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 | |
|---|---|---|---|---|---|---|
651
PUT
Kroger
KR
$35.3B
| $4.18M | 0.02% |
1,468
-2,545
| -63% | -$64K |
|
652
New Oriental
EDU
$7.75B
| $4.17M | 0.02% |
44,005
+4,021
| +10% | +$385K |
|
|
ANDV
653
DELISTED
Andeavor
ANDV
| $4.16M | 0.02% |
31,694
+16,016
| +102% | +$2.11M |
|
654
CALL
ProShares UltraShort Industrials
SIJ
$5.96M
| $4.13M | 0.02% |
162
-119
| -42% | -$31.4K |
|
655
CALL
Harley-Davidson
HOG
$2.91B
| $4.11M | 0.02% |
977
-294
| -23% | -$12.4K |
|
656
CALL
Genuine Parts
GPC
$16.6B
| $4.09M | 0.02% |
446
+70
| +19% | +$6.39K |
|
657
CALL
BJ's Restaurants
BJRI
$1.42B
| $4.09M | 0.02% |
681
+212
| +45% | +$11.4K |
|
|
XLNX
658
PUT
DELISTED
Xilinx Inc
XLNX
| $4.08M | 0.02% |
626
+144
| +30% | +$9.82K |
|
|
WW
659
CALL
DELISTED
WW International
WW
| $4.08M | 0.02% |
404
-170
| -30% | -$13.4K |
|
660
PUT
LendingTree
TREE
$578M
| $4.08M | 0.02% |
191
+82
| +75% | +$22.7K |
|
|
DATA
661
CALL
DELISTED
Tableau Software, Inc.
DATA
| $4.06M | 0.02% |
415
+354
| +580% | +$32.5K |
|
662
PUT
Carter's
CRI
$1.41B
| $4.05M | 0.02% |
374
+43
| +13% | +$4.62K |
|
663
CALL
Molson Coors Class B
TAP
$7.7B
| $4.05M | 0.02% |
595
+287
| +93% | +$19.1K |
|
|
WLL
664
CALL
DELISTED
Whiting Petroleum Corporation
WLL
| $4.04M | 0.02% |
10
-11
| -52% | -$38K |
|
665
General Motors
GM
$74.3B
| $4.01M | 0.02% |
101,726
-17,384
| -15% | -$684K |
|
666
Northrop Grumman
NOC
$74.6B
| $4.01M | 0.02% |
13,022
+12,864
| +8,142% | +$4.25M |
|
667
CALL
Suncor Energy
SU
$76.4B
| $4.01M | 0.02% |
985
-229
| -19% | -$8.92K |
|
668
CALL
Seagate
STX
$205B
| $4M | 0.02% |
709
-685
| -49% | -$39.6K |
|
|
CIT
669
DELISTED
CIT Group Inc.
CIT
| $3.98M | 0.02% |
+79,001
| New | +$4.12M |
|
670
PUT
Blackstone
BX
$150B
| $3.98M | 0.02% |
1,237
-1,416
| -53% | -$45.1K |
|
671
Direxion Daily Small Cap Bull 3x ETF
TNA
$1.38B
| $3.98M | 0.02% |
48,396
+14,453
| +43% | +$1.12M |
|
672
PUT
Regency Centers
REG
$15.1B
| $3.97M | 0.02% |
639
+383
| +150% | +$22.5K |
|
673
PUT
TSMC
TSM
$2.18T
| $3.97M | 0.02% |
1,085
+442
| +69% | +$17.5K |
|
674
CALL
Hershey
HSY
$35B
| $3.96M | 0.02% |
426
+312
| +274% | +$29.1K |
|
|
ROCC
675
PUT
DELISTED
Ranger Oil Corporation Class A Common Stock
ROCC
| $3.96M | 0.02% |
467
+342
| +274% | +$20.5K |
|
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.