CIK: 0001320168
Total reported value
$1.9B
Reporting period: 2026-03-31 · Number of holdings: 75
AMERICAN CAPITAL MANAGEMENT INC disclosed 75 holdings in its latest 13F filing for the period ending 2026-03-31, with total reported value of $1.9B and a quarterly turnover rate of 46.2%.
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American Capital Management INC's disclosed holdings carry a Herfindahl concentration index of 0.029 — mathematically equivalent to about 34 equally-sized positions, well below its 75 actual disclosed holdings. That gap points to a strategy built around a small core of high-conviction bets rather than broad diversification.
Position sizes are fairly uniform across the portfolio (a coefficient of variation of 1.11), suggesting a disciplined, rules-based approach to how much capital goes into each idea.
No strong tilt toward either adding to existing winners or initiating outsized new positions was observed in the latest reported quarter.
Trim AVAV
-32.6% -$76.8M
Trim QLYS
-79.3% -$46.3M
Trim KTOS
-34.4% -$48.5M
Add TYL
+348.9% $23.9M
Trim FDS
-68.1% -$29.8M
Add GMED
+36.4% $14.7M
| # | Ticker | Issuer | Asset Subclass | Weight | Weight Change | Shares Change | 4Q Trend |
|---|---|---|---|---|---|---|---|
| 1 | MEDP | Medpace Holdings INC | Stock-Healthcare | 5.62% | +0.06% | -2.86% | |
| 2 | PANW | Palo Alto Networks INC | Stock-Tech | 5.37% | +5.37% | NEW | |
| 3 | RBC | RBC Bearings INC | Stock-Industrials | 5.12% | — | -18.06% | |
| 4 | IDXX | Idexx Laboratories INC | Stock-Healthcare | 5.01% | -0.41% | -8.63% | |
| 5 | AVAV | Aerovironment INC | Stock-Industrials | 4.29% | -2.62% | -32.63% | |
| 6 | KTOS | Kratos Defense & Security | Stock-Industrials | 4.06% | -1.41% | -34.42% | |
| 7 | FTNT | Fortinet INC | Stock-Tech | 3.64% | +0.40% | -10.46% | |
| 8 | SEIC | Sei Investments Company | Stock-Financials | 3.24% | +1.16% | +33.71% | |
| 9 | RMD | Resmed INC | Stock-Healthcare | 3.20% | -0.06% | -13.54% | |
| 10 | GMED | Globus Medical INC - A | Stock-Healthcare | 3.07% | +1.20% | +36.37% | |
| 11 | TECH | Bio-techne CORP | Stock-Healthcare | 2.87% | +0.43% | +8.50% | |
| 12 | CGNT | Cognyte Software Ltd. | Stock-Other | 2.83% | +0.05% | -3.16% | |
| 13 | VRNS | Varonis Systems INC | Stock-Tech | 2.68% | — | +54.30% | |
| 14 | RAMP | Liveramp Holdings INC | Stock-Other | 2.65% | +0.22% | -0.75% | |
| 15 | GWRE | Guidewire Software INC | Stock-Tech | 2.60% | -0.29% | -0.38% | |
| 16 | MANH | Manhattan Associates INC | Stock-Tech | 2.56% | -0.25% | -2.47% | |
| 17 | NOVT | Novanta INC | Stock-Other | 2.37% | +0.37% | -2.09% | |
| 18 | RGEN | Repligen CORP | Stock-Healthcare | 2.26% | -0.16% | +6.75% | |
| 19 | CVLT | Commvault Systems INC | Stock-Tech | 2.26% | -0.69% | +1.32% | |
