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 |
Alibaba
BABA
|
+$48.9M |
| 2 |
Boeing
BA
|
+$25.8M |
| 3 |
SPDR Gold Trust
GLD
|
+$18.2M |
| 4 |
Biogen
BIIB
|
+$15.8M |
| 5 |
FedEx
FDX
|
+$13.6M |
Top Sells
| 1 |
Alphabet (Google) Class C
GOOG
|
+$62.1M |
| 2 |
iShares Russell 2000 ETF
IWM
|
+$36.4M |
| 3 |
Industrial Select Sector SPDR Fund
XLI
|
+$17.5M |
| 4 |
Netflix
NFLX
|
+$16.3M |
| 5 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$14.6M |
Sector Composition
| 1 | Consumer Discretionary | 16.74% |
| 2 | Technology | 16.32% |
| 3 | Healthcare | 12.17% |
| 4 | Industrials | 12.14% |
| 5 | Communication Services | 7.05% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
526
Stratasys
SSYS
$834M
| $320K | ﹤0.01% |
15,050
-9,190
| -38% | -$195K |
|
|
LOMA
527
Loma Negra
LOMA
$939M
| $317K | ﹤0.01% |
55,159
+27,241
| +98% | +$157K |
|
528
Sunrun
RUN
$3.74B
| $317K | ﹤0.01% |
+19,028
| New | +$317K |
|
|
RDFN
529
DELISTED
Redfin
RDFN
| $316K | ﹤0.01% |
+18,782
| New | +$316K |
|
530
TAL Education Group
TAL
$6.37B
| $316K | ﹤0.01% |
9,258
-6,079
| -40% | -$207K |
|
531
Toronto Dominion Bank
TD
$130B
| $316K | ﹤0.01% |
+5,430
| New | +$316K |
|
532
ProShares UltraShort Bloomberg Crude Oil
SCO
$120M
| $313K | ﹤0.01% |
966
+956
| +9,560% | +$310K |
|
533
POSCO
PKX
$15.5B
| $311K | ﹤0.01% |
6,603
+1,117
| +20% | +$52.6K |
|
534
Genworth Financial
GNW
$3.51B
| $307K | ﹤0.01% |
69,783
-30,060
| -30% | -$132K |
|
535
Olin
OLN
$2.92B
| $307K | ﹤0.01% |
16,403
+11,872
| +262% | +$222K |
|
536
Harley-Davidson
HOG
$3.65B
| $306K | ﹤0.01% |
+8,511
| New | +$306K |
|
537
Fastly
FSLY
$1.08B
| $302K | ﹤0.01% |
12,596
-1,551
| -11% | -$37.2K |
|
538
International Paper
IP
$24.5B
| $301K | ﹤0.01% |
+7,621
| New | +$301K |
|
539
Smith Micro Software
SMSI
$15.3M
| $299K | ﹤0.01% |
+6,899
| New | +$299K |
|
|
POLY
540
DELISTED
Plantronics, Inc.
POLY
| $294K | ﹤0.01% |
+7,883
| New | +$294K |
|
541
Williams-Sonoma
WSM
$24.7B
| $293K | ﹤0.01% |
+8,632
| New | +$293K |
|
|
ATRS
542
DELISTED
Antares Pharma, Inc.
ATRS
| $293K | ﹤0.01% |
87,859
-1,807
| -2% | -$6.03K |
|
|
CVA
543
DELISTED
Covanta Holding Corporation
CVA
| $293K | ﹤0.01% |
+16,981
| New | +$293K |
|
544
ProShares Ultra Bloomberg Natural Gas
BOIL
$128M
| $290K | ﹤0.01% |
+23
| New | +$290K |
|
545
VanEck Rare Earth/Strategic Metals ETF
REMX
$713M
| $288K | ﹤0.01% |
7,622
-9,517
| -56% | -$360K |
|
546
Boyd Gaming
BYD
$6.84B
| $287K | ﹤0.01% |
11,995
-5,483
| -31% | -$131K |
|
547
Chewy
CHWY
$14.5B
| $285K | ﹤0.01% |
11,620
+4,234
| +57% | +$104K |
|
548
Valmont Industries
VMI
$7.45B
| $282K | ﹤0.01% |
2,039
-2,126
| -51% | -$294K |
|
|
PRSP
549
DELISTED
Perspecta Inc. Common Stock
PRSP
| $280K | ﹤0.01% |
10,735
+8,741
| +438% | +$228K |
|
550
United States Brent Oil Fund
BNO
$103M
| $276K | ﹤0.01% |
15,246
+7,044
| +86% | +$128K |
|