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SC 13G ·Filed Oct 8, 2026

MMS

MAXIMUS, INC.
NEUTRAL
Impact 4/10
Horizonweeks Processed18d 7h ago SEC0000354204-26-001091
Passive investor 5%+ stake
Actionable Insight • Neutral

Monitor for any future conversion of this 13G to a 13D, which would signal activist intent. The clustering of multiple large passive 13G filings within six months suggests steady institutional accumulation, but no near-term catalyst is present.

DirectionNeutral
Confidencehigh
Horizonweeks
Latest settled — T+5d
MMS ▲ +2.50% at T+5d
NEUTRAL call +2.50% · α vs SPY +2.78% · entry $58.77 → $60.24
Next anchor: T+20d in 9d
Latest observation: T+11 +4.56% FF3 residual α
Entry = T+0 close
Oct 8, 2026
via day close
T+1d
+1.05%
call +1.05% · α +0.46%
$59.39
settled 18d ago
T+5d
+2.50%
call +2.50% · α +2.78%
$60.24
settled 12d ago
T+20d
Pending
in 9d
T+60d
Pending
in 2mo

Price Chart

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Executive Summary

Dimensional Fund Advisors LP disclosed a 5.1% passive stake in MAXIMUS, INC. via a Schedule 13G filed on October 8, 2026, reporting beneficial ownership of 2,666,222 common shares as of September 30, 2026. This is a new filing by Dimensional, adding to a series of recent 13G filings by other large passive investors (Fuller & Thaler, Fidelity, Vanguard) over the past several months, indicating broad institutional accumulation.

Key Financial Metrics

Stake
5.1%
Investor
Dimensional Fund Advisors LP
Investor Type
mutual fund

Key Facts

  • Dimensional Fund Advisors LP filed a Schedule 13G on 2026-10-08 disclosing a 5.1% passive stake in MAXIMUS, INC.
  • Dimensional reported beneficial ownership of 2,666,222 common shares as of September 30, 2026.
  • Dimensional has sole voting power over 2,606,162 shares and sole dispositive power over 2,666,222 shares.
  • The filing is made under Rule 13d-1(b), confirming passive intent with no control influence.
  • This follows recent 13G filings by Fuller & Thaler Asset Management (Aug 2026), Fidelity (Aug 2026), and Vanguard (Apr 2026), all disclosing 5%+ passive stakes.

Financial Impact

5.1% of outstanding shares held by Dimensional Fund Advisors LP; no transaction value disclosed.

ownership

Risk Factors

  • Dimensional could reduce its stake without further disclosure until below 5%.
  • No indication of activist intent; passive filing limits near-term price impact.

Investment Themes

Software & IT

Documents Analyzed

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

DocumentAccession Number
SC 13G Filing (Primary)0000354204-26-001091
Document: 0000354204-26-001091-index.html0000354204-26-001091
Document: 0000354204-26-001091.txt0000354204-26-001091
10 reports for MMS
Performance horizon
100% Hit rate @ T+1 3 of 3 directional calls Went positive at some point 3 of 3 best @ T+5▲ +5.61%Apr 1, 2026
Filters
Rows
Reports for MMS — sortable, filterable
TypeNow
Oct 21, 2026
5d ago
Institutional Cluster
NEUTRAL ★ 2/10
$63.38 $63.02▼ −0.57%▼ −0.05%$63.50 (+0.19%)
Oct 20, 2026
6d ago
8-K
BULLISH ★ 6/10
$61.09 $62.07▲ +1.60%▲ +1.08%$63.50 (+3.94%)
Oct 8, 2026
18d ago
SC 13G
NEUTRAL ★ 4/10
$58.77 $59.39▲ +1.05%▲ +0.46%$63.50 (+8.05%)
Sep 10, 2026
6w ago
GOVT-CONTRACT
BULLISH ★ 5/10
$56.92 $59.35▲ +4.27%▲ +4.72%$63.50 (+11.56%)
Sep 4, 2026
7w ago
GOVT-CONTRACT
NEUTRAL ★ 3/10
$56.33 $56.11▼ −0.39%▲ +0.07%$63.50 (+12.73%)
Aug 24, 2026
9w ago
GOVT-CONTRACT
NEUTRAL ★ 3/10
$58.53 $58.97▲ +0.75%▲ +0.73%$63.50 (+8.49%)
Jul 29, 2026
12w ago
GOVT-CONTRACT
NEUTRAL ★ 4/10
$60.64 $60.25▼ −0.64%▼ −1.36%$63.50 (+4.72%)
May 7, 2026
24w ago
8-K
MIXED ★ 6/10
$66.66 $64.27▼ −3.59%▼ −4.42%$63.50 (−4.74%)
Apr 1, 2026
29w ago
GOVT-CONTRACT
BULLISH ★ 7/10
$61.67 $63.00▲ +2.15%▲ +1.68%$63.50 (+2.97%)
Dec 5, 2025
46w ago
Court Ruling
NEUTRAL ★ 1/10
$82.03 $80.52▼ −1.85%▼ −1.76%$63.50 (−22.59%)
Showing 10 of 10

US Market Status

Market Closed — Opens Wed (11h 8m)

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Report published Oct 8, 2026