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 |
Apple
AAPL
|
+$80M |
| 2 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$45.3M |
| 3 |
Alphabet (Google) Class C
GOOG
|
+$38.8M |
| 4 |
Amazon
AMZN
|
+$38.6M |
| 5 |
Tesla
TSLA
|
+$36M |
Top Sells
| 1 |
Alibaba
BABA
|
+$46.4M |
| 2 |
Boeing
BA
|
+$29.8M |
| 3 |
SPDR Gold Trust
GLD
|
+$18.2M |
| 4 |
Biogen
BIIB
|
+$15.8M |
| 5 |
NVIDIA
NVDA
|
+$14.3M |
Sector Composition
| 1 | Technology | 22.73% |
| 2 | Consumer Discretionary | 17.54% |
| 3 | Communication Services | 10.03% |
| 4 | Healthcare | 9.29% |
| 5 | Industrials | 5.63% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
1651
iShares MSCI Pacific ex Japan ETF
EPP
$1.85B
| $7K | ﹤0.01% |
168
-30
| -15% | -$1.25K |
|
1652
Fulton Financial
FULT
$3.54B
| $7K | ﹤0.01% |
+443
| New | +$7K |
|
1653
Golden Entertainment
GDEN
$638M
| $7K | ﹤0.01% |
405
+306
| +309% | +$5.29K |
|
1654
Gulf Island Fabrication
GIFI
$122M
| $7K | ﹤0.01% |
1,468
+1,292
| +734% | +$6.16K |
|
1655
Littelfuse
LFUS
$6.54B
| $7K | ﹤0.01% |
+41
| New | +$7K |
|
1656
Perion Network
PERI
$418M
| $7K | ﹤0.01% |
+1,147
| New | +$7K |
|
1657
PennantPark Floating Rate Capital
PFLT
$1.01B
| $7K | ﹤0.01% |
+626
| New | +$7K |
|
1658
QuickLogic
QUIK
$92.3M
| $7K | ﹤0.01% |
1,237
-113
| -8% | -$639 |
|
1659
Ribbon Communications
RBBN
$676M
| $7K | ﹤0.01% |
+2,411
| New | +$7K |
|
1660
RPC Inc
RES
$986M
| $7K | ﹤0.01% |
1,445
-10,228
| -88% | -$49.5K |
|
1661
REV Group
REVG
$3.02B
| $7K | ﹤0.01% |
603
-1,026
| -63% | -$11.9K |
|
1662
Sasol
SSL
$4.46B
| $7K | ﹤0.01% |
+350
| New | +$7K |
|
|
SUP
1663
DELISTED
Superior Industries International
SUP
| $7K | ﹤0.01% |
1,948
-1,057
| -35% | -$3.8K |
|
1664
Trustmark
TRMK
$2.43B
| $7K | ﹤0.01% |
207
-1,835
| -90% | -$62.1K |
|
1665
Valmont Industries
VMI
$7.37B
| $7K | ﹤0.01% |
53
-1,986
| -97% | -$262K |
|
1666
Zumiez
ZUMZ
$347M
| $7K | ﹤0.01% |
+217
| New | +$7K |
|
|
BGG
1667
DELISTED
Briggs & Stratton Corp.
BGG
| $7K | ﹤0.01% |
1,171
-5,270
| -82% | -$31.5K |
|
|
MACK
1668
DELISTED
Merrimack Pharmaceuticals, Inc.
MACK
| $7K | ﹤0.01% |
2,512
-872
| -26% | -$2.43K |
|
|
AAT
1669
American Assets Trust
AAT
$1.27B
| $6K | ﹤0.01% |
150
+106
| +241% | +$4.24K |
|
1670
Axcelis
ACLS
$2.69B
| $6K | ﹤0.01% |
+261
| New | +$6K |
|
1671
Autohome
ATHM
$3.48B
| $6K | ﹤0.01% |
+86
| New | +$6K |
|
1672
Popular Inc
BPOP
$8.34B
| $6K | ﹤0.01% |
+109
| New | +$6K |
|
1673
China Automotive Systems
CAAS
$138M
| $6K | ﹤0.01% |
+1,947
| New | +$6K |
|
1674
Fidus Investment
FDUS
$760M
| $6K | ﹤0.01% |
434
-2,771
| -86% | -$38.3K |
|
1675
FS KKR Capital
FSK
$4.91B
| $6K | ﹤0.01% |
268
-13,702
| -98% | -$307K |
|