| 20 | DT | Dynatrace INC | Stock-Tech | 2.09% | +2.09% | NEW | |
| 21 | JKHY | Jack Henry & Associates INC | Stock-Tech | 2.06% | +0.04% | -3.29% | |
| 22 | VEEV | Veeva Systems Inc-class A | Stock-Healthcare | 1.95% | -0.24% | -7.29% | |
| 23 | PRLB | Proto Labs INC | Stock-Other | 1.92% | +0.51% | -0.57% | |
| 24 | NCNO | Ncino INC | Stock-Other | 1.91% | -0.38% | +17.14% | |
| 25 | TYL | Tyler Technologies INC | Stock-Tech | 1.82% | +1.38% | +348.94% | |
| 26 | CSGP | Costar Group INC | Stock-Real Estate | 1.79% | -0.66% | -0.01% | |
| 27 | TW | Tradeweb Markets Inc-class A | Stock-Financials | 1.58% | +0.35% | -3.66% | |
| 28 | BMI | Badger Meter INC | Stock-Tech | 1.52% | +1.52% | NEW | |
| 29 | AZTA | Azenta INC | Stock-Other | 1.47% | -0.03% | +26.88% | |
| 30 | IPGP | Ipg Photonics CORP | Stock-Tech | 1.29% | +0.55% | -11.31% | |
| 31 | AAON | Aaon INC | Stock-Industrials | 1.23% | +0.32% | +1.89% | |
| 32 | MORN | Morningstar INC | Stock-Financials | 0.98% | -0.10% | -4.18% | |
| 33 | NICE | Nice LTD - Spon Adr | Stock-Tech | 0.93% | -0.52% | -45.94% | |
| 34 | NEO | Neogenomics INC | Stock-Healthcare | 0.90% | -0.31% | -3.16% | |
| 35 | STAA | Staar Surgical Co | Stock-Other | 0.88% | — | +18.73% | |
| 36 | CRNC | Cerence INC | Stock-Other | 0.85% | -0.40% | -5.12% | |
| 37 | DXCM | Dexcom INC | Stock-Healthcare | 0.85% | — | +1.09% | |
| 38 | VSEC | Vse CORP | Stock-Industrials | 0.84% | +0.78% | +1027.14% | |
| 39 | CGNX | Cognex CORP | Stock-Tech | 0.71% | — | -25.48% | |
| 40 | GNTX | Gentex CORP | Stock-Consumer Disc | 0.63% | +0.03% | -7.85% | |
| 41 | ESE | Esco Technologies INC | Stock-Tech | 0.58% | +0.58% | NEW | |
| 42 | FDS | Factset Research Systems INC | Stock-Financials | 0.50% | -1.23% | -68.13% | |
| 43 | MMSI | Merit Medical Systems INC | Stock-Healthcare | 0.43% | — | +24.38% | |
| 44 | ORLY | O'reilly Automotive INC | Stock-Consumer Disc | 0.43% | — | — | |
| 45 | SNPS | Synopsys INC | Stock-Tech | 0.41% | -0.01% | -4.81% | |
| 46 | QLYS | Qualys INC | Stock-Tech | 0.40% | -1.97% | -79.28% | |
| 47 | MPWR | Monolithic Power Systems INC | Stock-Tech | 0.37% | — | -2.59% | |
| 48 | DORM | Dorman Products INC | Stock-Consumer Disc | 0.34% | +0.23% | +196.15% | |
| 49 | KWR | Quaker Chemical Corporation | Stock-Other | 0.26% | +0.10% | +47.79% | |
| 50 | SPSC | Sps Commerce INC | Stock-Tech | 0.26% | -0.95% | -71.94% |
Performance for Q3 2026
+13.8%
Performance Last 4 Quarters
-11%
Based on 63% of reported portfolio value with available pricing
| Period | Holdings | Total value | Stability | Top holdings |
|---|---|---|---|---|
| 2026-03-31 | 75 | $1.9B | 46 | |
| 2025-12-31 | 68 | $2.3B | 22 | |
| 2025-09-30 | 68 | $2.5B | 36 | |
| 2025-06-30 | 63 | $2.4B | 0 | |
