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
22
at least, of 95 tracked, among listed positions
Comparable managers
91
filed both Q4 2025 and Q1 2026; 2 listed it in both
Shares listed
2,301,485
combined, among listed positions
Reported value
$121m
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: 10 buyers (opened or added shares) and 16 sellers (trimmed or exited), at least, among listed positions. Their net change in shares was -262,566.

Managers listing GBX 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.

22 of 22 holders

ActionFiling
D. E. Shaw & Co.639,913$34munder 0.1%Added+88,15115 May 2026 (the filing on sec.gov)
Balyasny Asset Management LLC417,461$22munder 0.1%Added+74,10315 May 2026 (the filing on sec.gov)
Invesco Ltd250,016$13munder 0.1%Trimmed-7,62312 May 2026 (the filing on sec.gov)
Tudor Investment Corp232,215$12munder 0.1%Added+42,84915 May 2026 (the filing on sec.gov)
GAMCO Investors Inc147,200$7.8m0.08%Trimmed-2,00014 May 2026 (the filing on sec.gov)
AQR Capital Management LLC134,982$7.1munder 0.1%Trimmed-4,87015 May 2026 (the filing on sec.gov)
Jane Street Group LLC132,424$7.0munder 0.1%Added+13,41712 May 2026 (the filing on sec.gov)
Marshall Wace LLP64,246$3.4munder 0.1%Newnew15 May 2026 (the filing on sec.gov)
Citadel Advisors LLC63,823$3.4munder 0.1%Trimmed-26,60115 May 2026 (the filing on sec.gov)
Voloridge Investment Management LLC37,600$2.0munder 0.1%Trimmed-13,66115 May 2026 (the filing on sec.gov)
T. Rowe Price Associates Inc36,601$1.9munder 0.1%Added+4,57615 May 2026 (the filing on sec.gov)
Two Sigma Investments LP34,982$1.8munder 0.1%Added+21,24315 May 2026 (the filing on sec.gov)
AllianceBernstein LP29,193$1.4munder 0.1%Trimmed-5,53215 May 2026 (the filing on sec.gov)
Millennium Management LLC18,081$952kunder 0.1%Trimmed-199,07315 May 2026 (the filing on sec.gov)
Janus Henderson Group Ltd14,296$753kunder 0.1%Held018 May 2026 (the filing on sec.gov)
Susquehanna International Group LLP10,929$575kunder 0.1%Added+6,31115 May 2026 (the filing on sec.gov)
Squarepoint Ops LLC10,509$553kunder 0.1%Trimmed-65,85715 May 2026 (the filing on sec.gov)
Fidelity (FMR LLC)5,884$310kunder 0.1%Added+92415 May 2026 (the filing on sec.gov)
Schonfeld Strategic Advisors LLC5,689$300kunder 0.1%Trimmed-40,97215 May 2026 (the filing on sec.gov)
Neuberger Berman Group LLC5,465$288kunder 0.1%Added+13527 Oct 2026 (the filing on sec.gov)
Caxton Associates LLP5,181$273kunder 0.1%Trimmed-31,77414 May 2026 (the filing on sec.gov)
PDT Partners LLC4,795$252kunder 0.1%Held015 May 2026 (the filing on sec.gov)

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.

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.
3 in Q3 2024 to 3 in Q2 2026

Tracked managers listing it, at least.

024682014201620182020202220242026
the quarter shown share split complete books; unmarked quarters rest on listed positionsClick a quarter to open it.
GBX by quarter
QuarterHoldersReported valueBuyersSellers
Q2 20131$8.9mn.a.n.a.
Q3 20131$8.8mn.a.n.a.
Q4 20133$30mn.a.n.a.
Q1 20144$20mn.a.n.a.
Q2 20144$32mn.a.n.a.
Q3 20144$108mn.a.n.a.
Q4 20144$76mn.a.n.a.
Q1 20155$56mn.a.n.a.
Q2 20156$40mn.a.n.a.
Q3 20153$42mn.a.n.a.
Q4 20154$14mn.a.n.a.
Q1 20162$11mn.a.n.a.
Q2 20162$11mn.a.n.a.
Q3 20162$13mn.a.n.a.
Q4 20163$16mn.a.n.a.
Q1 20178$33mn.a.n.a.
Q2 20175$54mn.a.n.a.
Q3 20173$68mn.a.n.a.
Q4 20172$12mn.a.n.a.
Q1 20183$47mn.a.n.a.
Q2 20184$22mn.a.n.a.
Q3 20183$166mn.a.n.a.
Q4 20183$108mn.a.n.a.
Q1 20191$477kn.a.n.a.
Q2 20191$814kn.a.n.a.
Q4 20191$408kn.a.n.a.
Q1 20201$1.5mn.a.n.a.
Q2 20201$1.4mn.a.n.a.
Q3 20202$2.6mn.a.n.a.
Q4 20203$4.3mn.a.n.a.
Q1 20211$2.2mn.a.n.a.
Q2 20211$2.0mn.a.n.a.
Q3 20211$2.0mn.a.n.a.
Q4 20211$797kn.a.n.a.
Q1 20221$969kn.a.n.a.
Q2 20222$4.1mn.a.n.a.
Q3 20221$1.0mn.a.n.a.
Q4 20221$1.1mn.a.n.a.
Q1 20233$18mn.a.n.a.
Q2 20232$8.8mn.a.n.a.
Q3 20233$8.7mn.a.n.a.
Q4 20233$19m21
Q1 20244$39m31
Q2 20243$11m12
Q3 20243$9.5m03
Q4 20242$8.5m01
Q1 20254$11m31
Q2 20252$7.5m11
Q3 20252$8.2m20
Q4 20252$8.7m1516
Q1 20262$8.0m1016
Q2 20263$9.1m196

Compare with…

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

GBX and KLAC →GBX and GE →GBX and LRCX →Choose a stock to compare with GBX →

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