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
| Rank | Stock | Value |
|---|---|---|
| 1 |
Goldman Sachs
GS
|
+$40.4M |
| 2 |
NVIDIA
NVDA
|
+$23.1M |
| 3 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$21.5M |
| 4 |
Wells Fargo
WFC
|
+$20.8M |
| 5 |
Micron Technology
MU
|
+$20M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Citigroup
C
|
+$21.4M |
| 2 |
Apple
AAPL
|
+$15.7M |
| 3 |
Invesco QQQ Trust
QQQ
|
+$14.4M |
| 4 |
Eli Lilly
LLY
|
+$10.5M |
| 5 |
iShares Biotechnology ETF
IBB
|
+$8.06M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 9.73% |
| 2 | Communication Services | 9.25% |
| 3 | Consumer Discretionary | 8.76% |
| 4 | Healthcare | 8.53% |
| 5 | Financials | 7.38% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
APC
76
DELISTED
Anadarko Petroleum
APC
| $5.22M | 0.23% |
84,199
+63,289
| +303% | +$4.21M |
|
77
Northrop Grumman
NOC
$74.4B
| $5.22M | 0.23% |
21,936
+7,958
| +57% | +$1.89M |
|
78
Eaton
ETN
$156B
| $5.21M | 0.23% |
70,319
+38,964
| +124% | +$2.77M |
|
79
CALL
Chipotle Mexican Grill
CMG
$42.5B
| $5.13M | 0.22% |
245,250
+47,200
| +24% | +$390K |
|
|
PXD
80
DELISTED
Pioneer Natural Resource Co.
PXD
| $5.07M | 0.22% |
+27,233
| New | +$5.05M |
|
81
lululemon athletica
LULU
$13.2B
| $5.02M | 0.22% |
96,867
+42,605
| +79% | +$2.8M |
|
82
Qualcomm
QCOM
$183B
| $4.93M | 0.21% |
+85,949
| New | +$4.99M |
|
83
PUT
VanEck Gold Miners ETF
GDX
$22.7B
| $4.93M | 0.21% |
28,008
+7,702
| +38% | +$179K |
|
84
NetEase
NTES
$82.9B
| $4.92M | 0.21% |
86,545
-3,875
| -4% | -$209K |
|
85
Blackstone
BX
$151B
| $4.87M | 0.21% |
164,086
+79,565
| +94% | +$2.39M |
|
86
General Motors
GM
$71.7B
| $4.85M | 0.21% |
137,192
-152,541
| -53% | -$5.58M |
|
87
AB InBev
BUD
$156B
| $4.82M | 0.21% |
43,942
+5,857
| +15% | +$630K |
|
88
Costco
COST
$412B
| $4.78M | 0.21% |
28,528
-23,449
| -45% | -$3.93M |
|
89
PUT
Amazon
AMZN
$2.66T
| $4.7M | 0.2% |
98,280
-27,480
| -22% | -$1.15M |
|
90
T-Mobile US
TMUS
$206B
| $4.68M | 0.2% |
72,536
+31,492
| +77% | +$1.94M |
|
91
VanEck Oil Services ETF
OIH
$2.01B
| $4.67M | 0.2% |
7,572
+5,639
| +292% | +$3.67M |
|
92
RTX Corp
RTX
$262B
| $4.64M | 0.2% |
65,669
+53,011
| +419% | +$3.72M |
|
93
Bath & Body Works
BBWI
$4.13B
| $4.61M | 0.2% |
+121,036
| New | +$5.46M |
|
|
AET
94
DELISTED
Aetna Inc
AET
| $4.58M | 0.2% |
35,925
+13,252
| +58% | +$1.66M |
|
95
PUT
Tesla
TSLA
$1.42T
| $4.56M | 0.2% |
115,515
-50,250
| -30% | -$850K |
|
96
Nike
NKE
$63.7B
| $4.56M | 0.2% |
81,770
+70,369
| +617% | +$3.89M |
|
97
PUT
State Street Materials Select Sector SPDR ETF
XLB
$8.31B
| $4.54M | 0.2% |
70,480
+7,796
| +12% | +$202K |
|
|
98
Citigroup
C
$216B
| $4.48M | 0.19% |
74,835
-361,371
| -83% | -$21.4M |
|
99
FedEx
FDX
$73.1B
| $4.44M | 0.19% |
22,755
+20,944
| +1,156% | +$4M |
|
|
100
CALL
Invesco QQQ Trust
QQQ
$471B
| $4.4M | 0.19% |
10,025
-1,717
| -15% | -$219K |
|
Similar funds
Simplex Trading's Q1 2017 Portfolio in Review
As of Q1 2017, Simplex Trading held 7,485 positions worth $2.31B, up 38% from $1.67B the previous quarter. Its ten largest holdings account for 18% of the portfolio.
Simplex Trading deployed $551M of net new capital in Q1 2017, opening 1,662 new positions and adding to 2,374 existing holdings. Its largest new stake was iShares 20+ Year Treasury Bond ETF: 179,511 shares worth $21.7M.
By sector, the portfolio is most concentrated in Technology at 9.7% of assets, up from 7.2% a quarter earlier, followed by Communication Services and Consumer Discretionary.
On the sell side, the largest reduction was Citigroup, an estimated $21.4M trimmed.
- Simplex Trading's largest Q1 2017 buy was iShares 20+ Year Treasury Bond ETF: 179,511 shares worth $21.7M.
- Simplex Trading added most to Goldman Sachs in Q1 2017, an estimated $40.4M increase.
- Simplex Trading's biggest Q1 2017 reduction was Citigroup, cutting an estimated $21.4M.
- Simplex Trading fully exited Invesco QQQ Trust in Q1 2017, selling an estimated $14.4M.
- Simplex Trading's ten largest holdings make up 18% of its $2.31B portfolio in Q1 2017.
- Simplex Trading opened 1,662 new positions and closed 1,369 in Q1 2017.
- Simplex Trading's portfolio value rose 38% quarter-over-quarter to $2.31B.
Based on Simplex Trading's 13F filing for Q1 2017, filed 21 Apr 2017.