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Jade Biosciences, Inc.

JBIO
Exchange
Nasdaq
Industry
Pharmaceutical Preparations
SEC CIK
0001798749

No open-market purchases or sales by Jade Biosciences, Inc. insiders were filed in the last 90 days; 153 institutions reported holding it in 13F filings for Q2 2026, worth $1.62B in total; no superinvestor holds it.

Holders of 5% or more of JBIO

Holders whose latest Schedule 13D or 13G filing reports 5% or more of Jade Biosciences, Inc., largest stake first. The change is against the holder's previous filing.

Holders of 5% or more of JBIO
HolderLatest formStakeChangeFirst filedLatest filingFiling
Fairmount Funds Management LLC13D/A19.99%10.4M shares0.00 ppfrom 19.99%May 1, 20252 filingsOct 8, 2025SEC
FMR LLC13G14.70%4.74M sharesNewJun 6, 20251 filingJun 6, 2025SEC
Venrock Healthcare Capital Partners III, L.P.13G/A9.90%5.12M shares0.00 ppfrom 9.90%May 5, 20252 filingsFeb 17, 2026SEC
Ra Capital Management, L.P.13G7.00%3.21M shares+2.90 ppfrom 4.10%Apr 30, 20252 filingsOct 16, 2025SEC
Bellevue Group AG13G6.80%3.34M sharesNewFeb 17, 20261 filingFeb 17, 2026SEC
BlackRock, Inc.13G/A6.60%2.15M shares+1.30 ppfrom 5.30%Jul 17, 20252 filingsOct 17, 2025SEC
Janus Henderson Group PLC13G6.20%3.06M sharesNewFeb 17, 20261 filingFeb 17, 2026SEC

Stakes are as of each holder's latest filing. Holders whose last filing was in the old format (before December 18, 2024) have no stake on record and are not listed, and after an acquisition or delisting holders usually stop filing.

