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CLDX in the 13F filings

Celldex Therapeutics Inc New · CUSIP 15117B202

Sector · Pharmaceuticals and biotechnologyTheme · Healthcare: biopharma and medtech· L3VLUP-defined
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
21
at least, of 95 tracked, among listed positions
Comparable managers
91
filed both Q4 2025 and Q1 2026; 4 listed it in both
Shares listed
20,326,968
combined, among listed positions
Reported value
$644m
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: 15 buyers (opened or added shares) and 3 sellers (trimmed or exited), at least, among listed positions. Their net change in shares was +1,107,257.

Managers listing CLDX 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.

21 of 21 holders

ActionFiling
Wellington Management Group LLP8,560,476$272m0.05%Added+480,86815 May 2026 (the filing on sec.gov)
Fidelity (FMR LLC)3,749,048$119munder 0.1%Trimmed-1,158,42115 May 2026 (the filing on sec.gov)
Point72 Asset Management LP3,229,939$102m0.13%Added+1,471,58215 May 2026 (the filing on sec.gov)
T. Rowe Price Associates Inc2,086,332$66munder 0.1%Added+46,62715 May 2026 (the filing on sec.gov)
Millennium Management LLC1,253,532$40munder 0.1%Added+40,82715 May 2026 (the filing on sec.gov)
Woodline Partners LP500,127$16m0.06%Held015 May 2026 (the filing on sec.gov)
Citadel Advisors LLC200,612$6.4munder 0.1%Added+145,51115 May 2026 (the filing on sec.gov)
Two Sigma Investments LP137,015$4.3munder 0.1%Added+4,48215 May 2026 (the filing on sec.gov)
PDT Partners LLC97,822$3.1m0.18%Held015 May 2026 (the filing on sec.gov)
Invesco Ltd93,684$3.0munder 0.1%Added+3,54012 May 2026 (the filing on sec.gov)
Jane Street Group LLC90,321$2.9munder 0.1%Newnew12 May 2026 (the filing on sec.gov)
Balyasny Asset Management LLC85,026$2.7munder 0.1%Newnew15 May 2026 (the filing on sec.gov)
AllianceBernstein LP65,540$1.8munder 0.1%Held015 May 2026 (the filing on sec.gov)
D. E. Shaw & Co.52,860$1.7munder 0.1%Trimmed-83,46415 May 2026 (the filing on sec.gov)
Susquehanna International Group LLP35,948$1.1munder 0.1%Newnew15 May 2026 (the filing on sec.gov)
Tudor Investment Corp35,393$1.1munder 0.1%Newnew15 May 2026 (the filing on sec.gov)
Janus Henderson Group Ltd25,642$814kunder 0.1%Held018 May 2026 (the filing on sec.gov)
Brevan Howard Capital Management LP9,255$294kunder 0.1%Newnew15 May 2026 (the filing on sec.gov)
Walleye Capital LLC8,147$258kunder 0.1%Newnew13 May 2026 (the filing on sec.gov)
AQR Capital Management LLC7,777$247kunder 0.1%Newnew15 May 2026 (the filing on sec.gov)
Quantbot Technologies LP2,472$78kunder 0.1%Added+2,32613 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 (7)

Exited (1)

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.

0246202120222023202420252026
the quarter shown share split complete books; unmarked quarters rest on listed positionsClick a quarter to open it.
CLDX by quarter
QuarterHoldersReported valueBuyersSellers
Q3 20201$2.5mn.a.n.a.
Q4 20203$7.7mn.a.n.a.
Q1 20212$5.5mn.a.n.a.
Q3 20211$41mn.a.n.a.
Q4 20213$40mn.a.n.a.
Q1 20223$83mn.a.n.a.
Q2 20223$65mn.a.n.a.
Q3 20222$5.7mn.a.n.a.
Q4 20225$265mn.a.n.a.
Q1 20232$152mn.a.n.a.
Q2 20233$216mn.a.n.a.
Q3 20233$189mn.a.n.a.
Q4 20234$432m40
Q1 20244$444m22
Q2 20244$450m40
Q3 20243$447m21
Q4 20243$341m12
Q1 20253$221m12
Q2 20253$90m30
Q3 20253$253m20
Q4 20254$283m513
Q1 20264$393m153
Q2 20263$384m1112

Compare with…

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

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

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