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 |
NVIDIA
NVDA
|
+$29.6M |
| 2 |
State Street Industrial Select Sector SPDR ETF
XLI
|
+$22.6M |
| 3 |
iShares Russell 2000 ETF
IWM
|
+$17.9M |
| 4 |
Netflix
NFLX
|
+$17.1M |
| 5 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$13.4M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Invesco QQQ Trust
QQQ
|
+$123M |
| 2 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$40.6M |
| 3 |
Walt Disney
DIS
|
+$25.6M |
| 4 |
Alphabet (Google) Class A
GOOGL
|
+$13.5M |
| 5 |
Johnson & Johnson
JNJ
|
+$11.2M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.5% |
| 2 | Communication Services | 0.5% |
| 3 | Healthcare | 0.35% |
| 4 | Industrials | 0.3% |
| 5 | Consumer Discretionary | 0.26% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1026
PUT
Medifast
MED
$108M
| $2.9M | 0.01% |
226
+220
| +3,667% | +$30.6K |
|
|
PFPT
1027
CALL
DELISTED
Proofpoint, Inc.
PFPT
| $2.9M | 0.01% |
241
+199
| +474% | +$23.4K |
|
1028
PUT
First Trust Natural Gas ETF
FCG
$632M
| $2.9M | 0.01% |
206
-304
| -60% | -$4.8K |
|
|
CRC
1029
PUT
DELISTED
California Resources Corporation
CRC
| $2.9M | 0.01% |
1,472
+86
| +6% | +$1.83K |
|
|
EGRX
1030
CALL
DELISTED
Eagle Pharmaceuticals, Inc.
EGRX
| $2.9M | 0.01% |
520
+242
| +87% | +$12.6K |
|
1031
PUT
Franco-Nevada
FNV
$41.4B
| $2.89M | 0.01% |
341
+89
| +35% | +$6.72K |
|
1032
Energy Transfer Partners
ET
$70.1B
| $2.89M | 0.01% |
205,102
+77,829
| +61% | +$1.15M |
|
|
SNV
1033
PUT
DELISTED
Synovus
SNV
| $2.87M | 0.01% |
821
+773
| +1,610% | +$26.9K |
|
|
CADE
1034
PUT
DELISTED
Cadence Bancorporation
CADE
| $2.86M | 0.01% |
1,375
+535
| +64% | +$11K |
|
1035
CALL
Charles River Laboratories
CRL
$10.9B
| $2.85M | 0.01% |
201
+51
| +34% | +$6.92K |
|
1036
McKesson
MCK
$98.5B
| $2.85M | 0.01% |
21,196
-1,804
| -8% | -$225K |
|
1037
PUT
Under Armour Class C
UA
$2.92B
| $2.85M | 0.01% |
1,205
-825
| -41% | -$17.2K |
|
|
MASI
1038
PUT
DELISTED
Masimo
MASI
| $2.84M | 0.01% |
191
-290
| -60% | -$39.8K |
|
|
I
1039
PUT
DELISTED
INTELSAT S. A.
I
| $2.84M | 0.01% |
1,461
+239
| +20% | +$4.63K |
|
1040
CALL
Trip.com Group
TCOM
$27.5B
| $2.83M | 0.01% |
766
-638
| -45% | -$25.2K |
|
1041
PUT
Yelp
YELP
$1.38B
| $2.83M | 0.01% |
827
-512
| -38% | -$17.7K |
|
1042
PUT
IPG Photonics
IPGP
$3.89B
| $2.82M | 0.01% |
183
-77
| -30% | -$11.6K |
|
1043
PUT
Proshares UltraShort Technology
REW
$3.48M
| $2.82M | 0.01% |
+12
| New | +$14.5K |
|
1044
PUT
Omnicell
OMCL
$1.86B
| $2.82M | 0.01% |
+328
| New | +$26.7K |
|
1045
PUT
Globus Medical
GMED
$10.4B
| $2.82M | 0.01% |
666
+640
| +2,462% | +$27.8K |
|
1046
CALL
American Water Works
AWK
$26.3B
| $2.81M | 0.01% |
242
+145
| +149% | +$16K |
|
1047
CALL
Targa Resources
TRGP
$60.4B
| $2.81M | 0.01% |
715
+592
| +481% | +$23.5K |
|
|
AMED
1048
CALL
DELISTED
Amedisys
AMED
| $2.8M | 0.01% |
231
+163
| +240% | +$19.3K |
|
1049
PUT
Fortinet
FTNT
$112B
| $2.8M | 0.01% |
1,825
-1,275
| -41% | -$21K |
|
|
CZR
1050
CALL
DELISTED
Caesars Entertainment Corporation
CZR
| $2.8M | 0.01% |
2,373
-1,481
| -38% | -$14K |
|
Similar funds
Simplex Trading's Q2 2019 Portfolio in Review
As of Q2 2019, Simplex Trading held 8,406 positions worth $36.6B, up 1.9% from $36B the previous quarter. Its ten largest holdings account for 35% of the portfolio.
Simplex Trading's Q2 2019 filing shows 1,261 new, 2,604 increased, 3,015 reduced and 1,301 closed positions. Its largest new stake was iShares 20+ Year Treasury Bond ETF: 105,724 shares worth $14M. The largest sale was Invesco QQQ Trust, an estimated $123M.
By sector, the portfolio is most concentrated in Technology at 0.5% of assets, up from 0.42% a quarter earlier, followed by Communication Services and Healthcare.
- Simplex Trading's largest Q2 2019 buy was iShares 20+ Year Treasury Bond ETF: 105,724 shares worth $14M.
- Simplex Trading added most to NVIDIA in Q2 2019, an estimated $29.6M increase.
- Simplex Trading's biggest Q2 2019 reduction was State Street SPDR S&P 500 ETF Trust, cutting an estimated $40.6M.
- Simplex Trading fully exited Invesco QQQ Trust in Q2 2019, selling an estimated $123M.
- Simplex Trading's ten largest holdings make up 35% of its $36.6B portfolio in Q2 2019.
- Simplex Trading opened 1,261 new positions and closed 1,301 in Q2 2019.
- Simplex Trading's portfolio value rose 1.9% quarter-over-quarter to $36.6B.
Based on Simplex Trading's 13F filing for Q2 2019, filed 26 Jul 2019.