Oklo Inc.
Oklo Inc. (OKLO) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · OKLO · as of Sep 30, 2025
Ownership Breakdown
720
Institutional Holders
▲ 199 vs Q2
$7.24B
Total Inst. Value
▲ $4.20B vs Q2
173.99M
Shares Outstanding
freeFloat 92.97%
64.87M
13F Shares Held
▲ 10.73M 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
OKLO largest shareholders · institutional ownership
Q3 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
VANGUARD GROUP INC electric services | 11.59M | 8.28% | 8.28% | $1.29T | Nov 7, 2025 | ▲ 2.90M |
BLACKROCK, INC. electric services | 8.62M | 6.15% | 6.15% | $961.76B | Nov 12, 2025 | ▲ 1.30M |
MIRAE ASSET GLOBAL ETFS HOLDINGS LTD. electric services | 7.10M | 5.07% | 5.07% | $792.82B | Nov 14, 2025 | ▲ 2.97M |
SUSQUEHANNA INTERNATIONAL GROUP, LLP electric services | 5.27M | 3.76% | 3.76% | $588.03B | Nov 14, 2025 | ▲ 2.33M |
JANE STREET GROUP, LLC electric services | 5.25M | 3.75% | 3.75% | $585.88B | Nov 14, 2025 | ▲ 3.85M |
CITADEL ADVISORS LLC electric services | 4.78M | 3.41% | 3.41% | $533.86B | Nov 14, 2025 | ▲ 2.95M |
CITADEL ADVISORS LLC electric services | 4.61M | 3.29% | 3.29% | $514.47B | Nov 14, 2025 | ▲ 187.7K |
JANE STREET GROUP, LLC electric services | 4.04M | 2.88% | 2.88% | $450.56B | Nov 14, 2025 | ▲ 2.55M |
SUSQUEHANNA INTERNATIONAL GROUP, LLP electric services | 3.81M | 2.72% | 2.72% | $425.33B | Nov 14, 2025 | ▲ 1.17M |
VAN ECK ASSOCIATES CORP electric services | 3.47M | 2.48% | 2.48% | $387.91B | Nov 13, 2025 | ▲ 1.32M |
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
32
Increased
+28.52M shares8
New Positions
first time holders9
Decreased
−2.11M shares0
Sold Out
fully exitedNet shares change (top 50)
+26.41M
+28.52M / −2.11M
Net new holders
+31
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
OKLO 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.
12
Buy transactions
63
Sell transactions
0.19
Buy/Sell ratio
$2M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
Bealmear Richard Craig Chief Financial Officer | Jun 1, 2026 | Sale | 10,000 | $69.31 | $693.1K | 487.6K | Form 4 ↗ |
Bealmear Richard Craig Chief Financial Officer | Jun 1, 2026 | Gift | 2,100 | — | — | 485.5K | Form 4 ↗ |
Bealmear Richard Craig Chief Financial Officer | Jun 1, 2026 | Sale | 46,843 | $69.42 | $3.25M | 438.7K | Form 4 ↗ |
Bealmear Richard Craig Chief Financial Officer | Jun 1, 2026 | Sale | 16,238 | $65.00 | $1.06M | 397.6K | Form 4 ↗ |
DeWitte Jacob Co-Founder, CEO | Jun 1, 2026 | Sale | 40,000 | $69.10 | $2.76M | 609.5K | Form 4 ↗ |
DeWitte Jacob Co-Founder, CEO | Jun 1, 2026 | Sale | 12,600 | $64.99 | $818.9K | 585.4K | Form 4 ↗ |
DeWitte Jacob Co-Founder, CEO | Jun 1, 2026 | Sale | 38,200 | $69.64 | $2.66M | 578.3K | Form 4 ↗ |
DeWitte Jacob Co-Founder, CEO | Jun 1, 2026 | Sale | 7,400 | $66.14 | $489.4K | 578.0K | Form 4 ↗ |
DeWitte Jacob Co-Founder, CEO | Jun 1, 2026 | Sale | 1,800 | $70.45 | $126.8K | 576.5K | Form 4 ↗ |
DeWitte Jacob Co-Founder, CEO | Jun 1, 2026 | Sale | 60,000 | $68.29 | $4.10M | 571.5K | 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
Oklo Inc. (OKLO) is primarily owned by institutional investors, who hold approximately 37.3% of total shares outstanding. Company insiders own approximately 7.03%, while retail and public investors account for the remaining 55.69%.
The largest institutional shareholder of Oklo Inc. is VANGUARD GROUP INC, holding approximately 11.59 million shares — equal to 8.28% of outstanding shares — as of September 30, 2025.
A total of 720 institutional investors currently hold OKLO stock, with a combined institutional value of approximately $7.24 billion as of the most recent 13F filing period.
Frequently asked questions
OKLO ownershipOklo Inc. (OKLO) is primarily owned by institutional investors, who hold approximately 37.3% of shares. The largest shareholder is VANGUARD GROUP INC with a 8.28% stake. Company insiders hold 7.03%. Data sourced from SEC Form 13F as of September 30, 2025.