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 | |
|---|---|---|---|---|---|---|
1601
PUT
Yum China
YUMC
$14.9B
| $1.04M | ﹤0.01% |
309
-180
| -37% | -$6.18K |
|
1602
Deere & Co
DE
$170B
| $1.03M | ﹤0.01% |
6,945
-20,399
| -75% | -$2.99M |
|
1603
iShares MSCI United Kingdom ETF
EWU
$4.04B
| $1.03M | ﹤0.01% |
35,255
+26,631
| +309% | +$839K |
|
1604
Encompass Health
EHC
$11.2B
| $1.03M | ﹤0.01% |
20,978
+16,155
| +335% | +$919K |
|
1605
CALL
Abercrombie & Fitch
ANF
$4.17B
| $1.03M | ﹤0.01% |
513
-366
| -42% | -$6.85K |
|
|
IMPV
1606
PUT
DELISTED
Imperva, Inc.
IMPV
| $1.02M | ﹤0.01% |
184
+162
| +736% | +$8.8K |
|
1607
CALL
Designer Brands
DBI
$277M
| $1.02M | ﹤0.01% |
414
+249
| +151% | +$6.68K |
|
1608
PUT
FirstEnergy
FE
$28.9B
| $1.02M | ﹤0.01% |
272
+188
| +224% | +$7.12K |
|
|
TSG
1609
PUT
DELISTED
The Stars Group Inc.
TSG
| $1.02M | ﹤0.01% |
617
+507
| +461% | +$9.9K |
|
1610
PUT
Edison International
EIX
$30.7B
| $1.02M | ﹤0.01% |
179
-4
| -2% | -$249 |
|
|
NUVA
1611
PUT
DELISTED
NuVasive, Inc.
NUVA
| $1.01M | ﹤0.01% |
205
+30
| +17% | +$1.8K |
|
|
FNSR
1612
CALL
DELISTED
Finisar Corp
FNSR
| $1.01M | ﹤0.01% |
470
+244
| +108% | +$4.86K |
|
1613
Welltower
WELL
$178B
| $1.01M | ﹤0.01% |
14,602
+14,100
| +2,809% | +$959K |
|
|
AMTD
1614
CALL
DELISTED
TD Ameritrade Holding Corp
AMTD
| $1.01M | ﹤0.01% |
207
-357
| -63% | -$18.2K |
|
1615
CALL
Synaptics
SYNA
$4.41B
| $1.01M | ﹤0.01% |
272
-522
| -66% | -$19.6K |
|
1616
PUT
Omnicom Group
OMC
$22.7B
| $1.01M | ﹤0.01% |
138
-279
| -67% | -$20.7K |
|
|
XLRN
1617
CALL
DELISTED
Acceleron Pharma
XLRN
| $1.01M | ﹤0.01% |
232
+143
| +161% | +$7.14K |
|
1618
CALL
HF Sinclair
DINO
$15.9B
| $1.01M | ﹤0.01% |
197
-57
| -22% | -$3.49K |
|
1619
Thor Industries
THO
$3.99B
| $1.01M | ﹤0.01% |
19,379
+1,271
| +7% | +$86K |
|
1620
PUT
Avery Dennison
AVY
$12.3B
| $1.01M | ﹤0.01% |
112
-52
| -32% | -$4.89K |
|
|
DNKN
1621
CALL
DELISTED
Dunkin' Brands Group, Inc.
DNKN
| $1.01M | ﹤0.01% |
157
+89
| +131% | +$6.33K |
|
|
TVPT
1622
PUT
DELISTED
Travelport Worldwide Limited
TVPT
| $1M | ﹤0.01% |
644
+570
| +770% | +$8.69K |
|
|
DQ
1623
PUT
Daqo New Energy
DQ
$790M
| $1M | ﹤0.01% |
2,145
+1,700
| +382% | +$8.35K |
|
1624
McKesson
MCK
$98.5B
| $1M | ﹤0.01% |
9,081
+4,766
| +110% | +$594K |
|
|
ULTI
1625
CALL
DELISTED
Ultimate Software Group Inc
ULTI
| $1M | ﹤0.01% |
41
+24
| +141% | +$6.36K |
|
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.