Comparable stake leader
Jacob DeWitte
SEC ownership of Oklo Inc.
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0001849056.
Disclosed value leader
VANGUARD GROUP INC
Comparable rows
50/50
Latest evidence
01 Jul 2026
- Public ticker
- OKLO on NYSE
- Parsed ownership sources
-
13D/G, 3/4/5, and 13F
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
- Largest SEC-reported holder
-
Jacob DeWitte
Ranking: Comparable ownership first, then disclosed value
- Comparable ownership rows
-
50 of 50
Meaning: Rows with safely comparable ownership %
- Latest 13D/G holder
-
Jacob DeWitte
Source: Latest parsed Schedule 13D/G stake
- Latest parsed ownership date
-
01 Jul 2026
Freshness: Most recent filing date in this holder set
- Issuer CIK
- 0001849056
- Issuer location
- Santa Clara, CA
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
3 signals
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of Oklo Inc. (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
Jacob DeWitte
Disclosed value leader
VANGUARD GROUP INC
Comparable rows
50/50
Latest evidence
01 Jul 2026
13D/G
3/4/5
13F
Lead comparable stake: 11%
13D/G row: Jacob DeWitte
Showing 1-8 of 50 holder rows.
Quick read
Jacob DeWitte leads the comparable SEC ownership view at 11%.
50 of 50 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 Jacob DeWitte's linked filing trail.
Comparable ownership
Top 5
Jacob DeWitte
11%
VANGUARD GROUP INC
7.8%
Samuel H. Altman
4.8%
Data Collective IV, L.P.
4.4%
BlackRock, Inc.
3.6%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-8 of 50 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| Jacob DeWitte |
13D/G
3/4/5
Co-Founder, CEO, Director, 10%+ Owner
|
11%
|
$1,075,892,182
20,559,091 shares
|
-$31,399,020 | 01 Jul 2026 |
| 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
|
$382,635,288
7,311,968 shares
|
— | 30 Jun 2026 |
| Michael Stuart Klein |
3/4/5
Director, 10%+ Owner
|
0.09%
|
$20,280,000
150,000 shares
|
— | 22 Sep 2025 |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. |
13F
Company
|
5.2%
|
$467,611,565
8,935,822 shares
|
— | 30 Jun 2026 |
| VAN ECK ASSOCIATES CORP |
13F
Company
|
4.6%
|
$414,053,432
7,912,353 shares
|
— | 30 Jun 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.
Forms 3/4/5 flow
Insider trading overview
Net insider flow leans to selling over the last 12 months. Net value: -$471,805,491.
Buys
$0
Insiders: 0
Sells
$471,805,491
Insiders: 10
Net
-$471,805,491
Shares: -6,460,773
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 0
Shares: 6,460,773
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 542,457 | $0 | $21,492,986 | -$21,492,986 |
| 3-6 | 0 | 1,316,166 | $0 | $84,185,373 | -$84,185,373 |
| 6-9 | 0 | 2,829,350 | $0 | $220,219,344 | -$220,219,344 |
| 9-12 | 0 | 1,772,800 | $0 | $145,907,789 | -$145,907,789 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-20 of 26 reporting-owner rows connected to Oklo Inc.. Open a relationship link for the CIK-to-CIK filing trail.
Rows
26
Largest Forms 3/4/5 holder
Jacob DeWitte
Net 12M change
-$471,805,492
Latest report
26 Sep 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Jacob DeWitte | Co-Founder, CEO, Director, 10%+ Owner | $1,045,943,391 | -$222,550,968 | -18% | Mixed | 01 Sep 2026 |
| Caroline Cochran | Co-Founder, COO, Director, 10%+ Owner | $1,045,943,391 | -$222,551,188 | -18% | Mixed | 01 Sep 2026 |
| Samuel H. Altman | Director | $80,726,056 | Mixed | 19 Nov 2024 | ||
| Richard Craig Bealmear | Chief Financial Officer | $28,444,945 | -$21,386,390 | -43% | Mixed | 01 Sep 2026 |
| Alexandra Renner | Chief Product Officer | $23,947,965 | -$137,393 | -0.57% | Mixed | 26 Sep 2026 |
| Michael Stuart Klein | Director, 10%+ Owner | $20,280,000 | Filing P/S | 22 Sep 2025 | ||
| John Hanson | Chief of Staff | $13,510,876 | -$62,565 | -0.46% | Filing P/S | 26 Sep 2026 |
| William Carroll Murphy Goodwin | Chief Strategy Officer | $1,749,365 | -$3,634,400 | -68% | Filing P/S | 26 Sep 2026 |
| Richard Kinzley | Director | $1,718,418 | -$208,360 | -11% | Mixed | 11 Jun 2026 |
| Patrick Joseph Schweiger | Chief Technology Officer | $1,097,406 | -$314,085 | -22% | Filing P/S | 24 Mar 2026 |
| Daniel B. Poneman | Director | $806,898 | Mixed | 11 Jun 2026 | ||
| Vivek Narayanadas | General Counsel & Secretary | $699,599 | -$186,182 | -21% | Median | 11 Sep 2026 |
| John M. Jansen | Director | $556,257 | -$773,961 | -58% | Mixed | 14 Sep 2026 |
| Christopher A. Wright | Director | $336,237 | Mixed | 10 Jul 2024 | ||
| Michael N. Thompson Jr. | Director | $68,748 | Mixed | 11 Jun 2026 | ||
| Peters Mark T. | Director | $4,959 | Mixed | 11 Jun 2026 | ||
| Lee Jay Taragin | Chief Financial Officer | Mixed | 07 Jul 2021 | |||
| Frances X. Frei | Director | Mixed | 07 Jul 2021 | |||
| John L. Thornton | Director | Mixed | 07 Jul 2021 | |||
| Allison Green | Director | Mixed | 07 Jul 2021 |
Recent insider transactions for Oklo Inc.
