Latest Period
Q1 2026
Security Snapshot
Oklo Inc. - Class A Stock (OKLO) Institutional Ownership
CUSIP: 02156V109
13F Institutional Holders and Ownership History from Q3 2021 to Q2 2026
Institutions Reporting
673
Shares (Excl. Options)
89,251,230
Price
$49.59
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- Security type / class
- Equity / Class A Stock
- Symbol
- OKLO on NYSE
- All holders as of 31 Mar 2026
- Q1 2026
- Total 13F shares
- 89,251,230
- Total 13F value
- $4,429,707,147
- Portfolio coverage rank
- 0.01%
- Share change
- +12,785,601
- Value change
- +$573,892,791
- Number of holders
- 673
- Shares outstanding
- 172,932,917
- SEC-reported price per share
- $45.81
- Insider filing price
- $45.81
Latest holder snapshot
5 signals
Issuer context
Names, identifiers, and filing context for this profile.
3 identity fields
13F Shares, Excluding Options vs Price
13F Value, Excluding Options
Total Investors
Key facts
- OKLO - Oklo Inc. - Class A Stock is tracked under CUSIP 02156V109.
- 673 institutions reported positions in Q1 2026.
- 5 significant owners is listed from Schedule 13D/13G reporting.
Change
- Holder count moved from 673 to 309 between Q1 2026 and Q2 2026.
- SEC-reported value moved from $4,429,707,147 to $273,314,464.
Research use
- You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
- 13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.
Evidence
Source: SEC Form 13F
Open SEC evidence
Latest holder context comes from 673 institutions filings for Q1 2026.
Security key
02156V109
Latest holder period
Q1 2026
13F holders
673
13D/G owners
5
CIK / CUSIP context first
Open Q1 2026 holders
OKLO full holder history
Oklo Inc. SEC filings
Oklo Inc. company facts
Oklo Inc. insider transactions
Broader feeds
Recent Quarterly Holder Reports
Open recent reporting periods for CUSIP 02156V109:
13D/G owners
Significant owners
Large-stake holder rows connected to Schedule 13D/G evidence.
Rows
5
Security
OKLO
| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| DeWitte Jacob | 11% | -9.2% | $1,075,892,182 | -$31,399,020 | 20,559,091 | -2.8% | Jacob DeWitte | 01 Jul 2026 |
| VANGUARD GROUP INC | 7.8% | +32% | $1,294,178,833 | +$323,940,102 | 11,593,468 | +33% | The Vanguard Group | 30 Sep 2025 |
| Altman Samuel H. | 4.8% | -42% | $162,535,825 | -$81,084,026 | 6,650,402 | -33% | Samuel H. Altman | 06 Mar 2025 |
| BlackRock, Inc. | 3.6% | -62% | $325,784,863 | -$428,779,722 | 6,225,585 | -57% | BlackRock, Inc. | 30 Jun 2026 |
| Data Collective IV, L.P. | 4.4% | $131,541,335 | 5,382,215 | Matthew Ocko | 31 Dec 2024 |
As of 31 Mar 2026, 673 institutional investors reported holding 89,251,230 shares of Oklo Inc. - Class A Stock (OKLO). This represents 52% of the company’s total 172,932,917 outstanding shares.
13F concentration
Top 25 institutional shareholders
Largest 13F positions for this security by reported shares and value.