13D and 13G filings

22 Schedule 13D and 13G filings on Jade Biosciences, Inc., newest first, including old-format filings without a stake.

Schedule 13D and 13G filings on JBIO
Filed (ET)FilerFormStakeChangeEvent dateFiling
Aug 14, 20264:50 PM ETVenrock Healthcare Capital Partners III, L.P.and 6 others13G/A8.30%5.15M shares−1.60 ppfrom 9.90%Jun 30, 2026SEC
Aug 14, 202611:57 AM ETBellevue Group AGand 1 other13G/A5.00%3.06M shares−1.80 ppfrom 6.80%Jun 30, 2026SEC
Jul 17, 20264:05 PM ETParadigm Biocapital Advisors LPand 3 others13G5.10%3.11M sharesNewJul 10, 2026SEC
Jul 8, 20265:43 PM ETJanus Henderson Group PLC13G/A10.60%6.27M shares+4.30 ppfrom 6.30%Jun 30, 2026SEC
Jun 9, 20265:30 PM ETFairmount Funds Management LLCand 4 others13D/A19.99%14.1M shares0.00 ppfrom 19.99%Jun 5, 2026SEC
May 15, 202612:38 PM ETJanus Henderson Group PLC13G/A6.30%3.11M shares+0.10 ppfrom 6.20%Mar 31, 2026SEC
Apr 27, 20264:12 PM ETBlackRock, Inc.13G/A4.70%2.30M shares−1.90 ppfrom 6.60%Below 5%Mar 31, 2026SEC
Mar 5, 20266:04 AM ETSofinnova Venture Partners X, L.P.and 4 others13D/A0.30%107.4K shares–Below 5%Apr 28, 2025SEC
Feb 17, 20266:11 PM ETVenrock Healthcare Capital Partners III, L.P.and 6 others13G/A9.90%5.12M shares0.00 ppfrom 9.90%Dec 31, 2025SEC
Feb 17, 20264:01 PM ETBellevue Group AGand 1 other13G6.80%3.34M sharesNewDec 16, 2025SEC
Feb 17, 202612:57 PM ETJanus Henderson Group PLC13G6.20%3.06M sharesNewDec 31, 2025SEC
Feb 13, 20268:48 AM ETDeep Track Capital, LPand 2 others13G/A0.00%0 shares−6.99 ppfrom 6.99%Below 5%Dec 31, 2025SEC
Jan 30, 20262:17 PM ETVanguard Group Inc13G/A4.24%2.10M shares−1.36 ppfrom 5.60%Below 5%Dec 31, 2025SEC
Nov 14, 20254:28 PM ETFrazier Life Sciences Public Fund, L.P.and 10 others13G/A4.20%1.38M shares0.00 ppfrom 4.20%Below 5%Sep 30, 2025SEC
Nov 14, 20258:18 AM ETDeep Track Capital, LPand 2 others13G/A6.99%2.28M shares−1.65 ppfrom 8.64%Sep 30, 2025SEC
Oct 17, 20256:40 PM ETBlackRock, Inc.13G/A6.60%2.15M shares+1.30 ppfrom 5.30%Sep 30, 2025SEC
Oct 16, 20257:35 PM ETRa Capital Management, L.P.and 3 others13G7.00%3.21M shares+2.90 ppfrom 4.10%Oct 8, 2025SEC
Oct 8, 20254:15 PM ETFairmount Funds Management LLCand 4 others13D/A19.99%10.4M shares0.00 ppfrom 19.99%Oct 6, 2025SEC
Aug 14, 20251:46 PM ETFrazier Life Sciences Public Fund, L.P.and 16 others13G/A4.20%1.34M shares−1.30 ppfrom 5.50%Below 5%Jun 30, 2025SEC
Jul 29, 20251:46 PM ETVanguard Group Inc13G5.60%1.81M sharesNewJun 30, 2025SEC
Jul 17, 20258:12 PM ETBlackRock, Inc.13G5.30%1.71M sharesNewJun 30, 2025SEC
Jun 20, 20254:23 PM ETDeep Track Capital, LPand 2 others13G8.64%2.78M sharesNewApr 28, 2025SEC
Jun 6, 202510:03 AM ETFMR LLCand 1 other13G14.70%4.74M sharesNewMay 30, 2025SEC
May 15, 20254:33 PM ETTCG Crossover GP I, LLCand 2 others13G/A0.20%64.0K shares–Below 5%Apr 28, 2025SEC
May 5, 20254:26 PM ETVenrock Healthcare Capital Partners III, L.P.and 6 others13G9.90%3.22M sharesNewApr 28, 2025SEC
May 5, 20259:43 AM ETFrazier Life Sciences Public Fund, L.P.and 16 others13G5.50%1.77M sharesNewApr 28, 2025SEC
May 1, 20256:31 PM ETFairmount Funds Management LLCand 4 others13D19.99%7.25M sharesNewApr 28, 2025SEC
Apr 30, 20254:51 PM ETRa Capital Management, L.P.and 3 others13D/A4.10%1.32M shares–Below 5%Apr 28, 2025SEC
Apr 30, 20254:29 PM ETAtlas Venture Fund XII, L.P.and 2 others13D/A0.20%51.4K shares–Below 5%Apr 28, 2025SEC
Feb 14, 2022Baker Bros. Advisors LP13GOld format–New–SEC
Feb 14, 2022Citadel Advisors LLC13G/AOld format–––SEC
Feb 14, 2022Cormorant Asset Management, LP13G/AOld format–––SEC
Nov 5, 2021Atlas Venture Associates XII, LLC13DOld format–New–SEC
Jul 13, 2021Sofinnova Venture Partners X, L.P.13DOld format–New–SEC
Jul 12, 2021Ra Capital Management, L.P.13DOld format–New–SEC
Jul 12, 2021Citadel Advisors LLC13GOld format–New–SEC
Jul 12, 2021Cormorant Asset Management, LP13GOld format–New–SEC

Form 144: proposed insider sales

Notices from officers, directors and other affiliates planning to sell Jade Biosciences, Inc. shares.

No Form 144 notices for Jade Biosciences, Inc. are on file.