Showing up to 300 recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | SEC-reported value | SEC-reported price | Shares | Shares owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| John Hanson | OKLO | Class A Common Stock | Sale | -0.3% | $41,129 | $37.39 | -1,100 | 361,350 | 28 Sep 2026 | Direct |
| Alexandra Renner | OKLO | Class A Common Stock | Sale | -0.23% | $41,129 | $37.39 | -1,100 | 477,595 | 28 Sep 2026 | Direct |
| William Carroll Murphy Goodwin | OKLO | Class A Common Stock | Sale | -3.66% | $66,367 | $37.39 | -1,775 | 46,787 | 28 Sep 2026 | Direct |
| John Hanson | OKLO | Class A Common Stock | Options Exercise | 0.57% | 2,059 | 362,450 | 26 Sep 2026 | Direct | ||
| John Hanson | OKLO | Restricted Stock Units | Options Exercise | -3.74% | -2,059 | 53,062 | 26 Sep 2026 | Direct | ||
| Alexandra Renner | OKLO | Class A Common Stock | Options Exercise | 0.52% | 2,471 | 478,695 | 26 Sep 2026 | Direct | ||
| Alexandra Renner | OKLO | Restricted Stock Units | Options Exercise | -1.91% | -2,471 | 127,171 | 26 Sep 2026 | Direct | ||
| William Carroll Murphy Goodwin | OKLO | Class A Common Stock | Options Exercise | 7.28% | 3,294 | 48,562 | 26 Sep 2026 | Direct | ||
| William Carroll Murphy Goodwin | OKLO | Restricted Stock Units | Options Exercise | -3.37% | -3,294 | 94,593 | 26 Sep 2026 | Direct | ||
| Alexandra Renner | OKLO | Class A Common Stock | Gift | -5.49% | -6,763 | 116,390 | 14 Sep 2026 | Joint account with spouse | ||
| John M. Jansen | OKLO | Class A Common Stock | Sale | -51.4% | $233,001 | $36.67 | -6,354 | 6,000 | 14 Sep 2026 | Direct |
| Alexandra Renner | OKLO | Class A Common Stock | Options Exercise | 0.25% | 1,202 | 476,224 | 13 Sep 2026 | Direct | ||
| Alexandra Renner | OKLO | Restricted Stock Units | Options Exercise | -0.92% | -1,202 | 129,642 | 13 Sep 2026 | Direct | ||
| John Hanson | OKLO | Class A Common Stock | Options Exercise | 0.27% | 961 | 360,391 | 13 Sep 2026 | Direct | ||
| John Hanson | OKLO | Restricted Stock Units | Options Exercise | -1.71% | -961 | 55,121 | 13 Sep 2026 | Direct | ||
| Vivek Narayanadas | OKLO | Class A Common Stock | Options Exercise | 2.57% | 210 | 8,369 | 11 Sep 2026 | Direct | ||
| Vivek Narayanadas | OKLO | Restricted Stock Units | Options Exercise | -0.43% | -210 | 48,335 | 11 Sep 2026 | Direct | ||
| Vivek Narayanadas | OKLO | Class A Common Stock | Sale | -4.28% | $15,808 | $43.31 | -365 | 8,159 | 09 Sep 2026 | Direct |
| Vivek Narayanadas | OKLO | Class A Common Stock | Sale | -2.72% | $10,010 | $42.06 | -238 | 8,524 | 08 Sep 2026 | Direct |
| Vivek Narayanadas | OKLO | Class A Common Stock | Options Exercise | 8.51% | 687 | 8,762 | 08 Sep 2026 | Direct | ||
| Vivek Narayanadas | OKLO | Restricted Stock Units | Options Exercise | -20% | -687 | 2,746 | 08 Sep 2026 | Direct | ||
| Vivek Narayanadas | OKLO | Class A Common Stock | Sale | -6.25% | $21,455 | $39.88 | -538 | 8,075 | 04 Sep 2026 | Direct |
| Vivek Narayanadas | OKLO | Class A Common Stock | Options Exercise | 13.3% | 1,014 | 8,613 | 03 Sep 2026 | Direct | ||
| Vivek Narayanadas | OKLO | Restricted Stock Units | Options Exercise | -5.55% | -1,014 | 17,241 | 03 Sep 2026 | Direct | ||
| Richard Craig Bealmear | OKLO | Class A Common Stock | Options Exercise | 1.24% | 5,666 | 461,642 | 02 Sep 2026 | Direct | ||
