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 | |
|---|---|---|---|---|---|---|
476
PUT
WisdomTree US Total Dividend Fund
DTD
$1.64B
| $6.37M | 0.02% |
3,462
+1,228
| +55% | +$55.8K |
|
477
CALL
eBay
EBAY
$48B
| $6.36M | 0.02% |
2,266
+1,425
| +169% | +$41.9K |
|
478
CALL
Simon Property Group
SPG
$73.5B
| $6.33M | 0.02% |
377
+186
| +97% | +$33.3K |
|
479
PUT
Ionis Pharmaceuticals
IONS
$9.34B
| $6.33M | 0.02% |
1,170
+457
| +64% | +$23.3K |
|
|
AABA
480
PUT
DELISTED
Altaba Inc
AABA
| $6.29M | 0.02% |
1,086
-485
| -31% | -$29.9K |
|
481
CALL
Yum! Brands
YUM
$41B
| $6.29M | 0.02% |
684
+23
| +3% | +$2.06K |
|
482
PUT
Kroger
KR
$34.1B
| $6.26M | 0.02% |
2,277
+456
| +25% | +$13.2K |
|
483
CALL
BP
BP
$114B
| $6.26M | 0.02% |
1,703
-2,162
| -56% | -$86.3K |
|
484
PUT
TSMC
TSM
$2.14T
| $6.26M | 0.02% |
1,695
+1,089
| +180% | +$41.5K |
|
485
CALL
Boston Scientific
BSX
$64.2B
| $6.25M | 0.02% |
1,770
-1,144
| -39% | -$41.5K |
|
486
iShares MSCI Brazil ETF
EWZ
$9.15B
| $6.25M | 0.02% |
+163,714
| New | +$6.34M |
|
487
CALL
Kohl's
KSS
$2.03B
| $6.21M | 0.02% |
936
-242
| -21% | -$17K |
|
488
iShares Russell 2000 Growth ETF
IWO
$14.5B
| $6.19M | 0.02% |
36,828
+31,401
| +579% | +$5.86M |
|
489
CALL
HCA Healthcare
HCA
$83.1B
| $6.15M | 0.02% |
494
+150
| +44% | +$20.1K |
|
490
CALL
Phillips 66
PSX
$84.8B
| $6.13M | 0.02% |
711
+66
| +10% | +$6.45K |
|
491
CALL
Invesco CurrencyShares British Pound Sterling Trust
FXB
$76.8M
| $6.07M | 0.02% |
491
+386
| +368% | +$48.2K |
|
492
GE Aerospace
GE
$362B
| $6.06M | 0.02% |
167,029
+99,415
| +147% | +$4.49M |
|
493
State Street Consumer Staples Select Sector SPDR ETF
XLP
$14B
| $5.97M | 0.02% |
117,621
+39,383
| +50% | +$2.14M |
|
494
CALL
Vail Resorts
MTN
$5.11B
| $5.97M | 0.02% |
283
+86
| +44% | +$21.3K |
|
|
DISH
495
PUT
DELISTED
DISH Network Corp.
DISH
| $5.96M | 0.02% |
2,387
+432
| +22% | +$13.6K |
|
|
496
PUT
Phillips 66
PSX
$84.8B
| $5.94M | 0.02% |
690
+8
| +1% | +$782 |
|
|
BNY
497
PUT
Bank of New York Mellon
BNY
$108B
| $5.94M | 0.02% |
1,262
+626
| +98% | +$30.4K |
|
498
CALL
Idexx Laboratories
IDXX
$42.5B
| $5.93M | 0.02% |
319
+264
| +480% | +$54.1K |
|
499
CALL
Capital One
COF
$121B
| $5.93M | 0.02% |
784
+116
| +17% | +$10K |
|
|
WW
500
PUT
DELISTED
WW International
WW
| $5.92M | 0.02% |
1,536
-889
| -37% | -$48.8K |
|
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.