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Equibles

Rock Springs Capital Management LP

Position in ZLAB — Zai Lab Ltd

CIK 1595725 Baltimore, MD
Back to ZLAB Full portfolio

Position in ZLAB

as of Jun 30, 2026 · filed Aug 14, 2026
Position Value
$15,479,433
+$154,795 QoQ
Shares Held
814,707
0.0% QoQ
Ownership
0.726%
of shares outstanding
% of Portfolio
0.76%
of 13F equity value
Holder Rank
#12
of 92 holders
Holding Since
Mar 2020
26 quarters on record
Voting authority Sole 100% Shared 0% None 0%

Common Shares in ZLAB Over Time

Shares Held

Position Value (USD)

Position in Biotechnology

Healthcare · as of Jun 30, 2026

Rock Springs Capital Management LP holds $1,502,002,537 across 70 Biotechnology names. ZLAB ranks #32 (1.0% of the industry book) .

# Ticker Company Shares Value (USD) Open
1 RVMD
Revolution Medicines, Inc.
 1,105,210 $206,983,728
2 TVTX
Travere Therapeutics, Inc.
 2,179,069 $123,792,909
3 MDGL
Madrigal Pharmaceuticals, Inc.
 174,999 $93,965,713
4 MIRM
Mirum Pharmaceuticals, Inc.
 798,145 $93,438,835
5 RYTM
Rhythm Pharmaceuticals, Inc.
 692,598 $76,899,155
6 KYMR
Kymera Therapeutics, Inc.
 453,156 $51,963,398
7 ARGX
Argenx SE
 52,750 $48,939,867
8 ASND
Ascendis Pharma A/S
 168,750 $45,009,000

All Filings in ZLAB

Export CSV
26 filing rows on record
Report Date Value (USD) Shares
2026-06-30 $15,479,433 814,707
2026-03-31 $15,324,638 814,707
2025-12-31 $14,315,671 811,546
2025-09-30 $26,813,530 791,193
2025-06-30 $30,472,578 871,392
2025-03-31 $32,691,954 904,592
2024-12-31 $34,186,776 1,305,337
2024-09-30 $31,760,346 1,315,673
2024-06-30 $22,492,139 1,297,873
2024-03-31 $20,779,910 1,297,123
2023-12-31 $31,074,838 1,137,023
2023-09-30 $30,072,029 1,237,023
2023-06-30 $33,897,789 1,222,423
2023-03-31 $35,245,622 1,059,700
2022-12-31 $32,532,790 1,059,700
2022-09-30 $40,780,080 1,192,400
2022-06-30 $42,167,412 1,215,900
2022-03-31 $53,035,482 1,205,900
2021-12-31 $74,206,995 1,180,700
2021-09-30 $113,584,072 1,077,750
2021-06-30 $179,467,860 1,014,000
2021-03-31 $124,556,905 933,500
2020-12-31 $115,702,030 854,899
2020-09-30 $68,492,740 823,527
2020-06-30 $66,791,893 813,246
2020-03-31 $38,610,000 750,000