01,3.02,8.01,9.01

Prospectus Supplement for Primary Offering

8.01

3.03,5.03,9.01

1.01,1.02,3.02,9.01

Beneficial ownership report for a holder of more than 5% (Schedule 13D) (amendment)

1.01,3.02,8.01,9.01

5.02,9.01

1.01,1.02,9.01

1.01,8.01,9.01

Prospectus Supplement for Primary Offering

General form for quarterly reports under Section 13 or 15(d)

Notification of late filing of Form 10-Q

Prospectus Supplement for Primary Offering

Prospectus Supplement for Primary Offering

Notice of Effectiveness

Correspondence with the SEC

Letter from the SEC

Registration statement under Securities Act of 1933

General form for quarterly reports under Section 13 or 15(d)

Additional Information for Proxy Statement/ Votes

06b

Definitive Proxy Statement

Preliminary Proxy Statement

Annual report pursuant to Section 13 or 15(d)

Notification of late filing of Form 10-K

Prospectus Supplement for Primary Offering

No description available

Prospectus Supplement for Primary Offering

Notice of Effectiveness

Beneficial ownership report for a passive holder of more than 5% (Schedule 13G)

Correspondence with the SEC

Letter from the SEC

No description available

Registration statement under Securities Act of 1933

Prospectus Supplement for Primary Offering

Notice of Effectiveness

Correspondence with the SEC

Letter from the SEC

06b

06b

Definitive Proxy Statement

Letter from the SEC

Correspondence with the SEC

General form for quarterly reports under Section 13 or 15(d)

Correspondence with the SEC

General form for quarterly reports under Section 13 or 15(d)

Letter from the SEC

General form for quarterly reports under Section 13 or 15(d)

Notification of late filing of Form 10-Q

Annual report pursuant to Section 13 or 15(d) (amendment)

Annual report pursuant to Section 13 or 15(d)

Additional Information for Proxy Statement/ Votes

Definitive Proxy Statement

Annual report pursuant to Section 13 or 15(d) (amendment)

Letter from the SEC

Correspondence with the SEC

No description available

Letter from the SEC

Preliminary Proxy Statement

General form for quarterly reports under Section 13 or 15(d)

General form for quarterly reports under Section 13 or 15(d)

Additional Information for Proxy Statement/ Votes

Annual report pursuant to Section 13 or 15(d)

Definitive information statement

Correspondence with the SEC

Letter from the SEC

No description available

Letter from the SEC

Definitive Proxy Statement

Correspondence with the SEC

No description available

No description available

General form for quarterly reports under Section 13 or 15(d)

No description available

No description available

Additional Information for Proxy Statement/ Votes

No description available

Additional Information for Proxy Statement/ Votes

Sweet Charles E.

Ribbon Communications Inc.

Evans Onex

Foltz Adrian

Tessler Michael

Tessler Michael

LOCKHART DENNIS P

MOCK LAWRENCE E, JR.

Tessler Michael

WILLIS ROBERT E.

WILLIS ROBERT E.

Tessler Michael

Tessler Michael

STRATOS MANAGEMENT SYSTEMS HOLDINGS LLC