<SEC-DOCUMENT>0001628280-26-058611-index.html : 20260824
<SEC-HEADER>0001628280-26-058611.hdr.sgml : 20260824
<ACCEPTANCE-DATETIME>20260824160432
ACCESSION NUMBER: 0001628280-26-058611
CONFORMED SUBMISSION TYPE: DEF 14A
PUBLIC DOCUMENT COUNT: 17
CONFORMED PERIOD OF REPORT: 20251231
FILED AS OF DATE: 20260824
DATE AS OF CHANGE: 20260824

FILER:

 COMPANY DATA: 
 COMPANY CONFORMED NAME: Soluna Holdings, Inc
 CENTRAL INDEX KEY: 0000064463
 STANDARD INDUSTRIAL CLASSIFICATION: FINANCE SERVICES [6199]
 ORGANIZATION NAME: 09 Crypto Assets
 EIN: 141462255
 STATE OF INCORPORATION: NV
 FISCAL YEAR END: 1231

 FILING VALUES:
 FORM TYPE: DEF 14A
 SEC ACT: 1934 Act
 SEC FILE NUMBER: 001-40261
 FILM NUMBER: 261310504

 BUSINESS ADDRESS: 
 STREET 1: 325 WASHINGTON AVENUE EXTENSION
 CITY: ALBANY
 STATE: NY
 ZIP: 12205
 BUSINESS PHONE: 518-218-2500

 MAIL ADDRESS: 
 STREET 1: 325 WASHINGTON AVENUE EXTENSION
 CITY: ALBANY
 STATE: NY
 ZIP: 12205

 FORMER COMPANY: 
 FORMER CONFORMED NAME: MECHANICAL TECHNOLOGY INC
 DATE OF NAME CHANGE: 19920703
</SEC-HEADER>
<DOCUMENT>
<TYPE>DEF 14A
<SEQUENCE>1
<FILENAME>slnh-20260824.htm
<DESCRIPTION>DEF 14A
<TEXT>
Document 1 - file: slnh-20260824.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-101.SCH
<SEQUENCE>2
<FILENAME>slnh-20260824.xsd
<DESCRIPTION>XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT
<TEXT>
Document 2 - file: slnh-20260824.xsd

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-101.DEF
<SEQUENCE>3
<FILENAME>slnh-20260824_def.xml
<DESCRIPTION>XBRL TAXONOMY EXTENSION DEFINITION LINKBASE DOCUMENT
<TEXT>
Document 3 - file: slnh-20260824_def.xml

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-101.LAB
<SEQUENCE>4
<FILENAME>slnh-20260824_lab.xml
<DESCRIPTION>XBRL TAXONOMY EXTENSION LABEL LINKBASE DOCUMENT
<TEXT>
Document 4 - file: slnh-20260824_lab.xml

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-101.PRE
<SEQUENCE>5
<FILENAME>slnh-20260824_pre.xml
<DESCRIPTION>XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE DOCUMENT
<TEXT>
Document 5 - file: slnh-20260824_pre.xml

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>6
<FILENAME>slnh-20260824_g1.jpg
<TEXT>
Document 6 - file: slnh-20260824_g1.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>7
<FILENAME>slnh-20260824_g2.jpg
<TEXT>
Document 7 - file: slnh-20260824_g2.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>XML
<SEQUENCE>9
<FILENAME>R1.htm
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
Document 9 - file: R1.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>XML
<SEQUENCE>10
<FILENAME>R2.htm
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
Document 10 - file: R2.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>XML
<SEQUENCE>11
<FILENAME>R3.htm
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
Document 11 - file: R3.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>XML
<SEQUENCE>12
<FILENAME>R4.htm
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
Document 12 - file: R4.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>XML
<SEQUENCE>13
<FILENAME>report.css
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
Document 13 - file: report.css

</DOCUMENT>
<DOCUMENT>
<TYPE>XML
<SEQUENCE>14
<FILENAME>Show.js
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
Document 14 - file: Show.js

</DOCUMENT>
<DOCUMENT>
<TYPE>XML
<SEQUENCE>16
<FILENAME>FilingSummary.xml
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
Document 16 - file: FilingSummary.html

Document 16 - RAW XML: FilingSummary.xml

</DOCUMENT>
<DOCUMENT>
<TYPE>JSON
<SEQUENCE>18
<FILENAME>MetaLinks.json
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
Document 18 - file: MetaLinks.json

</DOCUMENT>
<DOCUMENT>
<TYPE>ZIP
<SEQUENCE>19
<FILENAME>0001628280-26-058611-xbrl.zip
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
Document 19 - file: 0001628280-26-058611-xbrl.zip

</DOCUMENT>
<DOCUMENT>
<TYPE>XML
<SEQUENCE>20
<FILENAME>slnh-20260824_htm.xml
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
Document 20 - file: slnh-20260824_htm.html

Document 20 - RAW XML: slnh-20260824_htm.xml

</DOCUMENT>
</SEC-DOCUMENT>