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 |
Apple
AAPL
|
+$34.5M |
| 2 |
Micron Technology
MU
|
+$33.9M |
| 3 |
Berkshire Hathaway Class B
BRK.B
|
+$30.8M |
| 4 |
NVIDIA
NVDA
|
+$23.5M |
| 5 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$22.2M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
TWX
Time Warner Inc
TWX
|
+$34.8M |
| 2 |
Amazon
AMZN
|
+$31.2M |
| 3 |
Tesla
TSLA
|
+$17.6M |
| 4 |
Netflix
NFLX
|
+$15.5M |
| 5 |
Advanced Micro Devices
AMD
|
+$12.9M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 1.23% |
| 2 | Consumer Discretionary | 0.92% |
| 3 | Communication Services | 0.73% |
| 4 | Financials | 0.62% |
| 5 | Industrials | 0.6% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
726
NXP Semiconductors
NXPI
$69.9B
| $3.64M | 0.01% |
33,276
+28,081
| +541% | +$3.1M |
|
727
CALL
Tenet Healthcare
THC
$16.6B
| $3.63M | 0.01% |
1,082
+286
| +36% | +$8.89K |
|
728
PUT
Deckers Outdoor
DECK
$14.1B
| $3.62M | 0.01% |
1,926
+1,008
| +110% | +$17.4K |
|
729
PUT
Zoetis
ZTS
$31.2B
| $3.62M | 0.01% |
425
+403
| +1,832% | +$34K |
|
730
CALL
Stanley Black & Decker
SWK
$13.9B
| $3.61M | 0.01% |
272
+143
| +111% | +$20.6K |
|
|
BLUE
731
DELISTED
bluebird bio
BLUE
| $3.61M | 0.01% |
1,776
+1,768
| +22,100% | +$4.03M |
|
732
CALL
Trade Desk
TTD
$8.14B
| $3.61M | 0.01% |
3,850
+1,130
| +42% | +$7.96K |
|
733
CALL
Applied Optoelectronics
AAOI
$9.36B
| $3.6M | 0.01% |
803
+365
| +83% | +$13K |
|
734
PUT
Royal Caribbean
RCL
$75.8B
| $3.6M | 0.01% |
348
-306
| -47% | -$33.6K |
|
735
US Bancorp
USB
$99.1B
| $3.6M | 0.01% |
72,017
+67,434
| +1,471% | +$3.42M |
|
736
CALL
Sprouts Farmers Market
SFM
$6.73B
| $3.6M | 0.01% |
1,630
+663
| +69% | +$15K |
|
737
PUT
Elevance Health
ELV
$83.3B
| $3.59M | 0.01% |
151
+44
| +41% | +$10.2K |
|
738
PUT
Norfolk Southern
NSC
$79.9B
| $3.59M | 0.01% |
238
+123
| +107% | +$18K |
|
|
MDR
739
PUT
DELISTED
McDermott International
MDR
| $3.59M | 0.01% |
1,827
+1,821
| +30,350% | +$37K |
|
740
PUT
Yelp
YELP
$1.36B
| $3.58M | 0.01% |
913
+311
| +52% | +$13.5K |
|
741
PUT
IPG Photonics
IPGP
$4.22B
| $3.57M | 0.01% |
162
+30
| +23% | +$7.08K |
|
|
AABA
742
DELISTED
Altaba Inc
AABA
| $3.57M | 0.01% |
48,832
-16,223
| -25% | -$1.21M |
|
743
CALL
Rockwell Automation
ROK
$51.1B
| $3.57M | 0.01% |
215
+12
| +6% | +$2.08K |
|
744
PUT
United States Oil Fund
USO
$2.49B
| $3.56M | 0.01% |
296
+244
| +469% | +$26.8K |
|
745
PUT
Corpay
CPAY
$23.1B
| $3.56M | 0.01% |
169
-107
| -39% | -$22K |
|
746
CALL
NextEra Energy
NEE
$186B
| $3.56M | 0.01% |
852
+392
| +85% | +$15.8K |
|
|
LNW
747
PUT
DELISTED
Light & Wonder
LNW
| $3.55M | 0.01% |
722
+474
| +191% | +$25K |
|
748
CALL
Dollar General
DG
$25.7B
| $3.54M | 0.01% |
359
+47
| +15% | +$4.52K |
|
749
PUT
PPG Industries
PPG
$25.7B
| $3.54M | 0.01% |
341
+132
| +63% | +$14K |
|
|
BBBY
750
PUT
Bed Bath & Beyond
BBBY
$472M
| $3.54M | 0.01% |
1,399
+317
| +29% | +$8.61K |
|
Similar funds
Simplex Trading's Q2 2018 Portfolio in Review
As of Q2 2018, Simplex Trading held 8,400 positions worth $25.5B, up 1,022% from $2.27B the previous quarter. Its ten largest holdings account for 29% of the portfolio.
Simplex Trading's Q2 2018 filing shows 2,282 new, 2,314 increased, 2,591 reduced and 1,035 closed positions. Its largest new stake was Alphabet (Google) Class C: 291,860 shares worth $16.3M. The largest sale was Time Warner Inc, an estimated $34.8M.
By sector, the portfolio is most concentrated in Technology at 1.2% of assets, down from 6.2% a quarter earlier, followed by Consumer Discretionary and Communication Services.
- Simplex Trading's largest Q2 2018 buy was Alphabet (Google) Class C: 291,860 shares worth $16.3M.
- Simplex Trading added most to Apple in Q2 2018, an estimated $34.5M increase.
- Simplex Trading's biggest Q2 2018 reduction was Amazon, cutting an estimated $31.2M.
- Simplex Trading fully exited Time Warner Inc in Q2 2018, selling an estimated $34.8M.
- Simplex Trading's ten largest holdings make up 29% of its $25.5B portfolio in Q2 2018.
- Simplex Trading opened 2,282 new positions and closed 1,035 in Q2 2018.
- Simplex Trading's portfolio value rose 1,022% quarter-over-quarter to $25.5B.
Based on Simplex Trading's 13F filing for Q2 2018, filed 30 Jul 2018.