XOOMAR

Soluna Holdings (SLNH)

Soluna Holdings on one page: short interest, daily short volume, fails to deliver, planned sales, large holders, 13F holders, financials, earnings dates and insider trades. Listed on Nasdaq, classified by the SEC as finance services.

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25.1M

Short interest

settlement 2026-09-30

3.8

Days to cover

+0.3 days vs prior

56.2%

Short share of volume

2026-10-12

2,149

Fails to deliver

settlement 2026-09-11

Mon 16 Nov

Next earnings

estimated date

$66K

Insider flow, 90 days

4 buys, 2 sells

As of 2026-10-12.

Short interest

FINRA, twice a month. The newest 24 settlements in the table, 48 in the chart. JSON

As of 30 September 2026, short interest in SLNH is 25,077,385 shares, down 171,089 shares over the last month. Over the last 48 readings it ranged from 132,129 shares (29 November 2024) to 34,410,087 shares (15 July 2026). At the reported average volume of 6.7M shares a day that is 3.8 days to cover.

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SettlementShares shortChangeAvg daily volumeDays to cover
2026-09-3025,077,385+3.0%6,683,6343.75
2026-09-1524,350,586-3.6%7,070,3063.44
2026-08-3125,248,474-13.9%10,013,5142.52
2026-08-1429,329,617+14.3%9,237,3933.18
2026-07-3125,656,561-25.4%12,598,6222.04
2026-07-1534,410,087+7.0%15,576,6132.21
2026-06-3032,163,448+17.1%20,866,1501.54
2026-06-1527,460,161+15.2%18,120,0521.52
2026-05-2923,843,360-2.1%24,046,7551.00
2026-05-1524,361,815+13.4%31,515,2991.00
2026-04-3021,490,176+18.3%29,556,6741.00
2026-04-1518,164,865+14.9%3,881,4404.68
2026-03-3115,811,932+5.4%2,218,8627.13
2026-03-1314,997,436+22.5%3,234,9964.64
2026-02-2712,239,903+34.0%2,525,7744.85
2026-02-139,137,529+75.8%7,093,4071.29
2026-01-305,197,018+69.1%5,353,1191.00
2026-01-153,073,628-8.9%5,636,7331.00
2025-12-313,375,466-24.9%4,533,2151.00
2025-12-154,493,008+48.4%5,984,7841.00
2025-11-283,028,286+22.9%4,717,8011.00
2025-11-142,463,798+0.6%6,580,3521.00
2025-10-312,448,411+273.7%13,419,0671.00
2025-10-15655,226-54.3%17,740,7391.00

Daily short volume

FINRA Reg SHO, the last 30 sessions. JSON

As of 12 October 2026, the short share of SLNH volume is 56.2%, unchanged over the last five sessions. Over the last 30 readings it ranged from 21.6% (3 September 2026) to 61.7% (10 September 2026). The latest reading is 9.1 points above the 30-session average of 47.1%, on 6.8M shares reported.

DateShort volumeTotal volumeShort shareExempt
2026-10-123.8M6.8M56.2%1,196
2026-10-093.0M5.4M56.5%70,649
2026-10-085.1M8.6M59.3%0
2026-10-071.6M3.5M45.8%4,938
2026-10-062.4M4.1M59.2%6,526
2026-10-052.8M5.0M56.2%71,039
2026-10-022.2M4.0M56.0%8,438
2026-10-012.9M4.9M59.6%6,186
2026-09-301.1M2.0M52.3%0
2026-09-29704K1.8M38.7%142
2026-09-281.3M2.6M48.0%0
2026-09-251.1M2.9M38.8%0
2026-09-241.4M3.4M41.8%4
2026-09-232.1M4.2M49.4%0
2026-09-221.8M4.4M41.8%13,440
2026-09-212.3M5.3M42.8%29,613
2026-09-181.7M5.4M32.4%0
2026-09-171.2M3.5M35.0%1,286
2026-09-161.3M2.3M54.4%5,082
2026-09-151.3M2.8M47.9%8,371
2026-09-141.6M3.3M49.3%3,686
2026-09-111.6M3.5M44.2%8,828
2026-09-101.7M2.8M61.7%26,952
2026-09-091.7M3.4M51.9%789
2026-09-083.2M6.2M50.9%67,911
2026-09-041.1M2.7M39.3%1,590
2026-09-031.7M7.7M21.6%47,710
2026-09-021.3M3.3M38.3%0
2026-09-011.9M3.9M48.3%0
2026-08-311.5M4.1M36.3%200

Fails to deliver

SEC, the last 30 settlement dates with a fail. JSON

As of 11 September 2026, the fails-to-deliver balance in SLNH is 2,149 shares, up 234 shares over the last settlement date. Over the last 30 readings it ranged from 1,915 shares (10 September 2026) to 490,505 shares (17 August 2026). The latest reading sits at the bottom of that range.

