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 |
iShares Russell 2000 ETF
IWM
|
+$58.5M |
| 2 |
Alphabet (Google) Class C
GOOG
|
+$56.5M |
| 3 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$44.1M |
| 4 |
Apple
AAPL
|
+$20.3M |
| 5 |
State Street SPDR S&P Oil & Gas Exploration & Production ETF
XOP
|
+$12.7M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Amazon
AMZN
|
+$109M |
| 2 |
Meta Platforms (Facebook)
META
|
+$62.3M |
| 3 |
Invesco QQQ Trust
QQQ
|
+$36.2M |
| 4 |
Goldman Sachs
GS
|
+$27.1M |
| 5 |
Boeing
BA
|
+$24.7M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Communication Services | 0.49% |
| 2 | Consumer Discretionary | 0.48% |
| 3 | Technology | 0.4% |
| 4 | Financials | 0.25% |
| 5 | Industrials | 0.22% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
501
PUT
Boston Scientific
BSX
$64.2B
| $5.81M | 0.02% |
1,644
-107
| -6% | -$3.88K |
|
502
PUT
Parker-Hannifin
PH
$123B
| $5.8M | 0.02% |
389
+197
| +103% | +$31.9K |
|
503
Northrop Grumman
NOC
$75.3B
| $5.78M | 0.02% |
23,605
+932
| +4% | +$257K |
|
504
CALL
Align Technology
ALGN
$12B
| $5.76M | 0.02% |
275
-207
| -43% | -$52.3K |
|
505
PUT
Diamondback Energy
FANG
$57.7B
| $5.74M | 0.02% |
619
+187
| +43% | +$20.9K |
|
506
IBM
IBM
$193B
| $5.73M | 0.02% |
52,746
+22,568
| +75% | +$2.71M |
|
507
PUT
Motorola Solutions
MSI
$67.5B
| $5.73M | 0.02% |
498
+18
| +4% | +$2.23K |
|
508
PUT
Travelers Companies
TRV
$78.7B
| $5.72M | 0.02% |
478
+274
| +134% | +$34.3K |
|
|
ICPT
509
PUT
DELISTED
Intercept Pharmaceuticals, Inc.
ICPT
| $5.72M | 0.02% |
568
+235
| +71% | +$24.4K |
|
510
CALL
EOG Resources
EOG
$77.8B
| $5.69M | 0.02% |
653
+144
| +28% | +$15.4K |
|
|
PXD
511
CALL
DELISTED
Pioneer Natural Resource Co.
PXD
| $5.64M | 0.02% |
429
-6
| -1% | -$917 |
|
512
CALL
WisdomTree US Total Dividend Fund
DTD
$1.64B
| $5.63M | 0.02% |
3,334
+1,682
| +102% | +$76.4K |
|
513
PUT
Allstate
ALL
$65.3B
| $5.6M | 0.02% |
678
+416
| +159% | +$37.4K |
|
|
ETFC
514
PUT
DELISTED
E*Trade Financial Corporation
ETFC
| $5.59M | 0.02% |
1,274
-540
| -30% | -$26.5K |
|
515
CALL
Cognizant
CTSH
$20.2B
| $5.59M | 0.02% |
880
+279
| +46% | +$19.4K |
|
516
CALL
D.R. Horton
DHI
$39.3B
| $5.58M | 0.02% |
1,611
+55
| +4% | +$2.01K |
|
517
PUT
Nexstar Media Group
NXST
$5.46B
| $5.58M | 0.02% |
710
+600
| +545% | +$47.5K |
|
518
PUT
Zoetis
ZTS
$31B
| $5.57M | 0.02% |
651
+24
| +4% | +$2.16K |
|
519
CALL
VeriSign
VRSN
$23.5B
| $5.55M | 0.02% |
374
+81
| +28% | +$12.1K |
|
|
ESIO
520
CALL
DELISTED
Electro Scientific Industries
ESIO
| $5.53M | 0.02% |
1,846
+1,795
| +3,520% | +$44.6K |
|
521
PUT
MetLife
MET
$59.5B
| $5.53M | 0.02% |
1,652
+582
| +54% | +$25K |
|
522
DuPont de Nemours
DD
$18.5B
| $5.49M | 0.02% |
40,510
+34,659
| +592% | +$4.98M |
|
523
PUT
Check Point Software Technologies
CHKP
$13.1B
| $5.48M | 0.02% |
534
+54
| +11% | +$5.93K |
|
524
CALL
Charter Communications
CHTR
$15.4B
| $5.47M | 0.02% |
192
-42
| -18% | -$13.2K |
|
525
CALL
Veeva Systems
VEEV
$29.4B
| $5.46M | 0.02% |
611
+130
| +27% | +$11.9K |
|
Similar funds
Simplex Trading's Q4 2018 Portfolio in Review
As of Q4 2018, Simplex Trading held 8,576 positions worth $34.1B, up 9.5% from $31.1B the previous quarter. Its ten largest holdings account for 43% of the portfolio.
Simplex Trading's Q4 2018 filing shows 1,199 new, 2,701 increased, 2,877 reduced and 1,573 closed positions. Its largest new stake was State Street SPDR S&P 500 ETF Trust: 163,699 shares worth $40.9M. The largest sale was Amazon, an estimated $109M.
By sector, the portfolio is most concentrated in Communication Services at 0.49% of assets, down from 0.89% a quarter earlier, followed by Consumer Discretionary and Technology.
- Simplex Trading's largest Q4 2018 buy was State Street SPDR S&P 500 ETF Trust: 163,699 shares worth $40.9M.
- Simplex Trading added most to iShares Russell 2000 ETF in Q4 2018, an estimated $58.5M increase.
- Simplex Trading's biggest Q4 2018 reduction was Amazon, cutting an estimated $109M.
- Simplex Trading fully exited Meta Platforms (Facebook) in Q4 2018, selling an estimated $62.3M.
- Simplex Trading's ten largest holdings make up 43% of its $34.1B portfolio in Q4 2018.
- Simplex Trading opened 1,199 new positions and closed 1,573 in Q4 2018.
- Simplex Trading's portfolio value rose 9.5% quarter-over-quarter to $34.1B.
Based on Simplex Trading's 13F filing for Q4 2018, filed 16 Jan 2019.