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NEXTBio Capital Management LP

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13F filer, CIK 2038158, AUSTIN, TX

NEXTBio Capital Management LP reported $217,397,102 across 22 holdings for the quarter ended 2026-06-30, in a 13F-HR filed 2026-08-14. Its ten largest share positions make up 77.7% of the portfolio.

Filed (acceptance time not in the bulk data set), ingested 13F-HR 0001172661-26-003533

Period
2026-06-30
Reported value
$217M
Holdings
22
Top 10 weight
77.7%
New
3
Sold out
5

Largest buys vs the previous quarter

SecurityShares changeApprox. value
GPCRadded+179,257$9.62M
STTKadded+577,441$4.01M
PHVSnew+108,055$3.74M
BIOAnew+100,732$2.47M
LBRXnew+68,249$2.22M

Ranked by the share change valued at this quarter's implied price (value over shares in the 13F). A position sold out is valued at the previous quarter's price, its last report.

Largest sells vs the previous quarter

SecurityShares changeApprox. value
TERNexited-604,534-$31.9M
CMPXexited-848,204-$4.49M
OCSexited-149,592-$3.98M
CMPSreduced-245,648-$3.48M
KALVexited-131,796-$2.65M

Ranked by the share change valued at this quarter's implied price (value over shares in the 13F). A position sold out is valued at the previous quarter's price, its last report.

Holdings, Q2 2026

Share positions as resolved from 13F-HR 0001172661-26-003533, largest first. % of portfolio is the value over $217,397,102, the sum of the share positions whose value is usable for ratios (method).