SettlementShares failedPriceValue
2026-09-112,149$1.16$2K
2026-09-101,915$1.24$2K
2026-09-0939,356$1.27$50K
2026-09-083,013$1.20$4K
2026-09-04287,739$1.20$345K
2026-09-03112,979$1.08$122K
2026-09-02159,050$1.05$167K
2026-09-01239,907$1.08$259K
2026-08-3115,479$1.11$17K
2026-08-2620,896$1.23$26K
2026-08-25283,298$1.15$326K
2026-08-24416,623$1.18$492K
2026-08-21397,053$1.19$472K
2026-08-20168,338$1.20$202K
2026-08-1953,379$1.17$62K
2026-08-1861,545$1.33$82K
2026-08-17490,505$1.31$643K
2026-08-1497,084$1.30$126K
2026-08-133,376$1.35$5K
2026-08-12483,555$1.27$614K
2026-08-10244,487$1.17$286K
2026-08-0547,100$1.21$57K
2026-08-035,400$1.22$7K
2026-07-3110,514$1.30$14K
2026-07-30105,196$1.14$120K
2026-07-299,879$1.22$12K
2026-07-2838,780$1.23$48K
2026-07-2434,566$1.32$46K
2026-07-22155,288$1.37$213K
2026-07-2154,904$1.36$75K

Insider trades

SEC Form 4, newest first, 50 of 100 shown. JSON

Over the last 90 days SLNH insiders reported 4 open-market buys ($117K) against 2 sells ($51K), so the dollar flow leans toward buying. Latest filing: Thomas Jessica L. (Chief Accounting Officer) on 2026-09-23.

DateInsiderTitleTypeSharesPriceValueOwned after
2026-09-23Thomas Jessica L.Chief Accounting OfficerSell30K$1.26$38K1.5M
2026-09-03Phelan William PDirectorSell12K$1.12$13K2.3M
2026-09-01Thomas Jessica L.Chief Accounting OfficerTax withholding5K$1.05$6K1.5M
2026-09-01OReilly Mary JenniferChief People OfficerTax withholding16K$1.05$17K1.7M
2026-08-28PICCHI MICHAELChief Financial OfficerBuy20K$1.13$23K1.4M
2026-08-26Belizaire JohnChief Executive OfficerBuy50K$1.20$60K7.1M
2026-08-24PICCHI MICHAELChief Financial OfficerBuy10K$1.14$11K1.4M
2026-08-20PICCHI MICHAELChief Financial OfficerBuy20K$1.15$23K1.4M
2026-08-01Carver RyanChief Development OfficerGrant3.2M$0.00$03.2M
2026-06-15Thomas Jessica L.Chief Accounting OfficerSell5K$1.70$8K1.5M
2026-06-01TOPOREK MICHAELDirectorGrant7.3M$0.00$017.1M
2026-06-01Thomas Jessica L.Chief Accounting OfficerGrant726K$0.00$01.5M
2026-06-01Phelan William PDirectorGrant973K$0.00$02.3M
2026-06-01OReilly Mary JenniferChief People OfficerGrant726K$0.00$01.7M
2026-06-01Marusak Thomas JDirectorGrant850K$0.00$02.0M
2026-06-01MICHAELS DAVID CDirectorGrant850K$0.00$02.0M
2026-06-01Lipman Matthew E.DirectorGrant726K$0.00$01.7M
2026-06-01Hirshfield Edward RDirectorGrant726K$0.00$01.7M
2026-06-01Hazelip WilliamDirectorGrant726K$0.00$01.7M
2026-06-01Bottomley JohnDirectorSell1K$10.00$10K26K
2026-06-01Bottomley JohnDirectorGrant726K$0.00$01.7M
2026-06-01Belizaire JohnChief Executive OfficerTax withholding59K$1.67$99K7.0M
2026-06-01Belizaire JohnChief Executive OfficerGrant3.0M$0.00$07.1M
2026-05-21PICCHI MICHAELChief Financial OfficerBuy100K$1.63$163K1.4M
2026-04-06Belizaire JohnChief Executive OfficerSell1K$7.25$7K100K
2026-01-01Thomas Jessica L.Chief Accounting OfficerGrant460K$0.00$0795K
2025-12-16Phelan William PDirectorSell1K$1.41$2K1.3M
2025-12-12MICHAELS DAVID CChief Financial OfficerSell6K$9.26$52K53K
2025-12-12MICHAELS DAVID CChief Financial OfficerSell1K$2.19$2K1.2M
2025-12-01Thomas Jessica L.Chief Accounting OfficerGrant226K$0.00$0335K
2025-12-01Thomas Jessica L.Chief Accounting OfficerTax withholding3K$1.63$6K109K
2025-12-01Belizaire JohnChief Executive OfficerTax withholding21K$1.63$34K1.2M
2025-12-01Belizaire JohnChief Executive OfficerGrant2.9M$0.00$04.1M
2025-12-01TOPOREK MICHAELDirectorGrant6.9M$0.00$09.8M
2025-12-01Thomas Jessica L.Chief Accounting OfficerGrant226K$0.00$0339K
2025-12-01Phelan William PDirectorGrant918K$0.00$01.3M
2025-12-01OReilly Mary JenniferChief People OfficerGrant685K$0.00$0977K
2025-12-01Marusak Thomas JDirectorGrant801K$0.00$01.1M
2025-12-01MICHAELS DAVID CChief Financial OfficerGrant801K$0.00$01.2M
2025-12-01Lipman Matthew E.DirectorGrant685K$0.00$0977K
2025-12-01Hirshfield Edward RDirectorGrant685K$0.00$0976K
2025-12-01Hazelip WilliamDirectorGrant685K$0.00$0976K
2025-12-01Budzyn Agnieszka TeresaDirectorGrant350K$0.00$0485K
2025-12-01Bottomley JohnDirectorGrant685K$0.00$0977K
2025-12-01Belizaire JohnChief Executive OfficerGrant2.9M$0.00$04.1M
2025-11-21Belizaire JohnChief Executive OfficerSell5K$1.44$7K1.2M
2025-11-21Belizaire JohnChief Executive OfficerSell4K$1.45$6K1.2M
2025-10-15Budzyn Agnieszka TeresaDirectorGrant135K$0.00$0135K
2025-09-01TOPOREK MICHAELDirectorGrant1.0M$0.00$02.9M
2025-09-01Thomas Jessica L.Chief Accounting OfficerGrant33K$0.00$0113K

