CleanSpark, Inc. (CLSK) Ownership
CLSK ownership summary
as of October 17, 2026- Institutions
- 100.8% of shares outstanding
- Insiders
- 4.01% of shares outstanding
- Shares outstanding
- 256.8M
- Float
- 246.5M shares available to trade
- Short interest
- 41.56% 76.3M shares short
- Days to cover
- 4.59 short interest down 2.9% vs prior month
- Institutions 100.79%
- Insiders 4.01%
CLSK top institutional holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | BlackRock Inc | 16.48% | 42.3M | $355.6M | +590,142 (+1.4%) | June 30, 2026 |
| 2 | Situational Awareness LP | 4.78% | 12.3M | $103.1M | — | June 30, 2026 |
| 3 | Situational Awareness Partners LP | 4.78% | 12.3M | $103.1M | +12.3M (0.0%) | March 31, 2026 |
| 4 | Vanguard Portfolio Management, LLC | 4.46% | 11.5M | $96.3M | +366,663 (+3.3%) | June 30, 2026 |
| 5 | D. E. Shaw & Co LP | 4.38% | 11.3M | $94.6M | +4.8M (+75.0%) | June 30, 2026 |
| 6 | Vanguard Capital Management, LLC | 4.33% | 11.1M | $93.4M | +50,474 (+0.5%) | June 30, 2026 |
| 7 | State Street Corp | 4.28% | 11.0M | $92.4M | +6,092 (+0.1%) | June 30, 2026 |
| 8 | Dimensional Fund Advisors, Inc. | 3.76% | 9.6M | $81.0M | −4.5M (−31.6%) | June 30, 2026 |
| 9 | UBS Group AG | 2.94% | 7.6M | $63.5M | +4.2M (+127.9%) | June 30, 2026 |
| 10 | Geode Capital Management, LLC | 2.83% | 7.3M | $61.0M | +119,147 (+1.7%) | June 30, 2026 |
| 11 | Point72 Asset Management, L.P. | 2.33% | 6.0M | $50.2M | +4.4M (+272.5%) | June 30, 2026 |
| 12 | Amvescap Plc. | 1.40% | 3.6M | $30.3M | −1.4M (−27.6%) | June 30, 2026 |
| 13 | Nuveen, LLC | 1.36% | 3.5M | $29.3M | +392,883 (+12.7%) | June 30, 2026 |
| 14 | Charles Schwab Investment Management Inc | 1.34% | 3.4M | $28.8M | +15,385 (+0.5%) | June 30, 2026 |
| 15 | Jane Street Group LLC | 1.32% | 3.4M | $28.4M | +2.1M (+160.1%) | June 30, 2026 |
| 16 | The Goldman Sachs Group Inc | 1.25% | 3.2M | $26.9M | +172,257 (+5.7%) | June 30, 2026 |
| 17 | Morgan Stanley - Brokerage Accounts | 1.19% | 3.1M | $25.7M | −3.7M (−54.7%) | June 30, 2026 |
| 18 | Northern Trust Corp | 1.13% | 2.9M | $24.4M | +143,164 (+5.2%) | June 30, 2026 |
| 19 | Van Eck Associates Corporation | 1.13% | 2.9M | $24.3M | −40,914 (−1.4%) | June 30, 2026 |
| 20 | Millennium Management LLC | 1.01% | 2.6M | $21.7M | +2.3M (+685.2%) | June 30, 2026 |
Value at the latest close. Change = shares bought or sold in the latest quarterly filing (13F). In the top 20, 15 holders added 31.9M shares and 4 cut 9.6M.
