13F Insight
DOSSIER · 13F-HR · Q1 2026

AMERICAN CAPITAL MANAGEMENT INC

$1.9B in tracked AUM across 75 positions as of Q1 2026.

AC
CIK 0001320168 · last filed Mar 31, 2026
Total AUM
$1.9B
as of Q1 2026
Holdings
75
—
positions
Whale Score
65
65
tracked
Activity
—
no data
changes this Q
AI Analysis · Q1 2026

AMERICAN CAPITAL MANAGEMENT INC filed its latest 13F-HR for Q1 2026. See the latest holdings and position changes below.

Quarter at a glance — Q1 2026

Position-change comparison pending.

No quarter-over-quarter changes available.

Top 10 holdings

By portfolio weight as of Q1 2026.

#HoldingValueSharesWeight
01
MEDP
MEDPACE HOLDINGS INC
$105M218K5.6%02
PANW
PALO ALTO NETWORKS INC
$100M624K5.4%03
RBC
RBC BEARINGS INC
$95M175K5.1%04
IDXX
IDEXX LABORATORIES INC
$93M166K5.0%05
AVAV
AEROVIRONMENT INC
$80M436K4.3%06
KTOS
KRATOS DEFENSE & SECURITY SOLUTIONS INC
$76M1.1M4.1%07
34959E109
FORTINET INC
$68M829K3.6%08
SEIC
SEI INVESTMENTS CO
$60M769K3.2%09
RMD
RESMED INC
$60M265K3.2%10
GMED
GLOBUS MEDICAL INC
$57M663K3.1%

Filing history

2026Q1Mar 31
$1.9B▼ 17.8%
75 positionsView →2025Q4Dec 31
$2.3B▼ 9.7%
68 positionsView →2025Q3Sep 30
$2.5B▲ 4.1%
68 positionsView →2025Q2Jun 30
$2.4B▼ 1.9%
63 positionsLocked2025Q1Mar 31
$2.5B▼ 8.5%
63 positionsLocked2024Q4Dec 31
$2.7B▼ 12.2%
63 positionsLocked2024Q3Sep 30
$3.1B▲ 2.4%
61 positionsLocked2024Q2Jun 30
$3.0B▼ 4.2%
62 positionsLocked2024Q1Mar 31
$3.1B▲ 6.7%
64 positionsLocked2023Q4Dec 31
$2.9B▲ 12.7%
64 positionsLocked2023Q3Sep 30
$2.6B▼ 9.9%
63 positionsLocked2023Q2Jun 30
$2.9B▲ 1.3%
64 positionsLocked
Showing 12 of 84