Skip to main content
Livermore
Livermore
ZHEN

iTeos Therapeutics, Inc.

ITOSDelisted Aug 29, 2025
Industry
Biological Products, (No Diagnostic Substances)
SEC CIK
0001808865

iTeos Therapeutics, Inc. was delisted on Aug 29, 2025; its insiders filed their last Form 4 on Aug 29, 2025; 137 institutions reported holding it in 13F filings for Q2 2025, worth $377.0M in total; no superinvestor held it.

Holders of 5% or more of ITOS

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

Holders of 5% or more of ITOS
HolderLatest formStakeChangeFirst filedLatest filingFiling
Tang Capital Management LLC13D/A100.00%10.0K shares+90.01 ppfrom 9.99%Feb 14, 20255 filingsSep 3, 2025SEC
EcoR1 Capital, LLC13D27.90%10.7M shares+13.00 ppfrom 14.90%May 8, 20253 filingsMay 16, 2025SEC
BlackRock Portfolio Management LLC13G6.10%2.33M sharesNewApr 15, 20251 filingApr 15, 2025SEC
BlackRock, Inc.13G/A5.70%2.18M shares–Apr 23, 20251 filingApr 23, 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

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

Schedule 13D and 13G filings on ITOS
Filed (ET)FilerFormStakeChangeEvent dateFiling
Nov 14, 20254:03 PM ETRidgeback Capital Investments L.P.and 2 others13G/A0.00%0 shares−5.10 ppfrom 5.10%Below 5%Sep 30, 2025SEC
Sep 3, 20254:15 PM ETTang Capital Management LLCand 7 others13D/A100.00%10.0K shares+90.01 ppfrom 9.99%Aug 29, 2025SEC
Aug 14, 20254:03 PM ETBiotechnology Value Fund L Pand 9 others13G/A0.00%0 shares−8.10 ppfrom 8.10%Below 5%Jun 30, 2025SEC
Jul 25, 20254:03 PM ETRidgeback Capital Investments L.P.and 2 others13G5.10%1.94M shares+1.30 ppfrom 3.80%Jul 21, 2025SEC
Jul 22, 20254:31 PM ETTang Capital Management LLCand 6 others13D/A9.99%3.83M shares0.00 ppfrom 9.99%Jul 18, 2025SEC
Jun 12, 20254:27 PM ETTang Capital Management LLCand 6 others13D9.99%3.83M shares0.00 ppfrom 9.99%Jun 11, 2025SEC
Jun 4, 20254:00 PM ETRidgeback Capital Investments L.P.and 2 others13G3.80%1.44M sharesNewBelow 5%May 28, 2025SEC
May 19, 20255:46 PM ETRa Capital Management, L.P.and 3 others13D/A4.90%2.13M shares−5.00 ppfrom 9.90%Below 5%May 15, 2025SEC
May 16, 20257:22 PM ETEcoR1 Capital, LLCand 2 others13D27.90%10.7M shares+13.00 ppfrom 14.90%May 15, 2025SEC
May 15, 20255:30 PM ETMPM BioVentures 2014, L.P.and 15 others13D/A4.70%1.80M shares–Below 5%May 13, 2025SEC
May 15, 20254:35 PM ETBiotechnology Value Fund L Pand 9 others13G/A8.10%3.08M shares–Mar 31, 2025SEC
May 15, 20254:15 PM ETTang Capital Management LLCand 5 others13G9.99%3.83M shares+9.39 ppfrom 0.60%May 13, 2025SEC
May 14, 20256:34 PM ETRa Capital Management, L.P.and 3 others13D/A9.90%4.16M shares–May 12, 2025SEC
May 13, 20257:10 PM ETEcoR1 Capital, LLCand 2 others13G/A14.90%5.73M shares+8.00 ppfrom 6.90%May 13, 2025SEC
May 8, 20257:43 PM ETEcoR1 Capital, LLCand 2 others13G6.90%2.66M sharesNewMay 1, 2025SEC
Apr 23, 20258:57 PM ETBlackRock, Inc.13G/A5.70%2.18M shares–Mar 31, 2025SEC
Apr 15, 20255:04 PM ETBlackRock Portfolio Management LLC13G6.10%2.33M sharesNewMar 31, 2025SEC
Feb 14, 20254:00 PM ETTang Capital Management LLCand 4 others13G/A0.60%221.7K shares–Below 5%Dec 31, 2024SEC

Form 144: proposed insider sales

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

No Form 144 notices for iTeos Therapeutics, Inc. are on file.