OKLO · Oklo Inc. · Shareholders & Ownership

$26.35 -0.66 (-2.44%) At close · Oct 23

Russell 1000 member Rebalance outlook locked

Market Cap

$4.90B

186.02M

Volume · Oct 23 6.12M Avg daily vol (3M) 9.79M

Every disclosed holder of OKLO in one list: 13F institutions, Schedule 13D and 13G filers, insiders (Forms 3, 4 and 5) and registered funds, each from its own latest filing. Holders nest by CIK and SEC reporting links, never by name, and each is summed once.

How the holder list picks a filing →

Who Owns OKLO

13F quarter Sep 30, 2026, combined view: filers that have not filed yet carry their Jun 30, 2026 positions

Holder group	Holders	Shares	% Out	Summed
Institutional (13F)	653	81,112,144	43.60%	Yes
Insiders (Forms 3, 4, 5)	0	0	0.00%	No
13D/G-only blocks	7	38,835,338	20.88%	Yes
Remaining	—	66,070,168	35.52%	Rest
Registered funds (N-PORT, not summed)	207	34,733,864	18.67%	No

Shares outstanding: 186,017,650, the issuer's latest cover-page count restated onto today's split basis.

Insiders are listed but not summed: the issuer has more than one class of common stock and Forms 3, 4 and 5 report one issuer-wide balance across them.

13D/G-only counts each filer's latest 13D or 13G that no 13F report of the listing contains, that names no 13F filer and that no counted insider files. Funds are never summed: their shares sit inside their advisers' 13F reports.

