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 | |
|---|---|---|---|---|---|---|
951
CALL
Royal Gold
RGLD
$16.9B
| $2.63M | 0.01% |
283
+154
| +119% | +$13.8K |
|
|
PARA
952
CALL
DELISTED
Paramount Global Class B
PARA
| $2.61M | 0.01% |
465
-274
| -37% | -$14.3K |
|
|
SAFM
953
PUT
DELISTED
Sanderson Farms Inc
SAFM
| $2.61M | 0.01% |
248
+226
| +1,027% | +$24.5K |
|
|
HDS
954
PUT
DELISTED
HD Supply Holdings, Inc.
HDS
| $2.61M | 0.01% |
608
-381
| -39% | -$15.4K |
|
955
CALL
Crown Castle
CCI
$32.5B
| $2.6M | 0.01% |
241
-414
| -63% | -$43K |
|
956
State Street SPDR S&P Regional Banking ETF
KRE
$4.82B
| $2.6M | 0.01% |
42,598
+25,648
| +151% | +$1.61M |
|
957
CALL
Crane NXT
CXT
$3B
| $2.6M | 0.01% |
933
+766
| +459% | +$23.1K |
|
|
SCHW
958
Charles Schwab
SCHW
$177B
| $2.59M | 0.01% |
+50,689
| New | +$2.81M |
|
|
FDC
959
CALL
DELISTED
First Data Corporation
FDC
| $2.59M | 0.01% |
1,237
+861
| +229% | +$16K |
|
|
LNW
960
DELISTED
Light & Wonder
LNW
| $2.59M | 0.01% |
52,637
+52,437
| +26,219% | +$2.77M |
|
961
CALL
Conagra Brands
CAG
$6.88B
| $2.59M | 0.01% |
724
+57
| +9% | +$2.12K |
|
962
CALL
Weyerhaeuser
WY
$17B
| $2.57M | 0.01% |
706
+254
| +56% | +$9.29K |
|
|
SINA
963
PUT
DELISTED
Sina Corp
SINA
| $2.57M | 0.01% |
308
-79
| -20% | -$7.35K |
|
|
EGRX
964
CALL
DELISTED
Eagle Pharmaceuticals, Inc.
EGRX
| $2.57M | 0.01% |
340
+131
| +63% | +$8.24K |
|
|
GAP
965
PUT
The Gap Inc
GAP
$6.8B
| $2.57M | 0.01% |
794
-408
| -34% | -$12.6K |
|
|
LNW
966
CALL
DELISTED
Light & Wonder
LNW
| $2.57M | 0.01% |
523
-46,718
| -99% | -$2.47M |
|
967
CALL
Urban Outfitters
URBN
$5.96B
| $2.57M | 0.01% |
577
+104
| +22% | +$4.35K |
|
968
TransDigm Group
TDG
$67.9B
| $2.57M | 0.01% |
7,438
+2,935
| +65% | +$964K |
|
969
CALL
Centene
CNC
$31.5B
| $2.56M | 0.01% |
416
+352
| +550% | +$20.3K |
|
970
Regions Financial
RF
$26.2B
| $2.56M | 0.01% |
+144,135
| New | +$2.7M |
|
|
ATHN
971
DELISTED
Athenahealth, Inc.
ATHN
| $2.56M | 0.01% |
16,104
+13,721
| +576% | +$2.03M |
|
|
MDR
972
CALL
DELISTED
McDermott International
MDR
| $2.56M | 0.01% |
1,303
+1,208
| +1,272% | +$24.5K |
|
973
D.R. Horton
DHI
$39.9B
| $2.55M | 0.01% |
62,262
+44,113
| +243% | +$1.9M |
|
974
PUT
MasTec
MTZ
$28.4B
| $2.55M | 0.01% |
503
+483
| +2,415% | +$23.3K |
|
975
Carnival Corporation Ltd
CCL
$34.6B
| $2.55M | 0.01% |
+44,472
| New | +$2.82M |
|
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.