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 | |
|---|---|---|---|---|---|---|
3776
CALL
American Eagle Outfitters
AEO
$2.97B
| $12K | ﹤0.01% |
220
-43
| -16% | -$639 |
|
|
ASRT
3777
CALL
DELISTED
Assertio
ASRT
| $12K | ﹤0.01% |
10
-17
| -63% | -$17.2K |
|
3778
CALL
Autohome
ATHM
$2.63B
| $12K | ﹤0.01% |
231
+118
| +104% | +$3.77K |
|
3779
CALL
B2Gold
BTG
$5.06B
| $12K | ﹤0.01% |
245
-222
| -48% | -$668 |
|
3780
Babcock & Wilcox
BW
$1.22B
| $12K | ﹤0.01% |
136
+126
| +1,260% | +$17.7K |
|
3781
CALL
BorgWarner
BWA
$12.8B
| $12K | ﹤0.01% |
135
-157
| -54% | -$5.72K |
|
3782
PUT
Boyd Gaming
BYD
$6.73B
| $12K | ﹤0.01% |
272
+18
| +7% | +$366 |
|
|
BZUN
3783
CALL
Baozun
BZUN
$181M
| $12K | ﹤0.01% |
+230
| New | +$3.27K |
|
3784
PUT
Cardinal Health
CAH
$53.9B
| $12K | ﹤0.01% |
62
-77
| -55% | -$6.06K |
|
3785
PUT
Cato Corp
CATO
$66.5M
| $12K | ﹤0.01% |
+31
| New | +$772 |
|
3786
PUT
Chemours
CC
$2.5B
| $12K | ﹤0.01% |
296
+14
| +5% | +$421 |
|
3787
PUT
Century Communities
CCS
$2B
| $12K | ﹤0.01% |
+186
| New | +$4.3K |
|
3788
PUT
Costamare
CMRE
$1.86B
| $12K | ﹤0.01% |
420
+118
| +39% | +$717 |
|
3789
Covenant Logistics
CVLG
$1.05B
| $12K | ﹤0.01% |
+1,372
| New | +$13.5K |
|
3790
Douglas Emmett
DEI
$2.07B
| $12K | ﹤0.01% |
+320
| New | +$12.3K |
|
3791
CALL
Delek Logistics
DKL
$3.12B
| $12K | ﹤0.01% |
70
-194
| -73% | -$6.26K |
|
3792
PUT
Darden Restaurants
DRI
$24.2B
| $12K | ﹤0.01% |
235
+58
| +33% | +$4.34K |
|
3793
CALL
Geron
GERN
$924M
| $12K | ﹤0.01% |
661
+442
| +202% | +$942 |
|
3794
Gran Tierra Energy
GTE
$233M
| $12K | ﹤0.01% |
+478
| New | +$12.6K |
|
|
HDSN
3795
PUT
Hudson Technologies
HDSN
$252M
| $12K | ﹤0.01% |
105
-42
| -29% | -$306 |
|
3796
PUT
Huntington Ingalls Industries
HII
$11.2B
| $12K | ﹤0.01% |
54
-21
| -28% | -$4.27K |
|
3797
CALL
IMAX
IMAX
$2.62B
| $12K | ﹤0.01% |
107
-53
| -33% | -$1.73K |
|
3798
iShares Micro-Cap ETF
IWC
$1.44B
| $12K | ﹤0.01% |
151
-402
| -73% | -$34.2K |
|
|
MAG
3799
PUT
DELISTED
MAG Silver
MAG
| $12K | ﹤0.01% |
188
-13
| -6% | -$184 |
|
3800
CALL
Magnite
MGNI
$2.86B
| $12K | ﹤0.01% |
+901
| New | +$7.02K |
|
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.