Holders of OKLO

One row per holder Every filing By ultimate parent

All 13F Funds Insiders 13D/G Non-US

#	Holder	Shares	% Out	Change	As of	Notes
1	Cochran Caroline Insider CIK 2021786 · Oct 1, 2026 Director, Co-Founder, COO, 10% Owner, issuer-wide, not summed	20,151,338	10.83%	-120,000	Oct 1, 2026	Director, Co-Founder, COO, 10% Owner, issuer-wide, not summed
2	DeWitte Jacob Insider CIK 2021433 · Oct 1, 2026 Director, Co-Founder, CEO, 10% Owner, issuer-wide, not summed	20,151,338	10.83%	-120,000	Oct 1, 2026	Director, Co-Founder, CEO, 10% Owner, issuer-wide, not summed
2.1	Jacob DeWitte 13D CIK 2021433 · Unknown · Jul 1, 2026 Item 4 purpose: not restated by this amendment, the earlier 13D's purpose stands	20,559,091	11.05%	-600,000	Jul 1, 2026
3	MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. 13F CIK 1705339 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	8,935,822	4.80%	+79,326	Jun 30, 2026	carried, not yet filed for the newest quarter
3.1	Global X Uranium ETF Fund S000029442 · Registered fund · Jul 31, 2026 GLOBAL X FUNDS, not summed	8,533,600	4.59%	+656,694	Jul 31, 2026	GLOBAL X FUNDS, not summed
4	VAN ECK ASSOCIATES CORP 13F CIK 869178 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	7,912,353	4.25%	+1,830,836	Jun 30, 2026	carried, not yet filed for the newest quarter
4.1	VanEck Uranium and Nuclear ETF Fund S000018475 · Registered fund · Jun 30, 2026 VanEck ETF Trust, not summed	4,207,158	2.26%	+724,256	Jun 30, 2026	VanEck ETF Trust, not summed
4.2	VanEck Social Sentiment ETF Fund S000071092 · Registered fund · Jun 30, 2026 VanEck ETF Trust, not summed	11,420	0.01%	+5,109	Jun 30, 2026	VanEck ETF Trust, not summed
5	BlackRock, Inc. 13F CIK 2012383 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	7,311,968	3.93%	-8,595,544	Jun 30, 2026	carried, not yet filed for the newest quarter
5.1	BlackRock, Inc. 13G CIK 2012383 · Holding company · Jun 30, 2026 Rule 13d-1(b), qualified institution, not summed	6,225,585	3.35%	-8,193,765	Jun 30, 2026	Rule 13d-1(b), qualified institution, not summed
5.2	iShares Russell Mid-Cap ETF Fund S000004338 · Registered fund · Jun 30, 2026 iShares Trust, not summed	577,128	0.31%	—	Jun 30, 2026	iShares Trust, not summed
5.3	iShares Russell 1000 Value ETF Fund S000004345 · Registered fund · Jun 30, 2026 iShares Trust, not summed	314,514	0.17%	—	Jun 30, 2026	iShares Trust, not summed
5.4	iShares Defense Industrials Active ETF Fund S000092375 · Registered fund · Jul 31, 2026 BlackRock ETF Trust, not summed	255,341	0.14%	-161,202	Jul 31, 2026	BlackRock ETF Trust, not summed
5.5	iShares Russell Mid-Cap Value ETF Fund S000004335 · Registered fund · Jun 30, 2026 iShares Trust, not summed	216,143	0.12%	—	Jun 30, 2026	iShares Trust, not summed
6	Samuel H. Altman 13D CIK 1571705 · Unknown · Mar 6, 2025	6,650,402	3.58%	-3,317,677	Mar 6, 2025
6.1	Altman Samuel H. Insider CIK 1571705 · Nov 19, 2024 Director, issuer-wide, not summed	3,732,479	2.01%	+581,100	Nov 19, 2024	Director, issuer-wide, not summed
7	VANGUARD CAPITAL MANAGEMENT LLC 13F CIK 2100119 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	6,539,334	3.52%	+708,401	Jun 30, 2026	carried, not yet filed for the newest quarter
8	VANGUARD PORTFOLIO MANAGEMENT LLC 13F CIK 2100121 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	6,425,515	3.45%	+187,597	Jun 30, 2026	carried, not yet filed for the newest quarter
9	Matthew Ocko 13G CIK 1664972 · Unknown · Dec 31, 2024 Rule 13d-1(c), passive investor	5,382,215	2.89%	—	Dec 31, 2024	Rule 13d-1(c), passive investor
10	VANGUARD TOTAL STOCK MARKET INDEX FUND Fund S000002848 · Registered fund · Jun 30, 2026 VANGUARD INDEX FUNDS, not summed	4,696,672	2.52%	+477,719	Jun 30, 2026	VANGUARD INDEX FUNDS, not summed
11	VANGUARD SMALL-CAP INDEX FUND Fund S000002845 · Registered fund · Jun 30, 2026 VANGUARD INDEX FUNDS, not summed	3,392,862	1.82%	+330,598	Jun 30, 2026	VANGUARD INDEX FUNDS, not summed
