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Paradigm Biocapital Advisors LP

Position in ACLX — Arcellx, Inc.

CIK 1855655 NEW YORK, NY

Position in ACLX

as of Mar 31, 2026 · filed May 15, 2026
Position Value
$662,972,517
+$289,766,674 QoQ
Shares Held
5,774,016
+0.9% QoQ
Ownership
9.87%
of shares outstanding
% of Portfolio
13.55%
of 13F equity value
Holder Rank
not a current holder
Holding Since
Dec 2022
14 quarters on record
Voting authority Sole 100% Shared 0% None 0%

Common Shares in ACLX Over Time

Shares Held

Position Value (USD)

Derivatives in ACLX

reported options exposure · as of Sep 30, 2024
CallValue
$66,808,000
CallShares
800,000
PutValue
$0
PutShares
0

Notional value of option positions as reported on Form 13F. Calls and puts are disclosed separately and do not net against the common-share stake above.

Position in Biotechnology

Healthcare · as of Mar 31, 2026

Paradigm Biocapital Advisors LP holds $4,894,261,596 across 35 Biotechnology names. ACLX ranks #1 (13.5% of the industry book) .

# Ticker Company Shares Value (USD) Open
1 ACLX
Arcellx, Inc.
This page
5,774,016 $662,972,517

All Filings in ACLX

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15 filing rows on record
Report Date Value (USD) Shares
2026-03-31 $662,972,517 5,774,016
2025-12-31 $373,205,843 5,724,016
2025-09-30 $381,684,213 4,649,016
2025-06-30 $306,137,703 4,649,016
2025-03-31 $294,677,299 4,492,032
2024-12-31 $335,258,080 4,371,601
2024-09-30 $334,040,000 4,000,000
2024-09-30 $66,808,000 800,000
2024-06-30 $212,376,363 3,848,095
2024-03-31 $265,548,507 3,818,095
2023-12-31 $203,053,632 3,658,624
2023-09-30 $105,958,017 2,953,122
2023-06-30 $74,212,140 2,347,000
2023-03-31 $54,157,170 1,757,779
2022-12-31 $27,327,488 882,101