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SC 13D/A ·Filed Sep 21, 2026

RTB

RTB Digital, Inc.
NEUTRAL
Impact 5/10
Horizonweeks Processed1mo ago SEC0002146263-26-000004
Activist stake amendment (position change)
Actionable Insight • Neutral

The activist's stake remains large but static at 29.9% with no new demands. Monitor for any future 13D amendments that signal escalation, such as board representation demands or strategic review requests, especially given the recent CEO compensation formalization.

DirectionNeutral
Confidencemedium
Horizonweeks
Latest settled — T+20d ⚠ clustered
RTB ▼ -10.90% at T+20d
NEUTRAL call -10.90% · α vs SPY -9.99% · entry $8.44 → $7.52
Next anchor: T+60d in 7w
Latest observation: T+24 +23.55% FF3 residual α
Entry = T+0 close
Sep 21, 2026
via day close
T+1d
+13.15%
call +13.15% · α +13.17%
$9.55
settled 5w ago
T+5d
+10.90%
call +10.90% · α +11.92%
$9.36
settled 29d ago
T+20d
-10.90%
call -10.90% · α -9.99%
$7.52
settled 8d ago
T+60d
Pending
in 7w

Price Chart

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Executive Summary

Jason Christopher Dorsett filed an amended Schedule 13D disclosing beneficial ownership of 4,193,028 shares of RTB Digital, Inc. common stock, representing 29.9% of the outstanding shares. The stake was acquired for investment purposes with personal funds, and no new demands or changes in purpose were stated. This filing updates a prior 13D from June 2026 and follows a recent CEO employment agreement formalization, suggesting the activist is maintaining a large passive position without escalation.

Key Financial Metrics

Stake
29.9%
Investor
Dorsett Jason Christopher

Key Facts

  • Jason Christopher Dorsett beneficially owns 4,193,028 shares of RTB Digital common stock, representing 29.9% of outstanding shares.
  • The shares were acquired with personal funds for investment purposes.
  • No changes in purpose, demands, or intentions were stated in this amendment.
  • This filing updates a prior Schedule 13D filed June 26, 2026, and follows a recent CEO employment agreement (8-K filed September 16, 2026).

Financial Impact

29.9% stake valued at approximately $4.2 million based on share count; no transaction value disclosed.

ownership percentageshare count

Risk Factors

  • Potential for activist escalation if the company's financial performance (per the 10-K) does not improve.
  • Large concentrated ownership could lead to governance changes or a sale process if the activist becomes dissatisfied.

Documents Analyzed

This report is based on 3 SEC documents filed with EDGAR.

DocumentAccession Number
SC 13D/A Filing (Primary)0002146263-26-000004
Document: 0002146263-26-000004-index.html0002146263-26-000004
Document: 0002146263-26-000004.txt0002146263-26-000004
17 reports for RTB
Performance horizon
75% Hit rate @ T+5 3 of 4 directional calls Went positive at some point 4 of 4 best @ T+1▲ +13.15%Sep 18, 2026
Filters
Rows
Reports for RTB — sortable, filterable
TypeNow
Oct 6, 2026
20d ago
8-K
NEUTRAL ★ 4/10
$8.73 $7.62▼ −12.71%▼ −12.58%$7.50 (−14.09%)
Oct 2, 2026
24d ago
8-K
NEUTRAL ★ 4/10
$8.89 $8.09▼ −9.00%▼ −9.42%$7.50 (−15.64%)
Sep 23, 2026
4w ago
SC 13D/A
NEUTRAL ★ 4/10
$9.84 $8.86▼ −9.96%▼ −9.28%$7.50 (−23.78%)
Sep 23, 2026
4w ago
Insider Buy
BULLISH ★ 6/10
$9.84 $8.86▼ −9.96%▼ −9.28%$7.50 (−23.78%)
Sep 22, 2026
4w ago
8-K
BEARISH ★ 6/10
$9.84 $8.86▲ +9.96%▲ +9.28%$7.50 (+23.78%)
Sep 22, 2026
4w ago
8-K
NEUTRAL ★ 5/10
$9.55 $9.43▼ −1.26%▼ −0.07%$7.50 (−21.47%)
Sep 21, 2026
5w ago
SC 13D/A
NEUTRAL ★ 5/10
$8.44 $9.36▲ +10.90%▲ +11.92%$7.50 (−11.14%)
Sep 21, 2026
5w ago
Insider Buy
BULLISH ★ 5/10
$8.44 $9.36▲ +10.90%▲ +11.92%$7.50 (−11.14%)
Sep 18, 2026
5w ago
8-K
BULLISH ★ 7/10
$8.44 $9.36▲ +10.90%▲ +11.92%$7.50 (−11.14%)
Sep 18, 2026
5w ago
8-K
NEUTRAL ★ 3/10
$8.02 $10.27▲ +28.05%▲ +26.79%$7.50 (−6.48%)
Showing 10 of 17

US Market Status

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Report published Sep 21, 2026