12	MORGAN STANLEY 13F CIK 895421 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	3,262,878	1.75%	+581,140	Jun 30, 2026	carried, not yet filed for the newest quarter
12.1	Global Strategist Portfolio Fund S000004124 · Registered fund · Jun 30, 2026 MORGAN STANLEY INSTITUTIONAL FUND TRUST, not summed	330	0.00%	-65	Jun 30, 2026	MORGAN STANLEY INSTITUTIONAL FUND TRUST, not summed
12.2	E*TRADE No Fee Total Market Index Fund Fund S000090722 · Registered fund · Jul 31, 2026 E Trade Trust, not summed	175	0.00%	0	Jul 31, 2026	E Trade Trust, not summed
12.3	Global Strategist Portfolio Fund S000004181 · Registered fund · Jun 30, 2026 MORGAN STANLEY VARIABLE INSURANCE FUND INC., not summed	44	0.00%	-9	Jun 30, 2026	MORGAN STANLEY VARIABLE INSURANCE FUND INC., not summed
13	TIGER GLOBAL MANAGEMENT LLC 13G CIK 1167483 · Registered investment adviser · Aug 14, 2024 Rule 13d-1(c), passive investor	3,056,992	1.64%	0	Aug 14, 2024	Rule 13d-1(c), passive investor
14	STATE STREET CORP 13F CIK 93751 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	2,378,058	1.28%	-948,084	Jun 30, 2026	carried, not yet filed for the newest quarter
14.1	STATE STREET SMALL/MID CAP EQUITY INDEX PORTFOLIO Fund S000050332 · Registered fund · Jun 30, 2026 STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed	47,200	0.03%	+4,800	Jun 30, 2026	STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed
14.2	State Street(R) SPDR(R) Portfolio MSCI Global Stock Market ETF Fund S000036082 · Registered fund · Jun 30, 2026 SPDR INDEX SHARES FUNDS, not summed	2,318	0.00%	+752	Jun 30, 2026	SPDR INDEX SHARES FUNDS, not summed
14.3	State Street Balanced Index Fund Fund S000082802 · Registered fund · Jun 30, 2026 STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed	730	0.00%	+69	Jun 30, 2026	STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed
14.4	State Street Total Return V.I.S. Fund Fund S000001637 · Registered fund · Jun 30, 2026 STATE STREET VARIABLE INSURANCE SERIES FUNDS INC, not summed	700	0.00%	-2,200	Jun 30, 2026	STATE STREET VARIABLE INSURANCE SERIES FUNDS INC, not summed
14.5	State Street(R) SPDR(R) Russell 1000 Momentum Focus ETF Fund S000051788 · Registered fund · Jun 30, 2026 SPDR SERIES TRUST, not summed	38	0.00%	—	Jun 30, 2026	SPDR SERIES TRUST, not summed
15	GEODE CAPITAL MANAGEMENT, LLC 13F CIK 1214717 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	2,364,428	1.27%	-689,721	Jun 30, 2026	carried, not yet filed for the newest quarter
16	METEORA CAPITAL, LLC 13G CIK 1905106 · Investment adviser · Dec 31, 2023 Rule 13d-1(b), qualified institution	2,321,377	1.25%	—	Dec 31, 2023	Rule 13d-1(b), qualified institution
17	UBS Group AG 13F CIK 1610520 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	2,095,153	1.13%	+888,854	Jun 30, 2026	carried, not yet filed for the newest quarter
18	VANGUARD SMALL-CAP GROWTH INDEX FUND Fund S000002846 · Registered fund · Jun 30, 2026 VANGUARD INDEX FUNDS, not summed	1,954,182	1.05%	+238,882	Jun 30, 2026	VANGUARD INDEX FUNDS, not summed
19	NORGES BANK 13F CIK 1374170 · Non-US institution · Jun 30, 2026 carried, not yet filed for the newest quarter	1,758,267	0.95%	—	Jun 30, 2026	carried, not yet filed for the newest quarter
20	VANGUARD EXTENDED MARKET INDEX FUND Fund S000002841 · Registered fund · Jun 30, 2026 VANGUARD INDEX FUNDS, not summed	1,576,795	0.85%	+198,413	Jun 30, 2026	VANGUARD INDEX FUNDS, not summed
21	Clear Street Group Inc. 13F CIK 1881567 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	1,329,523	0.71%	+830,081	Jun 30, 2026	carried, not yet filed for the newest quarter
22	JANE STREET GROUP, LLC 13F CIK 1595888 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	1,269,146	0.68%	+736,146	Jun 30, 2026	carried, not yet filed for the newest quarter
23	Marex Group plc 13F CIK 1997464 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	1,207,636	0.65%	+617,772	Jun 30, 2026	carried, not yet filed for the newest quarter
