McMillan Office, Inc.
SEC Form 13F institutional filer · CIK 0002109205
13F-HR · 262 reported holdings · 2026-03-31
SEC-registered institutional investment manager.
Reported long-US-equity value
$0.74B
Top-10 concentration
59.6%
McMillan Office, Inc. — $743M AUM allocation strategy
McMillan Office, Inc. files SEC Form 13F and reports $743M of long US equity value across 262 reported holdings for 2026-03-31.
Its largest sector bet is Communication Services 25.3%, followed by Information Technology 19.3% and Financials 6.5%.
The top 10 holdings account for 60% 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.
McMillan Office, Inc. — latest SEC 13F insights
Reported long-US-equity value (13F AUM)
$743M
total across 262 reported holdings · 2026-03-31 · excludes shorts, cash, non-US
Top-10 concentration
60% of value
higher = narrower conviction; lower = spread / hedging
Biggest adds (shares)
+$AMZN +4.82K sh · −$2.18M+$MSFT +2.09K sh · −$12.1M+$NVDA +1.54K sh · +$177K
Biggest trims (shares)
−$PFE −13K sh · +$790K−$PYPL −4.36K sh · −$1.63M−$MRK −3.3K sh · +$133K
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)
- Interactive Media & Services25.3%—
- Technology Hardware, Storage & Peripherals11.8%—
- Systems Software5.8%—
- Broadline Retail4.1%—
- Diversified Banks3.4%—
- Consumer Finance3.1%—
- Pharmaceuticals2.9%—
- Soft Drinks & Non-alcoholic Beverages2.8%—
- Other holdings40.8%—
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
9 of 9 rows · sorted by Value ↓
| Ticker | Holding | Shares | Value | Δ QoQ | Weight |
|---|---|---|---|---|---|
| $GOOG | Alphabet Inc. Class C Capital Stock | 328K | $94.3M | -957 | 12.7% |
| $AAPL | Apple Inc | 346K | $87.7M | +1.35K | 11.8% |
| $GOOGL | Alphabet Inc | 180K | $51.7M | -560 | 7.0% |
| $MSFT | Microsoft Corporation | 116K | $42.9M | +2.09K | 5.8% |
| $META | Meta Platforms Inc | 73.1K | $41.8M | +104 | 5.6% |
| $AMZN | Amazon.com Inc | 146K | $30.4M | +4.82K | 4.1% |
| $ABBV | AbbVie Inc | 78.7K | $17.1M | -125 | 2.3% |
| $RTX | RTX Corporation | 85.5K | $16.5M | -400 | 2.2% |
| $XOM | ExxonMobil Holdings Corporation | 95.9K | $16.3M | -1.32K | 2.2% |
…and 253 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.
Newsletter signup
Free subscription. Daily trading day morning dispatch. No spam.