Institutional Manager · CIK 0001320168
AMERICAN CAPITAL MANAGEMENT INC
New York, NY · File #028-11313
Latest AUM
$2.27B
Positions
68
Top-10 Concentration
47.2%
Filings
9
Portfolio Value Over Time
2024-03
2024-06
2024-09
2024-12
2025-03
2025-06
2025-09
2025-12
Biggest QoQ Changes
Ranked by conviction flow (share change × current price) so mark-to-market moves don't dominate. Price effect column shows how much of the $ change was just the stock moving.
| Action | Issuer | Ticker / CUSIP | Δ Shares | Flow ($) | Price Effect |
|---|---|---|---|---|---|
| REDUCE | KRATOS DEFENSE & SECURITY SOLUTIONS INC | 50077B207 | -375,508 | -$28.5M | -$31.1M |
| EXITED | PAYCOM SOFTWARE INC | 70432V102 | -103,802 | -$21.6M | $0 |
| ADD | NOVANTA INC | NOVTU | +163,005 | +$19.4M | +$4.1M |
| ADD | PROTO LABS INC | PRLB | +352,015 | +$17.8M | +$156,405 |
| REDUCE | AEROVIRONMENT INC | AVAV | -73,400 | -$17.8M | -$52.6M |
| EXITED | TREX COMPANY INC | 89531P105 | -280,737 | -$14.5M | $0 |
| REDUCE | MEDPACE HOLDINGS INC | MEDP | -24,383 | -$13.7M | +$11.8M |
| REDUCE | KORNIT DIGITAL LTD | KRNT | -747,390 | -$10.7M | +$908,177 |
| ADD | IPG PHOTONICS CORP | IPGP | +121,426 | +$8.7M | -$866,231 |
| REDUCE | DEXCOM INC | DXCM | -109,016 | -$7.2M | -$329,167 |
Sector Allocation
Filing History
- 13F HOLDINGS REPORTQ/E Dec 202568 pos · $2.27B
- 13F HOLDINGS REPORTQ/E Sep 202568 pos · $2.51B
- 13F HOLDINGS REPORTQ/E Jun 202563 pos · $2.41B
- 13F HOLDINGS REPORTQ/E Mar 202563 pos · $2.46B
- 13F HOLDINGS REPORTQ/E Dec 202463 pos · $2.69B
- 13F HOLDINGS REPORTQ/E Sep 202461 pos · $3.06B
- 13F HOLDINGS REPORTQ/E Jun 202462 pos · $2.99B
- 13F HOLDINGS REPORTQ/E Mar 202464 pos · $3.12B
- 13F HOLDINGS REPORTQ/E Dec 202363 pos · $2.59B
Top 20 Holdings — Dec 2025
| # | Issuer | Ticker | Shares | Value | % of Portfolio |
|---|---|---|---|---|---|
| 1 | AEROVIRONMENT INC | AVAV | 647,710 | $156.7M | 7.00% |
| 2 | CYBERARK SOFTWARE LTD | M2682V108 | 342,015 | $152.6M | 6.81% |
| 3 | MEDPACE HOLDINGS INC | MEDP | 224,374 | $126.0M | 5.63% |
| 4 | KRATOS DEFENSE & SECURITY SOLUTIONS INC | 50077B207 | 1,634,493 | $124.1M | 5.54% |
| 5 | IDEXX LABORATORIES INC | 45168D104 | 181,745 | $123.0M | 5.49% |
| 6 | RBC BEARINGS INC | RBC | 214,117 | $96.0M | 4.29% |
| 7 | RESMED INC | RSMDF | 306,956 | $73.9M | 3.30% |
| 8 | FORTINET INC | FTNT | 925,753 | $73.5M | 3.28% |
| 9 | COMMVAULT SYSTEMS INC | CVLT | 533,806 | $66.9M | 2.99% |
| 10 | GUIDEWIRE SOFTWARE INC | GWRE | 325,432 | $65.4M | 2.92% |
| 11 | MANHATTAN ASSOCIATES INC | MANH | 366,860 | $63.6M | 2.84% |
| 12 | COGNYTE SOFTWARE LTD | CGNT | 6,708,394 | $63.1M | 2.82% |
| 13 | COSTAR GROUP INC | CSGP | 825,340 | $55.5M | 2.48% |
| 14 | BIO-TECHNE CORP | TECH | 941,149 | $55.3M | 2.47% |
| 15 | LIVE RAMP HOLDINGS INC | RAMP | 1,877,756 | $55.1M | 2.46% |
| 16 | REPLIGEN CORP | RGEN | 335,115 | $54.9M | 2.45% |
| 17 | QUALYS INC | QLYS | 404,119 | $53.7M | 2.40% |
| 18 | NCINO INC | NCNO | 2,027,809 | $52.0M | 2.32% |
| 19 | VEEVA SYSTEMS INC | VEEV | 222,425 | $49.7M | 2.22% |
| 20 | VARONIS SYSTEMS INC | VRNS | 1,509,039 | $49.5M | 2.21% |