24	NATIONAL BANK OF CANADA /FI/ 13F CIK 926171 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	1,185,312	0.64%	+576,148	Jun 30, 2026	carried, not yet filed for the newest quarter
25	GOLDMAN SACHS GROUP INC 13F CIK 886982 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	1,148,200	0.62%	+106,274	Jun 30, 2026	carried, not yet filed for the newest quarter
25.1	Goldman Sachs ActiveBeta(R) U.S. Small Cap Equity ETF Fund S000048296 · Registered fund · May 31, 2026 Goldman Sachs ETF Trust, not summed	18,361	0.01%	+246	May 31, 2026	Goldman Sachs ETF Trust, not summed
25.2	Goldman Sachs MarketBeta U.S. 1000 Equity ETF Fund S000075322 · Registered fund · May 31, 2026 Goldman Sachs ETF Trust II, not summed	5,011	0.00%	+875	May 31, 2026	Goldman Sachs ETF Trust II, not summed
25.3	Goldman Sachs Absolute Return Tracker Fund Fund S000020314 · Registered fund · Aug 31, 2026 GOLDMAN SACHS TRUST, not summed	94	0.00%	-847	Aug 31, 2026	GOLDMAN SACHS TRUST, not summed
26	CHARLES SCHWAB INVESTMENT MANAGEMENT INC 13F CIK 884546 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,138,236	0.61%	-47,495	Jun 30, 2026	carried, not yet filed for the newest quarter
26.1	Schwab U.S. Mid-Cap ETF Fund S000026635 · Registered fund · May 31, 2026 SCHWAB STRATEGIC TRUST, not summed	333,481	0.18%	+184	May 31, 2026	SCHWAB STRATEGIC TRUST, not summed
26.2	Schwab U.S. Large-Cap Growth ETF Fund S000026633 · Registered fund · May 31, 2026 SCHWAB STRATEGIC TRUST, not summed	262,092	0.14%	+25,428	May 31, 2026	SCHWAB STRATEGIC TRUST, not summed
26.3	Schwab U.S. Large-Cap ETF Fund S000026632 · Registered fund · May 31, 2026 SCHWAB STRATEGIC TRUST, not summed	129,543	0.07%	+2,794	May 31, 2026	SCHWAB STRATEGIC TRUST, not summed
26.4	Schwab Total Stock Market Index Fund Fund S000005913 · Registered fund · Jul 31, 2026 SCHWAB CAPITAL TRUST, not summed	88,939	0.05%	+16,387	Jul 31, 2026	SCHWAB CAPITAL TRUST, not summed
26.5	Schwab U.S. Broad Market ETF Fund S000026631 · Registered fund · May 31, 2026 SCHWAB STRATEGIC TRUST, not summed	72,898	0.04%	+958	May 31, 2026	SCHWAB STRATEGIC TRUST, not summed
27	CANTOR FITZGERALD, L. P. 13F CIK 1024896 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	1,091,138	0.59%	+606,597	Jun 30, 2026	carried, not yet filed for the newest quarter
28	MARSHALL WACE, LLP 13F CIK 1318757 · Exempt reporting adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,066,394	0.57%	+1,066,394	Jun 30, 2026	carried, not yet filed for the newest quarter
29	VANGUARD FIDUCIARY TRUST CO 13F CIK 933478 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	880,052	0.47%	+59,422	Jun 30, 2026	carried, not yet filed for the newest quarter
30	NORTHERN TRUST CORP 13F CIK 73124 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	716,383	0.39%	-436,683	Jun 30, 2026	carried, not yet filed for the newest quarter
30.1	FlexShares Morningstar US Market Factor Tilt Index Fund Fund S000033312 · Registered fund · Jul 31, 2026 FlexShares Trust, not summed	6,952	0.00%	—	Jul 31, 2026	FlexShares Trust, not summed
31	SUSQUEHANNA INTERNATIONAL GROUP, LLP 13F CIK 1446194 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	678,175	0.36%	+12,196	Jun 30, 2026	carried, not yet filed for the newest quarter
32	BANK OF MONTREAL /CAN/ 13F CIK 927971 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	677,701	0.36%	+140,531	Jun 30, 2026	carried, not yet filed for the newest quarter
33	LPL Financial LLC 13F CIK 1403438 · Broker-dealer · Jun 30, 2026 carried, not yet filed for the newest quarter	629,015	0.34%	+95,064	Jun 30, 2026	carried, not yet filed for the newest quarter
34	VANGUARD RUSSELL 2000 INDEX FUND Fund S000030003 · Registered fund · May 31, 2026 VANGUARD SCOTTSDALE FUNDS, not summed	627,195	0.34%	+88,404	May 31, 2026	VANGUARD SCOTTSDALE FUNDS, not summed
35	VANGUARD UTILITIES INDEX FUND Fund S000004445 · Registered fund · May 31, 2026 VANGUARD WORLD FUND, not summed	614,588	0.33%	-138,869	May 31, 2026	VANGUARD WORLD FUND, not summed
