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SC 13G/A ·Filed Oct 5, 2026

QNTM

Quantum Biopharma Ltd.
NEUTRAL
Impact 3/10
Horizonweeks Processed21d 20h ago SEC0000929638-26-003843
Passive stake amendment
Actionable Insight • Neutral

Monitor for any future increase above 5%, which would require a Schedule 13D filing and could signal a shift to activist intent. The current sub-5% position suggests the fund is deliberately avoiding that threshold.

DirectionNeutral
Confidencemedium
Horizonweeks
Latest settled — T+5d ⚠ clustered
QNTM ▼ -13.76% at T+5d
NEUTRAL call -13.76% · α vs SPY -14.18% · entry $3.27 → $2.82
Next anchor: T+20d in 6d
Latest observation: T+14 -32.89% FF3 residual α
Entry = T+0 close
Oct 5, 2026
via day close
T+1d
-5.50%
call -5.50% · α -6.05%
$3.09
settled 21d ago
T+5d
-13.76%
call -13.76% · α -14.18%
$2.82
settled 15d ago
T+20d
Pending
in 6d
T+60d
Pending
in 2mo

Price Chart

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Executive Summary

AdvisorShares Trust filed an amended Schedule 13G disclosing a 4.95% passive stake in Quantum Biopharma Ltd. as of September 30, 2026, holding 400,378 Class B Subordinate Voting Shares. The filing indicates no change in the fund's passive intent, but the stake is just below the 5% threshold, suggesting a deliberate cap to avoid triggering a 13D filing.

Key Financial Metrics

Stake
4.95%
Investor
AdvisorShares Trust
Investor Type
mutual fund

Key Facts

  • AdvisorShares Trust holds 400,378 Class B Subordinate Voting Shares of Quantum Biopharma Ltd.
  • Stake represents 4.95% of the outstanding shares, just under the 5% reporting threshold.
  • Filing is an amendment to a prior Schedule 13G, confirming passive investment intent.
  • No change in ownership amount or percentage is indicated compared to the prior filing.

Financial Impact

No financial impact — stake is unchanged and remains passive.

Risk Factors

  • If AdvisorShares Trust converts to a 13D filer, it could signal activist pressure on the company.
  • A decrease in the stake below 4.95% would indicate reduced conviction.

Investment Themes

Documents Analyzed

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

DocumentAccession Number
SC 13G/A Filing (Primary)0000929638-26-003843
Document: 0000929638-26-003843-index.html0000929638-26-003843
Document: 0000929638-26-003843.txt0000929638-26-003843
30 reports for QNTM
Performance horizon
44% Hit rate @ T+20 4 of 9 directional calls Went positive at some point 6 of 9 best @ T+1▲ +52.58%Mar 23, 2026
Filters
Rows
Reports for QNTM — sortable, filterable
TypeNow
Oct 8, 2026
18d ago
6-K
NEUTRAL ★ 4/10
$3.11awaiting T+20—$2.21 (−28.94%)
Oct 6, 2026
21d ago
6-K
NEUTRAL ★ 4/10
$3.09awaiting T+20—$2.21 (−28.48%)
Oct 6, 2026
21d ago
Press Release
NEUTRAL ★ 4/10
$3.09awaiting T+20—$2.21 (−28.48%)
Oct 5, 2026
21d ago
SC 13G/A
NEUTRAL ★ 3/10
$3.27awaiting T+20—$2.21 (−32.42%)
Sep 24, 2026
4w ago
6-K
NEUTRAL ★ 3/10
$4.00 $2.27▼ −43.25%▼ −42.83%$2.21 (−44.75%)
Sep 17, 2026
5w ago
6-K
NEUTRAL ★ 4/10
$3.72 $2.71▼ −27.15%▼ −28.36%$2.21 (−40.59%)
Sep 17, 2026
5w ago
6-K
NEUTRAL ★ 3/10
$3.72 $2.71▼ −27.15%▼ −28.36%$2.21 (−40.59%)
Sep 15, 2026
5w ago
6-K
NEUTRAL ★ 2/10
$3.46 $2.89▼ −16.47%▼ −19.45%$2.21 (−36.13%)
Sep 1, 2026
7w ago
6-K
NEUTRAL ★ 3/10
$3.08 $3.60▲ +16.88%▲ +17.21%$2.21 (−28.25%)
Sep 1, 2026
7w ago
Press Release
NEUTRAL ★ 3/10
$3.08 $3.60▲ +16.88%▲ +17.21%$2.21 (−28.25%)
Showing 10 of 30

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Report published Oct 5, 2026