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JANE STREET GROUP, LLC

Position in NAMS — NewAmsterdam Pharma Co N.V.

CIK 1595888 NEW YORK, NY

Position in NAMS

as of Jun 30, 2026 · filed Aug 14, 2026
Position Value
$16,071,857
+$10,783,774 QoQ
Shares Held
474,236
+187.1% QoQ
Ownership
0.397%
of shares outstanding
% of Portfolio
0.01%
of 13F equity value
Holder Rank
#42
of 198 holders
Holding Since
Sep 2024
8 quarters on record
Voting authority Sole 100% Shared 0% None 0%

Common Shares in NAMS Over Time

Shares Held

Position Value (USD)

Derivatives in NAMS

reported options exposure · as of Jun 30, 2026
CallValue
$406,680
CallShares
12,000
PutValue
$247,397
PutShares
7,300

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 Jun 30, 2026

JANE STREET GROUP, LLC holds $1,364,050,815 across 292 Biotechnology names. NAMS ranks #19 (1.2% of the industry book) .

# Ticker Company Shares Value (USD) Open

All Filings in NAMS

Export CSV
16 filing rows on record
Report Date Value (USD) Shares
2026-06-30 $247,397 7,300
2026-06-30 $16,071,857 474,236
2026-06-30 $406,680 12,000
2026-03-31 $1,312,410 41,000
2026-03-31 $5,288,083 165,201
2026-03-31 $592,185 18,500
2025-12-31 $14,785,903 421,491
2025-12-31 $2,732,732 77,900
2025-12-31 $2,276,692 64,900
2025-09-30 $2,059,056 72,400
2025-06-30 $755,187 41,700
2025-03-31 $612,053 29,900
2025-03-31 $953,902 46,600
2024-12-31 $1,356,960 52,800
2024-12-31 $2,179,360 84,800
2024-09-30 $332,000 20,000