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 | |
|---|---|---|---|---|---|---|
2026
DexCom
DXCM
$27.6B
| $874K | ﹤0.01% |
+24,444
| New | +$758K |
|
2027
PUT
Precigen
PGEN
$1.93B
| $874K | ﹤0.01% |
508
+179
| +54% | +$2.66K |
|
|
TLRD
2028
CALL
DELISTED
Tailored Brands, Inc.
TLRD
| $874K | ﹤0.01% |
347
-45
| -11% | -$1.03K |
|
2029
CALL
Bread Financial
BFH
$4.21B
| $873K | ﹤0.01% |
46
+26
| +130% | +$4.9K |
|
2030
Chegg
CHGG
$108M
| $873K | ﹤0.01% |
30,718
+22,107
| +257% | +$659K |
|
2031
CALL
Melco Resorts & Entertainment
MLCO
$2.1B
| $873K | ﹤0.01% |
413
-157
| -28% | -$3.65K |
|
2032
ScottsMiracle-Gro
SMG
$4.03B
| $872K | ﹤0.01% |
11,081
+6,319
| +133% | +$497K |
|
2033
PUT
American Electric Power
AEP
$73.7B
| $871K | ﹤0.01% |
123
+76
| +162% | +$5.41K |
|
|
ZUO
2034
PUT
DELISTED
Zuora, Inc.
ZUO
| $871K | ﹤0.01% |
377
-360
| -49% | -$9.6K |
|
2035
Pembina Pipeline
PBA
$29.9B
| $870K | ﹤0.01% |
25,621
+22,776
| +801% | +$791K |
|
2036
CALL
Allstate
ALL
$66.9B
| $868K | ﹤0.01% |
88
+13
| +17% | +$1.27K |
|
|
RDUS
2037
DELISTED
Radius Health, Inc.
RDUS
| $867K | ﹤0.01% |
48,746
+28,917
| +146% | +$654K |
|
2038
IQVIA
IQV
$34.7B
| $865K | ﹤0.01% |
6,671
+775
| +13% | +$93.1K |
|
|
AVTA
2039
PUT
DELISTED
Avantax, Inc. Common Stock
AVTA
| $865K | ﹤0.01% |
215
+16
| +8% | +$583 |
|
|
CY
2040
PUT
DELISTED
Cypress Semiconductor
CY
| $865K | ﹤0.01% |
597
+365
| +157% | +$6.01K |
|
|
GRA
2041
PUT
DELISTED
W.R. Grace & Co.
GRA
| $864K | ﹤0.01% |
121
+101
| +505% | +$7.28K |
|
|
UFS
2042
DELISTED
DOMTAR CORPORATION (New)
UFS
| $863K | ﹤0.01% |
16,546
+497
| +3% | +$25K |
|
2043
CALL
Cedar Fair
FUN
$1.78B
| $859K | ﹤0.01% |
165
+160
| +3,200% | +$8.85K |
|
|
AXDX
2044
PUT
DELISTED
Accelerate Diagnostics
AXDX
| $858K | ﹤0.01% |
37
+31
| +517% | +$6.85K |
|
2045
PUT
NN Inc
NNBR
$272M
| $858K | ﹤0.01% |
550
+544
| +9,067% | +$10.2K |
|
2046
CALL
Invesco DB Base Metals Fund
DBB
$306M
| $857K | ﹤0.01% |
514
+26
| +5% | +$425 |
|
|
BEAT
2047
CALL
DELISTED
BioTelemetry, Inc.
BEAT
| $857K | ﹤0.01% |
133
-163
| -55% | -$9.1K |
|
2048
PUT
Aramark
ARMK
$15B
| $856K | ﹤0.01% |
276
+77
| +39% | +$2.25K |
|
|
SCIU
2049
CALL
DELISTED
Global X Scientific Beta US ETF
SCIU
| $854K | ﹤0.01% |
360
-236
| -40% | -$7.71K |
|
2050
PUT
LCI Industries
LCII
$2.51B
| $852K | ﹤0.01% |
103
+63
| +158% | +$5.89K |
|
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.