| Richard Craig Bealmear | OKLO | Stock Options | Options Exercise | -0.91% | -5,666 | 614,019 | 02 Sep 2026 | Direct | ||
| Alexandra Renner | OKLO | Class A Common Stock | Sale | -0.4% | $74,112 | $38.40 | -1,930 | 475,022 | 01 Sep 2026 | Direct |
| Richard Craig Bealmear | OKLO | Class A Common Stock | Sale | -3.48% | $636,827 | $38.76 | -16,430 | 455,976 | 01 Sep 2026 | Direct |
| Richard Craig Bealmear | OKLO | Class A Common Stock | Options Exercise | 3.6% | 16,430 | 472,406 | 01 Sep 2026 | Direct | ||
| Richard Craig Bealmear | OKLO | Stock Options | Options Exercise | -2.58% | -16,430 | 619,685 | 01 Sep 2026 | Direct | ||
| Jacob DeWitte | OKLO | Class A Common Stock | Sale | -3.64% | $777,654 | $38.88 | -20,000 | 529,479 | 01 Sep 2026 | By Caroline Cochran GRAT |
| Jacob DeWitte | OKLO | Class A Common Stock | Sale | -9.13% | $1,546,400 | $38.66 | -40,000 | 398,039 | 01 Sep 2026 | By Caroline Cochran |
| Jacob DeWitte | OKLO | Class A Common Stock | Sale | -3.87% | $771,200 | $38.56 | -20,000 | 496,483 | 01 Sep 2026 | By Jacob DeWitte GRAT |
| Jacob DeWitte | OKLO | Class A Common Stock | Sale | -8.48% | $1,536,000 | $38.40 | -40,000 | 431,533 | 01 Sep 2026 | Direct |
| Caroline Cochran | OKLO | Class A Common Stock | Sale | -3.87% | $771,200 | $38.56 | -20,000 | 496,483 | 01 Sep 2026 | By Jacob DeWitte GRAT |
| Caroline Cochran | OKLO | Class A Common Stock | Sale | -8.48% | $1,536,000 | $38.40 | -40,000 | 431,533 | 01 Sep 2026 | By Jacob DeWitte |
| Caroline Cochran | OKLO | Class A Common Stock | Sale | -3.64% | $777,654 | $38.88 | -20,000 | 529,479 | 01 Sep 2026 | By Caroline Cochran GRAT |
| Caroline Cochran | OKLO | Class A Common Stock | Sale | -9.13% | $1,546,400 | $38.66 | -40,000 | 398,039 | 01 Sep 2026 | Direct |
| Alexandra Renner | OKLO | Class A Common Stock | Options Exercise | 0.88% | 4,173 | 476,952 | 31 Aug 2026 | Direct | ||
| Alexandra Renner | OKLO | Restricted Stock Units | Options Exercise | -8% | -4,173 | 48,001 | 31 Aug 2026 | Direct | ||
| Vivek Narayanadas | OKLO | Class A Common Stock | Sale | -2.85% | $9,098 | $40.80 | -223 | 7,599 | 25 Aug 2026 | Direct |
| Alexandra Renner | OKLO | Class A Common Stock | Sale | -0.12% | $22,152 | $39.77 | -557 | 472,779 | 24 Aug 2026 | Direct |
| John Hanson | OKLO | Class A Common Stock | Sale | -0.15% | $21,436 | $39.77 | -539 | 359,430 | 24 Aug 2026 | Direct |
| William Carroll Murphy Goodwin | OKLO | Class A Common Stock | Sale | -20.4% | $461,014 | $39.77 | -11,592 | 45,268 | 24 Aug 2026 | Direct |
| Vivek Narayanadas | OKLO | Class A Common Stock | Sale | -29.4% | $129,809 | $39.77 | -3,264 | 7,822 | 24 Aug 2026 | Direct |
| Vivek Narayanadas | OKLO | Class A Common Stock | Options Exercise | 76.5% | 4,806 | 11,086 | 21 Aug 2026 | Direct | ||
| Vivek Narayanadas | OKLO | Restricted Stock Units | Options Exercise | -26.3% | -4,806 | 13,449 | 21 Aug 2026 | Direct | ||
| Alexandra Renner | OKLO | Class A Common Stock | Options Exercise | 0.25% | 1,201 | 473,336 | 13 Aug 2026 | Direct | ||
| Alexandra Renner | OKLO | Restricted Stock Units | Options Exercise | -2.27% | -1,201 | 51,659 | 13 Aug 2026 | Direct | ||
| John Hanson | OKLO | Class A Common Stock | Options Exercise | 0.27% | 961 | 359,969 | 13 Aug 2026 | Direct |
* marks a reported price that did not pass the local price check.