AMERICAN CAPITAL MANAGEMENT INC

Long Only Manager

AMERICAN CAPITAL MANAGEMENT INC is a Long Only Manager based in New York, NY led by David Mark La Valle, reporting $3.3B in AUM as of Q3 2025 with 40% Technology concentration, 50% concentrated in top 10 holdings, and 40% technology allocation.

CEODavid Mark La Valle

Portfolio Value: $2.5B
Positions: 68
Top Holding: AVAV at 9.05%
Last Reported: Q3 2025

Address575 Lexington Avenue, 30th Floor, New York, NY, 10022-3212, United States

Top Holdings

Largest long holdings in AMERICAN CAPITAL MANAGEMENT INC's portfolio (50% of total portfolio)

See all holdings

GthenH

Holding	Sector	Position	Weight	Traded	Ownership	Owned Since
1 AeroVironment AVAV	Aerospace & Defense Industrials	$227.1M	9.05%	-$11.4M Sold	1.44% 721.1K shares	≤ Q2 2013 Held for 12y 5m+
2 Kratos Defense & Security Solutions KTOS	Aerospace & Defense Industrials	$183.7M	7.32%	-$26.0M Sold	1.19% 2.0M shares	Q1 2020 Held for 5y 8m
3 CyberArk Software CYBR	Software - Infrastructure Technology	$169.1M	6.74%	-$32.7M Sold	0.69% 350.0K shares	Q4 2016 Held for 8y 11m
4 Medpace Holdings, Inc. MEDP	Medical - Diagnostics & Research Healthcare	$127.9M	5.10%	-$8.6M Sold	0.89% 248.8K shares	Q1 2020 Held for 5y 8m
5 Idexx Laboratories IDXX	Medical - Diagnostics & Research Healthcare	$117.7M	4.69%	-$3.0M Sold	0.23% 184.3K shares	≤ Q2 2013 Held for 12y 5m+
6 Commvault Systems CVLT	Software - Application Technology	$100.9M	4.02%	-$3.5M Sold	1.20% 534.4K shares	Q2 2014 Held for 11y 5m
7 ResMed RMD	Medical - Instruments & Supplies Healthcare	$85.1M	3.39%	-$1.9M Sold	0.21% 310.9K shares	≤ Q2 2013 Held for 12y 5m+
8 RBC Bearings RBC	Manufacturing - Tools & Accessories Industrials	$85.0M	3.39%	+$1.3M Bought	0.69% 217.8K shares	Q4 2018 Held for 6y 11m
9 Fortinet FTNT	Software - Infrastructure Technology	$81.0M	3.23%	-$4.0M Sold	0.13% 963.4K shares	Q4 2013 Held for 11y 11m
10 Varonis Systems VRNS	Software - Infrastructure Technology	$78.8M	3.14%	+$11.0M Bought	1.22% 1.4M shares	Q4 2022 Held for 2y 11m

See all holdings

GthenH

Changes

Portfolio activity, position movements, and quarter-over-quarter changes in AMERICAN CAPITAL MANAGEMENT INC's latest filing

See all changes

GthenC

Market Value

$2.5B

Prior: $2.4B

Q/Q Change

+4.12%

+$99.2M

Net Flows % of MV

-2.81%

Turnover Ratio

6.07%

New Purchases

3 stocks

$55.2M

Added To

18 stocks

+$56.3M

Sold Out Of

1 stocks

$35.1M

Reduced Holdings

37 stocks

-$147.0M

Increased Positions

Position	Shares Δ	Change
1 Aaon AAON	New	0 → 244.4K +$22.8M
2 Novanta NOVT	New	0 → 218.9K +$21.9M
3 Synopsys SNPS	New	0 → 21.2K +$10.5M
4 Proto Labs PRLB	+416.96%	54.0K → 279.3K +$11.3M
5 NeoGenomics NEO	+120.86%	1.1M → 2.3M +$9.9M

Decreased Positions

Position	Shares Δ	Change
1 Ansys ANSS	Sold	99.9K → 0 −$35.1M
2 Blackbaud BLKB	-74.01%	52.9K → 13.8K −$2.5M
3 Icon ICLR	-50.39%	49.2K → 24.4K −$4.3M
4 Neogen NEOG	-50.11%	3.3M → 1.7M −$9.6M
5 Haemonetics HAE	-26.26%	100.9K → 74.4K −$1.3M