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 |
Amazon
AMZN
|
+$148M |
| 2 |
Invesco QQQ Trust
QQQ
|
+$67.3M |
| 3 |
Meta Platforms (Facebook)
META
|
+$63.2M |
| 4 |
Goldman Sachs
GS
|
+$23.9M |
| 5 |
Citigroup
C
|
+$23.1M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Berkshire Hathaway Class B
BRK.B
|
+$47.5M |
| 2 |
Apple
AAPL
|
+$46M |
| 3 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$44.5M |
| 4 |
Micron Technology
MU
|
+$29.1M |
| 5 |
Adobe
ADBE
|
+$22.2M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Consumer Discretionary | 1.13% |
| 2 | Communication Services | 0.89% |
| 3 | Technology | 0.68% |
| 4 | Industrials | 0.51% |
| 5 | Healthcare | 0.44% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
2651
PUT
National Healthcare
NHC
$3.53B
| $489K | ﹤0.01% |
65
+2
| +3% | +$147 |
|
|
NUAN
2652
CALL
DELISTED
Nuance Communications, Inc.
NUAN
| $488K | ﹤0.01% |
326
-449
| -58% | -$6.22K |
|
2653
PUT
National Grid
NGG
$82.7B
| $487K | ﹤0.01% |
106
+89
| +524% | +$4.23K |
|
2654
CALL
Rapid7
RPD
$634M
| $487K | ﹤0.01% |
132
+113
| +595% | +$3.79K |
|
|
PTE
2655
PUT
DELISTED
PolarityTE, Inc. Common Stock
PTE
| $487K | ﹤0.01% |
10
+9
| +900% | +$5.19K |
|
2656
Addus HomeCare
ADUS
$2.14B
| $486K | ﹤0.01% |
6,939
+6,839
| +6,839% | +$443K |
|
|
EMBJ
2657
Embraer S.A. ADS
EMBJ
$11.6B
| $486K | ﹤0.01% |
24,832
-5,167
| -17% | -$105K |
|
2658
iShares US Technology ETF
IYW
$23.7B
| $486K | ﹤0.01% |
10,024
+3,436
| +52% | +$162K |
|
2659
CALL
TherapeuticsMD
TXMD
$23.8M
| $485K | ﹤0.01% |
15
+10
| +200% | +$3.06K |
|
2660
PUT
Universal Insurance Holdings
UVE
$1.16B
| $485K | ﹤0.01% |
100
+70
| +233% | +$3.01K |
|
|
QEP
2661
DELISTED
QEP RESOURCES, INC.
QEP
| $485K | ﹤0.01% |
+42,851
| New | +$462K |
|
2662
PUT
Global Payments
GPN
$22.1B
| $484K | ﹤0.01% |
38
-82
| -68% | -$9.86K |
|
2663
CALL
Magnolia Oil & Gas
MGY
$5.83B
| $484K | ﹤0.01% |
+323
| New | +$4.22K |
|
2664
CALL
Qiagen
QGEN
$8.53B
| $484K | ﹤0.01% |
+121
| New | +$4.83K |
|
2665
Carlyle Group
CG
$16.3B
| $483K | ﹤0.01% |
+21,453
| New | +$505K |
|
2666
CALL
Tronox
TROX
$995M
| $482K | ﹤0.01% |
404
+245
| +154% | +$4.02K |
|
|
SBNY
2667
CALL
DELISTED
Signature Bank
SBNY
| $482K | ﹤0.01% |
42
+17
| +68% | +$2K |
|
2668
CALL
Aramark
ARMK
$15B
| $481K | ﹤0.01% |
155
-481
| -76% | -$14K |
|
2669
PUT
Bruker
BRKR
$9.2B
| $481K | ﹤0.01% |
144
+123
| +586% | +$4.05K |
|
2670
PUT
LKQ Corp
LKQ
$6.58B
| $481K | ﹤0.01% |
152
+8
| +6% | +$266 |
|
2671
PUT
Alliant Energy
LNT
$19.4B
| $481K | ﹤0.01% |
113
+103
| +1,030% | +$4.42K |
|
2672
CALL
Funko
FNKO
$323M
| $480K | ﹤0.01% |
203
+169
| +497% | +$3.4K |
|
2673
PUT
US Bancorp Series B Preferred Stock
USB.PRH
$746M
| $480K | ﹤0.01% |
91
-61
| -40% | -$1.43K |
|
2674
CALL
CACI
CACI
$10.8B
| $478K | ﹤0.01% |
26
-103
| -80% | -$19K |
|
2675
CALL
Compass Minerals
CMP
$1.24B
| $477K | ﹤0.01% |
71
+60
| +545% | +$3.91K |
|
Similar funds
Simplex Trading's Q3 2018 Portfolio in Review
As of Q3 2018, Simplex Trading held 8,699 positions worth $31.1B, up 22% from $25.5B the previous quarter. Its ten largest holdings account for 34% of the portfolio.
Simplex Trading's Q3 2018 filing shows 1,336 new, 3,066 increased, 2,755 reduced and 1,315 closed positions. Its largest new stake was Invesco QQQ Trust: 371,806 shares worth $69.1M. The largest sale was Berkshire Hathaway Class B, an estimated $47.5M.
By sector, the portfolio is most concentrated in Consumer Discretionary at 1.1% of assets, up from 0.92% a quarter earlier, followed by Communication Services and Technology.
- Simplex Trading's largest Q3 2018 buy was Invesco QQQ Trust: 371,806 shares worth $69.1M.
- Simplex Trading added most to Amazon in Q3 2018, an estimated $148M increase.
- Simplex Trading's biggest Q3 2018 reduction was Apple, cutting an estimated $46M.
- Simplex Trading fully exited Berkshire Hathaway Class B in Q3 2018, selling an estimated $47.5M.
- Simplex Trading's ten largest holdings make up 34% of its $31.1B portfolio in Q3 2018.
- Simplex Trading opened 1,336 new positions and closed 1,315 in Q3 2018.
- Simplex Trading's portfolio value rose 22% quarter-over-quarter to $31.1B.
Based on Simplex Trading's 13F filing for Q3 2018, filed 23 Oct 2018.