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RCUS in the 13F filings

Arcus Biosciences Inc · CUSIP 03969F109

Sector · Pharmaceuticals and biotechnologyTheme · Healthcare: biopharma and medtech· L3VLUP-definedTheme · Pharmaceutical preparations
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
18 May 2026
latest of these filings; the earliest 12 May 2026
Managers listing it
25
at least, of 95 tracked, among listed positions
Comparable managers
91
filed both Q4 2025 and Q1 2026; 6 listed it in both
Shares listed
20,012,776
combined, among listed positions
Reported value
$433m
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 9 sellers (trimmed or exited), at least, among listed positions. Their net change in shares was -255,343.

Managers listing RCUS 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.

25 of 25 holders

ActionFiling
Wellington Management Group LLP6,089,516$132munder 0.1%Added+905,00715 May 2026 (the filing on sec.gov)
Woodline Partners LP3,777,798$82m0.31%Added+8,01015 May 2026 (the filing on sec.gov)
Marshall Wace LLP3,761,437$81m0.08%Added+373,64315 May 2026 (the filing on sec.gov)
Citadel Advisors LLC1,329,935$29munder 0.1%Added+1,225,23415 May 2026 (the filing on sec.gov)
Fidelity (FMR LLC)1,165,252$25munder 0.1%Added+30,07415 May 2026 (the filing on sec.gov)
Invesco Ltd820,820$18munder 0.1%Added+406,45512 May 2026 (the filing on sec.gov)
Renaissance Technologies LLC424,700$9.2munder 0.1%Added+392,00014 May 2026 (the filing on sec.gov)
PDT Partners LLC388,338$8.4m0.50%Held015 May 2026 (the filing on sec.gov)
Hudson Bay Capital Management LP356,535$7.7munder 0.1%Added+116,53513 May 2026 (the filing on sec.gov)
Two Sigma Investments LP312,690$6.8munder 0.1%Added+173,05915 May 2026 (the filing on sec.gov)
D. E. Shaw & Co.259,400$5.6munder 0.1%Added+173,83015 May 2026 (the filing on sec.gov)
Tudor Investment Corp216,311$4.7munder 0.1%Added+7,67215 May 2026 (the filing on sec.gov)
Schonfeld Strategic Advisors LLC193,561$4.2munder 0.1%Added+96,27815 May 2026 (the filing on sec.gov)
Susquehanna International Group LLP143,371$3.1munder 0.1%Trimmed-198,49415 May 2026 (the filing on sec.gov)
AllianceBernstein LP124,085$3.0munder 0.1%Trimmed-9,01315 May 2026 (the filing on sec.gov)
Point72 Asset Management LP129,273$2.8munder 0.1%Trimmed-3,150,72715 May 2026 (the filing on sec.gov)
Jane Street Group LLC107,979$2.3munder 0.1%Added+61,47412 May 2026 (the filing on sec.gov)
AQR Capital Management LLC86,294$1.9munder 0.1%Added+8715 May 2026 (the filing on sec.gov)
Man Group PLC80,866$1.7munder 0.1%Newnew15 May 2026 (the filing on sec.gov)
T. Rowe Price Associates Inc75,816$1.6munder 0.1%Added+17,16715 May 2026 (the filing on sec.gov)
Squarepoint Ops LLC66,674$1.4munder 0.1%Newnew15 May 2026 (the filing on sec.gov)
Janus Henderson Group Ltd42,338$916kunder 0.1%Held018 May 2026 (the filing on sec.gov)
Winton Group Ltd32,820$709kunder 0.1%Trimmed-29,43112 May 2026 (the filing on sec.gov)
MFS Investment Management22,617$489kunder 0.1%Trimmed-59914 May 2026 (the filing on sec.gov)
Acadian Asset Management LLC4,350$93kunder 0.1%Newnew13 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.

New (3)

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 5 in Q2 2026

Tracked managers listing it, at least.

0246820182020202120222023202420252026
the quarter shown share split complete books; unmarked quarters rest on listed positionsClick a quarter to open it.
RCUS by quarter
QuarterHoldersReported valueBuyersSellers
Q1 20182$716kn.a.n.a.
Q2 20191$133kn.a.n.a.
Q3 20191$210kn.a.n.a.
Q1 20202$5.2mn.a.n.a.
Q2 20208$51mn.a.n.a.
Q3 20204$12mn.a.n.a.
Q4 20202$14mn.a.n.a.
Q1 20212$48mn.a.n.a.
Q2 20212$48mn.a.n.a.
Q3 20211$59mn.a.n.a.
Q4 20213$81mn.a.n.a.
Q1 20221$8.3mn.a.n.a.
Q2 20221$3.8mn.a.n.a.
Q3 20221$1.5mn.a.n.a.
Q4 20222$26mn.a.n.a.
Q1 20235$28mn.a.n.a.
Q2 20236$69mn.a.n.a.
Q3 20232$23mn.a.n.a.
Q4 20234$27m21
Q1 20245$97m41
Q2 20244$95m22
Q3 20245$103m41
Q4 20244$85m31
Q1 20254$64m31
Q2 20253$84m21
Q3 20254$117m13
Q4 20256$265m1218
Q1 20265$310m189
Q2 20265$346m1315

Compare with…

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

RCUS and LLY →RCUS and JNJ →RCUS and VRTX →Choose a stock to compare with RCUS →

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