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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
30 Jun 2026
the date the book describes
Filed
27 Oct 2026
latest of these filings; the earliest 3 Aug 2026
Managers listing it
27
at least, of 95 tracked, among listed positions
Comparable managers
91
filed both Q1 2026 and Q2 2026; 4 listed it in both
Shares listed
5,164,687
combined, among listed positions
Reported value
$270m
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: 18 buyers (opened or added shares) and 13 sellers (trimmed or exited), at least, among listed positions. Their net change in shares was +981,590.

Managers listing OKLO in Q2 2026

Share of 13F value is the position’s reported value over everything the manager reported that quarter. The share change is against Q1 2026, and only where both filings list the position. A rise in value with no rise in shares is the price, not buying.

27 of 27 holders

ActionFiling
Jane Street Group LLC1,269,146$66munder 0.1%Added+736,14614 Aug 2026 (the filing on sec.gov)
Marshall Wace LLP1,066,394$56munder 0.1%Newnew13 Aug 2026 (the filing on sec.gov)
Susquehanna International Group LLP678,175$35munder 0.1%Added+12,19614 Aug 2026 (the filing on sec.gov)
ARK Investment Management LLC372,257$19m0.13%Added+21,08814 Aug 2026 (the filing on sec.gov)
Fidelity (FMR LLC)283,221$15munder 0.1%Added+83,54813 Aug 2026 (the filing on sec.gov)
Millennium Management LLC278,978$15munder 0.1%Added+222,10214 Aug 2026 (the filing on sec.gov)
T. Rowe Price Associates Inc143,827$7.5munder 0.1%Added+2,53414 Aug 2026 (the filing on sec.gov)
Freestone Grove Partners LP116,383$6.1munder 0.1%Added+62,65114 Aug 2026 (the filing on sec.gov)
Invesco Ltd113,178$5.9munder 0.1%Trimmed-17,33814 Aug 2026 (the filing on sec.gov)
Winton Group Ltd97,300$5.1m0.16%Trimmed-37,0797 Aug 2026 (the filing on sec.gov)
Balyasny Asset Management LLC84,965$4.4munder 0.1%Added+52,20614 Aug 2026 (the filing on sec.gov)
Brevan Howard Capital Management LP81,610$4.3munder 0.1%Added+73,26414 Aug 2026 (the filing on sec.gov)
Squarepoint Ops LLC73,779$3.9munder 0.1%Added+45,59314 Aug 2026 (the filing on sec.gov)
Two Sigma Investments LP72,538$3.8munder 0.1%Trimmed-87,77914 Aug 2026 (the filing on sec.gov)
Holocene Advisors LP66,859$3.5munder 0.1%Added+21,42414 Aug 2026 (the filing on sec.gov)
Janus Henderson Group Ltd63,800$3.3munder 0.1%Newnew14 Aug 2026 (the filing on sec.gov)
Bridgewater Associates LP56,194$2.9munder 0.1%Added+1,23814 Aug 2026 (the filing on sec.gov)
AllianceBernstein LP47,697$2.4munder 0.1%Trimmed-88,39714 Aug 2026 (the filing on sec.gov)
Neuberger Berman Group LLC32,215$1.7munder 0.1%Trimmed-2,33127 Oct 2026 (the filing on sec.gov)
AQR Capital Management LLC31,554$1.7munder 0.1%Added+6,80514 Aug 2026 (the filing on sec.gov)
Citadel Advisors LLC28,281$1.5munder 0.1%Trimmed-221,3952 Sep 2026 (the filing on sec.gov)
Schonfeld Strategic Advisors LLC25,662$1.3munder 0.1%Newnew14 Aug 2026 (the filing on sec.gov)
Man Group PLC22,553$1.2munder 0.1%Trimmed-187,20514 Aug 2026 (the filing on sec.gov)
Quantbot Technologies LP21,701$1.1munder 0.1%Trimmed-107,44212 Aug 2026 (the filing on sec.gov)
Hudson Bay Capital Management LP19,775$1.0munder 0.1%Newnew14 Aug 2026 (the filing on sec.gov)
Page 1 of 2

Largest increases and reductions, by shares

Q1 2026 to Q2 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 (5)

Exited (4)

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 →