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 | |
|---|---|---|---|---|---|---|
1501
Gilead Sciences
GILD
$161B
| $1.18M | ﹤0.01% |
18,876
+1,476
| +8% | +$103K |
|
1502
PUT
Aon
AON
$77.3B
| $1.18M | ﹤0.01% |
81
+51
| +170% | +$7.92K |
|
1503
Chevron
CVX
$388B
| $1.18M | ﹤0.01% |
10,804
+3,397
| +46% | +$394K |
|
1504
PUT
Toyota
TM
$210B
| $1.17M | ﹤0.01% |
101
+95
| +1,583% | +$11.3K |
|
|
HEP
1505
PUT
DELISTED
Holly Energy Partners, L.P.
HEP
| $1.17M | ﹤0.01% |
410
+332
| +426% | +$9.81K |
|
|
NAV
1506
PUT
DELISTED
Navistar International
NAV
| $1.17M | ﹤0.01% |
451
-38
| -8% | -$1.19K |
|
1507
PUT
Prologis
PLD
$138B
| $1.17M | ﹤0.01% |
199
+108
| +119% | +$7K |
|
|
PARA
1508
DELISTED
Paramount Global Class B
PARA
| $1.17M | ﹤0.01% |
+26,693
| New | +$1.42M |
|
1509
CALL
Rapid7
RPD
$634M
| $1.17M | ﹤0.01% |
374
+242
| +183% | +$7.92K |
|
|
UNIT
1510
PUT
Uniti Group
UNIT
$2.63B
| $1.16M | ﹤0.01% |
748
+112
| +18% | +$2.11K |
|
|
ARRY
1511
CALL
DELISTED
Array Biopharma Inc
ARRY
| $1.16M | ﹤0.01% |
817
-176
| -18% | -$2.67K |
|
1512
CALL
Dover
DOV
$27.2B
| $1.16M | ﹤0.01% |
164
+130
| +382% | +$10.6K |
|
1513
CALL
National Beverage
FIZZ
$2.87B
| $1.16M | ﹤0.01% |
324
-422
| -57% | -$19.4K |
|
1514
PUT
FMC
FMC
$1.42B
| $1.16M | ﹤0.01% |
181
+93
| +106% | +$6.52K |
|
1515
CALL
First Trust Natural Gas ETF
FCG
$632M
| $1.16M | ﹤0.01% |
199
-50
| -20% | -$950 |
|
1516
PUT
Linde
LIN
$237B
| $1.15M | ﹤0.01% |
+74
| New | +$11.7K |
|
|
SNV
1517
PUT
DELISTED
Synovus
SNV
| $1.15M | ﹤0.01% |
361
+242
| +203% | +$9.13K |
|
1518
Lowe's Companies
LOW
$116B
| $1.15M | ﹤0.01% |
+12,490
| New | +$1.2M |
|
|
GRMN
1519
PUT
Garmin
GRMN
$46.9B
| $1.15M | ﹤0.01% |
182
-192
| -51% | -$12.4K |
|
1520
CALL
Aramark
ARMK
$15B
| $1.15M | ﹤0.01% |
548
+393
| +254% | +$10.2K |
|
1521
CALL
Service Corp International
SCI
$11.4B
| $1.15M | ﹤0.01% |
285
+102
| +56% | +$4.43K |
|
1522
CALL
Gentherm
THRM
$1.31B
| $1.15M | ﹤0.01% |
+287
| New | +$12.1K |
|
|
FRC
1523
PUT
DELISTED
First Republic Bank
FRC
| $1.15M | ﹤0.01% |
132
+6
| +5% | +$548 |
|
1524
CALL
Teladoc Health
TDOC
$1.58B
| $1.15M | ﹤0.01% |
231
-38
| -14% | -$2.33K |
|
1525
PUT
L3Harris
LHX
$55.9B
| $1.14M | ﹤0.01% |
85
+27
| +47% | +$4.08K |
|
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.