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 | |
|---|---|---|---|---|---|---|
5076
America Movil
AMX
$76B
| $27K | ﹤0.01% |
+1,950
| New | +$28K |
|
5077
PUT
ArcBest
ARCB
$3.17B
| $27K | ﹤0.01% |
+8
| New | +$310 |
|
5078
CALL
Atmos Energy
ATO
$29.1B
| $27K | ﹤0.01% |
3
+1
| +50% | +$96 |
|
5079
CALL
Coherus Oncology
CHRS
$227M
| $27K | ﹤0.01% |
30
+29
| +2,900% | +$336 |
|
5080
PUT
CEMIG Preferred Shares
CIG
$6.21B
| $27K | ﹤0.01% |
153
+114
| +292% | +$172 |
|
5081
CALL
Cohen & Steers
CNS
$4.19B
| $27K | ﹤0.01% |
+8
| New | +$296 |
|
5082
CALL
Evolution Petroleum
EPM
$131M
| $27K | ﹤0.01% |
41
+21
| +105% | +$197 |
|
|
FITB
5083
Fifth Third Bancorp
FITB
$51.3B
| $27K | ﹤0.01% |
+1,175
| New | +$30.9K |
|
5084
CALL
G-III Apparel Group
GIII
$1.55B
| $27K | ﹤0.01% |
10
-11
| -52% | -$407 |
|
5085
FerroAtlántica
GSM
$600M
| $27K | ﹤0.01% |
17,326
+10,799
| +165% | +$51.7K |
|
5086
Haemonetics
HAE
$3.85B
| $27K | ﹤0.01% |
272
-484
| -64% | -$50.8K |
|
5087
Huntsman Corp
HUN
$2.12B
| $27K | ﹤0.01% |
+1,429
| New | +$30.6K |
|
5088
Kaiser Aluminum
KALU
$2.61B
| $27K | ﹤0.01% |
+313
| New | +$30.2K |
|
5089
PUT
Limoneira
LMNR
$241M
| $27K | ﹤0.01% |
14
-17
| -55% | -$402 |
|
5090
PUT
MidCap Financial Investment
MFIC
$796M
| $27K | ﹤0.01% |
22
+13
| +144% | +$198 |
|
5091
CALL
Quanta Services
PWR
$98.7B
| $27K | ﹤0.01% |
9
-68
| -88% | -$2.2K |
|
5092
PUT
Riot Platforms
RIOT
$8.36B
| $27K | ﹤0.01% |
182
-275
| -60% | -$611 |
|
5093
Sanmina
SANM
$9.83B
| $27K | ﹤0.01% |
1,128
+712
| +171% | +$17.9K |
|
5094
Schneider National
SNDR
$5.98B
| $27K | ﹤0.01% |
1,493
+1,113
| +293% | +$23.9K |
|
|
TPH
5095
CALL
DELISTED
Tri Pointe Homes
TPH
| $27K | ﹤0.01% |
+25
| New | +$296 |
|
5096
Televisa
TV
$1.52B
| $27K | ﹤0.01% |
+2,195
| New | +$32.1K |
|
|
VTLE
5097
CALL
DELISTED
Vital Energy
VTLE
| $27K | ﹤0.01% |
4
-1
| -20% | -$105 |
|
5098
Workiva
WK
$3.29B
| $27K | ﹤0.01% |
769
-8,700
| -92% | -$306K |
|
5099
CALL
Worthington Enterprises
WOR
$2.74B
| $27K | ﹤0.01% |
13
-54
| -81% | -$1.34K |
|
5100
State Street SPDR S&P Semiconductor ETF
XSD
$2.69B
| $27K | ﹤0.01% |
422
+310
| +277% | +$21.1K |
|
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.