36	Renner Alexandra Insider CIK 2147680 · Oct 14, 2026 Chief Product Officer, issuer-wide, not summed	594,818	0.32%	+833	Oct 14, 2026	Chief Product Officer, issuer-wide, not summed
37	BANK OF AMERICA CORP /DE/ 13F CIK 70858 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	592,471	0.32%	-27,810	Jun 30, 2026	carried, not yet filed for the newest quarter
38	PORTLAND INVESTMENT COUNSEL INC. 13F CIK 1081668 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	589,480	0.32%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
39	M. Klein Associates, Inc. 13G CIK 1849019 · Unknown · Dec 31, 2024 Rule 13d-1(d), exempt investor	500,000	0.27%	—	Dec 31, 2024	Rule 13d-1(d), exempt investor
40	Bank of New York Mellon Corp 13F CIK 1390777 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	468,802	0.25%	-48,084	Jun 30, 2026	carried, not yet filed for the newest quarter
40.1	BNY Mellon US Mid Cap Core Equity ETF Fund S000067261 · Registered fund · Jul 31, 2026 BNY Mellon ETF Trust, not summed	24,128	0.01%	+5,300	Jul 31, 2026	BNY Mellon ETF Trust, not summed
41	Bealmear Richard Craig Insider CIK 1855623 · Oct 2, 2026 Chief Financial Officer, issuer-wide, not summed	467,261	0.25%	+5,619	Oct 2, 2026	Chief Financial Officer, issuer-wide, not summed
42	WELLS FARGO & COMPANY/MN 13F CIK 72971 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	434,127	0.23%	+82,400	Jun 30, 2026	carried, not yet filed for the newest quarter
43	RAYMOND JAMES FINANCIAL INC 13F CIK 720005 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	398,843	0.21%	+45,039	Jun 30, 2026	carried, not yet filed for the newest quarter
44	UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 13F CIK 861177 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	393,729	0.21%	-57,551	Jun 30, 2026	carried, not yet filed for the newest quarter
45	ARK Investment Management LLC 13F CIK 1697748 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	372,257	0.20%	+21,088	Jun 30, 2026	carried, not yet filed for the newest quarter
45.1	ARK Autonomous Technology & Robotics ETF Fund S000042976 · Registered fund · Jul 31, 2026 ARK ETF Trust, not summed	458,417	0.25%	+93,958	Jul 31, 2026	ARK ETF Trust, not summed
46	Millennium Management LLC 13G CIK 1487118 · Unknown · Sep 30, 2024 Rule 13d-1(c), passive investor	365,261	0.20%	—	Sep 30, 2024	Rule 13d-1(c), passive investor
47	Hanson John Insider CIK 2146828 · Oct 13, 2026 Chief of Staff, issuer-wide, not summed	362,311	0.19%	+961	Oct 13, 2026	Chief of Staff, issuer-wide, not summed
48	Mirae Asset Global Investments Co., Ltd. 13F CIK 1569395 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	352,541	0.19%	+21,150	Jun 30, 2026	carried, not yet filed for the newest quarter
49	EXCHANGE TRADED CONCEPTS, LLC 13F CIK 1457320 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	310,563	0.17%	+11,568	Jun 30, 2026	carried, not yet filed for the newest quarter
49.1	Range Nuclear Renaissance Index ETF Fund S000083243 · Registered fund · May 31, 2026 EXCHANGE TRADED CONCEPTS TRUST, not summed	306,753	0.16%	+51,377	May 31, 2026	EXCHANGE TRADED CONCEPTS TRUST, not summed
50	Wedbush Fund Advisers, LLC 13F CIK 2070852 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	292,072	0.16%	+61,556	Jun 30, 2026	carried, not yet filed for the newest quarter
50.1	Dan IVES Wedbush AI Revolution ETF Fund S000091902 · Registered fund · Jul 31, 2026 Wedbush Series Trust, not summed	308,555	0.17%	+78,799	Jul 31, 2026	Wedbush Series Trust, not summed

28 more nested rows are not shown here; Every filing lists them all.

Shares are restated onto today's split basis. Change compares each row with the same holder's previous filing in the same source; a dash means there is none to compare. Nested 13D/G, insider and fund rows are not summed, since a 13F report already holds them.

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Key facts CIK 1849056 CUSIP 02156V109 13F (30d) 131 filings 128 filers Visit website Investor relations