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
|
+$144M |
| 2 |
Invesco QQQ Trust
QQQ
|
+$68.7M |
| 3 |
AT&T
T
|
+$45.5M |
| 4 |
Meta Platforms (Facebook)
META
|
+$38M |
| 5 |
iShares MSCI Emerging Markets ETF
EEM
|
+$35.4M |
Top Sells
| 1 |
Microsoft
MSFT
|
+$94.2M |
| 2 |
Citigroup
C
|
+$62.3M |
| 3 |
JPMorgan Chase
JPM
|
+$56.2M |
| 4 |
Berkshire Hathaway Class B
BRK.B
|
+$45.8M |
| 5 |
SPDR Gold Trust
GLD
|
+$44.4M |
Sector Composition
| 1 | Consumer Discretionary | 16.85% |
| 2 | Technology | 15.5% |
| 3 | Communication Services | 10.53% |
| 4 | Healthcare | 8.8% |
| 5 | Consumer Staples | 5.63% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
601
SPDR S&P China ETF
GXC
$502M
| $350K | ﹤0.01% |
4,470
-167
| -4% | -$13.1K |
|
602
Darling Ingredients
DAR
$5.01B
| $348K | ﹤0.01% |
+5,574
| New | +$348K |
|
603
iShares Core S&P Total US Stock Market ETF
ITOT
$76.7B
| $347K | ﹤0.01% |
4,100
-1,849
| -31% | -$156K |
|
604
First Horizon
FHN
$11.6B
| $346K | ﹤0.01% |
14,136
-23,911
| -63% | -$585K |
|
605
Strategy Inc Common Stock Class A
MSTR
$93.1B
| $342K | ﹤0.01% |
24,160
-38,790
| -62% | -$549K |
|
606
Adtran
ADTN
$831M
| $341K | ﹤0.01% |
18,192
-2,147
| -11% | -$40.2K |
|
607
iShares MSCI Chile ETF
ECH
$726M
| $341K | ﹤0.01% |
12,594
-3,132
| -20% | -$84.8K |
|
608
Open Text
OTEX
$9.06B
| $341K | ﹤0.01% |
11,520
+1,043
| +10% | +$30.9K |
|
|
HUYA
609
Huya Inc
HUYA
$760M
| $340K | ﹤0.01% |
86,122
+41,209
| +92% | +$163K |
|
610
AngloGold Ashanti
AU
$32.7B
| $339K | ﹤0.01% |
+17,461
| New | +$339K |
|
611
Rapid7
RPD
$1.28B
| $338K | ﹤0.01% |
+9,974
| New | +$338K |
|
612
Lumentum
LITE
$11.5B
| $336K | ﹤0.01% |
+6,457
| New | +$336K |
|
613
Hims & Hers Health
HIMS
$11.4B
| $334K | ﹤0.01% |
52,212
-17,498
| -25% | -$112K |
|
614
Olaplex Holdings
OLPX
$947M
| $334K | ﹤0.01% |
64,219
-12,455
| -16% | -$64.8K |
|
|
MRNS
615
DELISTED
Marinus Pharmaceuticals, Inc
MRNS
| $334K | ﹤0.01% |
84,005
+50,663
| +152% | +$201K |
|
616
Invesco Golden Dragon China ETF
PGJ
$157M
| $331K | ﹤0.01% |
+12,115
| New | +$331K |
|
617
WisdomTree Emerging Markets High Dividend Fund
DEM
$3.19B
| $329K | ﹤0.01% |
9,256
+7,810
| +540% | +$278K |
|
|
ITCI
618
DELISTED
Intra-Cellular Therapies Inc.
ITCI
| $327K | ﹤0.01% |
6,189
-5,242
| -46% | -$277K |
|
619
Hudbay
HBM
$5.38B
| $326K | ﹤0.01% |
64,424
-22,063
| -26% | -$112K |
|
620
W.P. Carey
WPC
$14.9B
| $326K | ﹤0.01% |
+4,260
| New | +$326K |
|
621
Inotiv
NOTV
$48.8M
| $325K | ﹤0.01% |
+65,965
| New | +$325K |
|
622
Comfort Systems
FIX
$27.1B
| $322K | ﹤0.01% |
2,805
+1,761
| +169% | +$202K |
|
623
DocGo
DCGO
$150M
| $321K | ﹤0.01% |
+45,429
| New | +$321K |
|
624
Ituran Location and Control
ITRN
$689M
| $320K | ﹤0.01% |
15,149
+5,769
| +62% | +$122K |
|
625
Pilgrim's Pride
PPC
$10.4B
| $319K | ﹤0.01% |
+13,458
| New | +$319K |
|