| 2025-03-31 | 63 | $2.5B | 100 | |
| 2024-12-31 | 63 | $2.7B | 0 | |
| 2024-09-30 | 61 | $3.1B | 0 | |
| 2024-06-30 | 62 | $3.0B | 0 | |
| 2024-03-31 | 64 | $3.1B | 0 | |
| 2023-12-31 | 64 | $2.9B | 0 | |
| 2023-09-30 | 63 | $2.6B | 0 | |
| 2023-06-30 | 64 | $2.9B | 0 | |
| 2023-03-31 | 62 | $2.8B | 0 | |
| 2022-12-31 | 61 | $2.6B | 0 | |
| 2022-09-30 | 63 | $2.5B | 0 | |
| 2022-06-30 | 63 | $2.7B | 0 | |
| 2022-03-31 | 65 | $3.4B | 0 | |
| 2021-12-31 | 66 | $3.9B | 0 | |
| 2021-09-30 | 67 | $3.7B | 0 | |
| 2021-06-30 | 69 | $3.6B | 96 | |
| 2021-03-31 | 70 | $3.3B | 16 | |
| 2020-12-31 | 71 | $3.3B | 22 | |
| 2020-09-30 | 71 | $2.7B | 14 | |
| 2020-06-30 | 71 | $2.7B | 30 | |
| 2020-03-31 | 69 | $2.1B | 24 | |
| 2019-12-31 | 71 | $2.4B | 16 | |
| 2019-09-30 | 69 | $2.3B | 11 | |
| 2019-06-30 | 70 | $2.3B | 14 | |
| 2019-03-31 | 69 | $2.2B | 26 | |
| 2018-12-31 | 74 | $1.9B | 30 | |
| 2018-09-30 | 72 | $2.3B | 21 | |
| 2018-06-30 | 73 | $1.9B | 15 | |
| 2018-03-31 | 74 | $1.8B | 16 | |
| 2017-12-31 | 77 | $1.7B | 19 | |
| 2017-09-30 | 78 | $1.6B | 19 | |
| 2017-06-30 | 83 | $1.6B | 17 | |
| 2017-03-31 | 81 | $1.4B | 19 | |
| 2016-12-31 | 94 | $1.3B | 19 | |
| 2016-09-30 | 94 | $1.3B | 100 | |
| 2016-06-30 | 108 | $1.2B | 100 | |
| 2016-03-31 | 104 | $1.1B | 28 | |
| 2015-12-31 | 107 | $1.1B | 35 | |
| 2015-09-30 | 67 | $964.5M | 16 | |
| 2015-06-30 | 72 | $1.1B | 10 | |
| 2015-03-31 | 71 | $1.0B | 15 | |
| 2014-12-31 | 77 | $921.4M | 27 | |
| 2014-09-30 | 78 | $859.5M | 22 | |
| 2014-06-30 | 79 | $889.8M | 13 | |
| 2014-03-31 | 78 | $848.4M | 13 | |
| 2013-12-31 | 80 | $807.0M | 17 | |
| 2013-09-30 | 84 | $744.7M | 25 | |
| 2013-06-30 | 83 | $666.0M | 0 |
American Capital Management INC's most significant position changes for 2026-03-31: Sold out: Cyberark Software LTD; New buy: Palo Alto Networks INC (PANW); New buy: Dynatrace INC (DT); New buy: Badger Meter INC (BMI); New buy: Esco Technologies INC (ESE).
| # | Ticker | Issuer | Weight Change | Shares Change | Action |
|---|---|---|---|---|---|
| 1 | TYL | Tyler Technologies INC | +1.4% | +348.94% | Add |
| 2 | GMED | Globus Medical INC - A | +1.2% | +36.37% | Add |
| 3 | SEIC | Sei Investments Company | +1.2% | +33.71% | Add |
| 4 | VSEC | Vse CORP | +0.8% | +1027.14% | Add |
| 5 | IPGP | Ipg Photonics CORP | +0.6% | -11.31% | Trim |
| 6 | PRLB | Proto Labs INC | +0.5% | -0.57% | Trim |
| 7 | TECH | Bio-techne CORP | +0.4% | +8.50% | Add |
| 8 | FTNT | Fortinet INC | +0.4% | -10.46% | Trim |
| 9 | NOVT | Novanta INC | +0.4% | -2.09% | Trim |
| 10 | TW | Tradeweb Markets Inc-class A | +0.4% | -3.66% | Trim |
| 11 | AAON | Aaon INC | +0.3% | +1.89% | Add |
| 12 | DORM | Dorman Products INC | +0.2% | +196.15% | Add |
