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 | |
|---|---|---|---|---|---|---|
401
CALL
Teva Pharmaceuticals
TEVA
$35.1B
| $8.13M | 0.03% |
3,344
+1,693
| +103% | +$34.5K |
|
402
CALL
First Solar
FSLR
$22.4B
| $8.13M | 0.03% |
1,544
+784
| +103% | +$51.3K |
|
403
CALL
Albemarle
ALB
$13.9B
| $8.12M | 0.03% |
861
+685
| +389% | +$65.8K |
|
404
CALL
Marathon Petroleum
MPC
$92.2B
| $8.1M | 0.03% |
1,155
+501
| +77% | +$38.3K |
|
405
PUT
J.M. Smucker
SJM
$12.6B
| $8.1M | 0.03% |
754
+730
| +3,042% | +$82K |
|
406
CALL
ProShares Ultra S&P500
SSO
$8.02B
| $8.09M | 0.03% |
7,872
+3,192
| +68% | +$44K |
|
407
CALL
eBay
EBAY
$49.3B
| $8.07M | 0.03% |
2,227
+279
| +14% | +$10.9K |
|
408
CALL
Coca-Cola
KO
$354B
| $8.03M | 0.03% |
1,830
+261
| +17% | +$11.3K |
|
409
PUT
Mercado Libre
MELI
$91.2B
| $7.95M | 0.03% |
266
+19
| +8% | +$5.99K |
|
410
CALL
Corpay
CPAY
$23.5B
| $7.94M | 0.03% |
377
+341
| +947% | +$70K |
|
411
PUT
American Airlines Group
AAL
$9.78B
| $7.92M | 0.03% |
2,087
+474
| +29% | +$20.9K |
|
412
PUT
Herbalife
HLF
$1.26B
| $7.89M | 0.03% |
1,469
-815
| -36% | -$42.8K |
|
413
CALL
Capital One
COF
$124B
| $7.79M | 0.03% |
848
+224
| +36% | +$21.2K |
|
414
PUT
Bread Financial
BFH
$4.12B
| $7.79M | 0.03% |
419
+78
| +23% | +$13.3K |
|
415
PUT
Parker-Hannifin
PH
$122B
| $7.76M | 0.03% |
498
+395
| +383% | +$67.4K |
|
416
CALL
EOG Resources
EOG
$76.7B
| $7.73M | 0.03% |
621
-217
| -26% | -$25.2K |
|
417
CALL
International Paper
IP
$20.2B
| $7.69M | 0.03% |
1,559
+387
| +33% | +$19.8K |
|
418
PUT
Cigna
CI
$75.4B
| $7.58M | 0.03% |
446
+161
| +56% | +$27.9K |
|
|
TIF
419
CALL
DELISTED
Tiffany & Co.
TIF
| $7.55M | 0.03% |
574
+239
| +71% | +$27.3K |
|
420
AT&T
T
$160B
| $7.51M | 0.03% |
309,620
+12,092
| +4% | +$304K |
|
421
PUT
Ferrari
RACE
$65.4B
| $7.49M | 0.03% |
555
+203
| +58% | +$26.7K |
|
422
PUT
Qorvo
QRVO
$7.89B
| $7.48M | 0.03% |
933
+610
| +189% | +$47.2K |
|
423
PUT
Humana
HUM
$47.7B
| $7.47M | 0.03% |
251
-121
| -33% | -$35.4K |
|
424
CALL
Waste Management
WM
$94.9B
| $7.41M | 0.03% |
911
-62
| -6% | -$5.13K |
|
|
SPLK
425
CALL
DELISTED
Splunk Inc
SPLK
| $7.36M | 0.03% |
743
+330
| +80% | +$35.9K |
|
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.