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 |
Gilead Sciences
GILD
|
+$17.3M |
| 2 |
Apple
AAPL
|
+$15.2M |
| 3 |
Alphabet (Google) Class A
GOOGL
|
+$14.9M |
| 4 |
Booking.com
BKNG
|
+$14.7M |
| 5 |
Wells Fargo
WFC
|
+$12.9M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
SPDR Gold Trust
GLD
|
+$38.3M |
| 2 |
QIHU
QIHOO 360 TECHNOLOGY CO LTD ADS RPSTG 3 CL A SHS
QIHU
|
+$30.7M |
| 3 |
LNKD
LinkedIn Corporation
LNKD
|
+$15.2M |
| 4 |
CELG
Celgene Corp
CELG
|
+$12.6M |
| 5 |
ProShares Trust UltraShort Lehman 20+ Year Treasury
TBT
|
+$10.4M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Communication Services | 8.39% |
| 2 | Healthcare | 8.28% |
| 3 | Consumer Discretionary | 6.84% |
| 4 | Technology | 6.06% |
| 5 | Financials | 4.39% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
3776
CALL
AllianceBernstein
AB
$3.49B
| $8K | ﹤0.01% |
357
-80
| -18% | -$1.81K |
|
3777
CALL
Adtran
ADTN
$730M
| $8K | ﹤0.01% |
+77
| New | +$1.42K |
|
3778
PUT
Aegon
AEG
$13.6B
| $8K | ﹤0.01% |
47
| – | – |
|
|
AGEN
3779
PUT
Agenus
AGEN
$275M
| $8K | ﹤0.01% |
1
-1
| -50% | -$115 |
|
3780
CALL
AGNC Investment
AGNC
$12.9B
| $8K | ﹤0.01% |
122
-19
| -13% | -$372 |
|
|
3781
PUT
AGNC Investment
AGNC
$12.9B
| $8K | ﹤0.01% |
608
+288
| +90% | +$5.64K |
|
3782
CALL
Amkor Technology
AMKR
$11.3B
| $8K | ﹤0.01% |
74
-45
| -38% | -$360 |
|
3783
American Superconductor
AMSC
$1.39B
| $8K | ﹤0.01% |
+1,188
| New | +$9.21K |
|
3784
CALL
Abercrombie & Fitch
ANF
$4.58B
| $8K | ﹤0.01% |
512
+80
| +19% | +$1.54K |
|
3785
CALL
Astec Industries
ASTE
$1.26B
| $8K | ﹤0.01% |
26
+12
| +86% | +$697 |
|
3786
CALL
Avnet
AVT
$7.07B
| $8K | ﹤0.01% |
14
-36
| -72% | -$1.47K |
|
3787
CALL
Brunswick
BC
$5.33B
| $8K | ﹤0.01% |
41
+28
| +215% | +$1.34K |
|
3788
PUT
Franklin Resources
BEN
$17.3B
| $8K | ﹤0.01% |
586
+52
| +10% | +$1.84K |
|
3789
CALL
Bunge Global
BG
$22.8B
| $8K | ﹤0.01% |
150
-132
| -47% | -$8.21K |
|
3790
PUT
Boyd Gaming
BYD
$6.78B
| $8K | ﹤0.01% |
151
+101
| +202% | +$1.94K |
|
3791
PUT
Conagra Brands
CAG
$7.38B
| $8K | ﹤0.01% |
263
+69
| +36% | +$2.48K |
|
3792
PUT
Churchill Downs
CHDN
$6.22B
| $8K | ﹤0.01% |
+456
| New | +$10.7K |
|
3793
CALL
Columbia Sportswear
COLM
$3.3B
| $8K | ﹤0.01% |
24
-11
| -31% | -$628 |
|
3794
Crocs
CROX
$6.75B
| $8K | ﹤0.01% |
+1,040
| New | +$9.96K |
|
|
CSR
3795
Centerspace
CSR
$941M
| $8K | ﹤0.01% |
+137
| New | +$8.73K |
|
3796
PUT
Delek US
DK
$3.85B
| $8K | ﹤0.01% |
91
-98
| -52% | -$1.5K |
|
|
DRD
3797
DRDGold
DRD
$1.79B
| $8K | ﹤0.01% |
+1,653
| New | +$11.3K |
|
3798
PUT
DXP Enterprises
DXPE
$2.49B
| $8K | ﹤0.01% |
+37
| New | +$853 |
|
3799
Encore Capital Group
ECPG
$2.06B
| $8K | ﹤0.01% |
385
-3,323
| -90% | -$74.9K |
|
3800
eGain
EGAN
$190M
| $8K | ﹤0.01% |
+2,646
| New | +$7.48K |
|
Similar funds
Simplex Trading's Q3 2016 Portfolio in Review
As of Q3 2016, Simplex Trading held 7,235 positions worth $1.48B, down 1.4% from $1.5B the previous quarter. Its ten largest holdings account for 18% of the portfolio.
Simplex Trading withdrew a net $87.1M in Q3 2016, closing 1,479 positions and reducing 1,939 holdings. Its most notable exit was SPDR Gold Trust, an estimated $38.3M position sold in full.
By sector, the portfolio is most concentrated in Communication Services at 8.4% of assets, up from 6.6% a quarter earlier, followed by Healthcare and Consumer Discretionary.
Against the trend, Simplex Trading opened a new position in Booking.com worth $15.6M.
- Simplex Trading's largest Q3 2016 buy was Booking.com: 264,225 shares worth $15.6M.
- Simplex Trading added most to Gilead Sciences in Q3 2016, an estimated $17.3M increase.
- Simplex Trading's biggest Q3 2016 reduction was LinkedIn Corporation, cutting an estimated $15.2M.
- Simplex Trading fully exited SPDR Gold Trust in Q3 2016, selling an estimated $38.3M.
- Simplex Trading's ten largest holdings make up 18% of its $1.48B portfolio in Q3 2016.
- Simplex Trading opened 1,460 new positions and closed 1,479 in Q3 2016.
- Simplex Trading's portfolio value fell 1.4% quarter-over-quarter to $1.48B.
Based on Simplex Trading's 13F filing for Q3 2016, filed 7 Oct 2016.