AMERICAN CAPITAL MANAGEMENT INC
Long book
$1.86B
Q1 2026
Positions
75
Top-10 weight
43%
concentration
Last quarter
+24.0%
SPY +14.8%
Turnover
14%
of book per quarter
Strategy in plain words
auto-generated from filingsAMERICAN CAPITAL MANAGEMENT INC is a diversified fundamental manager, running a $1.86B US long book across 75 positions.
The portfolio is moderately concentrated (top 10 ≈ 43% of the book). Turnover is modest: positions are typically held for years. Current anchor positions: MEDPACE HOLDINGS INC, PALO ALTO NETWORKS INC, RBC BEARINGS INC, IDEXX LABORATORIES INC, AEROVIRONMENT INC.
Over the last 9 quarters its long book ran on average 2.8pp per quarter behind the S&P 500, beating the index in 3 of 9 quarters. We rate its filings as signal-bearing: position changes reflect genuine views.
Implied long-book return vs S&P 500
methodology: positions priced quarterly, no shorts/options Fund long book S&P 500
Q1 2024
-5.9%
Q2 2024
+6.4%
Q3 2024
-1.5%
Q4 2024
-8.3%
Q1 2025
+16.6%
Q2 2025
+5.8%
Q3 2025
-7.1%
Q4 2025
-14.6%
Q1 2026
+24.0%
Sector allocation
Technology 45%
Healthcare 20%
Industrials 20%
Financials 6%
Materials 5%
Services media 4%
Consumer discretionary 0%
Energy 0%
Long book by quarter
What does AMERICAN CAPITAL own?
Q1 2026 13F| Company | Sector | Shares | Value | % of book | Change |
|---|---|---|---|---|---|
| MEDP MEDPACE HOLDINGS INC | Healthcare | 217.9K | $104.7M | 5.6% | -2.9% |
| PANW PALO ALTO NETWORKS INC | Technology | 624.1K | $100.1M | 5.4% | New |
| RBC RBC BEARINGS INC | Industrials | 175.4K | $95.3M | 5.1% | -18.1% |
| IDXX IDEXX LABORATORIES INC | Materials | 166.1K | $93.3M | 5.0% | -8.6% |
| AVAV AEROVIRONMENT INC | Industrials | 436.4K | $79.9M | 4.3% | -32.6% |
| KTOS KRATOS DEFENSE & SECURITY | Industrials | 1.1M | $75.6M | 4.1% | -34.4% |
| FTNT FORTINET INC | Technology | 828.9K | $67.7M | 3.6% | -10.5% |
| SEIC SEI INVESTMENTS COMPANY | Financials | 768.6K | $60.3M | 3.2% | +33.7% |
| RMD RESMED INC | Healthcare | 265.4K | $59.6M | 3.2% | -13.5% |
| GMED GLOBUS MEDICAL INC - A | Healthcare | 663.0K | $57.1M | 3.1% | +36.4% |
| TECH BIO-TECHNE CORP | Healthcare | 1.0M | $53.4M | 2.9% | +8.5% |
| CGNT COGNYTE SOFTWARE LTD | Technology | 6.5M | $52.6M | 2.8% | -3.2% |
| VRNS VARONIS SYSTEMS INC | Technology | 2.3M | $50.0M | 2.7% | +54.3% |
| RAMP LIVERAMP HOLDINGS INC | Technology | 1.9M | $49.4M | 2.7% | -0.8% |
| GWRE GUIDEWIRE SOFTWARE INC | Technology | 324.2K | $48.5M | 2.6% | -0.4% |
| MANH MANHATTAN ASSOCIATES INC | Technology | 357.8K | $47.6M | 2.6% | -2.5% |
| NOVT NOVANTA INC | Technology | 373.9K | $44.2M | 2.4% | -2.1% |
| RGEN REPLIGEN CORP | Healthcare | 357.7K | $42.1M | 2.3% | +6.7% |
| CVLT COMMVAULT SYSTEMS INC | Technology | 540.8K | $42.1M | 2.3% | +1.3% |
| DT DYNATRACE INC | Technology | 1.1M | $39.0M | 2.1% | New |
| JKHY JACK HENRY & ASSOCIATES INC | Technology | 243.1K | $38.4M | 2.1% | -3.3% |
