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 |
Tesla
TSLA
|
+$33.5M |
| 2 |
Netflix
NFLX
|
+$22.8M |
| 3 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$20.9M |
| 4 |
TWX
Time Warner Inc
TWX
|
+$18.3M |
| 5 |
Alibaba
BABA
|
+$15.2M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Amazon
AMZN
|
+$71.1M |
| 2 |
Micron Technology
MU
|
+$43.8M |
| 3 |
Alphabet (Google) Class C
GOOG
|
+$26.3M |
| 4 |
Booking.com
BKNG
|
+$22.2M |
| 5 |
Boeing
BA
|
+$21.6M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Consumer Discretionary | 7.87% |
| 2 | Communication Services | 7.14% |
| 3 | Technology | 6.23% |
| 4 | Financials | 5.5% |
| 5 | Healthcare | 5.2% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
BBBY
1826
CALL
Bed Bath & Beyond
BBBY
$473M
| $97K | ﹤0.01% |
1,323
+437
| +49% | +$20.5K |
|
1827
PUT
Caesarstone
CSTE
$72.3M
| $97K | ﹤0.01% |
265
+134
| +102% | +$2.89K |
|
1828
EnerSys
ENS
$6.95B
| $97K | ﹤0.01% |
+1,399
| New | +$99.5K |
|
1829
FS KKR Capital
FSK
$2.98B
| $97K | ﹤0.01% |
+3,354
| New | +$99.8K |
|
1830
CALL
Huazhu Hotels Group
HTHT
$12.4B
| $97K | ﹤0.01% |
460
-16
| -3% | -$585 |
|
1831
CALL
Markel Group
MKL
$25B
| $97K | ﹤0.01% |
+6
| New | +$6.75K |
|
1832
CALL
Simon Property Group
SPG
$74.5B
| $97K | ﹤0.01% |
268
-288
| -52% | -$45.8K |
|
1833
CALL
TSMC
TSM
$2.09T
| $97K | ﹤0.01% |
322
+224
| +229% | +$9.76K |
|
|
ACC
1834
DELISTED
American Campus Communities, Inc.
ACC
| $97K | ﹤0.01% |
2,537
+1,830
| +259% | +$69K |
|
|
TIVO
1835
DELISTED
Tivo Inc
TIVO
| $97K | ﹤0.01% |
7,193
+870
| +14% | +$12.4K |
|
1836
PUT
Acacia Research
ACTG
$450M
| $96K | ﹤0.01% |
1,166
+501
| +75% | +$1.84K |
|
1837
PUT
Copa Holdings
CPA
$5.56B
| $96K | ﹤0.01% |
278
-37
| -12% | -$4.96K |
|
1838
Criteo
CRTO
$1.03B
| $96K | ﹤0.01% |
+3,726
| New | +$101K |
|
1839
PUT
Herbalife
HLF
$1.23B
| $96K | ﹤0.01% |
2,284
-2,158
| -49% | -$91.6K |
|
1840
Neurogene
NGNE
$696M
| $96K | ﹤0.01% |
343
+278
| +428% | +$76.8K |
|
|
YRD
1841
CALL
Yiren Digital
YRD
$103M
| $96K | ﹤0.01% |
2,210
+2,088
| +1,711% | +$84.2K |
|
|
AERI
1842
DELISTED
Aerie Pharmaceuticals
AERI
| $96K | ﹤0.01% |
+1,772
| New | +$99.1K |
|
|
LXFT
1843
DELISTED
Luxoft Holding, Inc.
LXFT
| $96K | ﹤0.01% |
2,364
-5,350
| -69% | -$265K |
|
1844
PUT
Becton Dickinson
BDX
$43.1B
| $95K | ﹤0.01% |
481
-252
| -34% | -$55.2K |
|
1845
CALL
HubSpot
HUBS
$10.5B
| $95K | ﹤0.01% |
226
+24
| +12% | +$2.5K |
|
1846
PUT
Jacobs Solutions
J
$15.9B
| $95K | ﹤0.01% |
617
+581
| +1,614% | +$30.8K |
|
1847
Raymond James Financial
RJF
$32.5B
| $95K | ﹤0.01% |
+1,610
| New | +$100K |
|
1848
PUT
State Street SPDR Portfolio Europe ETF
SPEU
$712M
| $95K | ﹤0.01% |
757
-376
| -33% | -$13.5K |
|
|
AST
1849
PUT
DELISTED
Asterias Biotherapeutics Inc. Series A
AST
| $95K | ﹤0.01% |
288
+2
| +0.7% | +$4 |
|
1850
PUT
HCA Healthcare
HCA
$84.8B
| $94K | ﹤0.01% |
243
-351
| -59% | -$34.1K |
|
Similar funds
Simplex Trading's Q1 2018 Portfolio in Review
As of Q1 2018, Simplex Trading held 7,591 positions worth $2.27B, down 2.1% from $2.32B the previous quarter. Its ten largest holdings account for 18% of the portfolio.
Simplex Trading withdrew a net $210M in Q1 2018, closing 1,502 positions and reducing 2,267 holdings. Its most notable exit was Alphabet (Google) Class C, an estimated $26.3M position sold in full.
By sector, the portfolio is most concentrated in Consumer Discretionary at 7.9% of assets, down from 11% a quarter earlier, followed by Communication Services and Technology.
Against the trend, Simplex Trading opened a new position in Tesla worth $27.1M.
- Simplex Trading's largest Q1 2018 buy was Tesla: 1,525,035 shares worth $27.1M.
- Simplex Trading added most to Netflix in Q1 2018, an estimated $22.8M increase.
- Simplex Trading's biggest Q1 2018 reduction was Amazon, cutting an estimated $71.1M.
- Simplex Trading fully exited Alphabet (Google) Class C in Q1 2018, selling an estimated $26.3M.
- Simplex Trading's ten largest holdings make up 18% of its $2.27B portfolio in Q1 2018.
- Simplex Trading opened 1,643 new positions and closed 1,502 in Q1 2018.
- Simplex Trading's portfolio value fell 2.1% quarter-over-quarter to $2.27B.
Based on Simplex Trading's 13F filing for Q1 2018, filed 26 Apr 2018.