Comparable stake leader
BlackRock, Inc.
SEC ownership of ON24 INC.
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0001110611.
Disclosed value leader
PRESIDIO MANAGEMENT GROUP VII L L C
Comparable rows
3/10
Latest evidence
30 Jun 2026
- Public ticker
- ONTF on NYSE
- Parsed ownership sources
-
13D/G, 13F, and 3/4/5
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
- Largest SEC-reported holder
-
BlackRock, Inc.
Ranking: Comparable ownership first, then disclosed value
- Comparable ownership rows
-
3 of 10
Meaning: Rows with safely comparable ownership %
- Latest 13D/G holder
-
BlackRock, Inc.
Source: Latest parsed Schedule 13D/G stake
- Latest parsed ownership date
-
30 Jun 2026
Freshness: Most recent filing date in this holder set
- Issuer CIK
- 0001110611
- Issuer location
- San Francisco, CA
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
3 signals
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of ON24 INC. (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
BlackRock, Inc.
Disclosed value leader
PRESIDIO MANAGEMENT GROUP...
Comparable rows
3/10
Latest evidence
30 Jun 2026
13D/G
13F
3/4/5
Lead comparable stake: 5.3%
7 rows are not safely comparable across share classes.
13D/G row: BlackRock, Inc.
Showing 1-8 of 10 holder rows.
Quick read
BlackRock, Inc. leads the comparable SEC ownership view at 5.3%.
3 of 10 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens BlackRock, Inc.'s linked filing trail.
Comparable ownership
Top 3
BlackRock, Inc.
5.3%
VANGUARD GROUP INC
4.7%
IFP Advisors, Inc
0%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-8 of 10 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| BlackRock, Inc. |
13D/G
|
5.3%
|
$10,576,819
2,260,004 shares
|
$0 | 31 Mar 2025 |
| VANGUARD GROUP INC |
13D/G
The Vanguard Group
|
4.7%
|
$15,745,931
1,978,132 shares
|
$0 | 31 Dec 2025 |
| IFP Advisors, Inc |
13F
Company
|
0%
|
$470
58 shares
|
— | 30 Jun 2026 |
| PRESIDIO MANAGEMENT GROUP VII L L C |
3/4/5
10%+ Owner
|
—
class O/S missing
|
$34,182,982
4,555,423 shares
|
— | 17 Aug 2021 |
| Canaan Equity Aggregator LLC |
3/4/5
10%+ Owner
|
—
class O/S missing
|
$33,836,870
4,509,298 shares
|
— | 02 Aug 2021 |
| Indaba Capital Management, L.P. |
3/4/5
10%+ Owner
|
—
class O/S missing
|
$31,818,033
4,240,256 shares
|
— | 08 Nov 2023 |
| GOLDMAN SACHS GROUP INC |
3/4/5
Other*
|
—
class O/S missing
|
$24,963,477
3,326,778 shares
|
— | 14 Mar 2022 |
| Denise Persson |
3/4/5
Director
|
—
class O/S missing
|
$1,985,400
264,586 shares
|
— | 10 Jun 2022 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
Forms 3/4/5 flow
Insider trading overview
Net insider flow leans to selling over the last 12 months. Net value: -$4,473,632.
Buys
$0
Insiders: 0
Sells
$4,473,632
Insiders: 4
Net
-$4,473,632
Shares: -665,501
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 0
Shares: 665,501
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 0 | $0 | $0 | $0 |
| 3-6 | 0 | 129,849 | $0 | $1,042,221 | -$1,042,221 |
| 6-9 | 0 | 329,113 | $0 | $2,286,455 | -$2,286,455 |
| 9-12 | 0 | 206,539 | $0 | $1,144,956 | -$1,144,956 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-19 of 19 reporting-owner rows connected to ON24 INC.. Open a relationship link for the CIK-to-CIK filing trail.
