Security key
02156V109
- Security type / class
- Equity / Class A Stock
- Total 13F shares
- 5,221,021
- Total 13F value
- $273,314,464
- Share change
- +128,812
- Put/Call ratio
- 72%
- SEC-reported price per share
- $52.33
- Number of holders
- 309
- Value change
- +$8,339,217
- Number of buys
- 170
- Number of sells
- 122
- Shares outstanding
- 172,932,917
Holder snapshot
7 signals
Open additional details 1 more signal available
Security identity
Names, identifiers, and filing context for this profile.
1 source field
Report period
Q2 2026
Institutions
309
Top holders
10
OKLO full security history
Ownership snapshot
Full 13F holder table
Oklo Inc. SEC filings
Oklo Inc. company facts
Broader feeds
Ownership snapshot
Top reported holders of OKLO - Oklo Inc. - Class A Stock (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
VANGUARD GROUP INC
Disclosed value leader
VANGUARD GROUP INC
Comparable rows
15/15
Latest evidence
31 Mar 2026
13D/G
3/4/5
13F
Lead comparable stake: 7.8%
13D/G row: VANGUARD GROUP INC
Showing 1-6 of 15 holder rows.
Quick read
VANGUARD GROUP INC leads the comparable SEC ownership view at 7.8%.
15 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens VANGUARD GROUP INC's linked filing trail.
Comparable ownership
Top 5
VANGUARD GROUP INC
7.8%
Samuel H. Altman
4.8%
Data Collective IV, L.P.
4.4%
BlackRock, Inc.
3.6%
Michael Stuart Klein
0.09%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-6 of 15 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| VANGUARD GROUP INC |
13D/G
The Vanguard Group
|
7.8%
|
$1,294,178,833
11,593,468 shares
|
+$323,940,102 | 30 Sep 2025 |
| Samuel H. Altman |
13D/G
3/4/5
Director
|
4.8%
|
$162,535,825
6,650,402 shares
|
-$81,084,026 | 06 Mar 2025 |
| Data Collective IV, L.P. |
13D/G
Matthew Ocko
|
4.4%
|
$131,541,335
5,382,215 shares
|
$0 | 31 Dec 2024 |
| BlackRock, Inc. |
13F
13D/G
Company
|
3.6%
from 13D/G
|
$788,853,528
15,907,512 shares
|
— | 31 Mar 2026 |
| Michael Stuart Klein |
3/4/5
Director, 10%+ Owner
|
0.09%
|
$20,280,000
150,000 shares
|
-$6,687,912 | 22 Sep 2025 |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. |
13F
Company
|
5.1%
|
$439,193,636
8,856,496 shares
|
— | 31 Mar 2026 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
13F holder rows
Institutional holders as of Q2 2026
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
309
Shares
5,221,021
Rows available
309
| Investor | Option | Weight % | Change % | SEC-reported value | * Price | Shares | Share Change | Activity | Report Period |
|---|
* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.
Compare Q2 2026 vs Q1 2026 Across Filers
Q1 2026 holders
673
Q2 2026 holders
309
Holder diff
-364
| Investor | Q1 2026 Shares | Q2 2026 Shares | Share Diff | Share Chg % | Q1 2026 value | Q2 2026 value | Value change | Value Chg % |
|---|