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HarbourVest Partners LLC

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13F filer, CIK 1201001, Boston, MA

HarbourVest Partners LLC reported $100,905,669 across 5 holdings for the quarter ended 2026-03-31, in a 13F-HR filed 2026-05-15.

Filed (acceptance time not in the bulk data set), ingested 13F-HR 0001193125-26-225130

Period
2026-03-31
Reported value
$101M
Holdings
5
Top 10 weight
100%
New
1
Sold out
3

Largest buys vs the previous quarter

SecurityShares changeApprox. value
GENBnew+1,722,210$21.5M

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
RBRKexited-90,271-$6.9M
EPSNexited-840,598-$3.9M
REPARE THERAPEUTICS INCexited-12,276-$31.9K

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, Q1 2026

Share positions as resolved from 13F-HR 0001193125-26-225130, largest first. % of portfolio is the value over $100,905,670, the sum of the share positions whose value is usable for ratios (method).

SecurityHistorySharesValue% of portfolioChangeLatest eventTimeline
KLARKLARNA GROUP PLCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q2: restricted; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: not reported; 2025Q3: 5,023,320 shares; 2025Q4: 5,023,320 shares; 2026Q1: 5,023,320 shares 5,023,320$65.8M65.17%0Timeline
GENBGENERATE BIOMEDICINES INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q2: restricted; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: not reported; 2025Q3: not reported; 2025Q4: not reported; 2026Q1: 1,722,210 shares 1,722,210$21.5M21.33%newTimeline
YMMFULL TRUCK ALLIANCE CO LTDQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q2: restricted; 2024Q3: 957,580 shares; 2024Q4: 957,580 shares; 2025Q1: 957,580 shares; 2025Q2: 957,580 shares; 2025Q3: 957,580 shares; 2025Q4: 957,580 shares; 2026Q1: 957,580 shares 957,580$7.95M7.88%0Timeline
CAMPCAMP4 THERAPEUTICS CORPQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q2: restricted; 2024Q3: not reported; 2024Q4: 1,271,948 shares; 2025Q1: 1,271,948 shares; 2025Q2: 1,271,948 shares; 2025Q3: 1,271,948 shares; 2025Q4: 1,271,948 shares; 2026Q1: 1,271,948 shares 1,271,948$5.61M5.56%0Timeline
IPSCCENTURY THERAPEUTICS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q2: restricted; 2024Q3: 29,018 shares; 2024Q4: 29,018 shares; 2025Q1: 29,018 shares; 2025Q2: 29,018 shares; 2025Q3: 29,018 shares; 2025Q4: 29,018 shares; 2026Q1: 29,018 shares 29,018$65.6K0.06%0Timeline

Sold out in Q1 2026

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

SecurityShares beforeValue beforeType
RBRKRUBRIK INC.90,271$6.9Mshares
EPSNEPSILON ENERGY LTD840,598$3.9Mshares
REPARE THERAPEUTICS INCREPARE THERAPEUTICS INC12,276$31.9Kshares

How Q1 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 0001193125-26-225130 base2026-05-15acceptance time not in the bulk data set