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 May 2026
- Symbol
- OKLO on NYSE
- Ownership evidence mix
- 3/4/5, 13D/G, and 13F
- Largest current holder
- Jacob DeWitte
- Latest large-stake holder
- Jacob DeWitte
- Latest evidence date
- 01 May 2026
- CIK
- 0001849056
- Location
- Santa Clara, CA
Ownership snapshot
2 facts
Issuer identity
2 facts
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 May 2026
3/4/5
13D/G
13F
Lead comparable stake: 12%
13D/G row: Jacob DeWitte
Showing 1-8 of 50 holder rows.
Quick read
Jacob DeWitte leads the comparable SEC ownership view at 12%.
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.
Comparable ownership
Top 5
Jacob DeWitte
12%
BlackRock, Inc.
9.2%
VANGUARD GROUP INC
7.8%
Samuel H. Altman
4.8%
Data Collective IV, L.P.
4.4%
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 |
3/4/5
13D/G
Co-Founder, CEO, Director, 10%+ Owner
|
12%
from 13D/G
|
$1,099,338,253
20,974,786 shares
mixed-class rows
|
-$289,248,291 | 01 May 2026 |
| BlackRock, Inc. |
13D/G
13F
Company
|
9.2%
|
$1,034,732,556
14,419,350 shares
|
+$455,193,414 | 31 Dec 2025 |
| 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 |
| Michael Stuart Klein |
3/4/5
Director, 10%+ Owner
|
0.09%
|
$20,280,000
150,000 shares
|
-$25,194,840 | 22 Sep 2025 |
| Richard Kinzley |
3/4/5
Director
|
0.01%
|
$1,718,418
19,554 shares
mixed-class rows
|
-$208,360 | 27 Mar 2026 |
| John M. Jansen |
3/4/5
Director
|
0.01%
|
$972,715
12,354 shares
mixed-class rows
|
-$540,960 | 27 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.
Forms 3/4/5 flow
Insider trading overview
Net insider flow leans to selling over the last 12 months. Net value: -$634,446,196.
Buys
$0
Insiders: 0
Sells
$634,446,196
Insiders: 8
Net
-$634,446,196
Shares: -7,920,301
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 0
Shares: 7,920,301
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 1,606,388 | $0 | $97,750,827 | -$97,750,827 |
| 3-6 | 0 | 3,404,726 | $0 | $296,481,277 | -$296,481,277 |
| 6-9 | 0 | 1,409,187 | $0 | $155,470,449 | -$155,470,449 |
| 9-12 | 0 | 1,500,000 | $0 | $84,743,643 | -$84,743,643 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-20 of 21 reporting-owner rows connected to Oklo Inc.. Open a relationship link for the CIK-to-CIK filing trail.
Rows
21
Largest current holder
Caroline Cochran
Net 12M change
-$634,446,196
Latest report
19 May 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Caroline Cochran | Co-Founder, COO, Director, 10%+ Owner | $1,099,338,253 | -$289,248,512 | -21% | Mixed | 01 May 2026 |
| Jacob DeWitte | Co-Founder, CEO, Director, 10%+ Owner | $1,099,338,253 | -$289,248,291 | -21% | Mixed | 01 May 2026 |
| Samuel H. Altman | Director | $80,726,056 | Mixed | 19 Nov 2024 | ||
| Richard Craig Bealmear | Chief Financial Officer | $24,006,286 | -$23,683,228 | -50% | Mixed | 01 May 2026 |
| Michael Stuart Klein | Director, 10%+ Owner | $20,280,000 | -$25,194,840 | -55% | Filing P/S | 22 Sep 2025 |
| William Carroll Murphy Goodwin | Chief Legal & Strategy Officer | $2,099,597 | -$6,007,920 | -74% | Filing P/S | 19 May 2026 |
| Richard Kinzley | Director | $1,718,418 | -$208,360 | -11% | Mixed | 27 Mar 2026 |
| Patrick Joseph Schweiger | Chief Technology Officer | $1,097,406 | -$314,085 | -22% | Filing P/S | 24 Mar 2026 |
| John M. Jansen | Director | $972,715 | -$540,960 | -36% | Mixed | 27 Mar 2026 |
| Daniel B. Poneman | Director | $806,898 | Mixed | 06 Mar 2025 | ||
| Christopher A. Wright | Director | $336,237 | Mixed | 10 Jul 2024 | ||
| Michael N. Thompson Jr. | Director | $68,748 | Mixed | 04 Mar 2025 | ||
| Peters Mark T. | Director | $4,959 | Median | 10 Apr 2026 | ||
