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 | |
|---|---|---|---|---|---|---|
476
PUT
Trip.com Group
TCOM
$26.8B
| $6.41M | 0.03% |
1,345
-393
| -23% | -$17.8K |
|
|
TIF
477
PUT
DELISTED
Tiffany & Co.
TIF
| $6.39M | 0.03% |
486
+188
| +63% | +$21.5K |
|
478
PUT
MetLife
MET
$60B
| $6.39M | 0.03% |
1,795
-1,863
| -51% | -$86.9K |
|
|
WWE
479
CALL
DELISTED
World Wrestling Entertainment
WWE
| $6.39M | 0.03% |
878
+853
| +3,412% | +$43.2K |
|
480
PUT
AB InBev
BUD
$161B
| $6.39M | 0.03% |
634
-355
| -36% | -$35.2K |
|
481
PUT
Accenture
ACN
$85.7B
| $6.33M | 0.02% |
387
+141
| +57% | +$21.9K |
|
482
CALL
Charter Communications
CHTR
$15.9B
| $6.3M | 0.02% |
215
+3
| +1% | +$862 |
|
483
PUT
Colgate-Palmolive
CL
$73.3B
| $6.27M | 0.02% |
968
-589
| -38% | -$38.5K |
|
484
Regeneron Pharmaceuticals
REGN
$68.3B
| $6.22M | 0.02% |
+18,045
| New | +$5.64M |
|
485
PUT
PVH
PVH
$3.69B
| $6.15M | 0.02% |
411
+225
| +121% | +$35.4K |
|
|
ANDV
486
PUT
DELISTED
Andeavor
ANDV
| $6.15M | 0.02% |
469
-110
| -19% | -$14.5K |
|
487
PUT
Cognizant
CTSH
$20.4B
| $6.14M | 0.02% |
778
-148
| -16% | -$11.6K |
|
|
GBT
488
CALL
DELISTED
Global Blood Therapeutics, Inc.
GBT
| $6.14M | 0.02% |
1,359
+1,027
| +309% | +$46.8K |
|
489
PUT
Dell
DELL
$285B
| $6.14M | 0.02% |
2,587
+1,016
| +65% | +$22.5K |
|
490
Wynn Resorts
WYNN
$9.79B
| $6.13M | 0.02% |
+36,604
| New | +$6.76M |
|
491
CALL
Chubb
CB
$133B
| $6.11M | 0.02% |
481
-34
| -7% | -$4.52K |
|
|
MOMO
492
PUT
Hello Group
MOMO
$876M
| $6.09M | 0.02% |
1,401
+189
| +16% | +$7.85K |
|
493
Starbucks
SBUX
$119B
| $6.07M | 0.02% |
+124,317
| New | +$7.06M |
|
494
PUT
DuPont de Nemours
DD
$18.9B
| $6.02M | 0.02% |
361
-153
| -30% | -$25.6K |
|
495
PUT
Whirlpool
WHR
$2.41B
| $6.02M | 0.02% |
412
-106
| -20% | -$16.1K |
|
496
PUT
Domino's
DPZ
$10.6B
| $6.01M | 0.02% |
213
+58
| +37% | +$14.7K |
|
497
PUT
DaVita
DVA
$14.9B
| $5.98M | 0.02% |
861
+717
| +498% | +$47.9K |
|
498
PUT
Mohawk Industries
MHK
$6.73B
| $5.98M | 0.02% |
279
+58
| +26% | +$12.7K |
|
|
PX
499
CALL
DELISTED
Praxair Inc
PX
| $5.96M | 0.02% |
377
-3,592
| -91% | -$555K |
|
|
500
CALL
Whirlpool
WHR
$2.41B
| $5.95M | 0.02% |
407
+230
| +130% | +$34.9K |
|
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.