CLSK top mutual fund and ETF holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | iShares Core S&P Small-Cap ETF | 5.95% | 15.3M | $128.5M | +3,462 (+0.0%) | September 30, 2026 |
| 2 | Vanguard MStar Total Stk Mkt Idx Invest | 3.02% | 7.7M | $65.1M | −9,000 (−0.1%) | August 31, 2026 |
| 3 | iShares Russell 2000 ETF | 2.56% | 6.6M | $55.3M | −75,840 (−1.1%) | September 30, 2026 |
| 4 | Vanguard Information Technology ETF | 2.53% | 6.5M | $54.6M | −9,907 (−0.2%) | August 31, 2026 |
| 5 | Fidelity Small Cap Index | 1.08% | 2.8M | $23.3M | +23,153 (+0.8%) | July 31, 2026 |
| 6 | iShares Russell 2000 Value ETF | 0.92% | 2.4M | $19.9M | +3,600 (+0.2%) | September 30, 2026 |
| 7 | State Street SPDR Port S&P 600 Sm CpETF | 0.91% | 2.3M | $19.6M | — | September 30, 2026 |
| 8 | VanEck Crypto&Blckchan Innovtr ETF A USD | 0.81% | 2.1M | $17.5M | −2,451 (−0.1%) | September 30, 2026 |
| 9 | Amplify Blockchain Technology ETF | 0.80% | 2.1M | $17.3M | — | September 30, 2026 |
| 10 | Vanguard Tax-Managed Small Cap Adm | 0.72% | 1.9M | $15.6M | — | August 31, 2026 |
| 11 | Avantis US Small Cap Value ETF | 0.66% | 1.7M | $14.2M | — | September 30, 2026 |
| 12 | Bitwise Crypto Industry Innovators ETF | 0.63% | 1.6M | $13.5M | — | September 30, 2026 |
| 13 | Invesco CoinShares Global Blockchain ETF | 0.60% | 1.6M | $13.0M | — | September 30, 2026 |
| 14 | VanEck Digital Trfmt ETF | 0.60% | 1.5M | $13.0M | — | September 30, 2026 |
| 15 | American Century Small Cap Growth Inv | 0.60% | 1.5M | $12.9M | +1.5M (0.0%) | June 30, 2026 |
| 16 | Vanguard Russell 2000 ETF | 0.57% | 1.5M | $12.2M | +34,605 (+2.4%) | August 31, 2026 |
| 17 | CREF Total Global Stock Account R3 | 0.54% | 1.4M | $11.6M | −314,663 (−18.6%) | July 31, 2026 |
| 18 | iShares S&P Small-Cap 600 Growth ETF | 0.54% | 1.4M | $11.6M | — | September 30, 2026 |
| 19 | Schwab US Small-Cap ETF™ | 0.53% | 1.4M | $11.4M | +909 (+0.1%) | September 30, 2026 |
| 20 | Fidelity Extended Market Index | 0.50% | 1.3M | $10.7M | +6,360 (+0.5%) | August 31, 2026 |
Funds report holdings monthly or quarterly; dates differ by fund.
CLSK insider transactions
latest 4| Date | Name | Transaction | Price | Shares | Value |
|---|---|---|---|---|---|
| 2025-12-23 | Thomas Leigh Wood | Sell | $11.69 | 85,315 | $997,332 |
| 2025-12-04 | Amanda Cavaleri | Sell | $15.02 | 33,000 | $495,660 |
| 2025-09-09 | Taylor Monnig | Sell | $9.12 | 63,713 | $581,063 |
| 2025-05-21 | Roger Paul Beynon | Sell | $10.51 | 50,000 | $525,500 |
Reported trades by company officers, directors and other filers (including disclosures by members of Congress where EODHD lists them). "—" where the filing gives no share count.
CLSK shares outstanding
Year-end shares outstanding, adjusted for splits.
Who owns CLSK
Institutional investors own 100.8% of CleanSpark's shares and insiders 4.01%. The largest holder is BlackRock Inc with 16.48% of the shares (42.3M), as of June 30, 2026. Among the top 20 institutions, 15 added shares and 4 reduced their stake in the latest filings. Short interest is 41.56% of the float, or 4.59 days of average trading volume. The share count rose 16,055.0% since 2014.
Related: CLSK analyst forecast, CLSK key metrics. See the CLSK stock overview for the latest quote and news.
CLSK ownership FAQ
Who owns the most CleanSpark stock?
The largest shareholders of CleanSpark are BlackRock Inc (16.48%), Situational Awareness LP (4.78%), Situational Awareness Partners LP (4.78%), Vanguard Portfolio Management, LLC (4.46%), D. E. Shaw & Co LP (4.38%).
What percentage of CleanSpark is owned by institutions?
Institutions hold 100.8% of CleanSpark's shares outstanding; insiders hold 4.01%.
Which funds own CleanSpark?
The largest fund holders of CleanSpark are iShares Core S&P Small-Cap ETF (5.95%), Vanguard MStar Total Stk Mkt Idx Invest (3.02%), iShares Russell 2000 ETF (2.56%), Vanguard Information Technology ETF (2.53%), Fidelity Small Cap Index (1.08%).
What is CleanSpark's short interest?
76.3M shares of CleanSpark were sold short, 41.56% of the float; at the average daily volume it would take 4.59 days to cover.
Are insiders buying or selling CleanSpark?
Of the latest 4 reported insider transactions in CleanSpark (since May 21, 2025), 0 were purchases and 4 were sales.
How many shares of CleanSpark are outstanding?
CleanSpark has 256.8M shares outstanding, of which 246.5M are in the public float.