| Allison Green | Director | Mixed | 07 Jul 2021 | |||
| Peter Lattman | Director | Mixed | 10 Nov 2021 | |||
| John L. Thornton | Director | Mixed | 07 Jul 2021 | |||
| Frances X. Frei | Director | Mixed | 07 Jul 2021 | |||
| Lee Jay Taragin | Chief Financial Officer | Mixed | 07 Jul 2021 | |||
| Kan Derek T. | Director | Mixed | 10 Apr 2026 | |||
| David G. Park | Director | Mixed | 10 Apr 2026 |
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 |
|---|---|---|---|---|---|---|---|---|---|---|
| William Carroll Murphy Goodwin | OKLO | Class A Common Stock | Sale | -22.6% | $612,206 | $58.04 | -10,548 | 36,175 | 20 May 2026 | Direct |
| William Carroll Murphy Goodwin | OKLO | Class A Common Stock | Options Exercise | 79.4% | 20,686 | 46,723 | 19 May 2026 | Direct | ||
| William Carroll Murphy Goodwin | OKLO | Restricted Stock Units | Options Exercise | -12.4% | -20,686 | 146,072 | 19 May 2026 | Direct | ||
| Richard Craig Bealmear | OKLO | Class A Common Stock | Options Exercise | 1.5% | 5,880 | 397,642 | 04 May 2026 | Direct | ||
| Richard Craig Bealmear | OKLO | Stock Options | Options Exercise | -0.73% | -5,880 | 802,403 | 04 May 2026 | Direct | ||
| Richard Craig Bealmear | OKLO | Class A Common Stock | Sale | -3.97% | $1,133,823 | $69.92 | -16,216 | 391,762 | 01 May 2026 | Direct |
| Richard Craig Bealmear | OKLO | Class A Common Stock | Options Exercise | 4.14% | 16,216 | 407,978 | 01 May 2026 | Direct | ||
| Richard Craig Bealmear | OKLO | Stock Options | Options Exercise | -1.97% | -16,216 | 808,283 | 01 May 2026 | Direct | ||
| Jacob DeWitte | OKLO | Class A Common Stock | Sale | -5.8% | $2,838,000 | $70.95 | -40,000 | 649,479 | 01 May 2026 | By Caroline Cochran GRAT |
| Jacob DeWitte | OKLO | Class A Common Stock | Sale | -9.12% | $4,211,400 | $70.19 | -60,000 | 598,039 | 01 May 2026 | By Caroline Cochran |
| Jacob DeWitte | OKLO | Class A Common Stock | Sale | -6.09% | $2,820,208 | $70.51 | -40,000 | 616,483 | 01 May 2026 | By Jacob DeWitte GRAT |
| Jacob DeWitte | OKLO | Class A Common Stock | Sale | -8.68% | $4,176,782 | $69.61 | -60,000 | 631,533 | 01 May 2026 | Direct |
| Caroline Cochran | OKLO | Class A Common Stock | Sale | -6.09% | $2,820,429 | $70.51 | -40,000 | 616,483 | 01 May 2026 | By Jacob DeWitte GRAT |
| Caroline Cochran | OKLO | Class A Common Stock | Sale | -8.68% | $4,176,782 | $69.61 | -60,000 | 631,533 | 01 May 2026 | By Jacob DeWitte |
| Caroline Cochran | OKLO | Class A Common Stock | Sale | -5.8% | $2,838,000 | $70.95 | -40,000 | 649,479 | 01 May 2026 | By Caroline Cochran GRAT |
| Caroline Cochran | OKLO | Class A Common Stock | Sale | -9.12% | $4,211,400 | $70.19 | -60,000 | 598,039 | 01 May 2026 | Direct |
| David A. Christian | OKLO | Restricted Stock Units | Award | 4,699 | 4,699 | 10 Apr 2026 | Direct | |||
| Peters Mark T. | OKLO | Restricted Stock Units | Award | 4,699 | 4,699 | 10 Apr 2026 | Direct | |||
| Kan Derek T. | OKLO | Restricted Stock Units | Award | 4,699 | 4,699 | 10 Apr 2026 | Direct | |||
| David G. Park | OKLO | Restricted Stock Units | Award | 4,699 | 4,699 | 10 Apr 2026 | Direct | |||
| Richard Craig Bealmear | OKLO | Class A Common Stock | Options Exercise | 1.49% | 5,754 | 391,762 | 02 Apr 2026 | Direct | ||
| Richard Craig Bealmear | OKLO | Stock Options | Options Exercise | -0.69% | -5,754 | 824,499 | 02 Apr 2026 | Direct | ||
| Richard Craig Bealmear | OKLO | Class A Common Stock | Sale | -4.06% | $834,749 | $51.08 | -16,342 | 386,008 | 01 Apr 2026 | Direct |
| Richard Craig Bealmear | OKLO | Class A Common Stock | Options Exercise | 4.23% | 16,342 | 402,350 | 01 Apr 2026 | Direct | ||
