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Notice of Proposed Sale · 144

Vicor Corporation

VICRNASDAQEQUITYCurrent

Notice of Proposed Sale

Filed Oct 2, 2026Accepted Oct 2, 2026, 4:21 PM EDTFiling CIK 901484Accession 0001950047-26-010005
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Structured filing — 144

primary_doc.xml

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Notice of proposed sale. The proposed amounts below do not establish that a sale occurred.

Proposed-sale notice

Issuer
VICOR CORPORATION
Issuer CIK
0000751978
SEC file number
000-18277
Phone
9784702900
Person for whose account securities are to be sold
PATRIZIO VINCIARELLI
Relationships to issuer
Director · Officer · 10% Stockholder
Street
25 Frontage Road
City
Andover
State / country code
MA
Postal code
01810

Securities proposed for sale

Securities proposed for sale · 1 reported row
SecurityProposed unitsAggregate market valueUnits outstandingApproximate sale dateExchangeBroker / market maker
Common20,0006,171,800.0034,389,01410/02/2026NASDAQMorgan Stanley Smith Barney LLC Executive Financial Services

Broker / market maker — proposed row 1, entry 1

Name
Morgan Stanley Smith Barney LLC Executive Financial Services
Street
1 New York Plaza
Street (continued)
8th Floor
City
New York
State / country code
NY
Postal code
10004

Acquisition of securities to be sold

Acquisition of securities to be sold · 1 reported row
SecurityAcquiredNature of acquisitionAcquired fromAmount acquiredGift transactionPayment dateNature of payment
Common11/10/1981Founders SharesIssuer20,000N11/10/1981N/A

Sales reported in the preceding three months

Sales reported in the preceding three months · 2 reported rows
SellerSecuritySale dateAmount soldGross proceeds
10b5-1 Sales for PATRIZIO VINCIARELLICommon10/01/202620,0006,322,515.64
10b5-1 Sales for PATRIZIO VINCIARELLICommon07/06/2026700211,680.98

Seller — prior-sale row 1, entry 1

Name
10b5-1 Sales for PATRIZIO VINCIARELLI
Street
25 Frontage Road
City
Andover
State / country code
MA
Postal code
01810

Seller — prior-sale row 2, entry 1

Name
10b5-1 Sales for PATRIZIO VINCIARELLI
Street
25 Frontage Road
City
Andover
State / country code
MA
Postal code
01810

Prior-sale reporting

Nothing to report for the preceding three months
N

Notice signature

Notice date
10/02/2026
Signed
/s/ Patrizio Vinciarelli
Plan adoption dates
02/26/2026

Company context

Current securities

Recent company filings

  1. Amendments to Articles of Incorporation or Bylaws; Change in Fiscal YearSep 10, 2026
  2. Other EventsAug 27, 2026
  3. 4 filingAug 18, 2026
  4. 144 filingAug 17, 2026
  5. 144 filingAug 3, 2026

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