Form 4 filings are due within two business days of the trade. Insiders sell for many reasons that say nothing about the company; open-market buys are rarer.

Planned sales (Form 144)

Newest first. JSON

10 Form 144 notices on file for SLNH worth $942K at the prices reported; 3 in the last 90 days worth $564K. Latest: Phelan William P filed on 2026-09-03 to sell 12,037 shares ($13K) from 2026-09-03.

FiledSellerSharesMarket valueOf outstandingSale fromBroker
2026-09-03Phelan William PDirector12K$13K0.005%2026-09-03Fidelity Brokerge Services LLC
2026-09-01Belizaire JohnOfficer1K$12K0.001%2026-09-01Fidelity Brokerage Services LLC
2026-08-19Phelan William PDirector43K$539K0.018%2026-08-19Charles Schwab Corp.
2026-06-17Phelan William PDirector18K$193K0.366%2026-06-17Charles Schwab Corp
2026-06-01Belizaire JohnOfficer1K$10K0.001%2026-06-01Fidelity Brokerage Services LLC
2026-04-06Belizaire JohnOfficer1K$7K0.001%2026-04-06Fidelity Brokerage Services LLC
2025-12-16Phelan William PDirector1K$2K0.002%2025-12-16FIDELITY BROKERAGE SERVICES LLC
2025-12-11MICHAELS DAVID COfficer, Director6K$56K0.115%2025-12-11Merrill Lynch
2025-11-21Belizaire JohnOfficer9K$14K0.013%2025-11-21Fidelity Brokerage Services LLC
2025-11-19Phelan William PDirector11K$96K0.230%2025-11-19Charles Schwab Corp.

Large holders (13D and 13G)

One row per reporting person with its latest filing, newest first. JSON

6 holders report 5% or more of SLNH in their latest filing, all on Schedule 13G (passive). The largest reported stake is Generate Strategic Credit Master Fund I-B, L.P. at 10.0% of the class (3,345,829 shares), filed 2025-09-18 for an event on 2025-09-12.

