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 |
iShares Russell 2000 ETF
IWM
|
+$58.5M |
| 2 |
Alphabet (Google) Class C
GOOG
|
+$56.5M |
| 3 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$44.1M |
| 4 |
Apple
AAPL
|
+$20.3M |
| 5 |
State Street SPDR S&P Oil & Gas Exploration & Production ETF
XOP
|
+$12.7M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Amazon
AMZN
|
+$109M |
| 2 |
Meta Platforms (Facebook)
META
|
+$62.3M |
| 3 |
Invesco QQQ Trust
QQQ
|
+$36.2M |
| 4 |
Goldman Sachs
GS
|
+$27.1M |
| 5 |
Boeing
BA
|
+$24.7M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Communication Services | 0.49% |
| 2 | Consumer Discretionary | 0.48% |
| 3 | Technology | 0.4% |
| 4 | Financials | 0.25% |
| 5 | Industrials | 0.22% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
COHR
1776
PUT
DELISTED
Coherent Inc
COHR
| $835K | ﹤0.01% |
79
-58
| -42% | -$7.45K |
|
1777
CALL
Cenovus Energy
CVE
$54.6B
| $834K | ﹤0.01% |
1,187
+342
| +40% | +$2.81K |
|
1778
CALL
PBF Energy
PBF
$7.29B
| $833K | ﹤0.01% |
255
+61
| +31% | +$2.46K |
|
1779
PUT
Travel + Leisure Co
TNL
$4.54B
| $833K | ﹤0.01% |
232
+64
| +38% | +$2.49K |
|
1780
CALL
Teradata
TDC
$2.68B
| $832K | ﹤0.01% |
217
+199
| +1,106% | +$7.28K |
|
1781
Brunswick
BC
$5.19B
| $831K | ﹤0.01% |
+17,895
| New | +$957K |
|
|
HIMX
1782
CALL
Himax Technologies
HIMX
$2.2B
| $831K | ﹤0.01% |
2,423
+284
| +13% | +$1.34K |
|
1783
CALL
Owens Corning
OC
$11.5B
| $831K | ﹤0.01% |
189
+47
| +33% | +$2.28K |
|
1784
Westlake Corp
WLK
$9.46B
| $831K | ﹤0.01% |
12,562
+7,658
| +156% | +$553K |
|
1785
PUT
Omega Healthcare
OHI
$15.4B
| $829K | ﹤0.01% |
236
-139
| -37% | -$4.82K |
|
|
ELLI
1786
PUT
DELISTED
Ellie Mae Inc
ELLI
| $829K | ﹤0.01% |
132
-282
| -68% | -$20.1K |
|
|
IDTI
1787
PUT
DELISTED
Integrated Device Technology I
IDTI
| $828K | ﹤0.01% |
171
+76
| +80% | +$3.59K |
|
1788
PUT
Cimpress
CMPR
$2.37B
| $827K | ﹤0.01% |
80
-51
| -39% | -$5.92K |
|
1789
PUT
VF Corp
VFC
$6.68B
| $827K | ﹤0.01% |
123
-393
| -76% | -$30.1K |
|
1790
Consolidated Edison
ED
$41.6B
| $825K | ﹤0.01% |
+10,796
| New | +$844K |
|
1791
PUT
Puma Biotechnology
PBYI
$406M
| $822K | ﹤0.01% |
404
+330
| +446% | +$9.9K |
|
|
SNV
1792
CALL
DELISTED
Synovus
SNV
| $822K | ﹤0.01% |
257
+175
| +213% | +$6.6K |
|
1793
CALL
Oshkosh
OSK
$9.67B
| $821K | ﹤0.01% |
134
-30
| -18% | -$1.92K |
|
|
MMP
1794
CALL
DELISTED
Magellan Midstream Partners, L.P.
MMP
| $821K | ﹤0.01% |
144
+69
| +92% | +$4.26K |
|
|
1795
Alphabet (Google) Class A
GOOGL
$3.91T
| $819K | ﹤0.01% |
15,680
-229,220
| -94% | -$12.4M |
|
1796
PUT
Annaly Capital Management
NLY
$16.9B
| $818K | ﹤0.01% |
209
-346
| -62% | -$13.8K |
|
|
CERN
1797
CALL
DELISTED
Cerner Corp
CERN
| $818K | ﹤0.01% |
156
-260
| -63% | -$15.1K |
|
1798
CALL
DTE Energy
DTE
$31.1B
| $816K | ﹤0.01% |
87
-29
| -25% | -$2.83K |
|
1799
Supernus Pharmaceuticals
SUPN
$2.68B
| $816K | ﹤0.01% |
24,583
+19,577
| +391% | +$842K |
|
|
KL
1800
CALL
DELISTED
Kirkland Lake Gold Ltd Ordinary
KL
| $816K | ﹤0.01% |
313
+290
| +1,261% | +$6.15K |
|
Similar funds
Simplex Trading's Q4 2018 Portfolio in Review
As of Q4 2018, Simplex Trading held 8,576 positions worth $34.1B, up 9.5% from $31.1B the previous quarter. Its ten largest holdings account for 43% of the portfolio.
Simplex Trading's Q4 2018 filing shows 1,199 new, 2,701 increased, 2,877 reduced and 1,573 closed positions. Its largest new stake was State Street SPDR S&P 500 ETF Trust: 163,699 shares worth $40.9M. The largest sale was Amazon, an estimated $109M.
By sector, the portfolio is most concentrated in Communication Services at 0.49% of assets, down from 0.89% a quarter earlier, followed by Consumer Discretionary and Technology.
- Simplex Trading's largest Q4 2018 buy was State Street SPDR S&P 500 ETF Trust: 163,699 shares worth $40.9M.
- Simplex Trading added most to iShares Russell 2000 ETF in Q4 2018, an estimated $58.5M increase.
- Simplex Trading's biggest Q4 2018 reduction was Amazon, cutting an estimated $109M.
- Simplex Trading fully exited Meta Platforms (Facebook) in Q4 2018, selling an estimated $62.3M.
- Simplex Trading's ten largest holdings make up 43% of its $34.1B portfolio in Q4 2018.
- Simplex Trading opened 1,199 new positions and closed 1,573 in Q4 2018.
- Simplex Trading's portfolio value rose 9.5% quarter-over-quarter to $34.1B.
Based on Simplex Trading's 13F filing for Q4 2018, filed 16 Jan 2019.