| Richard Craig Bealmear | OKLO | Stock Options | Options Exercise | -1.93% | -16,342 | 830,253 | 01 Apr 2026 | Direct | ||
| Jacob DeWitte | OKLO | Class A Common Stock | Sale | -5.48% | $2,020,000 | $50.50 | -40,000 | 689,479 | 01 Apr 2026 | By Caroline Cochran GRAT |
| Jacob DeWitte | OKLO | Class A Common Stock | Sale | -8.36% | $3,014,926 | $50.25 | -60,000 | 658,039 | 01 Apr 2026 | By Caroline Cochran |
| Jacob DeWitte | OKLO | Class A Common Stock | Sale | -5.74% | $2,020,000 | $50.50 | -40,000 | 656,483 | 01 Apr 2026 | By Jacob DeWitte GRAT |
| Jacob DeWitte | OKLO | Class A Common Stock | Sale | -7.98% | $3,014,926 | $50.25 | -60,000 | 691,533 | 01 Apr 2026 | Direct |
| Caroline Cochran | OKLO | Class A Common Stock | Sale | -5.74% | $2,020,000 | $50.50 | -40,000 | 656,483 | 01 Apr 2026 | By Jacob DeWitte GRAT |
| Caroline Cochran | OKLO | Class A Common Stock | Sale | -7.98% | $3,014,926 | $50.25 | -60,000 | 691,533 | 01 Apr 2026 | By Jacob DeWitte |
| Caroline Cochran | OKLO | Class A Common Stock | Sale | -5.48% | $2,020,000 | $50.50 | -40,000 | 689,479 | 01 Apr 2026 | By Caroline Cochran GRAT |
| Caroline Cochran | OKLO | Class A Common Stock | Sale | -8.36% | $3,014,926 | $50.25 | -60,000 | 658,039 | 01 Apr 2026 | Direct |
| Jacob DeWitte | OKLO | Class A Common Stock | Other | 474,011 | 474,011 | 31 Mar 2026 | By Caroline Cochran GRAT No.3 | |||
| Jacob DeWitte | OKLO | Class A Common Stock | Other | 506,807 | 506,807 | 31 Mar 2026 | By Jacob DeWitte GRAT No. 3 | |||
| Caroline Cochran | OKLO | Class A Common Stock | Other | 506,807 | 506,807 | 31 Mar 2026 | By Jacob DeWitte GRAT No.3 | |||
| Caroline Cochran | OKLO | Class A Common Stock | Other | 474,011 | 474,011 | 31 Mar 2026 | By Caroline DeWitt GRAT No. 3 | |||
| Jacob DeWitte | OKLO | Class A Common Stock | Other | 6.67% | 474,011 | 7,583,085 | 30 Mar 2026 | By the Caroline DeWitte Family Trust | ||
| Jacob DeWitte | OKLO | Class A Common Stock | Other | 6.9% | 506,807 | 7,851,901 | 30 Mar 2026 | By the Jacob DeWitte Family Trust | ||
| Caroline Cochran | OKLO | Class A Common Stock | Other | 6.9% | 506,807 | 7,851,901 | 30 Mar 2026 | By the Jacob DeWitte Family Trust | ||
| Caroline Cochran | OKLO | Class A Common Stock | Other | 6.67% | 474,011 | 7,583,085 | 30 Mar 2026 | By the Caroline DeWitte Family Trust | ||
| Richard Kinzley | OKLO | Class A Common Stock | Gift | -5.4% | -900 | 15,754 | 27 Mar 2026 | Richard W. and Cynthia M. Kinzley Revocable Trust | ||
| Richard Kinzley | OKLO | Class A Common Stock | Sale | -19.4% | $208,360 | $52.09 | -4,000 | 16,654 | 27 Mar 2026 | Richard W. and Cynthia M. Kinzley Revocable Trust |
| John M. Jansen | OKLO | Class A Common Stock | Sale | -45.9% | $540,960 | $51.52 | -10,500 | 12,354 | 27 Mar 2026 | Direct |
| Patrick Joseph Schweiger | OKLO | Class A Common Stock | Sale | -22.2% | $314,085 | $56.48 | -5,561 | 19,430 | 25 Mar 2026 | Direct |
| William Carroll Murphy Goodwin | OKLO | Class A Common Stock | Sale | -29% | $600,891 | $56.48 | -10,639 | 26,037 | 25 Mar 2026 | Direct |
| Patrick Joseph Schweiger | OKLO | Class A Common Stock | Options Exercise | 106.4% | 12,882 | 24,991 | 24 Mar 2026 | Direct | ||
| Patrick Joseph Schweiger | OKLO | Restricted Stock Units | Options Exercise | -17.9% | -12,882 | 59,034 | 24 Mar 2026 | Direct | ||
| William Carroll Murphy Goodwin | OKLO | Class A Common Stock | Options Exercise | 129.4% | 20,685 | 36,676 | 24 Mar 2026 | Direct | ||
| William Carroll Murphy Goodwin | OKLO | Restricted Stock Units | Options Exercise | -11% | -20,685 | 166,758 | 24 Mar 2026 | Direct |
* marks a reported price that did not pass the local price check.