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Super Investors AMERICAN CAPITAL MANAGEMENT INC
AC

AMERICAN CAPITAL MANAGEMENT INC

Quarterly 13F snapshot: US-listed longs only, no performance figures — 13F data cannot support them.

Portfolio value
$2.23B
Positions
80
Quarter ended
June 30, 2026
Filed
August 14, 2026

Reported portfolio value by quarter (53 quarters reported)

$3.89B $666M
Q2 13 Q1 16 Q4 18 Q3 21 Q2 24 Q2 26

$666M in Q2 2013 → $2.23B now. Hover for any quarter.

Holdings

As reported for the quarter ended June 30, 2026. Activity is the change in share count since the prior quarter's filing.

Holding % of portfolio Activity Shares Value
Palo Alto Networks Inc 8.8% Trimmed 8.2% 572,934 $195M
Fortinet Inc 5.0% Trimmed 12% 729,885 $112M
Medpace Holdings Inc 5.0% Trimmed 3.5% 210,217 $111M
Varonis Systems Inc 4.2% Trimmed 3.7% 2,241,704 $94.1M
Rbc Bearings Inc 4.2% Trimmed 18% 143,737 $92.6M
Idexx Laboratories Inc 3.8% Trimmed 2.4% 162,110 $85.3M
Ncino Inc 3.7% Added 115% 5,107,539 $83.5M
Aerovironment Inc 3.1% Trimmed 3.2% 422,518 $69.7M
Bio-techne Corp 3.1% Trimmed 4.6% 973,789 $68.8M
Sei Investments Company 2.9% Trimmed 3.0% 745,323 $65.4M
Commvault Systems Inc 2.8% Trimmed 18% 440,931 $62.5M
Mercury Systems Inc 2.7% New 486,064 $59.5M
Novanta Inc 2.6% Trimmed 3.1% 362,271 $58.8M
Dynatrace Inc 2.6% Added 26% 1,332,429 $58.5M
Cognyte Software Ltd 2.4% Trimmed 4.8% 6,183,567 $54.3M
Globus Medical Inc 2.3% Trimmed 1.5% 653,072 $51.6M
Kratos Defense & Security Solutions Inc 2.3% Trimmed 3.9% 1,029,653 $51.3M
Manhattan Associates Inc 2.3% Added 1.9% 364,696 $50.8M
Proto Labs Inc 2.3% Trimmed 1.3% 619,845 $50.5M
Repligen Corp 2.2% Added 0.9% 361,055 $49.3M
Aaon Inc 2.1% Added 36% 375,178 $47.6M
Resmed Inc 2.0% Trimmed 14% 228,458 $44.5M
Guidewire Software Inc 1.8% Added 1.5% 328,983 $40.5M
Dorman Products Inc 1.7% Added 370% 284,244 $38.8M
Badger Meter Inc 1.7% Added 39% 258,243 $38.3M
Veeva Systems Inc 1.6% Trimmed 4.5% 196,848 $34.9M
Neogenomics Inc 1.5% Trimmed 0.6% 2,237,707 $32.6M
Tyler Technologies Inc 1.3% Added 2.3% 101,210 $29.6M
Vse Corp 1.3% Added 52% 128,934 $29.5M
Cerence Inc 1.2% Trimmed 4.4% 2,407,398 $27.3M
Azenta Inc 1.2% Trimmed 18% 1,061,490 $27.1M
Staar Surgical Company 1.1% Trimmed 3.6% 846,659 $24.3M
Tradeweb Markets Inc 1.1% Trimmed 4.4% 238,244 $23.7M
Ipg Photonics Corp 1.0% Trimmed 5.3% 197,882 $23.2M
Esco Technologies Inc 1.0% Added 70% 65,312 $22.9M
Costar Group Inc 0.9% Trimmed 12% 725,143 $20.5M
Cognex Corp 0.8% Trimmed 7.5% 251,103 $18.2M
Morningstar Inc 0.8% Added 6.1% 114,947 $17.9M
Dexcom Inc 0.7% Trimmed 6.5% 235,152 $15.8M
Jack Henry & Associates Inc 0.6% Trimmed 59% 99,930 $13.8M
Gentex Corp 0.6% Trimmed 0.6% 531,229 $13.4M
Nice Ltd 0.6% Trimmed 13% 136,644 $12.4M
Factset Research Systems Inc 0.4% Trimmed 4.7% 40,986 $9.43M
LR Live Ramp Holdings Inc 0.4% Trimmed 87% 246,042 $9.26M
Synopsys Inc 0.4% Trimmed 1.3% 19,196 $8.56M
Monolithic Power Systems Inc 0.4% Trimmed 6.7% 5,897 $8.15M
O'reilly Automotive Inc 0.4% Unchanged 86,235 $7.94M
Merit Medical Systems Inc 0.3% Trimmed 9.3% 104,967 $7.28M
Graham Corp 0.3% Added 1.0% 52,050 $6.44M
Haemonetics Corp 0.2% Unchanged 66,915 $5.02M
Kornit Digital Ltd 0.2% Unchanged 282,976 $4.6M
Insulet Corp 0.2% Added 53% 29,455 $4.48M
Quaker Chemical Corp 0.2% Trimmed 29% 27,279 $4.33M
Sps Commerce Inc 0.2% Trimmed 14% 73,958 $4.23M
Alarm.com Holdings Inc 0.1% Trimmed 1.8% 68,544 $3.2M
Balchem Corp 0.1% Trimmed 20% 16,067 $2.71M
Franklin Electric Co Inc 0.1% Unchanged 22,000 $2.36M
IT Ishares Trust 0.1% Trimmed 3.6% 25,524 $2.1M
SS SPDR S&P 500 ETF Trust 0.1% Unchanged 2,425 $1.81M
Macom Technology Solutions Holdings Inc 0.1% Trimmed 7.7% 3,626 $1.38M

