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Arcturus Therapeutics Holdings Inc.

ARCT
Exchange
Nasdaq
Industry
Pharmaceutical Preparations
SEC CIK
0001768224

No open-market purchases or sales by Arcturus Therapeutics Holdings Inc. insiders were filed in the last 90 days; 135 institutions reported holding it in 13F filings for Q2 2026, worth $167.9M in total; ARK Invest is the only superinvestor holding it.

Holders of 5% or more of ARCT

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

Holders of 5% or more of ARCT
HolderLatest formStakeChangeFirst filedLatest filingFiling
Federated Hermes, Inc.13G/A11.63%3.30M shares–Jan 8, 20215 filingsJan 8, 2026SEC
ARK Investment Management LLCSuperinvestorARK Invest13G/A10.37%2.95M shares+1.18 ppfrom 9.19%Feb 16, 20218 filingsMay 7, 2026SEC
BlackRock, Inc.13G/A7.80%2.10M shares–Apr 23, 20251 filingApr 23, 2025SEC
Nikko Asset Management Americas, Inc.13G/A7.20%1.95M shares+0.10 ppfrom 7.10%Feb 14, 20226 filingsNov 13, 2025SEC
Sumitomo Mitsui Trust Holdings, Inc.13G/A7.20%1.95M shares+0.10 ppfrom 7.10%Feb 4, 20226 filingsOct 27, 2025SEC

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

49 Schedule 13D and 13G filings on Arcturus Therapeutics Holdings Inc., newest first, including old-format filings without a stake.

Schedule 13D and 13G filings on ARCT
Filed (ET)FilerFormStakeChangeEvent dateFiling
May 7, 20263:37 PM ETARK Investment Management LLCand 1 otherSuperinvestorARK Invest13G/A10.37%2.95M shares+1.18 ppfrom 9.19%Apr 30, 2026SEC
Mar 26, 20263:56 PM ETVanguard Group Inc13G/A0.00%0 shares−6.67 ppfrom 6.67%Below 5%Mar 13, 2026SEC
Feb 17, 20266:49 AM ETBalyasny Asset Management LLCand 4 others13G/A0.00%0 shares−8.04 ppfrom 8.04%Below 5%Dec 31, 2025SEC
Feb 3, 202611:27 AM ETARK Investment Management LLCand 1 otherSuperinvestorARK Invest13G/A9.19%2.61M shares+2.87 ppfrom 6.32%Dec 31, 2025SEC
Jan 8, 20268:12 AM ETFederated Hermes, Inc.and 4 others13G/A11.63%3.30M shares–Dec 31, 2025SEC
Nov 14, 20256:02 AM ETBalyasny Asset Management LLCand 4 others13G8.04%2.18M sharesNewSep 30, 2025SEC
Nov 13, 20259:24 AM ETNikko Asset Management Americas, Inc.13G/A7.20%1.95M shares+0.10 ppfrom 7.10%Sep 30, 2025SEC
Oct 27, 20256:57 AM ETSumitomo Mitsui Trust Holdings, Inc.and 1 other13G/A7.20%1.95M shares+0.10 ppfrom 7.10%Sep 30, 2025SEC
Jul 30, 20251:16 PM ETARK Investment Management LLCand 1 otherSuperinvestorARK Invest13G/A6.32%1.72M shares–Jun 30, 2025SEC
Jul 29, 202512:05 PM ETVanguard Group Inc13G/A6.67%1.81M shares–Jun 30, 2025SEC
May 12, 20252:10 PM ETNikko Asset Management Americas, Inc.13G/A7.10%1.93M shares–Mar 31, 2025SEC
Apr 25, 20256:18 AM ETSumitomo Mitsui Trust Holdings, Inc.and 1 other13G/A7.10%1.93M shares–Mar 31, 2025SEC
Apr 23, 20258:14 PM ETBlackRock, Inc.13G/A7.80%2.10M shares–Mar 31, 2025SEC
Feb 5, 20257:52 AM ETState Street Corp13G4.90%1.33M shares–Below 5%Dec 31, 2024SEC
Nov 8, 2024Nikko Asset Management Americas, Inc.13GOld format–––SEC
Nov 5, 2024Sumitomo Mitsui Trust Holdings, Inc.13GOld format–––SEC
Apr 5, 202412:18 PM ETBlackRock Inc.13G/AOld format–––SEC
Feb 13, 2024Vanguard Group Inc13G/AOld format–––SEC
Feb 12, 2024Nikko Asset Management Americas, Inc.13G/AOld format–––SEC
Feb 5, 2024Sumitomo Mitsui Trust Holdings, Inc.13G/AOld format–––SEC
Jan 29, 2024ARK Investment Management LLCSuperinvestorARK Invest13G/AOld format–––SEC
Jan 25, 20241:48 PM ETBlackRock Inc.13G/AOld format–––SEC
Jan 25, 2024State Street Corp13G/AOld format–––SEC
Jan 17, 2024Federated Hermes, Inc.13G/AOld format–––SEC
Oct 10, 2023State Street Corp13G/AOld format–––SEC
Feb 10, 2023Nikko Asset Management Americas, Inc.13G/AOld format–––SEC
Feb 10, 2023ARK Investment Management LLCSuperinvestorARK Invest13G/AOld format–––SEC
Feb 9, 2023Vanguard Group Inc13GOld format–New–SEC
Feb 8, 2023State Street Corp13G/AOld format–––SEC
Feb 3, 2023Sumitomo Mitsui Trust Holdings, Inc.13G/AOld format–––SEC
Feb 1, 2023Federated Hermes, Inc.13G/AOld format–––SEC
Jan 31, 20231:58 PM ETBlackRock Inc.13G/AOld format–––SEC
Apr 11, 2022State Street Corp13G/AOld format–––SEC
Feb 14, 2022Federated Hermes, Inc.13GOld format–––SEC
Feb 14, 2022Nikko Asset Management Americas, Inc.13GOld format–New–SEC
Feb 14, 2022Price T Rowe Associates Inc13G/AOld format–––SEC
Feb 11, 2022State Street Corp13GOld format–New–SEC
Feb 9, 2022ARK Investment Management LLCSuperinvestorARK Invest13G/AOld format–––SEC
Feb 4, 2022Sumitomo Mitsui Trust Holdings, Inc.13GOld format–New–SEC
Feb 3, 20224:41 PM ETBlackRock Inc.13G/AOld format–––SEC
Nov 9, 2021ARK Investment Management LLCSuperinvestorARK Invest13G/AOld format–––SEC
Oct 26, 20214:44 PM ETUltragenyx Pharmaceutical Inc.13D/AOld format–––SEC
Aug 12, 20215:09 PM ETUltragenyx Pharmaceutical Inc.13D/AOld format–––SEC
Feb 16, 2021ARK Investment Management LLCSuperinvestorARK Invest13G/AOld format–––SEC
Feb 16, 2021Cormorant Asset Management, LP13G/AOld format–––SEC
Feb 16, 2021Price T Rowe Associates Inc13GOld format–New–SEC
Feb 12, 2021HealthCor Management, L.P.13G/AOld format–––SEC
Feb 2, 20213:13 PM ETBlackRock Inc.13GOld format–New–SEC
Jan 8, 2021Federated Hermes, Inc.13GOld format–New–SEC

Form 144: proposed insider sales

Notices from officers, directors and other affiliates planning to sell Arcturus Therapeutics Holdings Inc. shares.

No Form 144 notices for Arcturus Therapeutics Holdings Inc. are on file.