| 13 | RAMP | Liveramp Holdings INC | +0.2% | -0.75% | Trim |
| 14 | KWR | Quaker Chemical Corporation | +0.1% | +47.79% | Add |
| 15 | MEDP | Medpace Holdings INC | +0.1% | -2.86% | Trim |
| 16 | CGNT | Cognyte Software Ltd. | +0.1% | -3.16% | Trim |
| 17 | JKHY | Jack Henry & Associates INC | 0% | -3.29% | Trim |
| 18 | GNTX | Gentex CORP | 0% | -7.85% | Trim |
| 19 | SNPS | Synopsys INC | 0% | -4.81% | Trim |
| 20 | PODD | Insulet CORP | 0% | +2.04% | Add |
| 21 | AZTA | Azenta INC | 0% | +26.88% | Add |
| 22 | RMD | Resmed INC | -0.1% | -13.54% | Trim |
| 23 | HAE | Haemonetics Corp/mass | -0.1% | -10.08% | Trim |
| 24 | MORN | Morningstar INC | -0.1% | -4.18% | Trim |
| 25 | RGEN | Repligen CORP | -0.2% | +6.75% | Add |
| 26 | ICLR | ICON Public Limited Company | -0.2% | -86.22% | Trim |
| 27 | VEEV | Veeva Systems Inc-class A | -0.2% | -7.29% | Trim |
| 28 | MANH | Manhattan Associates INC | -0.3% | -2.47% | Trim |
| 29 | GWRE | Guidewire Software INC | -0.3% | -0.38% | Trim |
| 30 | NEO | Neogenomics INC | -0.3% | -3.16% | Trim |
| 31 | NEOG | Neogen CORP | -0.4% | -90.44% | Trim |
| 32 | NCNO | Ncino INC | -0.4% | +17.14% | Add |
| 33 | CRNC | Cerence INC | -0.4% | -5.12% | Trim |
| 34 | IDXX | Idexx Laboratories INC | -0.4% | -8.63% | Trim |
| 35 | NICE | Nice LTD - Spon Adr | -0.5% | -45.94% | Trim |
| 36 | CSGP | Costar Group INC | -0.7% | -0.01% | Trim |
| 37 | CVLT | Commvault Systems INC | -0.7% | +1.32% | Add |
| 38 | SPSC | Sps Commerce INC | -1% | -71.94% | Trim |
| 39 | FDS | Factset Research Systems INC | -1.2% | -68.13% | Trim |
| 40 | KTOS | Kratos Defense & Security | -1.4% | -34.42% | Trim |
| 41 | QLYS | Qualys INC | -2% | -79.28% | Trim |
| 42 | AVAV | Aerovironment INC | -2.6% | -32.63% | Trim |
| 43 | ✓ | Cyberark Software LTD | — | EXIT | Sold out |
| 44 | PANW | Palo Alto Networks INC | — | NEW | New buy |
| 45 | DT | Dynatrace INC | — | NEW | New buy |
| 46 | BMI | Badger Meter INC | — | NEW | New buy |
| 47 | ESE | Esco Technologies INC | — | NEW | New buy |
| 48 | SMMD | Ishares Russell 2500 ETF | — | EXIT | Sold out |
| 49 | BCPC | Balchem CORP | — | NEW | New buy |
| 50 | SHY | Ishares 1-3 Year Treasury Bo | — | NEW | New buy |
| Period | Filed | Type | EDGAR |
|---|---|---|---|
| 2026-03-31 | 2026-05-15 | 13F-HR | View on EDGAR |
| 2025-12-31 | 2026-02-17 | 13F-HR | View on EDGAR |
| 2025-09-30 | 2025-11-14 | 13F-HR | View on EDGAR |
| 2025-06-30 | 2025-08-14 | 13F-HR | View on EDGAR |
| 2025-03-31 | 2025-05-15 | 13F-HR | View on EDGAR |
| 2024-12-31 | 2025-02-11 | 13F-HR | View on EDGAR |
| 2024-09-30 | 2024-11-14 | 13F-HR | View on EDGAR |
| 2024-06-30 | 2024-08-14 | 13F-HR | View on EDGAR |
| 2024-03-31 | 2024-05-15 | 13F-HR | View on EDGAR |
| 2023-12-31 | 2024-02-14 | 13F-HR | View on EDGAR |
