Comparable stake leader
Comer James Lamar Walton
SEC ownership of RTB Digital, Inc.
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0001419275.
Disclosed value leader
GreenBox POS LLC
Comparable rows
27/50
Latest evidence
21 Sep 2026
- Public ticker
- RTB on Nasdaq
- Parsed ownership sources
-
13D/G, 3/4/5, and 13F
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
- Largest SEC-reported holder
-
Comer James Lamar Walton
Ranking: Comparable ownership first, then disclosed value
- Comparable ownership rows
-
27 of 50
Meaning: Rows with safely comparable ownership %
- Latest 13D/G holder
-
Comer James Lamar Walton
Source: Latest parsed Schedule 13D/G stake
- Latest parsed ownership date
-
21 Sep 2026
Freshness: Most recent filing date in this holder set
- Issuer CIK
- 0001419275
- Issuer location
- San Diego, 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 RTB Digital, 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
Comer James Lamar Walton
Disclosed value leader
GreenBox POS LLC
Comparable rows
27/50
Latest evidence
21 Sep 2026
13D/G
3/4/5
13F
Lead comparable stake: 32%
23 rows are not safely comparable across share classes.
13D/G row: Comer James Lamar Walton
Showing 1-8 of 50 holder rows.
Quick read
Comer James Lamar Walton leads the comparable SEC ownership view at 32%.
27 of 50 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 Comer James Lamar Walton's linked filing trail.
Comparable ownership
Top 5
Comer James Lamar Walton
32%
Jason Christopher Dorsett
30%
RTB DIGITAL INC.
17%
Dawson Wendy Rae
7.8%
S8 Global Fintech & Regtech Fund
25%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-8 of 50 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| Comer James Lamar Walton |
13D/G
3/4/5
Director
|
32%
|
$720,684
4,504,276 shares
|
$0 | 12 May 2026 |
| Jason Christopher Dorsett |
13D/G
3/4/5
Dorsett Jason Christopher · 10%+ Owner
|
30%
|
$54,610,324
4,204,028 shares
|
+$142,890 | 21 Sep 2026 |
| RTB DIGITAL INC. |
13D/G
3/4/5
10%+ Owner
|
17%
|
$2,376,690
7,202,092 shares
|
-$1,748,310 | 29 Oct 2025 |
| Dawson Wendy Rae |
13D/G
|
7.8%
|
$825,000
1,250,000 shares
|
+$99,000 | 21 Jul 2025 |
| S8 Global Fintech & Regtech Fund |
3/4/5
10%+ Owner
|
25%
|
$1,282,964
3,604,845 shares
|
— | 16 Jul 2025 |
| David F. Bailey |
3/4/5
Director
|
2.9%
|
$121,502
418,972 shares
|
— | 21 May 2026 |
| James C. Heckman |
3/4/5
Chief Executive Officer, Director
|
1.8%
|
$75,381
259,933 shares
|
— | 21 May 2026 |
| William Carrier Sornsin Jr. |
3/4/5
Chief Operating Officer
|
0.9%
|
$36,921
127,314 shares
|
— | 21 May 2026 |
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 buying over the last 12 months. Net value: +$288,360.
Buys
$288,360
Insiders: 1
Sells
$0
Insiders: 0
Net
+$288,360
Shares: +30,000
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 30,000
Shares: 0
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 30,000 | 0 | $288,360 | $0 | +$288,360 |
| 3-6 | 0 | 0 | $0 | $0 | $0 |
| 6-9 | 0 | 0 | $0 | $0 | $0 |
| 9-12 | 0 | 0 | $0 | $0 | $0 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-20 of 35 reporting-owner rows connected to RTB Digital, Inc.. Open a relationship link for the CIK-to-CIK filing trail.
Rows
35
Largest Forms 3/4/5 holder
GreenBox POS LLC
Net 12M change
+$288,360
Latest report
21 Sep 2026
Recent insider transactions for RTB Digital, 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| Jason Christopher Dorsett | RTB | Common Stock | Purchase | 0.26% | $91,520 | $8.32 | 11,000 | 4,204,028 | 21 Sep 2026 | Direct |
| Jason Christopher Dorsett | RTB | Common Stock | Purchase | 0.46% | $196,840 | $10.36 | 19,000 | 4,193,028 | 17 Sep 2026 | Direct |
| Alykhan Madhavji | RTB | Common Stock par value $0.001 | Options Exercise | 166.7% | 145,881 | 233,410 | 04 Jun 2026 | BFF Ltd. | ||
| Alykhan Madhavji | RTB | Stock Options | Options Exercise | -44.4% | -145,881 | 182,351 | 04 Jun 2026 | BFF Ltd. | ||
| Steven C. Fletcher | RTB | Common Stock par value $0.001 | Other | 690 | 690 | 21 May 2026 | Direct |
* marks a reported price that did not pass the local price check.