SecurityHistorySharesValue% of portfolioChangeLatest eventTimeline
PTGXPROTAGONIST THERAPEUTICS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not loaded; 2024Q4: not loaded; 2025Q1: not loaded; 2025Q2: not loaded; 2025Q3: not loaded; 2025Q4: 229,619 shares; 2026Q1: 229,619 shares; 2026Q2: 219,333 shares 219,333$26.9M12.37%-10,286Timeline
STTKSHATTUCK LABS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not loaded; 2024Q4: not loaded; 2025Q1: not loaded; 2025Q2: not loaded; 2025Q3: not loaded; 2025Q4: 3,149,907 shares; 2026Q1: 3,149,907 shares; 2026Q2: 3,727,348 shares 3,727,348$25.9M11.9%+577,441Timeline
CMPSCOMPASS PATHWAYS PLCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not loaded; 2024Q4: not loaded; 2025Q1: not loaded; 2025Q2: not loaded; 2025Q3: not loaded; 2025Q4: 752,631 shares; 2026Q1: 2,021,407 shares; 2026Q2: 1,775,759 shares 1,775,759$25.1M11.56%-245,648Timeline
GPCRSTRUCTURE THERAPEUTICS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not loaded; 2024Q4: not loaded; 2025Q1: not loaded; 2025Q2: not loaded; 2025Q3: not loaded; 2025Q4: 94,443 shares; 2026Q1: 133,239 shares; 2026Q2: 312,496 shares 312,496$16.8M7.71%+179,257Timeline
VORVOR BIOPHARMA INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not loaded; 2024Q4: not loaded; 2025Q1: not loaded; 2025Q2: not loaded; 2025Q3: not loaded; 2025Q4: 999,967 shares; 2026Q1: 999,967 shares; 2026Q2: 889,164 shares 889,164$16.4M7.53%-110,803Timeline
RYTMRHYTHM PHARMACEUTICALS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not loaded; 2024Q4: not loaded; 2025Q1: not loaded; 2025Q2: not loaded; 2025Q3: not loaded; 2025Q4: 67,586 shares; 2026Q1: 126,078 shares; 2026Q2: 131,758 shares 131,758$14.6M6.73%+5,680Timeline
PVLAPALVELLA THERAPEUTICS INC NEQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not loaded; 2024Q4: not loaded; 2025Q1: not loaded; 2025Q2: not loaded; 2025Q3: not loaded; 2025Q4: 82,686 shares; 2026Q1: 82,686 shares; 2026Q2: 89,909 shares 89,909$13.7M6.32%+7,223Timeline
XENEXENON PHARMACEUTICALS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not loaded; 2024Q4: not loaded; 2025Q1: not loaded; 2025Q2: not loaded; 2025Q3: not loaded; 2025Q4: 183,704 shares; 2026Q1: 183,225 shares; 2026Q2: 183,225 shares 183,225$11.1M5.09%0Timeline
ZBIOZENAS BIOPHARMA INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not loaded; 2024Q4: not loaded; 2025Q1: not loaded; 2025Q2: not loaded; 2025Q3: not loaded; 2025Q4: 321,983 shares; 2026Q1: 426,736 shares; 2026Q2: 426,736 shares 426,736$10.8M4.98%0Timeline
ORICORIC PHARMACEUTICALS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not loaded; 2024Q4: not loaded; 2025Q1: not loaded; 2025Q2: not loaded; 2025Q3: not loaded; 2025Q4: 615,720 shares; 2026Q1: 523,619 shares; 2026Q2: 706,124 shares 706,124$7.65M3.52%+182,505Timeline
IVAINVENTIVA SAQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not loaded; 2024Q4: not loaded; 2025Q1: not loaded; 2025Q2: not loaded; 2025Q3: not loaded; 2025Q4: 1,298,701 shares; 2026Q1: 1,333,484 shares; 2026Q2: 1,787,984 shares 1,787,984$6.76M3.11%+454,500Timeline
CBIOCRESCENT BIOPHARMA INC.Quarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not loaded; 2024Q4: not loaded; 2025Q1: not loaded; 2025Q2: not loaded; 2025Q3: not loaded; 2025Q4: 372,856 shares; 2026Q1: 372,856 shares; 2026Q2: 372,856 shares 372,856$6.71M3.09%0Timeline
PCVXVAXCYTE INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not loaded; 2024Q4: not loaded; 2025Q1: not loaded; 2025Q2: not loaded; 2025Q3: not loaded; 2025Q4: 95,485 shares; 2026Q1: 95,223 shares; 2026Q2: 107,223 shares 107,223$6.23M2.87%+12,000Timeline
COGTCOGENT BIOSCIENCES INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not loaded; 2024Q4: not loaded; 2025Q1: not loaded; 2025Q2: not loaded; 2025Q3: not loaded; 2025Q4: 95,819 shares; 2026Q1: 131,188 shares; 2026Q2: 131,075 shares 131,075$5.07M2.33%-113Timeline
VSTMVERASTEM INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not loaded; 2024Q4: not loaded; 2025Q1: not loaded; 2025Q2: not loaded; 2025Q3: not loaded; 2025Q4: 1,307,330 shares; 2026Q1: 1,306,800 shares; 2026Q2: 1,306,800 shares 1,306,800$4.99M2.3%0Timeline
IRONDISC MEDICINE INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not loaded; 2024Q4: not loaded; 2025Q1: not loaded; 2025Q2: not loaded; 2025Q3: not loaded; 2025Q4: 42,778 shares; 2026Q1: 52,655 shares; 2026Q2: 52,655 shares 52,655$3.85M1.77%0Timeline
PHVSPHARVARIS N VQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not loaded; 2024Q4: not loaded; 2025Q1: not loaded; 2025Q2: not loaded; 2025Q3: not loaded; 2025Q4: not reported; 2026Q1: not reported; 2026Q2: 108,055 shares 108,055$3.74M1.72%newTimeline
ZLABZAI LAB LTDQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not loaded; 2024Q4: not loaded; 2025Q1: not loaded; 2025Q2: not loaded; 2025Q3: not loaded; 2025Q4: 163,362 shares; 2026Q1: 183,362 shares; 2026Q2: 183,362 shares 183,362$3.48M1.6%0Timeline
BIOABIOAGE LABS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not loaded; 2024Q4: not loaded; 2025Q1: not loaded; 2025Q2: not loaded; 2025Q3: not loaded; 2025Q4: not reported; 2026Q1: not reported; 2026Q2: 100,732 shares 100,732$2.47M1.14%newTimeline
LBRXLB PHARMACEUTICALS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not loaded; 2024Q4: not loaded; 2025Q1: not loaded; 2025Q2: not loaded; 2025Q3: not loaded; 2025Q4: not reported; 2026Q1: not reported; 2026Q2: 68,249 shares 68,249$2.22M1.02%newTimeline
EVMNEVOMMUNE INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not loaded; 2024Q4: not loaded; 2025Q1: not loaded; 2025Q2: not loaded; 2025Q3: not loaded; 2025Q4: 228,286 shares; 2026Q1: 184,063 shares; 2026Q2: 119,063 shares 119,063$1.58M0.73%-65,000Timeline
ACETADICET BIO INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not loaded; 2024Q4: not loaded; 2025Q1: not loaded; 2025Q2: not loaded; 2025Q3: not loaded; 2025Q4: 157,827 shares; 2026Q1: 157,827 shares; 2026Q2: 157,827 shares 157,827$1.36M0.63%0Timeline

Sold out in Q2 2026

Positions in the previous quarter's report that this quarter's report no longer lists.

SecurityShares beforeValue beforeType
TERNTERNS PHARMACEUTICALS INC604,534$31.9Mshares
CMPXCOMPASS THERAPEUTICS INC848,204$4.49Mshares
OCSOCULIS HOLDING AG149,592$3.98Mshares
KALVKALVISTA PHARMACEUTICALS INC131,796$2.65Mshares
SMMTSUMMIT THERAPEUTICS INC89,717$1.7Mshares

How Q2 2026 was built

Available 13F filings of this filer for the quarter and their roles: the base report is the latest original or restatement, NEW HOLDINGS amendments filed after it are added (method).

FilingRoleAmendmentFiledAcceptedIngested
13F-HR 0001172661-26-003533 base2026-08-14acceptance time not in the bulk data set

Filings

Every filing of this filer: 13F reports and notices, the 13D and 13G it filed or is a reporting person of, and Forms 3, 4 and 5 it reported as an owner.

FilingSubjectFiledAcceptedIngested
13F-HR 0001172661-26-003533 Quarter ended 2026-06-302026-08-14acceptance time not in the bulk data set
13F-HR 0001172661-26-001957 Quarter ended 2026-03-312026-05-14acceptance time not in the bulk data set
13F-HR 0001172661-26-000761 Quarter ended 2025-12-312026-02-13acceptance time not in the bulk data set