AMERICAN CAPITAL MANAGEMENT INC — 13F Holdings & Portfolio
CIK 1320168 · latest 13F-HR filed 2026-05-15
AMERICAN CAPITAL MANAGEMENT INC manages $1.86B in 13F-reported U.S. long-equity assets across 75 reported positions as of its 2026-03-31 13F-HR filing. Its largest disclosed positions are MEDP (5.62%), PANW (5.37%), RBC (5.12%). Quarter over quarter (versus its 2025-12-31 filing) the fund opened 9 new positions, exited 2, added to 13, and trimmed 40.
AUM is the long-equity portion reported on Form 13F-HR. Excludes short positions, cash, foreign holdings, and non-13F assets. For informational purposes only — not investment advice.
$1.86B
Long-equity book
75
Distinct positions
2026-03-31
Filed 2026-05-15
+9 / −2 / ↑13 / ↓40
vs 2025-12-31
| Name | Title / Status | Ownership | Type |
|---|
Top Adds (vs prior quarter)
- TYLER TECHNOLOGIES INC$23.9M +238.6%
- GLOBUS MEDICAL INC$14.7M +34.6%
- VSE CORP$14.3M +1103.0%
- SEI INVESTMENTS CO$13.2M +27.9%
- IPG PHOTONICS CORP$7.1M +41.9%
Top Trims
- AEROVIRONMENT INC-$76.8M -49.0%
- KRATOS DEFENSE & SECURITY SOLUTIONS INC-$48.5M -39.1%
- QUALYS INC-$46.3M -86.3%
- FACTSET RESEARCH SYSTEMS INC-$29.8M -76.2%
- IDEXX LABORATORIES INC-$29.7M -24.1%
New Positions
- PALO ALTO NETWORKS INC$100.1M
- DYNATRACE INC$39.0M
- BADGER METER INC$28.3M
- ESCO TECHNOLOGIES INC$10.8M
- BALCHEM CORP$3.4M
Rows tagged Call or Put are options positions, not stock. Per SEC Form 13F-HR, Value shows the notional value of the underlying (shares covered × underlying price), not the option premium. Shares is the number of underlying shares covered (divide by 100 for contract count).
| # | Issuer | Symbol | CUSIP | Value | Weight | Shares | Type |
|---|---|---|---|---|---|---|---|
| 1 | MEDPACE HOLDINGS INC | MEDP | 58506Q109 | $104.7M | 5.62% | 217,947 | SH |
| 2 | PALO ALTO NETWORKS INC | PANW | 697435105 | $100.1M | 5.37% | 624,084 | SH |
| 3 | RBC BEARINGS INC | RBC | 75524B104 | $95.3M | 5.12% | 175,443 | SH |
| 4 | IDEXX LABORATORIES INC | IDXX | 45168D104 | $93.3M | 5.01% | 166,056 | SH |
| 5 | AEROVIRONMENT INC | AVAV | 008073108 | $79.9M | 4.29% | 436,367 | SH |
| 6 | KRATOS DEFENSE & SECURITY SOLUTIONS INC | KTOS | 50077B207 | $75.6M | 4.06% | 1,071,908 | SH |
| 7 | FORTINET INC | FTNT | 34959E109 | $67.7M | 3.64% | 828,923 | SH |
| 8 | SEI INVESTMENTS CO | SEIC | 784117103 | $60.3M | 3.24% | 768,615 | SH |
| 9 | RESMED INC | RMD | 761152107 | $59.6M | 3.20% | 265,399 | SH |
| 10 | GLOBUS MEDICAL INC | GMED | 379577208 | $57.1M | 3.07% | 663,049 | SH |
| 11 | BIO-TECHNE CORP | TECH | 09073M104 | $53.4M | 2.87% | 1,021,128 | SH |
| 12 | COGNYTE SOFTWARE LTD | CGNT | M25133105 | $52.6M | 2.83% | 6,496,210 | SH |
| 13 | VARONIS SYSTEMS INC | VRNS | 922280102 | $50.0M | 2.68% | 2,328,379 | SH |
| 14 | LIVE RAMP HOLDINGS INC | RAMP | 53815P108 | $49.4M | 2.65% | 1,863,589 | SH |
| 15 | GUIDEWIRE SOFTWARE INC | GWRE | 40171V100 | $48.5M | 2.60% | 324,196 | SH |