Showing top 60 of 80 positions.

Timeline of changes

What changed each quarter, from the filings' own share counts. Largest moves first; most recent 8 quarters.

Q2 2026

quarter ended June 30, 2026 · filed August 14, 2026

Company Action Shares changed Value of change % of portfolio
LR Live Ramp Holdings Inc Trimmed −1,617,547 −$60.9M 0.4%
Mercury Systems Inc New +486,064 +$59.5M 2.7%
Ncino Inc Added +2,732,143 +$44.7M 3.7%
Dorman Products Inc Added +223,809 +$30.5M 1.7%
Rbc Bearings Inc Trimmed −31,706 −$20.4M 4.2%
Jack Henry & Associates Inc Trimmed −143,145 −$19.7M 0.6%
Palo Alto Networks Inc Trimmed −51,150 −$17.4M 8.8%
Fortinet Inc Trimmed −99,038 −$15.2M 5.0%
Commvault Systems Inc Trimmed −99,914 −$14.2M 2.8%
Aaon Inc Added +98,294 +$12.5M 2.1%

Showing the 10 largest of 70 changes.

Q1 2026

quarter ended March 31, 2026 · filed May 15, 2026

Company Action Shares changed Value of change % of portfolio
Cyberark Software Ltd Exited −342,015 −$153M —
Palo Alto Networks Inc New +624,084 +$100M 5.4%
Kratos Defense & Security Solutions Inc Trimmed −562,585 −$39.7M 4.1%
Dynatrace Inc New +1,054,267 +$39M 2.1%
Aerovironment Inc Trimmed −211,343 −$38.7M 4.3%
Badger Meter Inc New +185,841 +$28.3M 1.5%
Qualys Inc Trimmed −320,367 −$28.1M 0.4%
Tyler Technologies Inc Added +76,903 +$26.3M 1.8%
Rbc Bearings Inc Trimmed −38,674 −$21M 5.1%
Factset Research Systems Inc Trimmed −91,943 −$20M 0.5%

Showing the 10 largest of 66 changes.

Q4 2025

quarter ended December 31, 2025 · filed February 17, 2026

Company Action Shares changed Value of change % of portfolio
Kratos Defense & Security Solutions Inc Trimmed −375,508 −$28.5M 5.5%
Paycom Software Inc Exited −103,802 −$21.6M —
Novanta Inc Added +163,005 +$19.4M 2.0%
Proto Labs Inc Added +352,015 +$17.8M 1.4%
Aerovironment Inc Trimmed −73,400 −$17.8M 6.9%
Trex Company Inc Exited −280,737 −$14.5M —
Medpace Holdings Inc Trimmed −24,383 −$13.7M 5.6%
Kornit Digital Ltd Trimmed −747,390 −$10.7M 0.2%
Ipg Photonics Corp Added +121,426 +$8.69M 0.7%
Dexcom Inc Trimmed −109,016 −$7.24M 0.7%

Showing the 10 largest of 60 changes.

