DOSSIER · 13F-HR · Q2 2026

DUNCKER STREETT & CO INC

$591M in tracked AUM across 521 positions as of Q2 2026.

DS
CIK 0001020585 · last filed Jun 30, 2026
Total AUM
$591M
as of Q2 2026
Holdings
521
positions
Whale Score
53
53
tracked
Activity
no data
changes this Q
AI Analysis · Q2 2026

Somewhere in the middle of this reporting window, Quanta Services' CUSIP was reissued — the security shows up in Duncker Streett & Co's filing as a full exit from the old identifier (16,019 shares, $6.76 million) and a fresh position under the new one (10,392 shares, $5.71 million), a 35% reduction in share count wrapped inside what looks structurally like a sell-and-rebuy. Zoom out from that single event and the same pattern repeats across the top of the book in ordinary form: real trims to Apple (-11.8% shares), Thermo Fisher (-19.1%), Danaher (-18.4%), NVIDIA (-11.8%), and O'Reilly Automotive (-27.2%) — genuine share-count reductions, not price-driven illusions. Four full growth-tech exits (Axon, Uber, Meta, ServiceNow) funded a rotation into small-caps (a new iShares Russell 2000 stake), defensive names (Procter & Gamble, Target), and industrials (L3Harris, KLA), as total AUM fell 6.5% to $526.1 million.

Zoom out: the same reduction, repeated across the top holdings

That Quanta trim wasn't an isolated event — it's the same posture showing up across Duncker Streett's largest positions. Apple's share count fell 11.8% (a real $2.73 million outflow), Thermo Fisher Scientific fell 19.1% ($2.33 million real outflow), Danaher fell 18.4% ($2.03 million real outflow), NVIDIA fell 11.8% ($1.93 million real outflow), and O'Reilly Automotive fell 27.2% ($1.76 million real outflow). Microsoft (-8.7%, $1.5 million real outflow) and Mastercard (-9.5%, $1.48 million real outflow) round out a pattern that touches six of the fund's ten largest names.

Analysis generated by 13F Insight from SEC Form 13F filing data · Q2 2026. Methodology

Quarter at a glance — Q2 2026

Position-change comparison pending.

No quarter-over-quarter changes available.

Top 10 holdings

By portfolio weight as of Q2 2026.

#HoldingValueSharesWeight
01
AVGO
BROADCOM INC
$26M68K4.4%
02
AAPL
APPLE INC
$25M86K4.2%
03
GOOGL
ALPHABET INC
$22M62K3.8%
04
NVDA
NVIDIA CORPORATION
$19M95K3.2%
05
ABBV
ABBVIE INC
$16M65K2.8%
06
MSFT
MICROSOFT CORP
$16M43K2.7%
07
JPM
JPMORGAN CHASE & CO
$16M49K2.7%
08
XLK
SELECT SECTOR SPDR TR
$14M75K2.4%
09
PANW
PALO ALTO NETWORKS INC
$14M41K2.3%
10
MA
MASTERCARD INCORPORATED
$14M27K2.3%

Filing history

2026Q2Jun 30
$591M 12.3%
521 positionsView →
2026Q1Mar 31
$526M 6.5%
535 positionsView →
2025Q4Dec 31
$563M 2.0%
534 positionsView →
2025Q3Sep 30
$574M 4.7%
534 positionsView →
2025Q2Jun 30
$548M 8.6%
512 positionsLocked
2025Q1Mar 31
$505M 6.3%
503 positionsLocked
2024Q4Dec 31
$539M 1.7%
530 positionsLocked
2024Q3Sep 30
$548M 5.4%
488 positionsLocked
2024Q2Jun 30
$520M 2.7%
487 positionsLocked
2024Q1Mar 31
$507M 6.9%
477 positionsLocked
2023Q4Dec 31
$474M 10.2%
490 positionsLocked
2023Q3Sep 30
$430M 3.9%
488 positionsLocked
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