FiledFormHolderSharesOf classEvent
2026-08-0513GBUGBEE ROBERT Lindividual15.4M9.8%2026-08-05
2026-07-3013GBlackRock, Inc.parent holding company8.3M5.3%2026-06-30
2025-11-1213G/Ano. 1Alpha Capital Anstaltcorporation1.0M1.5%2025-09-30
2025-11-0713G/Ano. 1Mitchell P. Kopinparent holding company, individual00.0%2025-09-30
2025-11-0713G/Ano. 1Daniel B. Asherparent holding company, individual00.0%2025-09-30
2025-11-0713G/Ano. 1Intracoastal Capital LLCother entity00.0%2025-09-30
2025-09-1813GGenerate Strategic Credit Master Fund I-B, L.P.partnership3.3M10.0%2025-09-12
2025-09-1813GGenerate Strategic Credit Fund GP, L.P.partnership3.3M10.0%2025-09-12
2025-09-1813GGCP Holdings I, LLCother entity3.3M10.0%2025-09-12
2025-09-1813GGenerate Capital, PBCcorporation3.3M10.0%2025-09-12

13F holders

Tracked managers holding SLNH at their latest 13F. JSON

2 of the 30 tracked managers held SLNH at their latest 13F, $909K in total at quarter-end prices. Renaissance Technologies is the largest at $611K (0.0% of its portfolio) as of 2026-06-30. Over the prior quarter 1 added shares and 1 cut.

FundQuarterSharesValueOf portfolioChange in shares
Renaissance Technologies2026-06-30453K$611K0.00%-383K
Millennium Management2026-06-30221K$298K0.00%new

Only the 30 tracked managers on the funds hub; a 13F reports long positions in US listed stock at quarter end, 45 days late, and says nothing about shorts or positions sold since.

Financials

SEC XBRL, as filed. JSON

In Q2 FY 2026 (quarter ended 2026-06-30) Soluna Holdings reported revenue of $15.1M, up 144.6% from the same quarter a year earlier, and net loss of $20.7M (-0.18 diluted EPS). In FY 2025 it generated -$9.1M of operating cash flow and spent $75K on buybacks.

Debt
$3.0M
Equity
$155.9M
Total assets
$293.5M
Shares outstanding
244,590,575

Quarterly, last 8 quarters

QuarterPeriod endRevenueNet incomeMarginDiluted EPS
Q2 FY 20262026-06-30$15.1M-$20.7M-137.5%-0.18
Q1 FY 20262026-03-31$9.4M-$17.5M-185.9%-0.24
Q4 FY 2025derived2025-12-31$9.2M-$14.5M-157.7%n/a
Q3 FY 20252025-09-30$8.4M-$24.0M-284.7%-1.14
Q2 FY 20252025-06-30$6.2M-$7.4M-119.9%-0.93
Q1 FY 20252025-03-31$5.9M-$7.6M-127.3%-1.21
Q4 FY 2024derived2024-12-31$8.3M-$40.0M-483.8%n/a
Q3 FY 20242024-09-30$7.5M-$7.2M-95.5%-1.56

Fiscal years, with buybacks and dividends

Fiscal yearEndsRevenueNet incomeOperating cash flowCapexBuybacksDividends
FY 20252025-12-31$29.7M-$53.4M-$9.1M$28.1M$75Kn/a
FY 20242024-12-31$38.0M-$63.3M-$5.1M$8.9M$0n/a
FY 20232023-12-31$21.1M-$29.2M-$3.0M$12.7Mn/an/a
FY 20222022-12-31$28.5M-$98.7M-$6.1M$63.7Mn/an/a
FY 20212021-12-31$14.3M-$5.3M$4.6M$45.8Mn/a$630K

Quarters are the three-month figures the company reports; a fourth quarter marked derived is the fiscal year less the three reported quarters, since companies report it only inside the 10-K. Fiscal years are the annual figures. Buybacks are the cash the company paid to repurchase its common stock in the year, not the amount authorized. Balance sheet lines are as of 2026-06-30; shares outstanding as of 2026-08-10 from the cover page.

What this page is

Soluna Holdings in the regulatory record

Regulators publish company data in separate files that never sit next to each other: FINRA's twice-monthly short interest, its daily short sale volume, the SEC's fails-to-deliver counts, and each insider's Form 4. A company page puts those series for one ticker on one URL, with planned sales, large holders, 13F holders and financials beside them, so the short position, the daily flow, the settlement fails and what insiders are doing can be read together.

Each section has its own history table, a one-line summary of the latest figures and its own JSON and CSV links, and says when its source last updated.

This page follows Soluna Holdings (SLNH), SEC CIK 64463, listed on Nasdaq, classified by the SEC as finance services. The cross-market tables live on the short interest and insider transactions hubs.

