CleanSpark, Inc.
CleanSpark, Inc. (CLSK) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · CLSK · as of Sep 30, 2025
Ownership Breakdown
385
Institutional Holders
▲ 25 vs Q2
$3.18B
Total Inst. Value
▲ $1.29B vs Q2
256.61M
Shares Outstanding
freeFloat 96.00%
191.19M
13F Shares Held
▲ 19.32M vs Q2
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
CLSK largest shareholders · institutional ownership
Q3 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
BLACKROCK, INC. services-computer integrated systems design | 44.44M | 15.81% | 15.81% | $644.35B | Nov 12, 2025 | ▲ 148.9K |
VANGUARD GROUP INC services-computer integrated systems design | 26.05M | 9.27% | 9.27% | $377.75B | Nov 7, 2025 | ▲ 769.1K |
SUSQUEHANNA INTERNATIONAL GROUP, LLP services-computer integrated systems design | 12.93M | 4.60% | 4.60% | $187.46B | Nov 14, 2025 | ▲ 1.34M |
STATE STREET CORP services-computer integrated systems design | 11.02M | 3.92% | 3.92% | $159.75B | Nov 14, 2025 | ▼ 60.7K |
SUSQUEHANNA INTERNATIONAL GROUP, LLP services-computer integrated systems design | 8.25M | 2.94% | 2.94% | $119.61B | Nov 14, 2025 | ▲ 1.70M |
GEODE CAPITAL MANAGEMENT, LLC services-computer integrated systems design | 7.49M | 2.67% | 2.67% | $108.61B | Nov 12, 2025 | ▼ 47.6K |
CITADEL ADVISORS LLC services-computer integrated systems design | 7.40M | 2.63% | 2.63% | $107.25B | Nov 14, 2025 | ▲ 2.12M |
MORGAN STANLEY services-computer integrated systems design | 6.33M | 2.25% | 2.25% | $91.77B | May 27, 2026 | ▼ 4.18M |
WOLVERINE ASSET MANAGEMENT LLC services-computer integrated systems design | 5.58M | 1.99% | 1.99% | $80.90B | Oct 28, 2025 | ▲ 90.1K |
INVESCO LTD. services-computer integrated systems design | 4.48M | 1.60% | 1.60% | $65.00B | Nov 13, 2025 | ▲ 810.2K |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q3 2025 vs prior quarter
Q3 2025
24
Increased
+19.12M shares8
New Positions
first time holders17
Decreased
−13.04M shares0
Sold Out
fully exitedNet shares change (top 50)
+6.08M
+19.12M / −13.04M
Net new holders
+15
8 new / 0 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
CLSK insider trading · insider activity
Source: SEC Form 4
4
Buy transactions
8
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 |
|---|---|---|---|---|---|---|---|
Monnig Taylor CTO, COO | May 14, 2026 | Tax Withhold | 211 | $13.98 | $2.9K | 168.9K | Form 4 ↗ |
Garrison Scott Eugene EVP, Chief Development Officer | May 14, 2026 | Tax Withhold | 1,192 | $13.98 | $16.7K | 200.9K | Form 4 ↗ |
Vecchiarelli Gary Anthony President, CFO | May 14, 2026 | Tax Withhold | 632 | $13.98 | $8.8K | 63.1K | Form 4 ↗ |
Schultz S. Matthew CEO & Chairman | May 14, 2026 | Tax Withhold | 9,031 | $13.98 | $126.3K | 2.47M | Form 4 ↗ |
Cavaleri Amanda director | Mar 9, 2026 | Award | 31,220 | — | — | 31.2K | Form 4 ↗ |
Beynon Roger Paul director | Mar 9, 2026 | Award | 31,220 | — | — | 31.2K | Form 4 ↗ |
Wood Thomas Leigh director | Mar 9, 2026 | Award | 31,220 | — | — | 31.2K | 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
CleanSpark, Inc. (CLSK) is primarily owned by institutional investors, who hold approximately 74.5% of total shares outstanding. Company insiders own approximately 4.00%, while retail and public investors account for the remaining 21.49%.
The largest institutional shareholder of CleanSpark, Inc. is BLACKROCK, INC., holding approximately 44.44 million shares — equal to 15.81% of outstanding shares — as of September 30, 2025.
A total of 385 institutional investors currently hold CLSK stock, with a combined institutional value of approximately $3.18 billion as of the most recent 13F filing period.
Frequently asked questions
CLSK ownershipCleanSpark, Inc. (CLSK) is primarily owned by institutional investors, who hold approximately 74.5% of shares. The largest shareholder is BLACKROCK, INC. with a 15.81% stake. Company insiders hold 4.00%. Data sourced from SEC Form 13F as of September 30, 2025.