| VEEV VEEVA SYSTEMS INC-CLASS A | Technology | 206.2K | $36.2M | 1.9% | -7.3% |
| PRLB PROTO LABS INC | Industrials | 627.7K | $35.8M | 1.9% | -0.6% |
| NCNO NCINO INC | Technology | 2.4M | $35.6M | 1.9% | +17.1% |
| TYL TYLER TECHNOLOGIES INC | Technology | 98.9K | $33.9M | 1.8% | +348.9% |
| CSGP COSTAR GROUP INC | Services media | 825.3K | $33.3M | 1.8% | 0.0% |
| TW TRADEWEB MARKETS INC-CLASS A | Financials | 249.2K | $29.3M | 1.6% | -3.7% |
| BMI BADGER METER INC | Technology | 185.8K | $28.3M | 1.5% | New |
| AZTA AZENTA INC | Industrials | 1.3M | $27.4M | 1.5% | +26.9% |
| IPGP IPG PHOTONICS CORP | Technology | 208.9K | $23.9M | 1.3% | -11.3% |
| AAON AAON INC | Industrials | 276.9K | $22.9M | 1.2% | +1.9% |
| MORN MORNINGSTAR INC | Financials | 108.3K | $18.3M | 1.0% | -4.2% |
| NEO NEOGENOMICS INC | Services media | 2.3M | $16.7M | 0.9% | -3.2% |
| STAA STAAR SURGICAL CO | Healthcare | 878.0K | $16.4M | 0.9% | +18.7% |
| CRNC CERENCE INC | Technology | 2.5M | $15.9M | 0.9% | -5.1% |
| DXCM DEXCOM INC | Healthcare | 251.5K | $15.8M | 0.8% | +1.1% |
| VSEC VSE CORP | Services media | 84.8K | $15.6M | 0.8% | +1027.1% |
| CGNX COGNEX CORP | Technology | 271.5K | $13.3M | 0.7% | -25.5% |
| GNTX GENTEX CORP | Industrials | 534.4K | $11.7M | 0.6% | -7.9% |
| ESE ESCO TECHNOLOGIES INC | Technology | 38.4K | $10.8M | 0.6% | New |
| FDS FACTSET RESEARCH SYSTEMS INC | Technology | 43.0K | $9.3M | 0.5% | -68.1% |
| MMSI MERIT MEDICAL SYSTEMS INC | Healthcare | 115.8K | $8.0M | 0.4% | +24.4% |
| ORLY O'REILLY AUTOMOTIVE INC | Consumer discretionary | 86.2K | $8.0M | 0.4% | Held |
| SNPS SYNOPSYS INC | Technology | 19.5K | $7.7M | 0.4% | -4.8% |
| QLYS QUALYS INC | Technology | 83.8K | $7.4M | 0.4% | -79.3% |
| MPWR MONOLITHIC POWER SYSTEMS INC | Technology | 6.3K | $6.9M | 0.4% | -2.6% |
| DORM DORMAN PRODUCTS INC | Industrials | 60.4K | $6.3M | 0.3% | +196.1% |
| KWR QUAKER CHEMICAL CORPORATION | Energy | 38.6K | $4.8M | 0.3% | +47.8% |
| SPSC SPS COMMERCE INC | Technology | 86.1K | $4.8M | 0.3% | -71.9% |
| KRNT KORNIT DIGITAL LTD | Industrials | 283.0K | $4.1M | 0.2% | -0.6% |
13F filing history
| Period | Form | Filed | Entries | Reported value | Flags | Source |
|---|---|---|---|---|---|---|
| Q1 2026 | 13F-HR | May 15, 2026 | 75 | $1.86B | canonical | SEC ↗ |
| Q4 2025 | 13F-HR | Feb 17, 2026 | 68 | $2.27B | canonical | SEC ↗ |
| Q3 2025 | 13F-HR | Nov 14, 2025 | 68 | $2.51B | canonical | SEC ↗ |
| Q2 2025 | 13F-HR | Aug 14, 2025 | 63 | $2.41B | canonical | SEC ↗ |
| Q1 2025 | 13F-HR | May 15, 2025 | 63 | $2.46B | canonical | SEC ↗ |
| Q4 2024 | 13F-HR | Feb 11, 2025 | 63 | $2.69B | canonical | SEC ↗ |
| Q3 2024 | 13F-HR | Nov 14, 2024 | 61 | $3.06B | canonical | SEC ↗ |
| Q2 2024 | 13F-HR | Aug 14, 2024 | 62 | $2.99B | canonical | SEC ↗ |
| Q1 2024 | 13F-HR | May 15, 2024 | 64 | $3.12B | canonical | SEC ↗ |
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