Source and updates

Short interest
FINRA consolidated short interestSource: FINRA.Twice a month, about eight business days after settlement. Latest 2026-09-30.JSON and CSV
Daily short volume
FINRA Reg SHO daily filesSource: FINRA.Every trading day, the morning after FINRA posts it. Latest 2026-10-12.JSON and CSV
Fails to deliver
SEC fails-to-deliver dataSource: SEC.Twice a month, a few weeks after the half month ends. Latest 2026-09-11.JSON and CSV
Planned sales
SEC EDGAR Form 144Source: SEC.New notices appear shortly after the SEC posts them; a notice is filed on or before the sale. Latest 2026-09-03.JSON and CSV
Large holders
SEC EDGAR Schedule 13D and 13GSource: SEC.New filings appear shortly after the SEC posts them. A 13D is due within five business days of crossing 5%; a 13G follows the passive schedule. Latest 2026-08-05.JSON and CSV
13F holders
SEC EDGAR Form 13F-HRSource: SEC.Quarterly, filed within 45 days of quarter end; 30 tracked managers. Latest 2026-06-30.JSON and CSV
Financials
SEC EDGAR 10-K and 10-Q filingsSource: SEC.Weekly; values are as filed in the 10-Q and 10-K. Latest 2026-06-30.JSON and CSV
Earnings dates
SEC EDGAR 8-K filings (Item 2.02)Source: SEC.Twice a day. Reported dates come from the company's 8-K filings; the next date is marked as an estimate until the 8-K arrives. Latest 2026-08-13.JSON and CSV
Insider trades
SEC EDGAR Form 4Source: SEC.New filings appear shortly after the SEC posts them; they're due two business days after the trade. Latest 2026-09-23.JSON and CSV
Company record
EDGAR filing index for CIK 64463Ticker, name and exchange from the SEC's company list, refreshed weekly.
Rate limits
10 requests a minute without a key, 30 with a free key from a free account.

How to read it

  • Read the position against the flow: rising short interest with a high daily short share is new shorting; rising short interest with a normal short share is old shorts holding on.
  • Insider buys next to a large short position are rare and stand out; insider sells next to one are common and mean little.
  • Fails to deliver matter relative to the float, not in absolute shares; a million failed shares in a mega cap is noise.

Analysis of what the data shows, not advice. XOOMAR does not recommend buying, selling or holding anything.

Datasets

Frequently Asked Questions

How much of SLNH is sold short?
25,077,385 shares were held short at the 2026-09-30 settlement, 3.8 days of average volume. FINRA publishes the next count about eight business days after the 15th and the last business day of the month.
What is SLNH's daily short volume?
On 2026-10-12, 3,848,975 of the 6,847,111 SLNH shares reported to FINRA were sold short, 56.2% of the day's reported volume. Short volume is a flow for one day, not a position.
Does SLNH have fails to deliver?
The SEC's latest file shows 2,149 SLNH shares failed to deliver at settlement 2026-09-11. Fails are reported per settlement date and published twice a month with a lag.
Are SLNH insiders buying or selling?
Over the last 90 days SLNH insiders reported 4 open-market buys ($117K) against 2 sells ($51K), so the dollar flow leans toward buying. Latest filing: Thomas Jessica L. (Chief Accounting Officer) on 2026-09-23.
Have SLNH insiders filed to sell?
10 Form 144 notices on file for SLNH worth $942K at the prices reported; 3 in the last 90 days worth $564K. Latest: Phelan William P filed on 2026-09-03 to sell 12,037 shares ($13K) from 2026-09-03.
Who owns 5% or more of SLNH?
6 holders report 5% or more of SLNH in their latest filing, all on Schedule 13G (passive). The largest reported stake is Generate Strategic Credit Master Fund I-B, L.P. at 10.0% of the class (3,345,829 shares), filed 2025-09-18 for an event on 2025-09-12.
What did SLNH report last quarter?
In Q2 FY 2026 (quarter ended 2026-06-30) Soluna Holdings reported revenue of $15.1M, up 144.6% from the same quarter a year earlier, and net loss of $20.7M (-0.18 diluted EPS). In FY 2025 it generated -$9.1M of operating cash flow and spent $75K on buybacks.
Which tracked 13F managers own SLNH?
2 of the 30 tracked 13F managers held SLNH shares at their latest filing, $909K in all. The largest: Renaissance Technologies (453K shares, $611K), Izzy Englander's Millennium Management (221K shares, $298K).

Data on this page is provided for informational purposes only and is not financial advice. See our editorial policy.