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SC 13D/A ·Filed Sep 29, 2026

ATER

Aterian, Inc.
BEARISH
Impact 7/10
Horizonweeks Processed26d 23h ago SEC0001829126-26-010591
Activist stake amendment (position change)
Actionable Insight ▼ Bearish

The activist director's complete exit and transfer of control to a new group of offshore investors, combined with the Nasdaq bid price deficiency, creates significant uncertainty. Monitor for the new board appointment, any potential reverse stock split to regain Nasdaq compliance, and the new investors' intentions regarding the company's direction. The 90-day indemnity holdback period ending ~December 24, 2026, is a near-term milestone.

DirectionBearish
Confidencehigh
Horizonweeks
Latest settled — T+5d
ATER ▲ +4.14% at T+5d
SHORT call ✗ call lost -4.14% · α vs SPY -2.23% · entry $0.5866 → $0.6109
Next anchor: T+20d in 11h
Latest observation: T+17 -35.64% FF3 residual α
Entry = T+0 close
Sep 29, 2026
via day close
T+1d
+3.92%
call -3.92% · α -3.74%
$0.6096
settled 27d ago
T+5d
+4.14%
call -4.14% · α -2.23%
$0.6109
settled 21d ago
T+20d
Pending
in 11h
T+60d
Pending
in 8w

Price Chart

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Executive Summary

David E. Lazar, the activist director of Aterian, filed an exit amendment to his Schedule 13D, reporting that he sold substantially all of his convertible preferred shares to a group of 19 non-U.S. purchasers for $12 million, and converted his remaining 168,900 Series AA shares into 1,300,530 common shares. As a result, Lazar's beneficial ownership dropped from a controlling position to 3.1% of common stock, and he ceased to be a >5% holder on September 25, 2026. This represents a complete de-escalation and exit by the activist, transferring effective control to a new group of offshore investors who now hold ~92.5% of the fully diluted common stock.

Key Financial Metrics

Stake
3.1%
Investor
David E. Lazar

Key Facts

  • Lazar sold 706,100 Series AA and 1,750,000 Series AAA preferred shares to 19 non-U.S. purchasers for $12 million total.
  • The sold preferred shares are convertible into 241,861,970 common shares, representing ~92.5% of the fully diluted outstanding common stock.
  • Lazar converted his remaining 168,900 Series AA shares into 1,300,530 common shares on September 24, 2026.
  • Lazar's beneficial ownership dropped to 8,038,030 common shares (3.1% of 261,129,410 shares outstanding).
  • The filing states this is an 'exit filing' as Lazar ceased to beneficially own more than 5% on September 25, 2026.
  • The purchasers obtained the right to appoint one board member and have one other director resign as a condition of the sale.
  • Aterian received a Nasdaq bid price deficiency notice on September 2, 2026, with a 180-day cure period ending March 1, 2027.

Financial Impact

Lazar received $12 million for the preferred shares. The purchasers now control ~92.5% of the fully diluted common stock, representing a de facto change of control at a micro-cap company with a market cap of ~$13.4 million as of June 30, 2025.

ownership concentrationboard compositiondilutionstock price

Risk Factors

  • Potential delisting from Nasdaq if the bid price remains below $1.00 beyond March 1, 2027.
  • Massive dilution risk: the new investors' convertible preferred shares represent ~92.5% of the fully diluted common stock, which could flood the market if converted and sold.
  • Uncertainty around the new controlling shareholders' intentions and strategy for the company.
  • The company's micro-cap status and recent asset sale suggest limited ongoing business operations, increasing vulnerability.

Investment Themes

Consumer & Retail

Documents Analyzed

This report is based on 4 SEC documents filed with EDGAR.

DocumentAccession Number
SC 13D/A Filing (Primary)0001829126-26-010591
Document: 0001829126-26-010591-index-headers.html0001829126-26-010591
Document: 0001829126-26-010591-index.html0001829126-26-010591
Document: 0001829126-26-010591.txt0001829126-26-010591
17 reports for ATER
Performance horizon
71% Hit rate @ T+5 5 of 7 directional calls Went positive at some point 6 of 7 best @ T+5▲ +65.00%Jul 20, 2026
Filters
Rows
Reports for ATER — sortable, filterable
TypeNow
Oct 23, 2026
3d ago
8-K
NEUTRAL ★ 3/10
$0.6300awaiting T+5—$0.6230 (−1.11%)
Oct 5, 2026
21d ago
8-K
BEARISH ★ 7/10
$0.6425 $0.5705▲ +11.21%▲ +11.07%$0.6230 (+3.04%)
Oct 2, 2026
24d ago
SC 13D
BEARISH ★ 7/10
$0.6356 $0.6076▲ +4.41%▲ +4.83%$0.6230 (+1.98%)
Oct 2, 2026
24d ago
SC 13D
BEARISH ★ 7/10
$0.6356 $0.6076▲ +4.41%▲ +4.83%$0.6230 (+1.98%)
Sep 29, 2026
26d ago
SC 13D/A
BEARISH ★ 7/10
$0.5866 $0.6109▼ −4.14%▼ −2.23%$0.6230 (−6.21%)
Jul 29, 2026
12w ago
3
NEUTRAL ★ 1/10
$0.3900 $0.4610▲ +18.21%▲ +14.58%$0.6230 (+59.74%)
Jul 20, 2026
14w ago
S-3
BEARISH ★ 6/10
$1.03 $0.3605▲ +65.00%▲ +63.77%$0.6230 (+39.51%)
Jul 13, 2026
15w ago
DEFA14A
MIXED ★ 6/10
$1.19 $1.30▲ +9.24%▲ +10.03%$0.6230 (−47.65%)
Jul 8, 2026
15w ago
Press Release
BULLISH ★ 6/10
$1.19 $1.28▲ +7.56%▲ +7.69%$0.6230 (−47.65%)
Jul 6, 2026
16w ago
DEFA14A
NEUTRAL ★ 5/10
$1.31 $1.15▼ −12.21%▼ −12.70%$0.6230 (−52.44%)
Showing 10 of 17

US Market Status

Market Closed — Opens Wed (12h 40m)

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Report published Sep 29, 2026