Rows
19
Largest Forms 3/4/5 holder
PRESIDIO MANAGEMENT GROUP VII L L C
Net 12M change
-$4,473,631
Latest report
01 Apr 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| PRESIDIO MANAGEMENT GROUP VII L L C | 10%+ Owner | $34,182,982 | Mixed | 17 Aug 2021 | ||
| Canaan Equity Aggregator LLC | 10%+ Owner | $33,836,870 | Mixed | 02 Aug 2021 | ||
| Indaba Capital Management, L.P. | 10%+ Owner | $31,818,033 | Mixed | 08 Nov 2023 | ||
| GOLDMAN SACHS GROUP INC | Other* | $24,963,477 | Mixed | 14 Mar 2022 | ||
| Denise Persson | Director | $1,985,400 | Mixed | 10 Jun 2022 | ||
| Irwin Federman | Director | $455,331 | Mixed | 21 Jun 2024 | ||
| James Blackie | Chief Revenue Officer | $51,179 | -$559,338 | -92% | Mixed | 01 Apr 2026 |
| Sharat Sharan | President and Chief Executive, Director, 10%+ Owner | $0 | -$1,605,189 | -100% | Mixed | 01 Apr 2026 |
| Lynrock Lake LP | 10%+ Owner | $0 | Mixed | 01 Apr 2026 | ||
| LYNROCK LAKE PARTNERS LLC | 10%+ Owner | $0 | Mixed | 01 Apr 2026 | ||
| Dominique Trempont | Director | $0 | Mixed | 01 Apr 2026 | ||
| Steven Vattuone | Chief Financial Officer | $0 | -$1,558,984 | -100% | Mixed | 01 Apr 2026 |
| Jayesh Sahasi | EV President, Product and CTO | $0 | -$750,120 | -100% | Mixed | 01 Apr 2026 |
| Barry Zwarenstein | Director | $0 | Mixed | 01 Apr 2026 | ||
| Anil Arora | Director | $0 | Mixed | 01 Apr 2026 | ||
| Cynthia Paul | Director, 10%+ Owner | $0 | Mixed | 01 Apr 2026 | ||
| Teresa Anania | Director | $0 | Mixed | 01 Apr 2026 | ||
| Anthony Zingale | Director | $0 | Mixed | 01 Apr 2026 | ||
| Ronald Paul Mitchell | Director | $0 | Mixed | 01 Apr 2026 |
Recent insider transactions for ON24 INC.
Showing up to 300 recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | SEC-reported value | SEC-reported price | Shares | Shares owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| Lynrock Lake LP | ONTF | Common Stock | Disposition pursuant to a tender of shares in a change of control transaction | -100% | -8,293,974 | 0 | 01 Apr 2026 | By Fund | ||
| Lynrock Lake LP | ONTF | Common Stock | Disposition pursuant to a tender of shares in a change of control transaction | -100% | -8,293,974 | 0 | 01 Apr 2026 | By Fund | ||
| Lynrock Lake LP | ONTF | Common Stock | Disposition pursuant to a tender of shares in a change of control transaction | -100% | -8,293,974 | 0 | 01 Apr 2026 | By Fund | ||
| Lynrock Lake LP | ONTF | Common Stock | Disposed to Issuer | -100% | -141,095 | 0 | 01 Apr 2026 | Direct | ||
| Lynrock Lake LP | ONTF | Common Stock | Disposed to Issuer | -100% | -141,095 | 0 | 01 Apr 2026 | Direct | ||
| Lynrock Lake LP | ONTF | Common Stock | Disposed to Issuer | -100% | -141,095 | 0 | 01 Apr 2026 | Direct | ||
| Anthony Zingale | ONTF | Common Stock | Disposed to Issuer | -100% | -137,265 | 0 | 01 Apr 2026 | Direct | ||
| Ronald Paul Mitchell | ONTF | Common Stock | Disposed to Issuer | -100% | -141,095 | 0 | 01 Apr 2026 | Direct | ||
| Anil Arora | ONTF | Common Stock | Disposed to Issuer | -100% | -157,903 | 0 | 01 Apr 2026 | Direct | ||
| Teresa Anania | ONTF | Common Stock | Disposed to Issuer | -100% | -141,095 | 0 | 01 Apr 2026 | Direct | ||
| Dominique Trempont | ONTF | Common Stock | Disposed to Issuer | -100% | -276,389 | 0 | 01 Apr 2026 | Direct | ||
| Dominique Trempont | ONTF | Stock Options (Right to buy) | Disposed to Issuer | -100% | -53,131 | 0 | 01 Apr 2026 | Direct | ||
| Barry Zwarenstein | ONTF | Common Stock | Disposed to Issuer | -100% | -154,586 | 0 | 01 Apr 2026 | Direct | ||
| Barry Zwarenstein | ONTF | Stock Options (Right to buy) | Disposed to Issuer | -100% | -110,834 | 0 | 01 Apr 2026 | Direct | ||
| Steven Vattuone | ONTF | Common Stock | Disposed to Issuer | -100% | -511,936 | 0 | 01 Apr 2026 | Direct | ||
| Steven Vattuone | ONTF | Common Stock | Award | 18.5% | 79,935 | 511,936 | 01 Apr 2026 | Direct | ||
