Mayflower Financial Advisors, LLC
SEC Form 13F institutional filer · CIK 0001852930
13F-HR · 195 reported holdings · 2026-03-31
Reported long-US-equity value
$0.53B
Top-10 concentration
50.5%
Mayflower Financial Advisors, LLC — $529M AUM allocation strategy
Mayflower Financial Advisors, LLC files SEC Form 13F and reports $529M of long US equity value across 195 reported holdings for 2026-03-31.
Its largest sector bet is Financials 17.0%, followed by Information Technology 10.8% and Communication Services 4.1%.
The top 10 holdings account for 50% 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.
Mayflower Financial Advisors, LLC — latest SEC 13F insights
Reported long-US-equity value (13F AUM)
$529M
total across 195 reported holdings · 2026-03-31 · excludes shorts, cash, non-US
Top-10 concentration
50% of value
higher = narrower conviction; lower = spread / hedging
Biggest adds (shares)
+$IVV +112K sh · −$1.36M+$SCHW +65.4K sh · +$3.42M+$SPYM +51.4K sh · +$2.74M
Biggest trims (shares)
−$IVZ −11.4K sh · −$5.18M−$MS −9K sh · −$1.96M−$BLK −7.06K sh · −$1.39M
Exited to nil (held last quarter, gone now)
$ZTS ($493K last qtr)$BRO ($371K last qtr)$MKC ($269K last qtr)$CEG ($246K last qtr)$MNST ($244K last qtr)
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)
- Asset Management & Custody Banks5.9%—
- Investment Banking & Brokerage5.7%—
- Technology Hardware, Storage & Peripherals4.2%—
- Interactive Media & Services4.1%—
- Financial Exchanges & Data3.7%—
- Semiconductors3.5%—
- Systems Software3.1%—
- Multi-Sector Holdings1.7%—
- Other holdings68.0%—
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
7 of 7 rows · sorted by Value ↓
| Ticker | Holding | Shares | Value | Δ QoQ | Weight |
|---|---|---|---|---|---|
| $SCHW | Charles Schwab Corporation | 1.1M | $30.2M | +65.4K | 5.7% |
| $AAPL | Apple Inc | 87.4K | $22.2M | -279 | 4.2% |
| $BLK | BlackRock Inc | 225K | $21.3M | -7.06K | 4.0% |
| $SPGI | S&P Global Inc | 86.5K | $19.4M | +638 | 3.7% |
| $MSFT | Microsoft Corporation | 44.2K | $16.3M | +148 | 3.1% |
| $NVDA | NVIDIA Corporation | 70.2K | $12.2M | +3.86K | 2.3% |
| $GOOG | Alphabet Inc. Class C Capital Stock | 42.3K | $12.2M | -315 | 2.3% |
…and 188 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
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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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