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ON24 Inc.

ONTFDelisted Apr 1, 2026
Industry
Services-Prepackaged Software
SEC CIK
0001110611

ON24 Inc. was delisted on Apr 1, 2026; its insiders filed their last Form 4 on Apr 2, 2026; 124 institutions reported holding it in 13F filings for Q1 2026, worth $221.6M in total; no superinvestor held it.

Holders of 5% or more of ONTF

Holders whose latest Schedule 13D or 13G filing reports 5% or more of ON24 Inc., largest stake first. The change is against the holder's previous filing.

Holders of 5% or more of ONTF
HolderLatest formStakeChangeFirst filedLatest filingFiling
BlackRock, Inc.13G/A5.30%2.26M shares–Apr 17, 20251 filingApr 17, 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

25 Schedule 13D and 13G filings on ON24 Inc., newest first, including old-format filings without a stake.

Schedule 13D and 13G filings on ONTF
Filed (ET)FilerFormStakeChangeEvent dateFiling
Apr 3, 20265:18 PM ETIndaba Capital Management, L.P.and 2 others13D/A0.00%0 shares−10.00 ppfrom 10.00%Below 5%Apr 1, 2026SEC
Apr 2, 20266:36 PM ETLynrock Lake LPand 2 others13D/A0.00%0 shares−19.70 ppfrom 19.70%Below 5%Apr 1, 2026SEC
Apr 2, 20262:08 PM ETSharan Sharat13G/A0.00%0 shares–Below 5%Apr 1, 2026SEC
Jan 30, 20262:17 PM ETVanguard Group Inc13G/A4.67%1.98M shares–Below 5%Dec 31, 2025SEC
Dec 31, 20255:38 PM ETIndaba Capital Management, L.P.and 2 others13D/A10.00%4.24M shares0.00 ppfrom 10.00%Dec 29, 2025SEC
Dec 31, 20254:16 PM ETLynrock Lake LPand 2 others13D/A19.70%8.38M shares+0.10 ppfrom 19.60%Dec 29, 2025SEC
Jun 10, 20259:53 PM ETLynrock Lake LPand 2 others13D/A19.60%8.35M shares+1.20 ppfrom 18.40%Jun 6, 2025SEC
May 14, 20259:44 PM ETLynrock Lake LPand 2 others13D/A18.40%7.82M shares–May 12, 2025SEC
Apr 17, 20259:35 AM ETBlackRock, Inc.13G/A5.30%2.26M shares–Mar 31, 2025SEC
Mar 19, 20257:04 PM ETIndaba Capital Management, L.P.and 2 others13D/A10.00%4.24M shares–Mar 17, 2025SEC
Feb 26, 2024Indaba Capital Management, L.P.13D/AOld format–––SEC
Feb 14, 2024Greenhouse Funds LLLP13G/AOld format–––SEC
Feb 13, 2024Sharan Sharat13G/AOld format–––SEC
Feb 13, 2024Vanguard Group Inc13G/AOld format–––SEC
Jan 29, 20243:26 PM ETBlackRock Inc.13G/AOld format–––SEC
Jan 18, 2024Indaba Capital Management, L.P.13D/AOld format–––SEC
Jan 16, 2024Lynrock Lake LP13D/AOld format–––SEC
Aug 11, 2023Lynrock Lake LP13D/AOld format–––SEC
Mar 13, 2023Lynrock Lake LP13D/AOld format–––SEC
Mar 13, 2023Indaba Capital Management, L.P.13D/AOld format–––SEC
Feb 14, 2023Lynrock Lake LP13DOld format–––SEC
Feb 13, 2023Sharan Sharat13G/AOld format–––SEC
Feb 9, 2023Vanguard Group Inc13G/AOld format–––SEC
Feb 8, 2023Goldman Sachs Group Inc13G/AOld format–––SEC
Feb 3, 202312:09 PM ETBlackRock Inc.13GOld format–New–SEC
Jan 26, 2023Greenhouse Funds LLLP13GOld format–New–SEC
Dec 20, 2022Indaba Capital Management, L.P.13DOld format–––SEC
May 10, 2022Lynrock Lake LP13G/AOld format–––SEC
Feb 14, 2022Sharan Sharat13GOld format–New–SEC
Feb 14, 2022Indaba Capital Management, L.P.13GOld format–New–SEC
Feb 14, 2022Lynrock Lake LP13GOld format–New–SEC
Feb 11, 2022Goldman Sachs Group Inc13GOld format–New–SEC
Feb 10, 2022Vanguard Group Inc13GOld format–New–SEC

Form 144: proposed insider sales

Notices from officers, directors and other affiliates planning to sell ON24 Inc. shares.

No Form 144 notices for ON24 Inc. are on file.