| 16 | MANHATTAN ASSOCIATES INC | MANH | 562750109 | $47.6M | 2.56% | 357,807 | SH |
| 17 | NOVANTA INC | NOVT | 67000B104 | $44.2M | 2.37% | 373,874 | SH |
| 18 | REPLIGEN CORP | RGEN | 759916109 | $42.1M | 2.26% | 357,720 | SH |
| 19 | COMMVAULT SYSTEMS INC | CVLT | 204166102 | $42.1M | 2.26% | 540,845 | SH |
| 20 | DYNATRACE INC | DT | 268150109 | $39.0M | 2.09% | 1,054,267 | SH |
| 21 | JACK HENRY & ASSOCIATES INC | JKHY | 426281101 | $38.4M | 2.06% | 243,075 | SH |
| 22 | VEEVA SYSTEMS INC | VEEV | 922475108 | $36.2M | 1.95% | 206,218 | SH |
| 23 | PROTO LABS INC | PRLB | 743713109 | $35.8M | 1.92% | 627,705 | SH |
| 24 | NCINO INC | NCNO | 63947X101 | $35.6M | 1.91% | 2,375,396 | SH |
| 25 | TYLER TECHNOLOGIES INC | TYL | 902252105 | $33.9M | 1.82% | 98,942 | SH |
| 26 | COSTAR GROUP INC | CSGP | 22160N109 | $33.3M | 1.79% | 825,296 | SH |
| 27 | TRADEWEB MARKETS INC | TW | 892672106 | $29.3M | 1.58% | 249,247 | SH |
| 28 | BADGER METER INC | BMI | 056525108 | $28.3M | 1.52% | 185,841 | SH |
| 29 | AZENTA INC | AZTA | 114340102 | $27.4M | 1.47% | 1,296,024 | SH |
| 30 | IPG PHOTONICS CORP | IPGP | 44980X109 | $23.9M | 1.29% | 208,918 | SH |
| 31 | AAON INC | AAON | 000360206 | $22.9M | 1.23% | 276,884 | SH |
| 32 | MORNINGSTAR INC | MORN | 617700109 | $18.3M | 0.98% | 108,340 | SH |
| 33 | NICE LTD | NICE | 653656108 | $17.4M | 0.93% | 157,593 | SH |
| 34 | NEOGENOMICS INC | NEO | 64049M209 | $16.7M | 0.90% | 2,250,878 | SH |
| 35 | STAAR SURGICAL CO | STAA | 852312305 | $16.4M | 0.88% | 878,035 | SH |
| 36 | CERENCE INC | CRNC | 156727109 | $15.9M | 0.85% | 2,519,289 | SH |
| 37 | DEXCOM INC | DXCM | 252131107 | $15.8M | 0.85% | 251,475 | SH |
| 38 | VSE CORP | VSEC | 918284100 | $15.6M | 0.84% | 84,795 | SH |
| 39 | COGNEX CORP | CGNX | 192422103 | $13.3M | 0.71% | 271,533 | SH |
| 40 | GENTEX CORP | GNTX | 371901109 | $11.7M | 0.63% | 534,356 | SH |
| 41 | ESCO TECHNOLOGIES INC | ESE | 296315104 | $10.8M | 0.58% | 38,414 | SH |
| 42 | FACTSET RESEARCH SYSTEMS INC | FDS | 303075105 | $9.3M | 0.50% | 43,008 | SH |
| 43 | MERIT MEDICAL SYSTEMS INC | MMSI | 589889104 | $8.0M | 0.43% | 115,775 | SH |
| 44 | O'REILLY AUTOMOTIVE INC | ORLY | 67103H107 | $8.0M | 0.43% | 86,235 | SH |
| 45 | SYNOPSYS INC | SNPS | 871607107 | $7.7M | 0.41% | 19,453 | SH |
| 46 | QUALYS INC | QLYS | 74758T303 | $7.4M | 0.40% | 83,752 | SH |
| 47 | MONOLITHIC POWER SYSTEMS INC | MPWR | 609839105 | $6.9M | 0.37% | 6,320 | SH |
| 48 | DORMAN PRODUCTS INC | DORM | 258278100 | $6.3M | 0.34% | 60,435 | SH |
| 49 | QUAKER CHEMICAL CORP | KWR | 747316107 | $4.8M | 0.26% | 38,642 | SH |
| 50 | SPS COMMERCE INC | SPSC | 78463M107 | $4.8M | 0.26% | 86,076 | SH |
| Period | Filed | AUM | Holdings | Accession |
|---|---|---|---|---|
| 2026-03-31 | 2026-05-15 | $1.86B | 75 | 0001104659-26-062771 |
| 2025-12-31 | 2026-02-17 | $2.27B | 68 | 0001104659-26-016553 |
| 2025-09-30 | 2025-11-14 | $2.51B | 68 | 0001104659-25-112700 |