L3VLUP
Quarter end
31 Mar 2026
the date the book describes
Filed
18 May 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; 3 listed it in both
Shares listed
18,358,557
combined, among listed positions
Reported value
$264m
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: 21 buyers (opened or added shares) and 10 sellers (trimmed or exited), at least, among listed positions. Their net change in shares was +3,456,216.

Managers listing PUMP 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.4,743,553$68munder 0.1%Added+925,28015 May 2026 (the filing on sec.gov)
Arrowstreet Capital LP3,449,379$50munder 0.1%Added+316,02214 May 2026 (the filing on sec.gov)
Millennium Management LLC1,552,869$22munder 0.1%Added+939,94915 May 2026 (the filing on sec.gov)
Citadel Advisors LLC1,425,681$21munder 0.1%Trimmed-215,59815 May 2026 (the filing on sec.gov)
Jane Street Group LLC1,144,720$16munder 0.1%Trimmed-179,18012 May 2026 (the filing on sec.gov)
Two Sigma Investments LP945,030$14munder 0.1%Added+109,52215 May 2026 (the filing on sec.gov)
Invesco Ltd876,914$13munder 0.1%Added+469,88312 May 2026 (the filing on sec.gov)
Renaissance Technologies LLC652,400$9.4munder 0.1%Trimmed-6,70014 May 2026 (the filing on sec.gov)
First Eagle Investment Management LLC517,833$7.5munder 0.1%Added+30,50014 May 2026 (the filing on sec.gov)
Tudor Investment Corp507,253$7.3munder 0.1%Trimmed-108,96315 May 2026 (the filing on sec.gov)
Fidelity (FMR LLC)476,018$6.9munder 0.1%Added+210,65615 May 2026 (the filing on sec.gov)
Balyasny Asset Management LLC350,478$5.0munder 0.1%Newnew15 May 2026 (the filing on sec.gov)
Squarepoint Ops LLC344,007$5.0munder 0.1%Added+326,22915 May 2026 (the filing on sec.gov)
Wellington Management Group LLP233,166$3.4munder 0.1%Newnew15 May 2026 (the filing on sec.gov)
PDT Partners LLC175,924$2.5m0.15%Held015 May 2026 (the filing on sec.gov)
AQR Capital Management LLC134,557$1.9munder 0.1%Added+26,63215 May 2026 (the filing on sec.gov)
Hudson Bay Capital Management LP100,000$1.4munder 0.1%Newnew13 May 2026 (the filing on sec.gov)
Acadian Asset Management LLC97,469$1.4munder 0.1%Added+57,52313 May 2026 (the filing on sec.gov)
Caxton Associates LLP96,048$1.4munder 0.1%Added+34,16214 May 2026 (the filing on sec.gov)
T. Rowe Price Associates Inc87,788$1.3munder 0.1%Added+23,70215 May 2026 (the filing on sec.gov)
Winton Group Ltd67,762$976kunder 0.1%Added+33,33012 May 2026 (the filing on sec.gov)
Brevan Howard Capital Management LP66,929$964kunder 0.1%Added+7,24415 May 2026 (the filing on sec.gov)
Susquehanna International Group LLP58,981$850kunder 0.1%Added+8,68515 May 2026 (the filing on sec.gov)
AllianceBernstein LP85,900$817kunder 0.1%Held015 May 2026 (the filing on sec.gov)
ExodusPoint Capital Management LP53,916$777kunder 0.1%Newnew14 May 2026 (the filing on sec.gov)
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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.
1 in Q3 2024 to 3 in Q2 2026

Tracked managers listing it, at least.

02462017201920222023202420252026
the quarter shown share split complete books; unmarked quarters rest on listed positionsClick a quarter to open it.
PUMP by quarter
QuarterHoldersReported valueBuyersSellers
Q1 20174$52mn.a.n.a.
Q2 20171$35mn.a.n.a.
Q3 20172$26mn.a.n.a.
Q4 20172$95mn.a.n.a.
Q3 20184$264mn.a.n.a.
Q4 20183$177mn.a.n.a.
Q1 20195$264mn.a.n.a.
Q2 20193$150mn.a.n.a.
Q3 20193$11mn.a.n.a.
Q4 20191$3.2mn.a.n.a.
Q2 20202$2.0mn.a.n.a.
Q3 20201$146kn.a.n.a.
Q3 20211$108kn.a.n.a.
Q1 20221$1.9mn.a.n.a.
Q2 20221$2.2mn.a.n.a.
Q3 20221$3.0mn.a.n.a.
Q4 20221$4.0mn.a.n.a.
Q1 20231$4.5mn.a.n.a.
Q2 20232$7.2mn.a.n.a.
Q3 20232$6.6mn.a.n.a.
Q4 20231$4.0m02
Q1 20241$3.9m10
Q2 20242$10m20
Q3 20241$3.3m01
Q4 20242$4.3m11
Q1 20252$4.5m20
Q2 20252$3.8m11
Q3 20252$3.3m01
Q4 20253$6.9m1615
Q1 20264$61m2110
Q2 20263$23m2313

Compare with…

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

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

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