ON24, Inc.
ON24, Inc. (ONTF) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · ONTF · as of Sep 30, 2025
Ownership Breakdown
105
Institutional Holders
▲ 15 vs Q2
$179.57M
Total Inst. Value
▲ $9.66M vs Q2
42.99M
Shares Outstanding
freeFloat 84.45%
31.39M
13F Shares Held
▲ 102,805 vs Q2
Institutional ownership = 13F shares ÷ total outstanding. Insider % = 100 − free float. Public % = free float − institution %. Data: FMP /symbol-positions-summary + /shares-float + SEC EDGAR.
Top Institutional Holders
ONTF largest shareholders · institutional ownership
Q3 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
LYNROCK LAKE LP services-prepackaged software | 8.29M | 19.48% | 19.48% | $47.44B | Nov 14, 2025 | — held |
INDABA CAPITAL MANAGEMENT, L.P. services-prepackaged software | 4.24M | 9.96% | 9.96% | $24.25B | Nov 14, 2025 | — held |
VANGUARD GROUP INC services-prepackaged software | 2.76M | 6.49% | 6.49% | $15.81B | Nov 7, 2025 | ▼ 31.2K |
BLACKROCK, INC. services-prepackaged software | 2.74M | 6.44% | 6.44% | $15.69B | Nov 12, 2025 | ▼ 94.7K |
DIMENSIONAL FUND ADVISORS LP services-prepackaged software | 1.45M | 3.40% | 3.40% | $8.27B | Nov 12, 2025 | ▼ 10.2K |
JPMORGAN CHASE & CO services-prepackaged software | 1.21M | 2.84% | 2.84% | $6.91B | Nov 26, 2025 | ▼ 120.1K |
FEDERATED HERMES, INC. services-prepackaged software | 1.18M | 2.77% | 2.77% | $6.74B | Nov 3, 2025 | ▲ 5.3K |
ACADIAN ASSET MANAGEMENT LLC services-prepackaged software | 957.3K | 2.25% | 2.25% | $5.47B | Nov 13, 2025 | ▲ 111.6K |
GEODE CAPITAL MANAGEMENT, LLC services-prepackaged software | 852.1K | 2.00% | 2.00% | $4.87B | Nov 12, 2025 | ▼ 186 |
STATE STREET CORP services-prepackaged software | 831.4K | 1.95% | 1.95% | $4.76B | Nov 14, 2025 | ▲ 7.6K |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q3 2025 vs prior quarter
Q3 2025
22
Increased
+649.4K shares0
New Positions
first time holders18
Decreased
−380.5K shares0
Sold Out
fully exitedNet shares change (top 50)
+268.9K
+649.4K / −380.5K
Net new holders
+4
0 new / 0 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
ONTF insider trading · insider activity
Source: SEC Form 4
4
Buy transactions
30
Sell transactions
0.13
Buy/Sell ratio
$17M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
Lynrock Lake LP 10 percent owner | Apr 1, 2026 | D-Return | 141,095 | $8.10 | $1.14M | 0 | Form 4 ↗ |
Lynrock Lake LP 10 percent owner | Apr 1, 2026 | U-Tender | 8,293,974 | $8.10 | $67.18M | 0 | Form 4 ↗ |
ZINGALE ANTHONY director | Apr 1, 2026 | D-Return | 137,265 | $8.10 | $1.11M | 0 | Form 4 ↗ |
Mitchell Ronald Paul director | Apr 1, 2026 | D-Return | 141,095 | $8.10 | $1.14M | 0 | Form 4 ↗ |
Arora Anil director | Apr 1, 2026 | D-Return | 157,903 | $8.10 | $1.28M | 0 | Form 4 ↗ |
ANANIA TERESA director | Apr 1, 2026 | D-Return | 141,095 | $8.10 | $1.14M | 0 | Form 4 ↗ |
Trempont Dominique director | Apr 1, 2026 | D-Return | 276,389 | $8.10 | $2.24M | 0 | Form 4 ↗ |
Trempont Dominique director | Apr 1, 2026 | D-Return | 20,000 | $13.33 | $266.6K | 0 | Form 4 ↗ |
Trempont Dominique director | Apr 1, 2026 | D-Return | 12,131 | $1.35 | $16.4K | 0 | Form 4 ↗ |
Trempont Dominique director | Apr 1, 2026 | D-Return | 21,000 | $1.23 | $25.8K | 0 | Form 4 ↗ |
Source: /insider-trading/search (FMP stable). Buy/Sell direction: acquisitionOrDisposition A=Buy, D=Sell. RSU vesting (M-Exempt) excluded from sentiment bar. All data from SEC EDGAR public filings.
About institutional & insider ownership
ON24, Inc. (ONTF) is primarily owned by institutional investors, who hold approximately 73.0% of total shares outstanding. Company insiders own approximately 15.55%, while retail and public investors account for the remaining 11.43%.
The largest institutional shareholder of ON24, Inc. is LYNROCK LAKE LP, holding approximately 8.29 million shares — equal to 19.48% of outstanding shares — as of September 30, 2025.
A total of 105 institutional investors currently hold ONTF stock, with a combined institutional value of approximately $179,565,389 as of the most recent 13F filing period.
Frequently asked questions
ONTF ownershipON24, Inc. (ONTF) is primarily owned by institutional investors, who hold approximately 73.0% of shares. The largest shareholder is LYNROCK LAKE LP with a 19.48% stake. Company insiders hold 15.55%. Data sourced from SEC Form 13F as of September 30, 2025.