AMERICAN CAPITAL MANAGEMENT INC — 13F Holdings & Portfolio
CIK 1320168 · latest 13F-HR filed 2026-08-14
AMERICAN CAPITAL MANAGEMENT INC manages $2.23B in 13F-reported U.S. long-equity assets across 80 reported positions as of its 2026-06-30 13F-HR filing. Its largest disclosed positions are PANW (8.76%), FTNT (5.03%), MEDP (4.99%). Quarter over quarter (versus its 2026-03-31 filing) the fund opened 7 new positions and exited 2; 43 existing positions rose in reported value and 18 fell.
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.
Long-equity book
Distinct positions
Filed 2026-08-14
vs 2026-03-31
Portfolio charts
Latest quarter's book, what changed, and how the portfolio has evolved across filings.
| Name | Title / Status | Ownership | Type |
|---|
Quarter-over-quarter changes
Changes in reported position value vs the prior 13F, so price moves count too, not just shares bought or sold.
Top Adds (vs prior quarter)
- PALO ALTO NETWORKS INC$95.3M +95.3%
- NCINO INC$47.9M +134.7%
- FORTINET INC$44.4M +65.5%
- VARONIS SYSTEMS INC$44.1M +88.2%
- DORMAN PRODUCTS INC$32.5M +515.0%
Top Trims
- LIVE RAMP HOLDINGS INC-$40.2M -81.3%
- JACK HENRY & ASSOCIATES INC-$24.7M -64.2%
- KRATOS DEFENSE & SECURITY SOLUTIONS INC-$24.2M -32.1%
- RESMED INC-$15.1M -25.3%
- COSTAR GROUP INC-$12.8M -38.3%
New Positions
- MERCURY SYSTEMS INC$59.5M
- ISHARES TRUST$1.1M
- ISHARES TRUST$949.1K
- ISHARES TRUST$773.7K
- ISHARES TRUST$573.6K
AMERICAN CAPITAL MANAGEMENT INC Holdings (2026-06-30)
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 | PALO ALTO NETWORKS INC | PANW | 697435105 | $195.4M | 8.76% | 572,934 | SH |
| 2 | FORTINET INC | FTNT | 34959E109 | $112.1M | 5.03% | 729,885 | SH |
| 3 | MEDPACE HOLDINGS INC | MEDP | 58506Q109 | $111.3M | 4.99% | 210,217 | SH |
| 4 | VARONIS SYSTEMS INC | VRNS | 922280102 | $94.1M | 4.22% | 2,241,704 | SH |
| 5 | RBC BEARINGS INC | RBC | 75524B104 | $92.6M | 4.15% | 143,737 | SH |
| 6 | IDEXX LABORATORIES INC | IDXX | 45168D104 | $85.3M | 3.83% | 162,110 | SH |
| 7 | NCINO INC | NCNO | 63947X101 | $83.5M | 3.74% | 5,107,539 | SH |
| 8 | AEROVIRONMENT INC | AVAV | 008073108 | $69.7M | 3.13% | 422,518 | SH |
| 9 | BIO-TECHNE CORP | TECH | 09073M104 | $68.8M | 3.08% | 973,789 | SH |
| 10 | SEI INVESTMENTS COMPANY | SEIC | 784117103 | $65.4M | 2.93% | 745,323 | SH |
| 11 | COMMVAULT SYSTEMS INC | CVLT | 204166102 | $62.5M | 2.80% | 440,931 | SH |
| 12 | MERCURY SYSTEMS INC | MRCY | 589378108 | $59.5M | 2.67% | 486,064 | SH |
| 13 | NOVANTA INC | NOVT | 67000B104 | $58.8M | 2.64% | 362,271 | SH |
| 14 | DYNATRACE INC | DT | 268150109 | $58.5M | 2.62% | 1,332,429 | SH |
| 15 | COGNYTE SOFTWARE LTD | CGNT | M25133105 | $54.3M | 2.43% | 6,183,567 | SH |
| 16 | GLOBUS MEDICAL INC | GMED | 379577208 | $51.6M | 2.31% | 653,072 | SH |
