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OKLO in the 13F filings

Oklo Inc · CUSIP 02156V109

Sector · UtilitiesTheme · Electric utilitiesTheme · Energy and power infrastructure· L3VLUP-defined
Quarter
Q2 2026Q1 2026Q4 2025Q3 2025Q2 2025Q1 2025Q4 2024Q3 2024Q2 2024Q1 2024Q4 2023Q3 2023
Quarter end
31 Mar 2026
the date the book describes
Filed
27 Oct 2026
latest of these filings; the earliest 12 May 2026
Managers listing it
26
at least, of 95 tracked, among listed positions
Comparable managers
91
filed both Q4 2025 and Q1 2026; 5 listed it in both
Shares listed
4,183,097
combined, among listed positions
Reported value
$210m
combined, at the quarter end

AllianceBernstein LP. Values in this filing are at the previous quarter end's prices; its share count is the quarter end's.

Among the 91 comparable managers: 20 buyers (opened or added shares) and 12 sellers (trimmed or exited), at least, among listed positions. Their net change in shares was +1,247,398.

Managers listing OKLO in Q1 2026

Share of 13F value is the position’s reported value over everything the manager reported that quarter. The share change is against Q4 2025, and only where both filings list the position. A rise in value with no rise in shares is the price, not buying.

26 of 26 holders

ActionFiling
Susquehanna International Group LLP665,979$33munder 0.1%Added+628,97715 May 2026 (the filing on sec.gov)
Capital World Investors537,354$27munder 0.1%Added+31,41613 May 2026 (the filing on sec.gov)
Jane Street Group LLC533,000$26munder 0.1%Newnew12 May 2026 (the filing on sec.gov)
ARK Investment Management LLC351,169$17m0.14%Added+128,12412 May 2026 (the filing on sec.gov)
Citadel Advisors LLC249,676$12munder 0.1%Added+31,20415 May 2026 (the filing on sec.gov)
Man Group PLC209,758$10munder 0.1%Trimmed-127,08315 May 2026 (the filing on sec.gov)
Fidelity (FMR LLC)199,673$9.9munder 0.1%Trimmed-64,56015 May 2026 (the filing on sec.gov)
AllianceBernstein LP136,094$9.8munder 0.1%Added+13,09615 May 2026 (the filing on sec.gov)
Tudor Investment Corp181,899$9.0munder 0.1%Newnew15 May 2026 (the filing on sec.gov)
Two Sigma Investments LP160,317$8.0munder 0.1%Added+55,45615 May 2026 (the filing on sec.gov)
T. Rowe Price Associates Inc141,293$7.0munder 0.1%Added+33,42715 May 2026 (the filing on sec.gov)
Winton Group Ltd134,379$6.7m0.23%Added+115,37912 May 2026 (the filing on sec.gov)
Invesco Ltd130,516$6.5munder 0.1%Added+16,91912 May 2026 (the filing on sec.gov)
Quantbot Technologies LP129,143$6.4m0.26%Trimmed-105,63313 May 2026 (the filing on sec.gov)
Millennium Management LLC56,876$2.8munder 0.1%Added+5,88415 May 2026 (the filing on sec.gov)
Wellington Management Group LLP56,646$2.8munder 0.1%Trimmed-197,65415 May 2026 (the filing on sec.gov)
Bridgewater Associates LP54,956$2.7munder 0.1%Added+8,12015 May 2026 (the filing on sec.gov)
Freestone Grove Partners LP53,732$2.7munder 0.1%Newnew15 May 2026 (the filing on sec.gov)
Holocene Advisors LP45,435$2.3munder 0.1%Newnew15 May 2026 (the filing on sec.gov)
Neuberger Berman Group LLC34,546$1.7munder 0.1%Added+1,52227 Oct 2026 (the filing on sec.gov)
Balyasny Asset Management LLC32,759$1.6munder 0.1%Trimmed-37,23115 May 2026 (the filing on sec.gov)
Squarepoint Ops LLC28,186$1.4munder 0.1%Added+33015 May 2026 (the filing on sec.gov)
AQR Capital Management LLC24,749$1.2munder 0.1%Trimmed-10,74915 May 2026 (the filing on sec.gov)
Walleye Capital LLC22,283$1.1munder 0.1%Added+1,74013 May 2026 (the filing on sec.gov)
Brevan Howard Capital Management LP8,346$414kunder 0.1%Newnew15 May 2026 (the filing on sec.gov)
Page 1 of 2

Largest increases and reductions, by shares

Q4 2025 to Q1 2026, among managers that listed it in both quarters or opened it.

Increases

Reductions

New positions and exits

At least these many: a manager is shown exiting only where its own filing shows the position gone.

New (6)

Exited (6)

Ownership over time

Every quarter on file. A quarter-end value moves with the price as well as with the shares held; buyers and sellers count comparable managers, by shares.
5 in Q3 2024 to 6 in Q2 2026

Tracked managers listing it, at least.

0246820222023202420252026
the quarter shown share split complete books; unmarked quarters rest on listed positionsClick a quarter to open it.
OKLO by quarter
QuarterHoldersReported valueBuyersSellers
Q3 20216$83mn.a.n.a.
Q4 20216$74mn.a.n.a.
Q1 20226$73mn.a.n.a.
Q2 20226$72mn.a.n.a.
Q3 20227$95mn.a.n.a.
Q4 20227$81mn.a.n.a.
Q1 20237$92mn.a.n.a.
Q2 20235$75mn.a.n.a.
Q3 20233$48mn.a.n.a.
Q4 20232$38m02
Q1 20242$41m00
Q2 20243$29m11
Q3 20245$37m20
Q4 20243$75m03
Q1 20251$6.2m03
Q2 20256$196m51
Q3 20252$71m12
Q4 20256$97m1712
Q1 20264$33m2012
Q2 20266$94m1813

Compare with…

Holders over time, buyers and sellers, and the managers holding both, side by side for up to four stocks.

OKLO and SO →OKLO and D →OKLO and NEE →Choose a stock to compare with OKLO →

How much of the picture this is

A 13F is a manager’s long US-listed equity book at a quarter end, filed up to 45 days later. It shows no shorts, cash, bonds or performance, and it is never today’s portfolio. Large books are listed to their largest positions, so a manager missing from this table may still hold a small position below that line. These are 95 tracked managers, not the institutional market.

Which funds own OKLO, latest filings →Back to the 13F Explorer →