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
|
+$84.3M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$37M |
| 3 |
Amgen
AMGN
|
+$32.3M |
| 4 |
Micron Technology
MU
|
+$29.4M |
| 5 |
Qualcomm
QCOM
|
+$18M |
Top Sells
| 1 |
SPDR S&P 500 ETF Trust
SPY
|
+$29.8M |
| 2 |
Gilead Sciences
GILD
|
+$29.3M |
| 3 |
Goldman Sachs
GS
|
+$27.7M |
| 4 |
Booking.com
BKNG
|
+$26M |
| 5 |
AT&T
T
|
+$20.8M |
Sector Composition
| 1 | Technology | 20.65% |
| 2 | Communication Services | 17.64% |
| 3 | Consumer Discretionary | 14.77% |
| 4 | Healthcare | 11.1% |
| 5 | Financials | 6.35% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
976
Graphic Packaging
GPK
$6.24B
| $72K | ﹤0.01% |
5,229
-20,016
| -79% | -$276K |
|
977
EchoStar
SATS
$22.2B
| $72K | ﹤0.01% |
+1,472
| New | +$72K |
|
978
Veracyte
VCYT
$2.51B
| $72K | ﹤0.01% |
8,740
+419
| +5% | +$3.45K |
|
|
SYNT
979
DELISTED
Syntel Inc
SYNT
| $72K | ﹤0.01% |
4,304
+1,133
| +36% | +$19K |
|
|
MON
980
DELISTED
Monsanto Co
MON
| $72K | ﹤0.01% |
613
-72,892
| -99% | -$8.56M |
|
|
SSRI
981
DELISTED
Silver Standard Resources
SSRI
| $72K | ﹤0.01% |
+7,479
| New | +$72K |
|
982
America Movil
AMX
$61B
| $71K | ﹤0.01% |
4,476
+1,357
| +44% | +$21.5K |
|
983
Walker & Dunlop
WD
$2.97B
| $71K | ﹤0.01% |
+1,467
| New | +$71K |
|
984
MarineMax
HZO
$573M
| $70K | ﹤0.01% |
+3,616
| New | +$70K |
|
985
Icahn Enterprises
IEP
$4.79B
| $70K | ﹤0.01% |
+1,218
| New | +$70K |
|
|
AERI
986
DELISTED
Aerie Pharmaceuticals, Inc.
AERI
| $70K | ﹤0.01% |
1,341
-7,125
| -84% | -$372K |
|
|
TCO
987
DELISTED
Taubman Centers Inc.
TCO
| $70K | ﹤0.01% |
1,178
-1,273
| -52% | -$75.6K |
|
|
BUFF
988
DELISTED
Blue Buffalo Pet Products, Inc
BUFF
| $70K | ﹤0.01% |
+3,070
| New | +$70K |
|
|
CLDT
989
Chatham Lodging
CLDT
$354M
| $69K | ﹤0.01% |
+3,439
| New | +$69K |
|
990
Energy Recovery
ERII
$773M
| $69K | ﹤0.01% |
+8,432
| New | +$69K |
|
991
Hyster-Yale Materials Handling
HY
$655M
| $69K | ﹤0.01% |
+991
| New | +$69K |
|
992
iShares MSCI EAFE Small-Cap ETF
SCZ
$10.9B
| $69K | ﹤0.01% |
+1,202
| New | +$69K |
|
|
RP
993
DELISTED
RealPage, Inc.
RP
| $69K | ﹤0.01% |
1,942
+1,722
| +783% | +$61.2K |
|
|
DNR
994
DELISTED
Denbury Resources, Inc.
DNR
| $69K | ﹤0.01% |
45,182
-60,114
| -57% | -$91.8K |
|
995
United States Brent Oil Fund
BNO
$101M
| $68K | ﹤0.01% |
5,307
+4,702
| +777% | +$60.2K |
|
996
iShares Russell Mid-Cap Value ETF
IWS
$14.3B
| $68K | ﹤0.01% |
819
-7,696
| -90% | -$639K |
|
997
Opko Health
OPK
$1.14B
| $68K | ﹤0.01% |
10,422
+9,268
| +803% | +$60.5K |
|
998
ProShares UltraShort Financials
SKF
$9.89M
| $68K | ﹤0.01% |
162
+160
| +8,000% | +$67.2K |
|
|
NSH
999
DELISTED
NuStar GP Holdings LLC
NSH
| $68K | ﹤0.01% |
+2,792
| New | +$68K |
|
1000
American Eagle Outfitters
AEO
$3.4B
| $67K | ﹤0.01% |
5,615
-3,539
| -39% | -$42.2K |
|