Top holder share
40%
| Institution | Ownership % | Shares Held | Share Change % | Portfolio % | Holdings Value |
|---|---|---|---|---|---|
| BlackRock, Inc. | 9.2% | 15,907,512 | +7.3% | 0.01% | $788,853,528 |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 5.1% | 8,856,496 | +13% | 0.6% | $439,193,636 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 3.6% | 6,237,918 | 0% | 0.02% | $309,338,354 |
| VAN ECK ASSOCIATES CORP | 3.5% | 6,081,517 | +54% | 0.23% | $301,583,000 |
| VANGUARD CAPITAL MANAGEMENT LLC | 3.4% | 5,830,933 | 0% | 0.01% | $289,155,967 |
| Defiance ETFs, LLC | 2.1% | 3,643,044 | 2.6% | $180,658,552 | |
| STATE STREET CORP | 1.9% | 3,326,142 | +8.7% | 0.01% | $164,943,382 |
| GEODE CAPITAL MANAGEMENT, LLC | 1.8% | 3,054,149 | +8.5% | 0.01% | $151,188,902 |
| MORGAN STANLEY | 1.6% | 2,681,738 | +42% | 0.01% | $132,987,427 |
| Alyeska Investment Group, L.P. | 0.99% | 1,709,692 | 0.24% | $84,783,626 | |
| UBS Group AG | 0.7% | 1,206,299 | +20% | 0.01% | $59,820,368 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 0.69% | 1,185,731 | +2.2% | 0.01% | $58,800,400 |
| NORTHERN TRUST CORP | 0.67% | 1,153,066 | +13% | 0.01% | $57,180,544 |
| GOLDMAN SACHS GROUP INC | 0.6% | 1,041,926 | +15% | 0.01% | $51,669,110 |
| VANGUARD FIDUCIARY TRUST CO | 0.47% | 820,630 | 0% | 0.01% | $40,695,042 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | 0.39% | 665,979 | +1700% | 0.04% | $33,025,899 |
| BANK OF AMERICA CORP /DE/ | 0.36% | 620,281 | +55% | 0% | $30,759,753 |
| NATIONAL BANK OF CANADA /FI/ | 0.35% | 609,164 | +641% | 0.03% | $30,206,050 |
| Marex Group plc | 0.34% | 589,864 | -25% | 0.3% | $29,251,356 |
| PORTLAND INVESTMENT COUNSEL INC. | 0.34% | 589,480 | -5.4% | 9.4% | $29,232,313 |
| Hood River Capital Management LLC | 0.34% | 589,294 | 0.29% | $29,223,089 | |
| Capital World Investors | 0.31% | 537,354 | +6.2% | 0% | $26,647,385 |
| BANK OF MONTREAL /CAN/ | 0.31% | 537,170 | -24% | 0.01% | $26,638,261 |
| LPL Financial LLC | 0.31% | 533,951 | +6.4% | 0.01% | $26,478,630 |
| JANE STREET GROUP, LLC | 0.31% | 533,000 | 0.03% | $26,431,470 |
Quarter history
Institutional holders across reporting periods
Holder count, reported shares/value, and median price by quarter.
Periods
20
Latest
Q1 2026
Rows shown
1-20 of 20
| Period | 13F Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q2 | 5,221,021 | $273,314,464 | +$8,339,217 | $52.33 | 309 |
| 2026 Q1 | 89,251,230 | $4,429,707,147 | +$573,892,791 | $49.59 | 673 |
| 2025 Q4 | 74,642,355 | $5,356,633,187 | +$599,881,288 | $71.76 | 675 |
| 2025 Q3 | 64,821,474 | $7,231,826,607 | +$1,392,276,072 | $111.63 | 633 |
| 2025 Q2 | 54,037,247 | $3,025,526,482 | +$1,210,811,554 | $55.99 | 471 |
| 2025 Q1 | 34,393,412 | $743,846,419 | -$148,711,672 | $21.63 | 284 |
| 2024 Q4 | 41,314,990 | $878,004,505 | -$16,955,330 | $21.23 | 229 |
| 2024 Q3 | 45,243,814 | $366,091,868 | +$47,251,351 | $8.09 | 117 |
| 2024 Q2 | 39,977,637 | $338,608,593 | +$109,326,363 | $8.47 | 93 |
| 2024 Q1 | 23,708,784 | $270,750,192 | -$26,000,190 | $11.42 | 53 |
| 2023 Q4 | 26,020,463 | $274,825,889 | -$165,222,873 | $10.56 | 37 |
| 2023 Q3 | 41,864,000 | $433,274,528 | -$3,262,818 | $10.35 | 64 |
| 2023 Q2 | 42,090,156 | $439,000,288 | -$67,270,173 | $10.43 | 74 |
| 2023 Q1 | 48,073,284 | $487,949,431 | +$22,100,014 | $10.15 | 71 |
| 2022 Q4 | 47,004,958 | $466,276,234 | -$10,079,589 | $9.92 | 72 |
| 2022 Q3 | 48,596,744 | $474,224,116 | +$24,315,279 | $9.76 | 76 |
| 2022 Q2 | 45,432,316 | $438,816,929 | -$27,927,226 | $9.65 | 72 |
| 2022 Q1 | 47,355,551 | $462,202,000 | -$7,363,269 | $9.76 | 67 |
| 2021 Q4 | 46,964,495 | $462,588,000 | -$2,851,621 | $9.85 | 66 |
| 2021 Q3 | 47,263,446 | $464,430,000 | +$462,957,000 | $9.83 | 70 |