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 | |
|---|---|---|---|---|---|---|
|
HBI
1501
CALL
DELISTED
Hanesbrands
HBI
| $1.35M | 0.01% |
612
+456
| +292% | +$8.6K |
|
1502
PUT
Ubiquiti
UI
$31.8B
| $1.35M | 0.01% |
159
-31
| -16% | -$2.43K |
|
|
LLL
1503
PUT
DELISTED
L3 Technologies, Inc.
LLL
| $1.35M | 0.01% |
70
-22
| -24% | -$4.39K |
|
1504
CALL
Prothena Corp
PRTA
$458M
| $1.34M | 0.01% |
922
+678
| +278% | +$13.4K |
|
|
RP
1505
CALL
DELISTED
RealPage, Inc.
RP
| $1.34M | 0.01% |
244
+240
| +6,000% | +$13.6K |
|
1506
CALL
Huazhu Hotels Group
HTHT
$12.4B
| $1.34M | 0.01% |
320
-140
| -30% | -$5.59K |
|
1507
Match Group
MTCH
$8.84B
| $1.34M | 0.01% |
34,673
+26,266
| +312% | +$1.1M |
|
1508
Factset
FDS
$9.05B
| $1.34M | 0.01% |
+6,777
| New | +$1.35M |
|
1509
Qorvo
QRVO
$7.63B
| $1.34M | 0.01% |
+16,736
| New | +$1.29M |
|
1510
CALL
Raymond James Financial
RJF
$32.5B
| $1.34M | 0.01% |
225
-144
| -39% | -$8.94K |
|
1511
PUT
Fastenal
FAST
$54B
| $1.34M | 0.01% |
1,112
-540
| -33% | -$6.99K |
|
1512
PUT
First Financial Bankshares
FFIN
$4.97B
| $1.34M | 0.01% |
526
-422
| -45% | -$10.8K |
|
1513
PUT
Ecopetrol
EC
$32.9B
| $1.34M | 0.01% |
651
+641
| +6,410% | +$13.6K |
|
1514
PUT
Global Payments
GPN
$22.1B
| $1.34M | 0.01% |
120
-60
| -33% | -$6.78K |
|
1515
ResMed
RMD
$28.3B
| $1.34M | 0.01% |
12,911
+8,515
| +194% | +$862K |
|
1516
CALL
American Electric Power
AEP
$73.7B
| $1.34M | 0.01% |
193
+57
| +42% | +$3.84K |
|
1517
PUT
Trane Technologies
TT
$106B
| $1.34M | 0.01% |
149
+41
| +38% | +$3.6K |
|
|
GRA
1518
CALL
DELISTED
W.R. Grace & Co.
GRA
| $1.33M | 0.01% |
+182
| New | +$12.8K |
|
|
XEC
1519
CALL
DELISTED
CIMAREX ENERGY CO
XEC
| $1.33M | 0.01% |
131
+96
| +274% | +$9.12K |
|
|
BEAT
1520
CALL
DELISTED
BioTelemetry, Inc.
BEAT
| $1.33M | 0.01% |
296
-24,692
| -99% | -$985K |
|
1521
PUT
Xtrackers MSCI Emerging Markets Hedged Equity ETF
DBEM
$105M
| $1.33M | 0.01% |
502
-27
| -5% | -$648 |
|
1522
PUT
Boston Properties
BXP
$11B
| $1.33M | 0.01% |
+106
| New | +$12.9K |
|
1523
CALL
Liberty Latin America Class C
LILAK
$1.5B
| $1.33M | 0.01% |
812
-271
| -25% | -$4.73K |
|
1524
PUT
Ingredion
INGR
$6.38B
| $1.33M | 0.01% |
+120
| New | +$14.1K |
|
1525
PUT
Plains All American Pipeline
PAA
$17.4B
| $1.33M | 0.01% |
562
+259
| +85% | +$6.24K |
|
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.