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 | |
|---|---|---|---|---|---|---|
226
PUT
Alibaba
BABA
$279B
| $1.75M | 0.08% |
8,122
+58
| +0.7% | +$5.9K |
|
227
Dolby
DLB
$4.63B
| $1.75M | 0.08% |
33,372
+30,712
| +1,155% | +$1.52M |
|
228
Trip.com Group
TCOM
$27B
| $1.75M | 0.08% |
35,600
-42,094
| -54% | -$1.93M |
|
229
CALL
Vertex Pharmaceuticals
VRTX
$120B
| $1.73M | 0.08% |
952
+204
| +27% | +$18K |
|
230
HDFC Bank
HDB
$119B
| $1.73M | 0.07% |
92,052
-8,256
| -8% | -$144K |
|
|
HBI
231
DELISTED
Hanesbrands
HBI
| $1.73M | 0.07% |
+83,322
| New | +$1.77M |
|
232
CALL
American Airlines Group
AAL
$10.1B
| $1.73M | 0.07% |
7,159
+521
| +8% | +$23.6K |
|
233
Cisco
CSCO
$445B
| $1.72M | 0.07% |
51,035
+2,599
| +5% | +$84.3K |
|
234
Global Payments
GPN
$21.7B
| $1.72M | 0.07% |
21,368
+21,211
| +13,510% | +$1.66M |
|
235
ProShares UltraPro S&P 500
UPRO
$5.33B
| $1.72M | 0.07% |
107,478
-108,582
| -50% | -$1.66M |
|
236
PayPal
PYPL
$49B
| $1.72M | 0.07% |
39,949
+1,253
| +3% | +$52.4K |
|
237
Range Resources
RRC
$8.99B
| $1.71M | 0.07% |
+58,709
| New | +$1.81M |
|
|
RSX
238
DELISTED
VanEck Russia ETF
RSX
| $1.71M | 0.07% |
+82,493
| New | +$1.74M |
|
239
Freeport-McMoran
FCX
$93.4B
| $1.68M | 0.07% |
+126,084
| New | +$1.81M |
|
240
CALL
IBM
IBM
$197B
| $1.68M | 0.07% |
5,891
+2,768
| +89% | +$464K |
|
241
Alnylam Pharmaceuticals
ALNY
$35.4B
| $1.68M | 0.07% |
32,718
+24,987
| +323% | +$1.15M |
|
242
Carnival Corporation Ltd
CCL
$36B
| $1.67M | 0.07% |
+28,291
| New | +$1.58M |
|
243
Lennar Class A
LEN
$19.7B
| $1.65M | 0.07% |
+33,840
| New | +$1.53M |
|
|
244
CALL
Wells Fargo
WFC
$263B
| $1.65M | 0.07% |
4,657
-5,031
| -52% | -$285K |
|
245
PUT
Caterpillar
CAT
$415B
| $1.64M | 0.07% |
4,244
+247
| +6% | +$23.4K |
|
|
246
CALL
Goldman Sachs
GS
$324B
| $1.63M | 0.07% |
3,259
-1,110
| -25% | -$268K |
|
247
Sensata Technologies
ST
$6.79B
| $1.63M | 0.07% |
37,278
+31,862
| +588% | +$1.34M |
|
248
Chefs' Warehouse
CHEF
$3.91B
| $1.61M | 0.07% |
116,034
+111,023
| +2,216% | +$1.69M |
|
|
PF
249
DELISTED
Pinnacle Foods, Inc.
PF
| $1.61M | 0.07% |
27,769
+20,689
| +292% | +$1.15M |
|
|
IPHI
250
DELISTED
INPHI CORPORATION
IPHI
| $1.6M | 0.07% |
+32,895
| New | +$1.54M |
|
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.