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 | |
|---|---|---|---|---|---|---|
|
176
PUT
Invesco QQQ Trust
QQQ
$471B
| $2.4M | 0.1% |
19,734
+5,382
| +38% | +$687K |
|
177
CALL
Wynn Resorts
WYNN
$9.82B
| $2.39M | 0.1% |
2,390
-546
| -19% | -$54.5K |
|
178
Marathon Petroleum
MPC
$93.3B
| $2.38M | 0.1% |
47,059
+39,963
| +563% | +$1.99M |
|
179
Ulta Beauty
ULTA
$21B
| $2.38M | 0.1% |
+8,331
| New | +$2.28M |
|
|
PRXL
180
DELISTED
Parexel International Corp
PRXL
| $2.35M | 0.1% |
+37,177
| New | +$2.46M |
|
181
Gartner
IT
$9.02B
| $2.32M | 0.1% |
+21,452
| New | +$2.21M |
|
182
CarMax
KMX
$8.18B
| $2.3M | 0.1% |
38,870
+12,445
| +47% | +$809K |
|
183
CALL
VanEck Gold Miners ETF
GDX
$22.7B
| $2.29M | 0.1% |
17,957
-8,878
| -33% | -$207K |
|
184
SAP
SAP
$180B
| $2.28M | 0.1% |
+23,274
| New | +$2.16M |
|
185
American Airlines Group
AAL
$10.1B
| $2.28M | 0.1% |
53,964
+48,098
| +820% | +$2.18M |
|
|
AGN
186
CALL
DELISTED
Allergan plc
AGN
| $2.24M | 0.1% |
3,209
-919
| -22% | -$214K |
|
|
SUM
187
DELISTED
Summit Materials, Inc. Class A Common Stock
SUM
| $2.21M | 0.1% |
+92,472
| New | +$2.17M |
|
188
WisdomTree Europe Hedged Equity Fund
HEDJ
$1.83B
| $2.18M | 0.09% |
69,456
+1,678
| +2% | +$49.9K |
|
189
ProShares Ultra VIX Short-Term Futures ETF
UVXY
$233M
| $2.18M | 0.09% |
+3
| New | +$3.44M |
|
190
Occidental Petroleum
OXY
$56.2B
| $2.17M | 0.09% |
+34,302
| New | +$2.28M |
|
|
ALXN
191
DELISTED
Alexion Pharmaceuticals
ALXN
| $2.17M | 0.09% |
17,928
+9,629
| +116% | +$1.24M |
|
192
CALL
SPDR Gold Trust
GLD
$132B
| $2.16M | 0.09% |
9,533
+2,116
| +29% | +$246K |
|
193
Mastercard
MA
$476B
| $2.16M | 0.09% |
19,177
-73,548
| -79% | -$8.06M |
|
|
MDP
194
DELISTED
Meredith Corporation
MDP
| $2.16M | 0.09% |
+33,378
| New | +$2.05M |
|
|
RHT
195
DELISTED
Red Hat Inc
RHT
| $2.15M | 0.09% |
+24,848
| New | +$1.97M |
|
196
HSBC
HSBC
$347B
| $2.15M | 0.09% |
58,247
+54,469
| +1,442% | +$2.05M |
|
197
CALL
JPMorgan Chase
JPM
$918B
| $2.14M | 0.09% |
7,031
-127
| -2% | -$11.2K |
|
198
Pfizer
PFE
$142B
| $2.1M | 0.09% |
+64,795
| New | +$2.04M |
|
|
RDS.A
199
DELISTED
Royal Dutch Shell PLC ADS Class A
RDS.A
| $2.1M | 0.09% |
39,798
-39,062
| -50% | -$2.09M |
|
200
NRG Energy
NRG
$27.8B
| $2.08M | 0.09% |
+111,156
| New | +$1.84M |
|
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.