L3VLUP
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
29
at least, of 95 tracked, among listed positions
Comparable managers
91
filed both Q4 2025 and Q1 2026; 0 listed it in both
Shares listed
108,607,505
combined, among listed positions
Reported value
$301m
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: 22 buyers (opened or added shares) and 7 sellers (trimmed or exited), at least, among listed positions. Their net change in shares was +58,928,619.

Managers listing KOS 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.

29 of 29 holders

ActionFiling
D. E. Shaw & Co.20,385,745$57munder 0.1%Added+14,420,04215 May 2026 (the filing on sec.gov)
Two Sigma Investments LP18,680,328$52munder 0.1%Added+14,824,86115 May 2026 (the filing on sec.gov)
Millennium Management LLC12,632,904$35munder 0.1%Trimmed-2,195,06215 May 2026 (the filing on sec.gov)
Jane Street Group LLC11,743,115$33munder 0.1%Added+2,473,36212 May 2026 (the filing on sec.gov)
Invesco Ltd11,150,239$31munder 0.1%Added+9,279,33312 May 2026 (the filing on sec.gov)
Davidson Kempner Capital Management LP8,419,986$23m0.28%Newnew15 May 2026 (the filing on sec.gov)
Renaissance Technologies LLC5,339,638$15munder 0.1%Added+3,691,80014 May 2026 (the filing on sec.gov)
Citadel Advisors LLC4,450,077$12munder 0.1%Trimmed-1,106,17515 May 2026 (the filing on sec.gov)
Susquehanna International Group LLP2,347,639$6.5munder 0.1%Trimmed-108,81215 May 2026 (the filing on sec.gov)
Walleye Capital LLC2,314,477$6.4munder 0.1%Newnew13 May 2026 (the filing on sec.gov)
Point72 Asset Management LP1,964,598$5.5munder 0.1%Added+1,343,49215 May 2026 (the filing on sec.gov)
Arrowstreet Capital LP1,729,874$4.8munder 0.1%Newnew14 May 2026 (the filing on sec.gov)
AQR Capital Management LLC1,292,241$3.6munder 0.1%Added+755,91915 May 2026 (the filing on sec.gov)
Quantbot Technologies LP1,231,912$3.4m0.14%Newnew13 May 2026 (the filing on sec.gov)
ExodusPoint Capital Management LP1,096,323$3.0munder 0.1%Newnew14 May 2026 (the filing on sec.gov)
Caxton Associates LLP828,839$2.3m0.05%Added+343,20614 May 2026 (the filing on sec.gov)
Winton Group Ltd487,200$1.4munder 0.1%Newnew12 May 2026 (the filing on sec.gov)
Man Group PLC430,613$1.2munder 0.1%Added+276,46715 May 2026 (the filing on sec.gov)
Schonfeld Strategic Advisors LLC367,733$1.0munder 0.1%Newnew15 May 2026 (the filing on sec.gov)
T. Rowe Price Associates Inc344,462$958kunder 0.1%Added+64,09715 May 2026 (the filing on sec.gov)
Janus Henderson Group Ltd211,288$586kunder 0.1%Held018 May 2026 (the filing on sec.gov)
Marshall Wace LLP168,691$469kunder 0.1%Added+135,41915 May 2026 (the filing on sec.gov)
AllianceBernstein LP492,860$447kunder 0.1%Trimmed-18,50015 May 2026 (the filing on sec.gov)
Squarepoint Ops LLC150,723$419kunder 0.1%Trimmed-478,61915 May 2026 (the filing on sec.gov)
Brevan Howard Capital Management LP114,350$318kunder 0.1%Trimmed-31,34515 May 2026 (the filing on sec.gov)
Page 1 of 2

Largest increases and reductions, by shares

There is no earlier quarter on file to compare with.

Increases

Reductions

New positions and exits

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

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.
2 in Q2 2024 to 2 in Q2 2026

Tracked managers listing it, at least.

03581020192020202120222023202420252026
the quarter shown share split complete books; unmarked quarters rest on listed positionsClick a quarter to open it.
KOS by quarter
QuarterHoldersReported valueBuyersSellers
Q4 20185$183mn.a.n.a.
Q1 20196$744mn.a.n.a.
Q2 20197$825mn.a.n.a.
Q3 20195$589mn.a.n.a.
Q4 20199$548mn.a.n.a.
Q1 20201$186kn.a.n.a.
Q2 20202$6.5mn.a.n.a.
Q4 20201$1.1mn.a.n.a.
Q1 20211$1.1mn.a.n.a.
Q2 20211$1.1mn.a.n.a.
Q4 20211$55mn.a.n.a.
Q1 20225$247mn.a.n.a.
Q2 20228$626mn.a.n.a.
Q3 20229$474mn.a.n.a.
Q4 20225$553mn.a.n.a.
Q1 20237$719mn.a.n.a.
Q2 20235$180mn.a.n.a.
Q3 20234$725mn.a.n.a.
Q4 20236$608m42
Q1 20243$63m30
Q2 20242$29m12
Q3 20242$15m20
Q4 20241$4.2m11
Q1 20252$6.0m20
Q2 20252$5.2m20
Q3 20251$4.6m10
Q1 20265$82m227
Q2 20262$27m1613

Compare with…

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

KOS and GEV →KOS and XOM →KOS and CVX →Choose a stock to compare with KOS →

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 KOS, latest filings →Back to the 13F Explorer →