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 | |
|---|---|---|---|---|---|---|
|
26
Goldman Sachs
GS
$221B
| $9.42M | 0.41% |
42,431
-125,017
| -75% | -$27.7M |
|
27
T-Mobile US
TMUS
$284B
| $9.25M | 0.4% |
152,605
+80,069
| +110% | +$4.85M |
|
28
Intel
INTC
$105B
| $8.74M | 0.38% |
258,986
+54,209
| +26% | +$1.83M |
|
29
iShares 20+ Year Treasury Bond ETF
TLT
$47.8B
| $8.73M | 0.38% |
69,753
-109,758
| -61% | -$13.7M |
|
30
General Mills
GIS
$26.6B
| $8.18M | 0.36% |
+147,659
| New | +$8.18M |
|
31
Direxion Daily Small Cap Bull 3x Shares
TNA
$2.13B
| $8.08M | 0.35% |
144,885
+33,192
| +30% | -$4.38M |
|
32
Lockheed Martin
LMT
$105B
| $7.62M | 0.33% |
+27,444
| New | +$7.62M |
|
33
General Motors
GM
$55B
| $7.59M | 0.33% |
217,357
+80,165
| +58% | +$2.8M |
|
34
Citigroup
C
$175B
| $7.48M | 0.33% |
111,875
+37,040
| +49% | +$2.48M |
|
35
AbbVie
ABBV
$374B
| $7.22M | 0.31% |
99,626
-150,208
| -60% | -$10.9M |
|
36
Costco
COST
$421B
| $7.2M | 0.31% |
44,997
+16,469
| +58% | +$2.63M |
|
37
Advanced Micro Devices
AMD
$263B
| $6.45M | 0.28% |
+516,737
| New | +$6.45M |
|
38
Utilities Select Sector SPDR Fund
XLU
$20.8B
| $6.12M | 0.27% |
+117,709
| New | +$6.12M |
|
|
AGN
39
DELISTED
Allergan plc
AGN
| $5.83M | 0.25% |
23,991
+19,876
| +483% | +$4.83M |
|
40
AstraZeneca
AZN
$255B
| $5.8M | 0.25% |
170,082
+128,712
| +311% | +$4.39M |
|
|
41
Booking.com
BKNG
$181B
| $5.69M | 0.25% |
3,040
-13,880
| -82% | -$26M |
|
42
SPDR Dow Jones Industrial Average ETF Trust
DIA
$39.7B
| $5.67M | 0.25% |
+26,597
| New | +$5.67M |
|
43
GE Aerospace
GE
$293B
| $5.61M | 0.24% |
207,678
+119,386
| +135% | +$3.22M |
|
44
Pfizer
PFE
$141B
| $5.33M | 0.23% |
158,614
+97,139
| +158% | +$3.26M |
|
45
ConocoPhillips
COP
$118B
| $5.32M | 0.23% |
120,969
+99,656
| +468% | +$4.38M |
|
46
Starbucks
SBUX
$99.2B
| $5.2M | 0.23% |
89,259
-181,177
| -67% | -$10.6M |
|
47
MetLife
MET
$53.6B
| $5.06M | 0.22% |
+92,049
| New | +$5.06M |
|
48
Yum! Brands
YUM
$40.1B
| $4.77M | 0.21% |
64,635
+48,012
| +289% | +$3.54M |
|
49
CVS Health
CVS
$93B
| $4.76M | 0.21% |
59,188
-176,130
| -75% | -$14.2M |
|
50
Wells Fargo
WFC
$258B
| $4.68M | 0.2% |
84,393
-281,399
| -77% | -$15.6M |
|