Mariner, LLC
SEC Form 13F institutional filer · CIK 0001373442
13F-HR · 494 reported holdings · 2026-03-31
SEC-registered institutional investment manager.
Reported long-US-equity value
$63.61B
Top-10 concentration
46.1%
Mariner, LLC — $63.6B AUM allocation strategy
Mariner, LLC files SEC Form 13F and reports $63.6B of long US equity value across 494 reported holdings for 2026-03-31.
Its largest sector bet is Information Technology 19.3%, followed by Financials 7.4% and Communication Services 4.6%.
The top 10 holdings account for 46% 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.
Mariner, LLC — latest SEC 13F insights
Reported long-US-equity value (13F AUM)
$63.6B
total across 494 reported holdings · 2026-03-31 · excludes shorts, cash, non-US
Top-10 concentration
46% of value
higher = narrower conviction; lower = spread / hedging
Biggest adds (shares)
+$IVV +6.49M sh · +$322M+$SCHW +5.18M sh · +$206M+$FAST +2.6M sh · +$131M
Biggest trims (shares)
−$ABT −1.11M sh · −$156M−$NOW −1.09M sh · −$211M−$TMUS −789K sh · −$159M
Exited to nil (held last quarter, gone now)
$BRO ($6.23M last qtr)$ROL ($4.8M last qtr)$JKHY ($3.84M last qtr)$STLD ($3.58M last qtr)$AOS ($3.56M 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)
- Semiconductors8.9%—
- Technology Hardware, Storage & Peripherals7.1%—
- Interactive Media & Services4.6%—
- Investment Banking & Brokerage3.7%—
- Systems Software3.4%—
- Broadline Retail2.2%—
- Diversified Banks1.4%—
- Financial Exchanges & Data1.3%—
- Other holdings67.5%—
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 |
|---|---|---|---|---|---|
| $NVDA | NVIDIA Corporation | 26.2M | $4.57B | +697K | 7.2% |
| $AAPL | Apple Inc | 17.7M | $4.49B | +427K | 7.1% |
| $SCHW | Charles Schwab Corporation | 78.2M | $2.36B | +5.18M | 3.7% |
| $MSFT | Microsoft Corporation | 5.79M | $2.14B | +412K | 3.4% |
| $AMZN | Amazon.com Inc | 6.68M | $1.39B | +417K | 2.2% |
| $GOOG | Alphabet Inc. Class C Capital Stock | 4.67M | $1.34B | +252K | 2.1% |
| $AVGO | Broadcom Inc | 3.54M | $1.1B | -323K | 1.7% |
…and 487 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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