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.

Granahan Investment Management, LLC

SEC Form 13F institutional filer · CIK 0001026710

13F-HR · 6 reported holdings · 2026-03-31

Reported long-US-equity value

$0.11B

Top-10 concentration

100.0%

Granahan Investment Management, LLC — $108M AUM allocation strategy

Granahan Investment Management, LLC files SEC Form 13F and reports $108M of long US equity value across 6 reported holdings for 2026-03-31.

Its largest sector bet is Industrials 71.0%, followed by Financials 16.1% and Communication Services 6.9%.

The top 10 holdings account for 100% 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.

Granahan Investment Management, LLC — latest SEC 13F insights

Reported long-US-equity value (13F AUM)

$108M

total across 6 reported holdings · 2026-03-31 · excludes shorts, cash, non-US

Top-10 concentration

100% of value

higher = narrower conviction; lower = spread / hedging

Biggest adds (shares)

$CSGP $AXON

+$CSGP +69.1K sh · +$315K+$AXON +15K sh · −$4.48M

Biggest trims (shares)

$BX $FIX

−$BX −60.1K sh · −$408K−$FIX −8 sh · +$11.6M

Added from nil (new positions)

$T $GNRC

2 fresh holdings — new conviction

Exited to nil (held last quarter, gone now)

$LITE $IWM

$LITE ($10.5M last qtr)$IWM ($364K last qtr)

Sector allocation (share of reported value)

$XLIIndustrials71.0%—
$XLFFinancials16.1%—
$XLCCommunication Services6.9%—
$XLREReal Estate6.0%—

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)

Aerospace & Defense35.5%—
Construction & Engineering33.1%—
Asset Management & Custody Banks16.1%—
Integrated Telecommunication Services6.9%—
Real Estate Services6.0%—
Heavy Electrical Equipment2.4%—

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

6 of 6 rows · sorted by Value ↓

Ticker	Holding	Shares	Value	Δ QoQ	Weight
$AXON	Axon Enterprise Inc	90.7K	$38.5M	+15K	35.5%
$FIX	Comfort Systems USA Inc	26K	$35.9M	-8	33.1%
$BX	Blackstone Inc	775K	$17.5M	-60.1K	16.1%
$T	AT&T Inc	40.7K	$7.46M	—	6.9%
$CSGP	CoStar Group Inc	161K	$6.5M	+69.1K	6.0%
$GNRC	Generac Holdlings Inc	13.2K	$2.58M	—	2.4%

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.

Free subscription. Daily trading day morning dispatch. No spam.