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 |
Alphabet (Google) Class C
GOOG
|
$54.6M |
| 2 |
iShares Russell 2000 ETF
IWM
|
$52.5M |
| 3 |
SPDR S&P 500 ETF Trust
SPY
|
$40.9M |
| 4 |
Apple
AAPL
|
$16.5M |
| 5 |
Visa
V
|
$12M |
Top Sells
| 1 |
Amazon
AMZN
|
$98.7M |
| 2 |
Meta Platforms (Facebook)
META
|
$70.7M |
| 3 |
Invesco QQQ Trust
QQQ
|
$33.4M |
| 4 |
Goldman Sachs
GS
|
$30.2M |
| 5 |
Boeing
BA
|
$26.5M |
Sector Composition
| 1 | Communication Services | 14.71% |
| 2 | Consumer Discretionary | 14.32% |
| 3 | Technology | 11.86% |
| 4 | Financials | 7.38% |
| 5 | Industrials | 6.44% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
26
Northrop Grumman
NOC
$82.8B
| $5.78M | 0.02% |
23,605
+932
| +4% | +$228K |
|
27
IBM
IBM
$231B
| $5.73M | 0.02% |
52,746
+22,568
| +75% | +$2.45M |
|
28
DuPont de Nemours
DD
$32B
| $5.49M | 0.02% |
50,849
+43,504
| +592% | +$4.69M |
|
29
Bristol-Myers Squibb
BMY
$95.3B
| $5.42M | 0.02% |
104,321
+41,956
| +67% | +$2.18M |
|
30
Materials Select Sector SPDR Fund
XLB
$5.46B
| $5.41M | 0.02% |
107,118
+84,098
| +365% | +$4.25M |
|
31
United States Oil Fund
USO
$960M
| $5.38M | 0.02% |
+69,554
| New | +$5.38M |
|
32
Baidu
BIDU
$33.6B
| $5.22M | 0.02% |
32,888
-68,828
| -68% | -$10.9M |
|
33
SPDR S&P MidCap 400 ETF Trust
MDY
$23.7B
| $5.2M | 0.02% |
17,165
+15,274
| +808% | +$4.62M |
|
34
Workday
WDAY
$61.6B
| $5.19M | 0.02% |
32,494
+15,532
| +92% | +$2.48M |
|
35
Micron Technology
MU
$136B
| $5.03M | 0.01% |
158,503
-121,938
| -43% | -$3.87M |
|
36
Kraft Heinz
KHC
$31.7B
| $5.03M | 0.01% |
116,786
+54,031
| +86% | +$2.33M |
|
37
Mastercard
MA
$537B
| $4.97M | 0.01% |
26,346
+5,676
| +27% | +$1.07M |
|
38
eBay
EBAY
$42.1B
| $4.87M | 0.01% |
+173,626
| New | +$4.87M |
|
39
Exxon Mobil
XOM
$480B
| $4.84M | 0.01% |
+70,952
| New | +$4.84M |
|
40
Citigroup
C
$177B
| $4.63M | 0.01% |
88,841
-254,375
| -74% | -$13.2M |
|
41
TransDigm Group
TDG
$71.9B
| $4.59M | 0.01% |
13,501
+4,333
| +47% | +$1.47M |
|
42
Direxion Daily Gold Miners Index Bull 2X Shares
NUGT
$801M
| $4.36M | 0.01% |
49,849
+49,409
| +11,229% | +$4.32M |
|
|
CELG
43
DELISTED
Celgene Corp
CELG
| $4.31M | 0.01% |
67,237
+57,070
| +561% | +$3.66M |
|
44
Nutanix
NTNX
$18.4B
| $4.3M | 0.01% |
103,413
-16,597
| -14% | -$690K |
|
|
CTXS
45
DELISTED
Citrix Systems Inc
CTXS
| $4.12M | 0.01% |
40,225
+12,915
| +47% | +$1.32M |
|
46
Oracle
ORCL
$624B
| $4.11M | 0.01% |
+90,999
| New | +$4.11M |
|
|
ATVI
47
DELISTED
Activision Blizzard Inc.
ATVI
| $3.9M | 0.01% |
+83,706
| New | +$3.9M |
|
48
JD.com
JD
$43.7B
| $3.71M | 0.01% |
177,053
-277,567
| -61% | -$5.81M |
|
49
Verizon
VZ
$186B
| $3.64M | 0.01% |
64,709
-27,393
| -30% | -$1.54M |
|
50
Old Dominion Freight Line
ODFL
$30.9B
| $3.57M | 0.01% |
86,781
+67,092
| +341% | +$2.76M |
|