Stocks/Funds/CIK 1320168

AMERICAN CAPITAL MANAGEMENT INC

long-term holder
Quarterly 13F filings · Latest period 2026-03-31 · CIK 1320168
Assets
$1.86B
-24.2% YoY
Holdings
75
Lifetime alpha vs market
-4.30% annual
Average hold time
6.2 yr
median 7.5 yr

Quarterly history

Cum return +112% vs S&P +198% · α -86% lifetimeAUM $1.9B · peak $3.9BFlow $-83M (-4%)2016-062017-122019-062020-122022-062023-122025-062026-03
AUM ($B)fundS&P 500(gap = α)/ Flow in/out

Behavior signals (lifetime)

Dip response
-3.93%
trims when stocks drop
when a holding falls −10%+
Middle response
-0.62%
baseline attrition
Rally response
-7.85%
trims into rallies
when a holding rises +10%+

Top positions · 30

Ticker$ value% portYoYHold time
MEDPMedpace Holdings, Inc.$105M5.6%+57.6%2.0 yr
PANWPalo Alto Networks, Inc.$100M5.4%-6.0%0.3 yr
RBCRBC Bearings Incorporate$95M5.1%+68.8%6.0 yr
IDXXIDEXX Laboratories, Inc.$93M5.0%+33.8%10.5 yr
AVAVAeroVironment, Inc.$80M4.3%+53.6%10.0 yr
KTOSKratos Defense & Securit$76M4.1%+137.5%6.3 yr
FTNTFortinet, Inc.$68M3.6%-15.1%10.3 yr
SEICSEI Investments Company$60M3.2%+2.3%10.3 yr
RMDResMed Inc.$60M3.2%+1.2%10.3 yr
GMEDGlobus Medical, Inc.$57M3.1%+17.7%1.5 yr
TECHBio-Techne Corporation$53M2.9%-10.4%10.5 yr
CGNTCognyte Software Ltd.$53M2.8%+3.8%5.3 yr
VRNSVaronis Systems, Inc.$50M2.7%-46.9%3.5 yr
RAMPLiveRamp Holdings, Inc.$49M2.7%+1.5%7.5 yr
GWREGuidewire Software, Inc.$48M2.6%-20.2%7.0 yr

Portfolio composition (YoY)

Industry mix
Software - Infrastructure18.3%-4.5pp$340M
Software - Application15.3%-4.6pp$285M
Medical - Diagnostics & Research11.6%+1.5pp$217M
Aerospace & Defense9.2%+1.5pp$171M
Medical - Devices7.3%+1.7pp$137M
Hardware, Equipment & Parts5.3%+3.8pp$98M
Manufacturing - Tools & Accessories5.1%+2.1pp$95M
Medical - Instruments & Supplies3.8%+0.5pp$72M
Asset Management3.5%+1.8pp$65M
Semiconductors3.2%+1.9pp$59M
Country
US95.9%+9.7pp
IL4.0%-9.1pp
CA0.1%+0.0pp
Unknown0.0%-0.2pp
IE0.0%-0.5pp
Top 5: 25.4% · Top 10: 42.6% · Top 25: 77.5%

Winners

TickerPrev $PnLYoY %
KTOS$77M+0.11B137.5%
AVAV$113M+0.06B53.6%
MEDP$99M+0.06B57.6%
RBC$74M+0.05B68.8%
IDXX$93M+0.03B33.8%

Losers

TickerPrev $PnLYoY %
CVLT$107M-0.05B-50.6%
CSGP$74M-0.04B-49.1%
VRNS$51M-0.02B-46.9%
FTNT$124M-0.02B-15.1%
MANH$74M-0.02B-23.1%

Top buys this quarter · 15

PANW Palo Alto Networks, Inc.new+$100M
DT Dynatrace, Inc.new+$39M
BMI Badger Meter, Inc.new+$28M
TYL Tyler Technologies, Inc.+$26M
VRNS Varonis Systems, Inc.+$18M
GMED Globus Medical, Inc.+$15M
SEIC SEI Investments Company+$15M
VSEC VSE Corporation+$14M
ESE ESCO Technologies Inc.new+$11M
NCNO nCino, Inc.+$36M

Top sells this quarter · 15

KTOS Kratos Defense & Security Solu$40M
AVAV AeroVironment, Inc.$39M
QLYS Qualys, Inc.$28M
RBC RBC Bearings Incorporated$21M
FDS FactSet Research Systems Inc.$20M
NICE NICE Ltd.$15M
BCPC Balchem Corporation$14M
SPSC SPS Commerce, Inc.$12M
NEOG Neogen Corporation$12M
RMD ResMed Inc.$9M

Quarterly history (TTM returns)

PeriodAUM# PosReturn (1yr)SPY (1yr)Alpha (1yr)Flow
2026-03-31$1.86B75-1.38%+17.59%-18.97%-0.08B
2025-12-31$2.27B68+5.70%+17.72%-12.02%-0.06B
2025-09-30$2.51B68+12.15%+17.52%-5.36%-0.04B
2025-06-30$2.41B63+12.90%+14.94%-2.04%-0.46B
2025-03-31$2.46B63-9.05%+8.30%-17.35%-0.01B
2024-12-31$2.69B63+6.74%+24.89%-18.15%-0.33B
2024-09-30$3.06B61+22.00%+36.04%-14.03%-0.12B
2024-06-30$2.99B62+5.87%+24.49%-18.63%+0.05B
2024-03-31$3.12B64+22.00%+29.62%-7.62%-0.04B
2023-12-31$2.92B64+25.18%+26.18%-1.00%+0.00B
2023-09-30$2.59B63+14.44%+21.57%-7.13%-0.07B
2023-06-30$2.88B64+18.57%+19.42%-0.85%-0.21B
2023-03-31$2.84B62-15.28%-7.82%-7.46%+0.01B
2022-12-31$2.55B61-27.04%-18.17%-8.87%-0.05B
2022-09-30$2.53B63-21.27%-15.51%-5.76%-0.02B
2022-06-30$2.67B63-17.33%-10.62%-6.71%+0.04B