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 |
Invesco QQQ Trust
QQQ
|
+$92M |
| 2 |
Walt Disney
DIS
|
+$25.4M |
| 3 |
Alphabet (Google) Class A
GOOGL
|
+$12.8M |
| 4 |
Baidu
BIDU
|
+$12.2M |
| 5 |
RHT
Red Hat Inc
RHT
|
+$11.6M |
Top Sells
| 1 |
iShares Russell 2000 ETF
IWM
|
+$61.4M |
| 2 |
Amazon
AMZN
|
+$59.6M |
| 3 |
Alphabet (Google) Class C
GOOG
|
+$35.5M |
| 4 |
Apple
AAPL
|
+$19.6M |
| 5 |
Financial Select Sector SPDR Fund
XLF
|
+$18.2M |
Sector Composition
| 1 | Communication Services | 16.98% |
| 2 | Technology | 12.42% |
| 3 | Healthcare | 10.02% |
| 4 | Consumer Discretionary | 8.53% |
| 5 | Industrials | 6.01% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
1601
iShares S&P Small-Cap 600 Value ETF
IJS
$6.63B
| $3K | ﹤0.01% |
+52
| New | +$3K |
|
1602
iShares Micro-Cap ETF
IWC
$948M
| $3K | ﹤0.01% |
33
+32
| +3,200% | +$2.91K |
|
1603
Korn Ferry
KFY
$3.79B
| $3K | ﹤0.01% |
85
-12,412
| -99% | -$438K |
|
1604
Lifecore Biomedical
LFCR
$281M
| $3K | ﹤0.01% |
300
-140
| -32% | -$1.4K |
|
1605
Global X Lithium & Battery Tech ETF
LIT
$1.14B
| $3K | ﹤0.01% |
140
-14,859
| -99% | -$318K |
|
1606
Lindsay Corp
LNN
$1.52B
| $3K | ﹤0.01% |
40
-204
| -84% | -$15.3K |
|
1607
Mizuho Financial
MFG
$82.2B
| $3K | ﹤0.01% |
+1,100
| New | +$3K |
|
1608
Meritage Homes
MTH
$5.61B
| $3K | ﹤0.01% |
140
-6,882
| -98% | -$147K |
|
|
NGD
1609
New Gold Inc
NGD
$5.16B
| $3K | ﹤0.01% |
+4,246
| New | +$3K |
|
1610
Novanta
NOVT
$4.12B
| $3K | ﹤0.01% |
+38
| New | +$3K |
|
1611
OraSure Technologies
OSUR
$242M
| $3K | ﹤0.01% |
356
+21
| +6% | +$177 |
|
1612
Potbelly
PBPB
$514M
| $3K | ﹤0.01% |
432
+327
| +311% | +$2.27K |
|
1613
Park Aerospace
PKE
$372M
| $3K | ﹤0.01% |
+246
| New | +$3K |
|
1614
QuidelOrtho
QDEL
$1.94B
| $3K | ﹤0.01% |
48
-3,183
| -99% | -$199K |
|
1615
QuickLogic
QUIK
$92.3M
| $3K | ﹤0.01% |
391
-647
| -62% | -$4.96K |
|
1616
REV Group
REVG
$3.02B
| $3K | ﹤0.01% |
+344
| New | +$3K |
|
1617
Regional Management Corp
RM
$418M
| $3K | ﹤0.01% |
+157
| New | +$3K |
|
1618
Regal Rexnord
RRX
$9.22B
| $3K | ﹤0.01% |
37
-150
| -80% | -$12.2K |
|
1619
SPDR Portfolio S&P 500 ETF
SPLG
$85.8B
| $3K | ﹤0.01% |
+100
| New | +$3K |
|
1620
Sapiens International
SPNS
$2.4B
| $3K | ﹤0.01% |
+243
| New | +$3K |
|
1621
Travel + Leisure Co
TNL
$4.02B
| $3K | ﹤0.01% |
80
-6,506
| -99% | -$244K |
|
1622
ReposiTrak
TRAK
$311M
| $3K | ﹤0.01% |
486
-2,455
| -83% | -$15.2K |
|
1623
Sixth Street Specialty
TSLX
$2.32B
| $3K | ﹤0.01% |
+167
| New | +$3K |
|
1624
Townsquare Media
TSQ
$115M
| $3K | ﹤0.01% |
652
-11,836
| -95% | -$54.5K |
|
1625
Universal Electronics
UEIC
$62.3M
| $3K | ﹤0.01% |
+100
| New | +$3K |
|