AMERICAN CAPITAL MANAGEMENT INC
SEC Form 13F institutional filer · CIK 0001320168
13F-HR · 22 reported holdings · 2026-03-31
Reported long-US-equity value
$0.65B
Top-10 concentration
91.3%
AMERICAN CAPITAL MANAGEMENT INC — $652M AUM allocation strategy
AMERICAN CAPITAL MANAGEMENT INC files SEC Form 13F and reports $652M of long US equity value across 22 reported holdings for 2026-03-31.
Its largest sector bet is Health Care 40.3%, followed by Information Technology 33.6% and Communication Services 12.3%.
The top 10 holdings account for 91% of reported value — a conviction-weighted book concentrated in its best ideas. The sector and industry splits below are of the same reported value. Track quarter-over-quarter adds, trims, new positions and exits below — sourced from SEC 13F filings, public domain.
AMERICAN CAPITAL MANAGEMENT INC — latest SEC 13F insights
Reported long-US-equity value (13F AUM)
$652M
total across 22 reported holdings · 2026-03-31 · excludes shorts, cash, non-US
Top-10 concentration
91% of value
higher = narrower conviction; lower = spread / hedging
Biggest adds (shares)
+$TECH +80K sh · −$1.98M+$TYL +76.9K sh · +$23.9M+$DXCM +2.7K sh · −$719K
Biggest trims (shares)
−$T −211K sh · −$76.8M−$FTNT −96.8K sh · −$5.77M−$FDS −91.9K sh · −$29.8M
Sector allocation (share of reported value)
each slice is a share of the reported long-US-equity value — smaller sectors and the rest of the book roll into “Other holdings”
Qtr shift = share-point change vs the prior quarter's filing — first period tracked for this filer; the column fills in with the next quarterly refresh.
Industry allocation (share of reported value)
- Health Care Equipment26.5%—
- Systems Software25.7%—
- Integrated Telecommunication Services12.3%—
- Life Sciences Tools & Services8.2%—
- Application Software6.6%—
- Transaction & Payment Processing Services5.9%—
- Health Care Technology5.6%—
- Real Estate Services5.1%—
- Other holdings4.2%—
the finer GICS cut of the same book — same denominator — smaller industries roll into “Other holdings”
Qtr shift = share-point change vs the prior quarter's filing — first period tracked for this filer; the column fills in with the next quarterly refresh.
Top S&P 500 holdings
10 of 10 rows · sorted by Value ↓
| Ticker | Holding | Shares | Value | Δ QoQ | Weight |
|---|---|---|---|---|---|
| $PANW | Palo Alto Networks Inc | 624K | $100M | — | 15.3% |
| $IDXX | IDEXX Laboratories Inc | 166K | $93.3M | -15.7K | 14.3% |
| $T | AT&T Inc | 436K | $79.9M | -211K | 12.2% |
| $FTNT | Fortinet Inc | 829K | $67.7M | -96.8K | 10.4% |
| $RMD | ResMed Inc | 265K | $59.6M | -41.6K | 9.1% |
| $TECH | Bio-Techne Corp | 1.02M | $53.4M | +80K | 8.2% |
| $JKHY | Jack Henry & Associates Inc | 243K | $38.4M | -8.26K | 5.9% |
| $VEEV | Veeva Systems Inc | 206K | $36.2M | -16.2K | 5.6% |
| $TYL | Tyler Technologies Inc | 98.9K | $33.9M | +76.9K | 5.2% |
| $CSGP | CoStar Group Inc | 825K | $33.3M | -44 | 5.1% |
…and 12 more holdings in the full 13F filing (top positions only shown).
SEC Form 13F data sets · public domain · 45-day filing lag · >$100M AUM managers · as reported
← All 13F filers·← QuantOrb.pro
How to read Δ QoQ — the five insight categories, and the caveats
The categories. Analysts, quants and retail traders look past total portfolio value to isolate actionable signals. Five categories matter.
Conviction & concentration shifts
New positions vs complete exits — a brand-new stock signals high conviction; a full liquidation suggests a broken thesis or tax-loss harvesting. Aggressive sizing — look at share count, not dollars: a 20% share increase during a drawdown is strong dip-buying. Concentration — a narrowing top-5/10 means conviction; spreading capital across more names means hedging.
Sector & macro allocation rotations
Aggregating Δ QoQ moves across sectors shows where smart money is leaning in or sneaking out — rotating out of growth into defensives or energy, for example. The fund's total long equity exposure quarter-over-quarter is a proxy for overall institutional risk appetite.
Crowding & smart-money consensus
When several managers initiate or expand the same stock in the same quarter, that is institutional consensus. Contrarian reads: top pickers buying hard into a beaten-down name the market is selling.
Derivative & option overlays
Reported call/put changes indicate whether managers are adding downside hedges or leveraging upside exposure. Note: a long increase may be half of a market-neutral pair trade.
Who reads this
| Retail "cloners" | High-conviction ideas to replicate ~45 days after quarter-end. |
| Corporate IR | Which funds bought or dumped the stock, before the next call. |
| Quant / algo traders | Cross-sectional factor inputs: flow, momentum, ownership. |
Four caveats before you trade on it
- 45-day lag — holdings are quarter-end; positions may already be closed.
- Long-only — 13Fs miss shorts, pair trades and cash.
- No non-US / fixed income — the picture is US equities plus options.
- Corporate actions — splits and spinoffs distort raw share deltas.
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