MARTINGALE ASSET MANAGEMENT L P
SEC Form 13F institutional filer · CIK 0000936944
13F-HR · 210 reported holdings · 2026-03-31
SEC-registered institutional investment manager.
Reported long-US-equity value
$2.72B
Top-10 concentration
16.2%
MARTINGALE ASSET MANAGEMENT L P — $2.72B AUM allocation strategy
MARTINGALE ASSET MANAGEMENT L P files SEC Form 13F and reports $2.72B of long US equity value across 210 reported holdings for 2026-03-31.
Its largest sector bet is Health Care 6.9%, followed by Communication Services 5.6% and Information Technology 5.1%.
The top 10 holdings account for 16% of reported value — a broadly spread portfolio. 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.
MARTINGALE ASSET MANAGEMENT L P — latest SEC 13F insights
Reported long-US-equity value (13F AUM)
$2.72B
total across 210 reported holdings · 2026-03-31 · excludes shorts, cash, non-US
Top-10 concentration
16% of value
higher = narrower conviction; lower = spread / hedging
Biggest adds (shares)
+$GM +136K sh · +$9.77M+$HST +128K sh · +$2.8M+$DHI +87.5K sh · +$3.13M
Biggest trims (shares)
−$CMCSA −190K sh · −$5.96M−$ADBE −178K sh · −$12.1M−$PPL −167K sh · −$5.82M
Exited to nil (held last quarter, gone now)
$EOG ($15.3M last qtr)$BSX ($1.39M last qtr)$BAC ($1.09M last qtr)$NCLH ($940K last qtr)$ALLE ($846K 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)
- Pharmaceuticals5.6%—
- Integrated Oil & Gas3.0%—
- Interactive Media & Services2.9%—
- Consumer Staples Merchandise Retail2.8%—
- Integrated Telecommunication Services2.6%—
- Technology Hardware, Storage & Peripherals2.0%—
- Systems Software1.6%—
- Broadline Retail1.6%—
- Other holdings77.8%—
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
10 of 10 rows · sorted by Value ↓
| Ticker | Holding | Shares | Value | Δ QoQ | Weight |
|---|---|---|---|---|---|
| $AAPL | Apple Inc | 218K | $55.4M | +1.37K | 2.0% |
| $JNJ | Johnson & Johnson | 192K | $46.9M | -35.4K | 1.7% |
| $XOM | ExxonMobil Holdings Corporation | 277K | $46.9M | -38.9K | 1.7% |
| $GOOG | Alphabet Inc. Class C Capital Stock | 162K | $46.5M | -8.45K | 1.7% |
| $MSFT | Microsoft Corporation | 120K | $44.4M | +11.9K | 1.6% |
| $AMZN | Amazon.com Inc | 212K | $44.3M | -13.4K | 1.6% |
| $BRK.B | Berkshire Hathaway Inc.-Class B | 84K | $40.2M | +1.36K | 1.5% |
| $WMT | Walmart Inc | 314K | $39M | -26.9K | 1.4% |
| $CSCO | Cisco Systems Inc | 502K | $39M | -46.1K | 1.4% |
| $T | AT&T Inc | 1.3M | $37.7M | -162K | 1.4% |
…and 200 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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