| 2023-09-30 | 2023-11-14 | 13F-HR | View on EDGAR |
| 2023-06-30 | 2023-08-14 | 13F-HR | View on EDGAR |
| 2023-03-31 | 2023-05-03 | 13F-HR | View on EDGAR |
| 2022-12-31 | 2023-02-14 | 13F-HR | View on EDGAR |
| 2022-09-30 | 2022-11-14 | 13F-HR | View on EDGAR |
| 2022-06-30 | 2022-08-15 | 13F-HR | View on EDGAR |
| 2022-03-31 | 2022-05-16 | 13F-HR | View on EDGAR |
| 2021-12-31 | 2022-02-14 | 13F-HR | View on EDGAR |
| 2021-09-30 | 2021-11-15 | 13F-HR | View on EDGAR |
| 2021-06-30 | 2021-08-13 | 13F-HR | View on EDGAR |
| 2021-03-31 | 2021-05-17 | 13F-HR | View on EDGAR |
| 2020-12-31 | 2021-02-16 | 13F-HR | View on EDGAR |
| 2020-09-30 | 2020-11-16 | 13F-HR | View on EDGAR |
| 2020-06-30 | 2020-08-13 | 13F-HR | View on EDGAR |
| 2020-03-31 | 2020-05-15 | 13F-HR | View on EDGAR |
| 2019-12-31 | 2020-02-12 | 13F-HR | View on EDGAR |
| 2019-09-30 | 2019-11-14 | 13F-HR | View on EDGAR |
| 2019-06-30 | 2019-11-14 | Amendment | View on EDGAR |
| 2019-06-30 | 2019-08-12 | 13F-HR | View on EDGAR |
| 2019-03-31 | 2019-05-14 | 13F-HR | View on EDGAR |
| 2018-12-31 | 2019-02-08 | 13F-HR | View on EDGAR |
| 2018-09-30 | 2018-11-02 | 13F-HR | View on EDGAR |
| 2018-06-30 | 2018-07-17 | 13F-HR | View on EDGAR |
| 2018-03-31 | 2018-04-23 | 13F-HR | View on EDGAR |
| 2017-12-31 | 2018-04-05 | Amendment | View on EDGAR |
| 2017-12-31 | 2018-01-23 | 13F-HR | View on EDGAR |
| 2017-09-30 | 2018-04-05 | Amendment | View on EDGAR |
| 2017-09-30 | 2017-10-20 | 13F-HR | View on EDGAR |
| 2017-06-30 | 2018-04-19 | Amendment | View on EDGAR |
| 2017-06-30 | 2017-07-27 | 13F-HR | View on EDGAR |
| 2017-03-31 | 2018-04-18 | Amendment | View on EDGAR |
| 2017-03-31 | 2017-04-24 | 13F-HR | View on EDGAR |
| 2016-12-31 | 2017-02-16 | Amendment | View on EDGAR |
| 2016-12-31 | 2017-02-09 | 13F-HR | View on EDGAR |
| 2016-09-30 | 2016-10-26 | 13F-HR | View on EDGAR |
| 2016-06-30 | 2016-08-03 | 13F-HR | View on EDGAR |
| 2016-03-31 | 2016-04-25 | 13F-HR | View on EDGAR |
| 2015-12-31 | 2016-02-10 | 13F-HR | View on EDGAR |
| 2015-09-30 | 2015-11-03 | 13F-HR | View on EDGAR |
| 2015-06-30 | 2015-07-21 | 13F-HR | View on EDGAR |
| 2015-03-31 | 2015-04-21 | Amendment | View on EDGAR |
| 2015-03-31 | 2015-04-16 | 13F-HR | View on EDGAR |
| 2015-03-31 | 2015-04-16 | Amendment | View on EDGAR |
| 2014-12-31 | 2015-02-06 | 13F-HR | View on EDGAR |
| 2014-09-30 | 2014-10-14 | 13F-HR | View on EDGAR |
| 2014-06-30 | 2014-07-16 | 13F-HR | View on EDGAR |
| 2014-03-31 | 2014-04-14 | 13F-HR | View on EDGAR |
| 2013-12-31 | 2014-01-23 | 13F-HR | View on EDGAR |
| 2013-09-30 | 2013-10-08 | 13F-HR | View on EDGAR |
| 2013-06-30 | 2013-07-18 | 13F-HR | View on EDGAR |
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