| 17 | KRATOS DEFENSE & SECURITY SOLUTIONS INC | KTOS | 50077B207 | $51.3M | 2.30% | 1,029,653 | SH |
| 18 | MANHATTAN ASSOCIATES INC | MANH | 562750109 | $50.8M | 2.28% | 364,696 | SH |
| 19 | PROTO LABS INC | PRLB | 743713109 | $50.5M | 2.27% | 619,845 | SH |
| 20 | REPLIGEN CORP | RGEN | 759916109 | $49.3M | 2.21% | 361,055 | SH |
| 21 | AAON INC | AAON | 000360206 | $47.6M | 2.13% | 375,178 | SH |
| 22 | RESMED INC | RMD | 761152107 | $44.5M | 2.00% | 228,458 | SH |
| 23 | GUIDEWIRE SOFTWARE INC | GWRE | 40171V100 | $40.5M | 1.82% | 328,983 | SH |
| 24 | DORMAN PRODUCTS INC | DORM | 258278100 | $38.8M | 1.74% | 284,244 | SH |
| 25 | BADGER METER INC | BMI | 056525108 | $38.3M | 1.72% | 258,243 | SH |
| 26 | VEEVA SYSTEMS INC | VEEV | 922475108 | $34.9M | 1.57% | 196,848 | SH |
| 27 | NEOGENOMICS INC | NEO | 64049M209 | $32.6M | 1.46% | 2,237,707 | SH |
| 28 | TYLER TECHNOLOGIES INC | TYL | 902252105 | $29.6M | 1.33% | 101,210 | SH |
| 29 | VSE CORP | VSEC | 918284100 | $29.5M | 1.32% | 128,934 | SH |
| 30 | CERENCE INC | CRNC | 156727109 | $27.3M | 1.22% | 2,407,398 | SH |
| 31 | AZENTA INC | AZTA | 114340102 | $27.1M | 1.21% | 1,061,490 | SH |
| 32 | STAAR SURGICAL COMPANY | STAA | 852312305 | $24.3M | 1.09% | 846,659 | SH |
| 33 | TRADEWEB MARKETS INC | TW | 892672106 | $23.7M | 1.06% | 238,244 | SH |
| 34 | IPG PHOTONICS CORP | IPGP | 44980X109 | $23.2M | 1.04% | 197,882 | SH |
| 35 | ESCO TECHNOLOGIES INC | ESE | 296315104 | $22.9M | 1.03% | 65,312 | SH |
| 36 | COSTAR GROUP INC | CSGP | 22160N109 | $20.5M | 0.92% | 725,143 | SH |
| 37 | COGNEX CORP | CGNX | 192422103 | $18.2M | 0.82% | 251,103 | SH |
| 38 | MORNINGSTAR INC | MORN | 617700109 | $17.9M | 0.80% | 114,947 | SH |
| 39 | DEXCOM INC | DXCM | 252131107 | $15.8M | 0.71% | 235,152 | SH |
| 40 | JACK HENRY & ASSOCIATES INC | JKHY | 426281101 | $13.8M | 0.62% | 99,930 | SH |
| 41 | GENTEX CORP | GNTX | 371901109 | $13.4M | 0.60% | 531,229 | SH |
| 42 | NICE LTD | NICE | 653656108 | $12.4M | 0.56% | 136,644 | SH |
| 43 | FACTSET RESEARCH SYSTEMS INC | FDS | 303075105 | $9.4M | 0.42% | 40,986 | SH |
| 44 | LIVE RAMP HOLDINGS INC | RAMP | 53815P108 | $9.3M | 0.42% | 246,042 | SH |
| 45 | SYNOPSYS INC | SNPS | 871607107 | $8.6M | 0.38% | 19,196 | SH |
| 46 | MONOLITHIC POWER SYSTEMS INC | MPWR | 609839105 | $8.2M | 0.37% | 5,897 | SH |
| 47 | O'REILLY AUTOMOTIVE INC | ORLY | 67103H107 | $7.9M | 0.36% | 86,235 | SH |
| 48 | MERIT MEDICAL SYSTEMS INC | MMSI | 589889104 | $7.3M | 0.33% | 104,967 | SH |
| 49 | GRAHAM CORP | GHM | 384556106 | $6.4M | 0.29% | 52,050 | SH |
| 50 | HAEMONETICS CORP | HAE | 405024100 | $5.0M | 0.23% | 66,915 | SH |
| Period | Filed | AUM | Holdings | Accession |
|---|---|---|---|---|
| 2026-06-30 | 2026-08-14 | $2.23B | 80 | 0001104659-26-097334 |
| 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 |
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