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 | |
|---|---|---|---|---|---|---|
576
PUT
HF Sinclair
DINO
$16.4B
| $4.82M | 0.02% |
705
+673
| +2,103% | +$44.8K |
|
577
CALL
Capri Holdings
CPRI
$1.86B
| $4.82M | 0.02% |
723
-157
| -18% | -$10.3K |
|
578
CALL
Public Storage
PSA
$54.7B
| $4.81M | 0.02% |
212
-614
| -74% | -$128K |
|
579
PUT
Seagate
STX
$205B
| $4.8M | 0.02% |
851
-635
| -43% | -$36.7K |
|
580
PUT
Papa John's
PZZA
$1.05B
| $4.8M | 0.02% |
947
+135
| +17% | +$7.57K |
|
581
CALL
Hain Celestial
HAIN
$51.4M
| $4.8M | 0.02% |
1,610
-47,691
| -97% | -$1.37M |
|
582
PUT
Viatris
VTRS
$19.8B
| $4.79M | 0.02% |
1,326
+276
| +26% | +$10.8K |
|
583
PUT
WisdomTree US Total Dividend Fund
DTD
$1.65B
| $4.79M | 0.02% |
2,294
-2,840
| -55% | -$129K |
|
584
PUT
Lumen
LUMN
$6.9B
| $4.77M | 0.02% |
2,560
+1,304
| +104% | +$23.7K |
|
585
PUT
Hilton Worldwide
HLT
$73.8B
| $4.75M | 0.02% |
600
+388
| +183% | +$31.6K |
|
586
CALL
KLA
KLAC
$280B
| $4.73M | 0.02% |
4,610
+3,610
| +361% | +$39.2K |
|
|
587
PUT
Public Storage
PSA
$54.7B
| $4.72M | 0.02% |
208
-153
| -42% | -$31.9K |
|
588
CALL
Novartis
NVS
$291B
| $4.71M | 0.02% |
696
+256
| +58% | +$17.7K |
|
589
PUT
Motorola Solutions
MSI
$67.1B
| $4.71M | 0.02% |
405
-15
| -4% | -$1.65K |
|
590
CALL
APA Corp
APA
$12.8B
| $4.7M | 0.02% |
1,006
-513
| -34% | -$21.3K |
|
591
PUT
Twilio
TWLO
$27.8B
| $4.69M | 0.02% |
838
-123
| -13% | -$6.09K |
|
592
Diamondback Energy
FANG
$57.1B
| $4.69M | 0.02% |
+35,659
| New | +$4.42M |
|
593
PUT
Sherwin-Williams
SHW
$78.9B
| $4.69M | 0.02% |
345
-72
| -17% | -$9.32K |
|
594
PUT
Marvell Technology
MRVL
$189B
| $4.65M | 0.02% |
2,170
+1,979
| +1,036% | +$42.2K |
|
595
CALL
Equinix
EQIX
$101B
| $4.64M | 0.02% |
108
+71
| +192% | +$28.7K |
|
596
PUT
NetApp
NTAP
$32.6B
| $4.64M | 0.02% |
591
+130
| +28% | +$9.14K |
|
597
Palo Alto Networks
PANW
$273B
| $4.64M | 0.02% |
135,408
+37,092
| +38% | +$1.24M |
|
598
CALL
Kroger
KR
$35.3B
| $4.62M | 0.02% |
1,623
+596
| +58% | +$15K |
|
599
CALL
T. Rowe Price
TROW
$24.9B
| $4.61M | 0.02% |
397
-187
| -32% | -$21.7K |
|
|
ATHN
600
CALL
DELISTED
Athenahealth, Inc.
ATHN
| $4.6M | 0.02% |
289
+270
| +1,421% | +$40K |
|
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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.