Soluna Holdings, Inc.
Soluna Holdings, Inc. (SLNH) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · SLNH · as of Mar 31, 2025
Ownership Breakdown
19
Institutional Holders
▼ 5 vs Q4
$405,181
Total Inst. Value
▼ $428,520 vs Q4
157.75M
Shares Outstanding
freeFloat 65.14%
634,839
13F Shares Held
▲ 237,885 vs Q4
Institutional ownership = 13F shares ÷ total outstanding. Insider % = 100 − free float. Public % = free float − institution %. Data: FMP /symbol-positions-summary + /shares-float + SEC EDGAR.
Top Institutional Holders
SLNH largest shareholders · institutional ownership
Q1 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
UBS GROUP AG services-computer processing & data preparation | 357.0K | 2.99% | 2.99% | $227.78M | May 13, 2025 | ▲ 356.6K |
GEODE CAPITAL MANAGEMENT, LLC services-computer processing & data preparation | 97.8K | 81.93% | 81.93% | $62.41M | May 13, 2025 | ▲ 51.5K |
VANGUARD GROUP INC services-computer processing & data preparation | 40.8K | 34.14% | 34.14% | $26.00M | May 9, 2025 | — held |
SBI SECURITIES CO., LTD. services-computer processing & data preparation | 29.6K | 24.79% | 24.79% | $18.88M | May 2, 2025 | ▼ 9.6K |
ARCADIA WEALTH MANAGEMENT, INC. services-computer processing & data preparation | 19.8K | 16.58% | 16.58% | $12.63M | May 12, 2025 | — held |
XTX TOPCO LTD services-computer processing & data preparation | 19.5K | 16.33% | 16.33% | $12.44M | May 8, 2025 | NEW |
COASTAL BRIDGE ADVISORS, LLC services-computer processing & data preparation | 15.0K | 12.56% | 12.56% | $9.57M | Aug 25, 2025 | ▲ 15.0K |
TWO SIGMA SECURITIES, LLC services-computer processing & data preparation | 13.5K | 11.32% | 11.32% | $8.62M | May 15, 2025 | NEW |
VIRTU FINANCIAL LLC services-computer processing & data preparation | 13.0K | 10.89% | 10.89% | $8.00M | May 12, 2025 | ▲ 13.0K |
STATE STREET CORP services-computer processing & data preparation | 11.6K | 9.71% | 9.71% | $7.40M | May 15, 2025 | — held |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q1 2025 vs prior quarter
Q1 2025
5
Increased
+436.2K shares4
New Positions
first time holders2
Decreased
−9.6K shares10
Sold Out
fully exitedNet shares change (top 50)
+426.5K
+436.2K / −9.6K
Net new holders
-3
4 new / 10 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
SLNH insider trading · insider activity
Source: SEC Form 4
Insiders have been primarily selling shares recently. Selling may be driven by pre-scheduled Rule 10b5-1 plans rather than negative sentiment.
1
Buy transactions
2
Sell transactions
0.50
Buy/Sell ratio
$0M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
Belizaire John Chief Executive Officer | Jun 1, 2026 | Sale | 1,000 | $10.40 | $10.4K | 99.0K | Form 4 ↗ |
PICCHI MICHAEL Chief Financial Officer | May 21, 2026 | Purchase | 100,000 | $1.63 | $163.2K | 1.38M | Form 4 ↗ |
Belizaire John Chief Executive Officer | Apr 6, 2026 | Sale | 1,000 | $7.25 | $7.3K | 100.0K | Form 4 ↗ |
Thomas Jessica L. Chief Accounting Officer | Jan 1, 2026 | Award | 460,000 | — | — | 795.2K | Form 4 ↗ |
Phelan William P director | Dec 16, 2025 | Sale | 1,300 | $1.41 | $1.8K | 1.32M | Form 4 ↗ |
MICHAELS DAVID C Chief Financial Officer | Dec 12, 2025 | Sale | 1,017 | $2.19 | $2.2K | 1.18M | Form 4 ↗ |
MICHAELS DAVID C Chief Financial Officer | Dec 12, 2025 | Sale | 5,669 | $9.26 | $52.5K | 53.0K | Form 4 ↗ |
Hirshfield Edward R director | Dec 10, 2025 | Sale | 2,000 | $9.70 | $19.4K | 11.7K | Form 4 ↗ |
Hirshfield Edward R director | Dec 11, 2025 | Sale | 741 | $9.90 | $7.3K | 11.0K | Form 4 ↗ |
Hirshfield Edward R director | Dec 12, 2025 | Sale | 2,000 | $9.76 | $19.5K | 9.0K | Form 4 ↗ |
Source: /insider-trading/search (FMP stable). Buy/Sell direction: acquisitionOrDisposition A=Buy, D=Sell. RSU vesting (M-Exempt) excluded from sentiment bar. All data from SEC EDGAR public filings.
About institutional & insider ownership
Soluna Holdings, Inc. (SLNH) is primarily owned by institutional investors, who hold approximately 0.4% of total shares outstanding. Company insiders own approximately 34.86%, while retail and public investors account for the remaining 64.74%.
The largest institutional shareholder of Soluna Holdings, Inc. is UBS GROUP AG, holding approximately 357,019 shares — equal to 2.99% of outstanding shares — as of March 31, 2025.
A total of 19 institutional investors currently hold SLNH stock, with a combined institutional value of approximately $405,181 as of the most recent 13F filing period.
Frequently asked questions
SLNH ownershipSoluna Holdings, Inc. (SLNH) is primarily owned by institutional investors, who hold approximately 0.4% of shares. The largest shareholder is UBS GROUP AG with a 2.99% stake. Company insiders hold 34.86%. Data sourced from SEC Form 13F as of March 31, 2025.