| Steven Vattuone | ONTF | Stock Options (Right to buy) | Disposed to Issuer | -100% | -100,000 | 0 | 01 Apr 2026 | Direct | ||
| Jayesh Sahasi | ONTF | Common Stock | Disposed to Issuer | -100% | -738,621 | 0 | 01 Apr 2026 | Direct | ||
| Jayesh Sahasi | ONTF | Common Stock | Award | 9.08% | 61,489 | 738,621 | 01 Apr 2026 | Direct | ||
| Jayesh Sahasi | ONTF | Stock Options (Right to buy) | Disposed to Issuer | -100% | -304,499 | 0 | 01 Apr 2026 | Direct | ||
| James Blackie | ONTF | Common Stock | Disposed to Issuer | -100% | -539,964 | 0 | 01 Apr 2026 | Direct | ||
| James Blackie | ONTF | Common Stock | Award | 12.3% | 59,029 | 539,964 | 01 Apr 2026 | Direct | ||
| James Blackie | ONTF | Stock Options (Right to buy) | Disposed to Issuer | -100% | -475,775 | 0 | 01 Apr 2026 | Direct | ||
| James Blackie | ONTF | Stock Option (Right to Buy) | Disposed to Issuer | -100% | -35,696 | 0 | 01 Apr 2026 | Direct | ||
| Sharat Sharan | ONTF | Common Stock | Disposed to Issuer | -100% | -4,197,237 | 0 | 01 Apr 2026 | Direct | ||
| Sharat Sharan | ONTF | Common Stock | Award | 12.9% | 478,725 | 4,197,237 | 01 Apr 2026 | Direct | ||
| Sharat Sharan | ONTF | Stock Options (Right to buy) | Disposed to Issuer | -100% | -1,301,580 | 0 | 01 Apr 2026 | Direct | ||
| Jayesh Sahasi | ONTF | Common Stock | Sale | -0.54% | $29,536 | $8.07 | -3,662 | 677,132 | 20 Mar 2026 | Direct |
| James Blackie | ONTF | Common Stock | Sale | -0.64% | $25,140 | $8.07 | -3,117 | 480,935 | 20 Mar 2026 | Direct |
| Steven Vattuone | ONTF | Common Stock | Sale | -0.79% | $27,657 | $8.07 | -3,429 | 432,001 | 20 Mar 2026 | Direct |
| Sharat Sharan | ONTF | Common Stock | Sale | -0.46% | $138,494 | $8.07 | -17,171 | 3,718,512 | 20 Mar 2026 | Direct |
| Steven Vattuone | ONTF | Common Stock | Sale | -4.81% | $176,819 | $8.03 | -22,013 | 435,430 | 03 Mar 2026 | Direct |
| Steven Vattuone | ONTF | Common Stock | Sale | -4.76% | $183,333 | $8.01 | -22,884 | 457,443 | 02 Mar 2026 | Direct |
| Jayesh Sahasi | ONTF | Common Stock | Sale | -3.08% | $173,182 | $8.01 | -21,617 | 680,794 | 02 Mar 2026 | Direct |
| James Blackie | ONTF | Common Stock | Sale | -4.02% | $162,447 | $8.01 | -20,277 | 484,052 | 02 Mar 2026 | Direct |
| Sharat Sharan | ONTF | Common Stock | Sale | -0.42% | $125,611 | $8.01 | -15,679 | 3,735,683 | 02 Mar 2026 | Direct |
| Steven Vattuone | ONTF | Common Stock | Award | 6.11% | 27,673 | 480,327 | 26 Feb 2026 | Direct | ||
| Jayesh Sahasi | ONTF | Common Stock | Award | 4.39% | 29,560 | 702,411 | 26 Feb 2026 | Direct | ||
| James Blackie | ONTF | Common Stock | Award | 5.25% | 25,157 | 504,329 | 26 Feb 2026 | Direct | ||
| Sharat Sharan | ONTF | Common Stock | Award | 3.47% | 125,787 | 3,751,362 | 26 Feb 2026 | Direct | ||
| Steven Vattuone | ONTF | Common Stock | Sale | -0.09% | $3,342 | $7.92 | -422 | 452,654 | 11 Feb 2026 | Direct |
| Steven Vattuone | ONTF | Common Stock | Sale | -0.07% | $2,578 | $7.93 | -325 | 453,076 | 10 Feb 2026 | Direct |
| Sharat Sharan | ONTF | Common Stock | Sale | -0.06% | $18,322 | $7.93 | -2,310 | 3,625,575 | 10 Feb 2026 | Direct |
| Jayesh Sahasi | ONTF | Common Stock | Sale | -0.04% | $1,983 | $7.93 | -250 | 672,851 | 10 Feb 2026 | Direct |
| James Blackie | ONTF | Common Stock | Sale | -0.05% | $1,904 | $7.93 | -240 | 479,172 | 10 Feb 2026 | Direct |
| Steven Vattuone | ONTF | Common Stock | Award | 0.17% | 747 | 453,401 | 06 Feb 2026 | Direct | ||
| Sharat Sharan | ONTF | Common Stock | Award | 0.15% | 5,326 | 3,627,885 | 06 Feb 2026 | Direct | ||
| Jayesh Sahasi | ONTF | Common Stock | Award | 0.09% | 574 | 673,101 | 06 Feb 2026 | Direct | ||
| James Blackie | ONTF | Common Stock | Award | 0.12% | 551 | 479,412 | 06 Feb 2026 | Direct | ||
| Sharat Sharan | ONTF | Common Stock | Sale | -1.37% | $401,141 | $7.97 | -50,332 | 3,622,559 | 31 Dec 2025 | Direct |
* marks a reported price that did not pass the local price check.