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144 ·Filed Apr 8, 2026

ACET

Adicet Bio, Inc.
NEUTRAL
Impact 3/10
Horizondays Processed6mo ago SEC0000947871-26-000417
Form 144 — notice of proposed sale of securities
Actionable Insight • Neutral

Monitor for actual sale execution in upcoming days; while the dollar amount is relatively small compared to ACET's $62M market cap, any insider-initiated selling in a microcap biotech could signal reduced conviction ahead of a catalyst or dilutive offering.

DirectionNeutral
Confidencehigh
Horizondays
Final — all horizons settled through T+60d ⚠ clustered
ACET ▲ +32.22% at T+60d
NEUTRAL call +32.22% · α vs SPY +21.43% · entry $6.86 → $9.07
Entry = T+0 close
Apr 8, 2026
via day close
T+1d
-1.46%
call -1.46% · α -1.40%
$6.76
settled 7mo ago
T+5d
+17.35%
call +17.35% · α +14.16%
$8.05
settled 7mo ago
T+20d
+24.64%
call +24.64% · α +17.07%
$8.55
settled 6mo ago
T+60d
+32.22%
call +32.22% · α +21.43%
$9.07
settled 4mo ago

Price Chart

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Executive Summary

OrbiMed Advisors Israel II Ltd, acting on behalf of fund OrbiMed Israel Partners II, L.P., filed a Form 144 to notify intent to sell up to 40,416 shares of Adicet Bio common stock. The sale would occur on or after the filing date of April 8, 2026, through the Nasdaq Stock Market.

Key Facts

  • Reporting entity: OrbiMed Advisors Israel II Ltd (acting for OrbiMed Israel Partners II, L.P.)
  • Subject company: Adicet Bio, Inc. (ACET)
  • Number of shares proposed for sale: 40,416
  • Share type: Common Stock
  • Acquisition date: September 15, 2020, via merger
  • Planned sale method: Open market or privately negotiated transaction via Themis Trading LLC
  • Filing date: April 8, 2026

Financial Impact

Approximately $2.65 million based on current market price of $65.57 per share (40,416 shares × $65.57)

insider ownershippotential near-term supply

Risk Factors

  • Potential downward pressure on stock price if sale is executed in a short timeframe
  • Perception of negative sentiment from a long-standing institutional holder exiting part of its position

Market Snapshot

Exchange
Nasdaq
Sector
Pharmaceutical Preparations

Investment Themes

Documents Analyzed

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

DocumentAccession Number
144 Filing (Primary)0000947871-26-000417
Document: 0000947871-26-000417-index.html0000947871-26-000417
Document: 0000947871-26-000417.txt0000947871-26-000417
8 reports for ACET
Performance horizon

Track record builds as more directional reports settle.

Filters
Rows
Reports for ACET — sortable, filterable
TypeNow
Oct 23, 2026
3d ago
SC 13G
NEUTRAL ★ 3/10
$4.03awaiting T+20—$3.99 (−0.98%)
Sep 28, 2026
28d ago
8-K
BULLISH ★ 7/10
$6.35 $3.94▼ −37.95%▼ −37.92%$3.99 (−37.17%)
Sep 1, 2026
7w ago
8-K
NEUTRAL ★ 5/10
$9.26 $7.12▼ −23.11%▼ −24.29%$3.99 (−56.91%)
May 20, 2026
22w ago
10-K/A
NEUTRAL ★ 2/10
$7.89 $8.23▲ +4.31%▲ +3.98%$3.99 (−49.43%)
May 13, 2026
23w ago
8-K
NEUTRAL ★ 4/10
$8.41 $8.05▼ −4.28%▼ −3.42%$3.99 (−52.56%)
Apr 8, 2026
28w ago
144
NEUTRAL ★ 3/10
$6.86 $8.55▲ +24.64%▲ +17.07%$3.99 (−41.84%)
Apr 7, 2026
28w ago
144
NEUTRAL ★ 3/10
$6.55 $8.51▲ +29.92%▲ +21.38%$3.99 (−39.08%)
Mar 24, 2026
30w ago
EFFECT
NEUTRAL ★ 4/10
$6.69 $8.31▲ +24.22%▲ +15.31%$3.99 (−40.36%)
Showing 8 of 8

US Market Status

Market Closed — Opens Wed (12h 44m)

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Report published Apr 8, 2026