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ANAB in the 13F filings

Anaptysbio Inc · CUSIP 032724106

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
30 Jun 2026
the date the book describes
Filed
2 Sep 2026
latest of these filings; the earliest 3 Aug 2026
Managers listing it
23
at least, of 95 tracked, among listed positions
Comparable managers
91
filed both Q1 2026 and Q2 2026; 1 listed it in both
Shares listed
4,366,072
combined, among listed positions
Reported value
$294m
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: 12 buyers (opened or added shares) and 17 sellers (trimmed or exited), at least, among listed positions. Their net change in shares was +283,192.

Managers listing ANAB 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.

23 of 23 holders

ActionFiling
Millennium Management LLC807,316$54munder 0.1%Added+331,74414 Aug 2026 (the filing on sec.gov)
Woodline Partners LP717,014$48m0.15%Added+372,75814 Aug 2026 (the filing on sec.gov)
D. E. Shaw & Co.539,666$36munder 0.1%Trimmed-39,63014 Aug 2026 (the filing on sec.gov)
Arrowstreet Capital LP488,651$33munder 0.1%Trimmed-3,46913 Aug 2026 (the filing on sec.gov)
Citadel Advisors LLC394,373$27munder 0.1%Added+160,9232 Sep 2026 (the filing on sec.gov)
Squarepoint Ops LLC324,446$22munder 0.1%Added+56,74314 Aug 2026 (the filing on sec.gov)
Two Sigma Investments LP262,995$18munder 0.1%Trimmed-202,08814 Aug 2026 (the filing on sec.gov)
Fidelity (FMR LLC)240,511$16munder 0.1%Trimmed-232,19313 Aug 2026 (the filing on sec.gov)
Invesco Ltd202,056$14munder 0.1%Added+80,95314 Aug 2026 (the filing on sec.gov)
Renaissance Technologies LLC58,300$3.9munder 0.1%Trimmed-32,60013 Aug 2026 (the filing on sec.gov)
Voloridge Investment Management LLC57,555$3.9munder 0.1%Trimmed-21,39714 Aug 2026 (the filing on sec.gov)
AQR Capital Management LLC46,323$3.1munder 0.1%Added+13,85614 Aug 2026 (the filing on sec.gov)
Marshall Wace LLP43,822$3.0munder 0.1%Trimmed-24,22513 Aug 2026 (the filing on sec.gov)
Wellington Management Group LLP41,796$2.8munder 0.1%Trimmed-5,08514 Aug 2026 (the filing on sec.gov)
T. Rowe Price Associates Inc32,374$2.2munder 0.1%Added+2,68314 Aug 2026 (the filing on sec.gov)
AllianceBernstein LP32,820$1.8munder 0.1%Added+1,50014 Aug 2026 (the filing on sec.gov)
Tudor Investment Corp20,019$1.4munder 0.1%Added+15,05714 Aug 2026 (the filing on sec.gov)
MFS Investment Management15,870$1.1munder 0.1%Newnew3 Aug 2026 (the filing on sec.gov)
Brevan Howard Capital Management LP13,329$900kunder 0.1%Added+2,30114 Aug 2026 (the filing on sec.gov)
Acadian Asset Management LLC11,697$787kunder 0.1%Trimmed-1,52213 Aug 2026 (the filing on sec.gov)
Verition Fund Management LLC7,500$506kunder 0.1%Newnew14 Aug 2026 (the filing on sec.gov)
Janus Henderson Group Ltd7,464$504kunder 0.1%Held014 Aug 2026 (the filing on sec.gov)
Quantbot Technologies LP175$12kunder 0.1%Trimmed-38412 Aug 2026 (the filing on sec.gov)

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 (2)

Exited (7)

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 1 in Q2 2026

Tracked managers listing it, at least.

02468201820192020202120222023202420252026
the quarter shown share split complete books; unmarked quarters rest on listed positionsClick a quarter to open it.
ANAB by quarter
QuarterHoldersReported valueBuyersSellers
Q3 20171$8.6mn.a.n.a.
Q4 20175$544mn.a.n.a.
Q1 20188$673mn.a.n.a.
Q2 20184$271mn.a.n.a.
Q3 20186$860mn.a.n.a.
Q4 20185$579mn.a.n.a.
Q1 20196$670mn.a.n.a.
Q2 20195$350mn.a.n.a.
Q3 20195$190mn.a.n.a.
Q4 20192$2.4mn.a.n.a.
Q1 20203$3.7mn.a.n.a.
Q2 20202$6.2mn.a.n.a.
Q3 20201$948kn.a.n.a.
Q4 20202$17mn.a.n.a.
Q1 20211$9.2mn.a.n.a.
Q2 20211$14mn.a.n.a.
Q3 20212$32mn.a.n.a.
Q4 20213$31mn.a.n.a.
Q1 20222$53mn.a.n.a.
Q2 20222$36mn.a.n.a.
Q3 20222$93mn.a.n.a.
Q4 20222$86mn.a.n.a.
Q1 20232$47mn.a.n.a.
Q2 20232$51mn.a.n.a.
Q3 20233$17mn.a.n.a.
Q4 20234$45m22
Q1 20243$34m22
Q2 20241$6.3m01
Q3 20243$22m30
Q4 20241$6.4m12
Q1 20253$60m30
Q2 20253$67m12
Q3 20254$97m12
Q4 20254$137m1213
Q1 20262$20m1612
Q2 20261$48m1217

Compare with…

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

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

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