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 |
iShares Russell 2000 ETF
IWM
|
$27.5M |
| 2 |
SPDR Dow Jones Industrial Average ETF Trust
DIA
|
$16.3M |
| 3 |
Walt Disney
DIS
|
$13.9M |
| 4 |
iShares MSCI Emerging Markets ETF
EEM
|
$10.4M |
| 5 |
Gilead Sciences
GILD
|
$10.4M |
Top Sells
| 1 |
Alphabet (Google) Class C
GOOG
|
$95.3M |
| 2 |
Apple
AAPL
|
$21.1M |
| 3 |
Meta Platforms (Facebook)
META
|
$20M |
| 4 |
IBM
IBM
|
$13.4M |
| 5 |
Baidu
BIDU
|
$12.1M |
Sector Composition
| 1 | Healthcare | 13.63% |
| 2 | Communication Services | 9.81% |
| 3 | Consumer Discretionary | 9.7% |
| 4 | Technology | 9.67% |
| 5 | Financials | 9.48% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
51
F5
FFIV
$17.8B
| $2.4M | 0.18% |
20,693
+17,778
| +610% | +$2.06M |
|
|
HOT
52
DELISTED
STARWOOD HOTELS & RESORTS WORLDWIDE, INC.
HOT
| $2.27M | 0.17% |
34,144
+18,883
| +124% | +$1.25M |
|
53
Zoetis
ZTS
$67.6B
| $2.24M | 0.16% |
54,312
+26,509
| +95% | +$1.09M |
|
54
BP
BP
$88.8B
| $2.21M | 0.16% |
85,963
+22,906
| +36% | +$589K |
|
|
MNK
55
DELISTED
MALLINCKRODT PUBLIC LIMITED COMPANY
MNK
| $2.19M | 0.16% |
34,323
+23,306
| +212% | +$1.49M |
|
56
Visa
V
$681B
| $2.19M | 0.16% |
31,371
+569
| +2% | +$39.6K |
|
57
Wynn Resorts
WYNN
$13.1B
| $2.15M | 0.16% |
40,491
-53,969
| -57% | -$2.87M |
|
58
Skyworks Solutions
SWKS
$10.9B
| $2.14M | 0.16% |
25,436
+18,751
| +280% | +$1.58M |
|
|
PNRA
59
DELISTED
Panera Bread Co
PNRA
| $2.13M | 0.16% |
11,009
+8,788
| +396% | +$1.7M |
|
60
ProShares Trust UltraShort Lehman 20+ Year Treasury
TBT
$304M
| $2.12M | 0.16% |
+48,950
| New | +$2.12M |
|
61
SPDR Gold Trust
GLD
$111B
| $2.08M | 0.15% |
+19,434
| New | +$2.08M |
|
|
MNDT
62
DELISTED
Mandiant, Inc. Common Stock
MNDT
| $2.08M | 0.15% |
65,230
+4,505
| +7% | +$143K |
|
63
Viatris
VTRS
$12.3B
| $2.06M | 0.15% |
51,227
-15,515
| -23% | -$625K |
|
64
HP
HPQ
$26.8B
| $2.04M | 0.15% |
175,149
+156,905
| +860% | +$1.82M |
|
65
Autodesk
ADSK
$67.9B
| $2.03M | 0.15% |
+46,096
| New | +$2.03M |
|
66
Merck
MRK
$210B
| $1.99M | 0.15% |
+42,126
| New | +$1.99M |
|
|
QIHU
67
DELISTED
QIHOO 360 TECHNOLOGY CO LTD ADS RPSTG 3 CL A SHS
QIHU
| $1.97M | 0.14% |
41,213
-36,563
| -47% | -$1.75M |
|
|
TRAK
68
DELISTED
DEALERTRACK TECHNOLOGIES, INC. COM STK
TRAK
| $1.86M | 0.14% |
+29,426
| New | +$1.86M |
|
|
TWTR
69
DELISTED
Twitter, Inc.
TWTR
| $1.85M | 0.14% |
68,503
-190,555
| -74% | -$5.13M |
|
70
McKesson
MCK
$85.9B
| $1.83M | 0.13% |
+9,911
| New | +$1.83M |
|
71
Blackstone
BX
$131B
| $1.82M | 0.13% |
58,682
+29,188
| +99% | +$907K |
|
|
ISSI
72
DELISTED
INTEGRATED SILICON SOLUTN INC
ISSI
| $1.82M | 0.13% |
84,470
+38,283
| +83% | +$823K |
|
73
DuPont de Nemours
DD
$31.6B
| $1.77M | 0.13% |
+20,732
| New | +$1.77M |
|
74
Kroger
KR
$45.1B
| $1.76M | 0.13% |
48,824
+35,240
| +259% | +$1.27M |
|
75
GoPro
GPRO
$234M
| $1.73M | 0.13% |
55,523
-7,506
| -12% | -$234K |
|