Simplex Trading Portfolio holdings
Simplex Trading, founded in 2004 and headquartered in Chicago, Illinois, is a technology-driven proprietary trading firm specializing in market-making and liquidity provision, primarily in U.S. equity options and futures options. Leveraging advanced proprietary software and data-driven analysis, the firm optimizes trading strategies and develops innovative solutions to capitalize on financial market opportunities, maintaining a competitive edge through automation and a collaborative team of technologists and traders. With a workforce exceeding 300 and led by CEO Erik Swanson since 2014, Simplex operates with a low-ego, high-intelligence culture, focusing on minimal bureaucracy and rapid execution, while also making strategic venture capital investments in fintech startups. Recognized as a top workplace in Chicago by Built In’s 2025 awards, Simplex continues to evolve, blending cutting-edge technology with a commitment to market efficiency and growth.
Top Buys
| 1 |
Amazon
AMZN
|
+$84.3M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$37M |
| 3 |
Amgen
AMGN
|
+$32.3M |
| 4 |
Micron Technology
MU
|
+$29.4M |
| 5 |
Qualcomm
QCOM
|
+$18M |
Top Sells
| 1 |
SPDR S&P 500 ETF Trust
SPY
|
+$29.8M |
| 2 |
Gilead Sciences
GILD
|
+$29.3M |
| 3 |
Goldman Sachs
GS
|
+$27.7M |
| 4 |
Booking.com
BKNG
|
+$26M |
| 5 |
AT&T
T
|
+$20.8M |
Sector Composition
| 1 | Technology | 20.65% |
| 2 | Communication Services | 17.64% |
| 3 | Consumer Discretionary | 14.77% |
| 4 | Healthcare | 11.1% |
| 5 | Financials | 6.35% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
576
Enovis
ENOV
$1.79B
| $255K | 0.01% |
3,774
+1,791
| +90% | +$121K |
|
577
Louisiana-Pacific
LPX
$6.68B
| $255K | 0.01% |
+10,589
| New | +$255K |
|
|
WES
578
DELISTED
Western Gas Partners Lp
WES
| $254K | 0.01% |
+4,542
| New | +$254K |
|
579
MSCI
MSCI
$44.1B
| $253K | 0.01% |
2,463
+1,940
| +371% | +$199K |
|
|
STON
580
DELISTED
StoneMor Inc.
STON
| $253K | 0.01% |
26,853
-15,155
| -36% | -$143K |
|
|
BBL
581
DELISTED
BHP Group Plc American Depositary Shares (Each representing two Ordinary Shares)
BBL
| $253K | 0.01% |
8,257
-24,734
| -75% | -$758K |
|
582
BioMarin Pharmaceuticals
BMRN
$10.5B
| $252K | 0.01% |
2,778
-93
| -3% | -$8.44K |
|
583
Lipocine
LPCN
$15.9M
| $251K | 0.01% |
3,686
+3,628
| +6,255% | +$247K |
|
|
WOOF
584
DELISTED
VCA Inc.
WOOF
| $251K | 0.01% |
2,721
+1,544
| +131% | +$142K |
|
585
MGM Resorts International
MGM
$9.84B
| $250K | 0.01% |
+8,003
| New | +$250K |
|
586
Prologis
PLD
$104B
| $248K | 0.01% |
+4,244
| New | +$248K |
|
|
INTX
587
DELISTED
Intersections, Inc.
INTX
| $248K | 0.01% |
52,855
-2,483
| -4% | -$11.7K |
|
588
Commercial Metals
CMC
$6.6B
| $245K | 0.01% |
+12,640
| New | +$245K |
|
589
TAL Education Group
TAL
$6.4B
| $244K | 0.01% |
11,970
+5,190
| +77% | +$106K |
|
590
Charles River Laboratories
CRL
$7.7B
| $243K | 0.01% |
2,406
+2,370
| +6,583% | +$239K |
|
591
Magnachip Semiconductor
MX
$111M
| $241K | 0.01% |
24,669
+20,963
| +566% | +$205K |
|
592
Arrow Electronics
ARW
$6.51B
| $238K | 0.01% |
+3,037
| New | +$238K |
|
|
NSM
593
DELISTED
Nationstar Mortgage Holdings
NSM
| $238K | 0.01% |
13,331
-16,804
| -56% | -$300K |
|
594
Gogo Inc
GOGO
$1.41B
| $237K | 0.01% |
20,608
+77
| +0.4% | +$886 |
|
595
H&R Block
HRB
$6.75B
| $237K | 0.01% |
7,694
-19,257
| -71% | -$593K |
|
596
NETSCOUT
NTCT
$1.81B
| $237K | 0.01% |
+6,897
| New | +$237K |
|
597
Cirrus Logic
CRUS
$5.78B
| $236K | 0.01% |
3,773
-6,532
| -63% | -$409K |
|
598
iShares Core MSCI Emerging Markets ETF
IEMG
$105B
| $236K | 0.01% |
4,731
+3,638
| +333% | +$181K |
|
599
NatWest
NWG
$57.7B
| $236K | 0.01% |
+33,580
| New | +$236K |
|
|
QEP
600
DELISTED
QEP RESOURCES, INC.
QEP
| $235K | 0.01% |
+23,288
| New | +$235K |
|