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 | |
|---|---|---|---|---|---|---|
|
WPX
1651
PUT
DELISTED
WPX Energy, Inc.
WPX
| $1.16M | ﹤0.01% |
646
+444
| +220% | +$7.6K |
|
|
CS
1652
DELISTED
Credit Suisse Group
CS
| $1.16M | ﹤0.01% |
+78,195
| New | +$1.26M |
|
|
AKRX
1653
DELISTED
Akorn Inc
AKRX
| $1.16M | ﹤0.01% |
70,104
+51,999
| +287% | +$798K |
|
1654
CALL
Vanguard High Dividend Yield ETF
VYM
$81.1B
| $1.16M | ﹤0.01% |
140
-14
| -9% | -$1.17K |
|
1655
PUT
Jones Lang LaSalle
JLL
$15.1B
| $1.16M | ﹤0.01% |
70
+53
| +312% | +$9.01K |
|
|
MIK
1656
CALL
DELISTED
Michaels Stores, Inc
MIK
| $1.16M | ﹤0.01% |
606
+305
| +101% | +$5.8K |
|
1657
PUT
Liberty Global Class C
LBTYK
$3.25B
| $1.16M | ﹤0.01% |
+423
| New | +$12.4K |
|
1658
PUT
Snap-on
SNA
$20.9B
| $1.16M | ﹤0.01% |
72
-25
| -26% | -$3.78K |
|
1659
CALL
Red Robin
RRGB
$134M
| $1.16M | ﹤0.01% |
248
+114
| +85% | +$6.46K |
|
1660
CALL
Sysco
SYY
$39.7B
| $1.15M | ﹤0.01% |
169
-129
| -43% | -$8.24K |
|
|
LSI
1661
DELISTED
Life Storage, Inc.
LSI
| $1.15M | ﹤0.01% |
17,799
-17,114
| -49% | -$1.03M |
|
1662
Harley-Davidson
HOG
$2.68B
| $1.15M | ﹤0.01% |
+27,398
| New | +$1.15M |
|
|
SRG
1663
Seritage Growth Properties
SRG
$130M
| $1.15M | ﹤0.01% |
27,093
+23,181
| +593% | +$905K |
|
|
ULTI
1664
DELISTED
Ultimate Software Group Inc
ULTI
| $1.15M | ﹤0.01% |
+4,462
| New | +$1.15M |
|
1665
PUT
Etsy
ETSY
$7.65B
| $1.15M | ﹤0.01% |
272
-18
| -6% | -$586 |
|
1666
Citizens Financial Group
CFG
$30.4B
| $1.15M | ﹤0.01% |
29,464
+29,064
| +7,266% | +$1.21M |
|
|
K
1667
CALL
DELISTED
Kellanova
K
| $1.15M | ﹤0.01% |
175
-431
| -71% | -$25.6K |
|
|
KFYP
1668
PUT
DELISTED
KraneShares CICC China Leaders 100 Index ETF
KFYP
| $1.15M | ﹤0.01% |
314
+187
| +147% | +$6.38K |
|
1669
CALL
Burlington
BURL
$22B
| $1.14M | ﹤0.01% |
76
+5
| +7% | +$712 |
|
1670
Trade Desk
TTD
$8.13B
| $1.14M | ﹤0.01% |
122,050
+107,490
| +738% | +$757K |
|
|
SPR
1671
CALL
DELISTED
Spirit AeroSystems
SPR
| $1.14M | ﹤0.01% |
133
-258
| -66% | -$21.7K |
|
1672
CALL
Bausch Health
BHC
$1.65B
| $1.14M | ﹤0.01% |
2,281
-49
| -2% | -$1.01K |
|
1673
CALL
G-III Apparel Group
GIII
$1.47B
| $1.14M | ﹤0.01% |
257
+69
| +37% | +$2.8K |
|
1674
CALL
Ally Financial
ALLY
$13.1B
| $1.14M | ﹤0.01% |
434
+292
| +206% | +$7.79K |
|
1675
CALL
FirstEnergy
FE
$28.9B
| $1.14M | ﹤0.01% |
317
-245
| -44% | -$8.39K |
|
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.