What is Δ QoQ in a Form 13F?

Δ QoQ is the quarter-over-quarter change in the number of shares a manager reports for a holding, comparing the latest 13F with the previous quarter's filing. It separates a manager's action from the effect of price moves: a 20% share-count rise during a drawdown signals dip-buying conviction, while a share-count cut during a rally can mean profit-taking.

What does a 13F not show?

Four blind spots: (1) 45-day lag — filings cover quarter-end but arrive up to 45 days later; (2) long-only US equities and options — short positions, pair trades and market-neutral halves are invisible; (3) no non-US equities, fixed income or cash; (4) corporate actions (splits, spinoffs) distort raw share-count deltas.

How do I use these Δ QoQ insights?

Start with the per-filer chips: biggest adds and trims by share count, positions added from nil, complete exits, top-10 concentration and the sector/industry split of the largest holdings. Then read them in context: a new position signals high conviction, a complete exit can mean a broken thesis, and multi-manager consensus on the same stock is the strongest signal of institutional crowding. The caveats above always apply.

NORTHERN TRUST CORP

SEC Form 13F institutional filer · CIK 0000073124

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Financial services company, asset manager and custodian bank.

NORTHERN TRUST CORP — $631B AUM allocation strategy

NORTHERN TRUST CORP files SEC Form 13F and reports $631B of long US equity value across 522 S&P 500 holdings for 2026-03-31.

Its largest sector bet is Information Technology 20%, followed by Communication Services 7% and Consumer Discretionary 5%. Within sectors, the top industry exposure is Semiconductors 9%, then Interactive Media & Services 7% and Technology Hardware, Storage & Peripherals 6%.

The top 10 holdings account for 34% of reported value — a broadly spread portfolio. Sector and industry shares above are of the same reported value. Track quarter-over-quarter adds, trims, new positions and exits below — sourced from SEC 13F filings, public domain.

NORTHERN TRUST CORP — latest SEC 13F insights

Reported long-US-equity value (13F AUM)$631Btotal across 522 S&P 500 holdings · 2026-03-31 · excludes shorts, cash, non-US

Top-10 concentration34% of valuehigher = narrower conviction; lower = spread / hedging

Biggest adds (shares)$IVV $HBAN $FITB+$IVV +5.18M sh · −$1.00e+3K+$HBAN +4.58M sh · +$47.6M+$FITB +2.16M sh · +$98.1M

Biggest trims (shares)$AMCR $AAPL $BAC−$AMCR −15.7M sh · −$12.8M−$AAPL −1.4M sh · −$3.26B−$BAC −1.4M sh · −$472M

Added from nil (new positions)None this quarter

Exited to nil (held last quarter, gone now)None this quarter

Sector allocation (share of reported value)

$XLK Information Technology 20%$XLC Communication Services 7%$XLY Consumer Discretionary 5%ETFs 4%$XLF Financials 3%

each slice is a share of the reported long-US-equity value — smaller positions roll into “Other holdings”

Industry allocation (share of reported value)

Semiconductors 9%Interactive Media & Services 7%Technology Hardware, Storage & Peripherals 6%Systems Software 5%ETFs 4%

the finer GICS cut of the same book — same denominator

Ticker	Holding	Shares	Value	Δ QoQ
$NVDA	NVIDIA Corporation	253M	$44.1B	-1.05M
$AAPL	Apple Inc	159M	$40.4B	-1.4M
$MSFT	Microsoft Corporation	79.7M	$29.5B	-83K
$AMZN	Amazon.com Inc	95.1M	$19.8B	+381K
$GOOG	Alphabet Inc. Class C Capital Stock	65M	$18.7B	-149K
$GOOGL	Alphabet Inc	52.3M	$15B	-39.3K
$AVGO	Broadcom Inc	47.6M	$14.7B	-118K
$META	Meta Platforms Inc	22.2M	$12.6B	-146K
$IVV	IVV	78.7M	$11.7B	+5.18M
$TSLA	Tesla Inc	25.7M	$9.54B	-145K

SEC Form 13F data sets · public domain · 45-day filing lag · >$100M AUM managers · as reported

← Sector Orb All 13F filers

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.