Q3 2025

quarter ended September 30, 2025 · filed November 14, 2025

Company Action Shares changed Value of change % of portfolio
Ansys Exited −99,857 −$35.1M —
Cyberark Software Ltd Trimmed −67,723 −$32.7M 6.7%
Kratos Defense & Security Solutions Inc Trimmed −284,357 −$26M 7.3%
Aaon Inc New +244,446 +$22.8M 0.9%
Novanta Inc New +218,861 +$21.9M 0.9%
Aerovironment Inc Trimmed −36,323 −$11.4M 9.0%
Proto Labs Inc Added +225,269 +$11.3M 0.6%
Varonis Systems Inc Added +191,929 +$11M 3.1%
Synopsys Inc New +21,191 +$10.5M 0.4%
Neogenomics Inc Added +1,283,390 +$9.91M 0.7%

Showing the 10 largest of 63 changes.

Q2 2025

quarter ended June 30, 2025 · filed August 14, 2025

Company Action Shares changed Value of change % of portfolio
Aerovironment Trimmed −190,516 −$54.3M 9.0%
Cyberark Software Trimmed −81,068 −$33M 7.0%
Fortinet Trimmed −275,249 −$29.1M 4.4%
Gentex Trimmed −1,290,114 −$28.4M 0.7%
Cognex Trimmed −736,352 −$23.4M 0.6%
Commvault Systems Trimmed −122,103 −$21.3M 4.0%
Resmed Trimmed −76,618 −$19.8M 3.4%
Jack Henry & Associates Trimmed −103,506 −$18.6M 2.1%
Medpace Holdings Trimmed −59,380 −$18.6M 3.5%
Nice Trimmed −103,818 −$17.5M 2.3%

Showing the 10 largest of 59 changes.

Q1 2025

quarter ended March 31, 2025 · filed May 15, 2025

Company Action Shares changed Value of change % of portfolio
Cyberark Software Trimmed −143,638 −$48.5M 6.9%
Aspentech Exited −177,145 −$44.2M —
Varonis Systems Added +641,736 +$26M 2.1%
Fortinet Trimmed −204,418 −$19.7M 5.0%
GM Globus Med Cl A Added +261,731 +$19.2M 0.9%
Neogen Added +1,059,654 +$9.19M 1.6%
Trex Added +137,085 +$7.96M 0.7%
Cognex Trimmed −265,588 −$7.92M 1.4%
Sps Commerce Added +57,717 +$7.66M 1.4%
O'reilly Automotive Added +5,149 +$7.38M 0.3%

Showing the 10 largest of 64 changes.

Q4 2024

quarter ended December 31, 2024 · filed February 11, 2025

Company Action Shares changed Value of change % of portfolio
Cyberark Software Trimmed −141,527 −$47.1M 8.0%
Aerovironment Trimmed −251,499 −$38.7M 5.3%
MA Manhattan Assocs Trimmed −135,062 −$36.5M 4.3%
Fortinet Trimmed −356,727 −$33.7M 5.2%
Ansys Trimmed −98,455 −$33.2M 1.4%
Aci Worldwide Trimmed −479,950 −$24.9M —
Liveramp Holdings Trimmed −707,892 −$21.5M 2.5%
Qualys Trimmed −147,948 −$20.7M 2.8%
CR Charles River Labs Trimmed −110,000 −$20.3M 0.3%
Varonis Systems Added +456,083 +$20.3M 1.0%

Showing the 10 largest of 53 changes.

Q3 2024

quarter ended September 30, 2024 · filed November 14, 2024

Company Action Shares changed Value of change % of portfolio
Icon PLC Trimmed −242,296 −$69.6M 1.7%
Fortinet Trimmed −494,917 −$38.4M 4.7%
Verint Systems Trimmed −1,133,425 −$28.7M 0.1%
Ncino Added +800,317 +$25.3M 1.1%
Aspentech Added +105,254 +$25.1M 1.5%
Liveramp Holdings Added +916,578 +$22.7M 2.3%
IL Idexx Labs Trimmed −42,414 −$21.4M 4.1%
MA Manhattan Assocs Trimmed −75,188 −$21.2M 5.2%
Neogen Added +913,604 +$15.4M 1.9%
Ansys Trimmed −44,755 −$14.3M 2.2%

Showing the 10 largest of 55 changes.

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