What does CUSIP 02156V109 represent in this 13F holders report?

CUSIP 02156V109 is the security identifier for OKLO - Oklo Inc. - Class A Stock used to aggregate holder disclosures.

How many institutions held OKLO - Oklo Inc. - Class A Stock in Q3 2025?

633 institutional investors reported OKLO - Oklo Inc. - Class A Stock for Q3 2025. Use the holders table for investor-level position and value details.

Oklo Inc. - Class A Stock (OKLO)

CUSIP: 02156V109

Q3 2025 13F Holders as of 30 Sep 2025

Security type / class: Equity / Class A Stock
Total 13F shares: 64,821,474
Total 13F value: $7,231,826,607
Share change: +10,315,967
Put/Call ratio: 88%
SEC-reported price per share: $111.63
Number of holders: 633
Value change: +$1,392,276,072
Number of buys: 428
Number of sells: 213
Shares outstanding: 172,932,917

Security key

02156V109

Report period

Q3 2025

Institutions

633

Top holders

OKLO full security history Ownership snapshot Full 13F holder table Oklo Inc. SEC filings Oklo Inc. company facts

Broader feeds

Latest 13F filings Latest 13D/G filings Investors directory

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

30 Sep 2025

13D/G 13F 3/4/5 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%

Michael Stuart Klein 0.09%

BlackRock, Inc. 4.2%

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 13F The Vanguard Group · Company 13D/G 13F	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 13D/G 3/4/5	4.8%	$162,535,825 6,650,402 shares	-$81,084,026	06 Mar 2025
Data Collective IV, L.P.	13D/G Matthew Ocko 13D/G	4.4%	$131,541,335 5,382,215 shares	$0	31 Dec 2024
Michael Stuart Klein	3/4/5 Director, 10%+ Owner 3/4/5	0.09%	$20,280,000 150,000 shares	-$6,687,912	22 Sep 2025
BlackRock, Inc.	13F Company 13F	4.2%	$409,702,345 7,317,420 shares	—	30 Jun 2025
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.	13F Company 13F	2.4%	$231,420,835 4,133,253 shares	—	30 Jun 2025

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 Q3 2025

Investor-level positions for this CUSIP, loaded as an interactive table.

Institutions

633

64,821,474

Rows available

633

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 Q3 2025 vs Q2 2025 Across Filers

Q2 2025 holders

471

Q3 2025 holders

633

Holder diff

162

Investor	Q2 2025 Shares	Q3 2025 Shares	Share Diff	Share Chg %	Q2 2025 value	Q3 2025 value	Value change	Value Chg %