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 | |
|---|---|---|---|---|---|---|
1501
CALL
Lear
LEA
$7.23B
| $1.49M | ﹤0.01% |
103
+19
| +23% | +$3.25K |
|
1502
Sherwin-Williams
SHW
$78.3B
| $1.49M | ﹤0.01% |
9,834
+7,011
| +248% | +$1.04M |
|
1503
PUT
Ollie's Bargain Outlet
OLLI
$3.99B
| $1.49M | ﹤0.01% |
155
+44
| +40% | +$3.51K |
|
1504
CALL
Protolabs
PRLB
$1.89B
| $1.49M | ﹤0.01% |
92
-12
| -12% | -$1.7K |
|
1505
CALL
AptarGroup
ATR
$8.4B
| $1.49M | ﹤0.01% |
138
-178
| -56% | -$18.3K |
|
|
LOXO
1506
CALL
DELISTED
Loxo Oncology, Inc
LOXO
| $1.49M | ﹤0.01% |
87
-29
| -25% | -$4.87K |
|
1507
CALL
PPG Industries
PPG
$25.9B
| $1.48M | ﹤0.01% |
136
+75
| +123% | +$8.18K |
|
1508
CALL
Roper Technologies
ROP
$36.2B
| $1.48M | ﹤0.01% |
50
+10
| +25% | +$2.95K |
|
1509
PUT
RLJ Lodging Trust
RLJ
$1.9B
| $1.48M | ﹤0.01% |
672
+26
| +4% | +$578 |
|
|
DVAX
1510
PUT
DELISTED
Dynavax Technologies
DVAX
| $1.47M | ﹤0.01% |
1,189
+1,123
| +1,702% | +$15.2K |
|
1511
CALL
Oneok
OKE
$59.2B
| $1.47M | ﹤0.01% |
217
-397
| -65% | -$27.2K |
|
|
MDCO
1512
CALL
DELISTED
Medicines Co
MDCO
| $1.47M | ﹤0.01% |
492
+200
| +68% | +$7.54K |
|
|
SONC
1513
PUT
DELISTED
Sonic Corp
SONC
| $1.47M | ﹤0.01% |
339
+233
| +220% | +$8.38K |
|
|
ZUO
1514
CALL
DELISTED
Zuora, Inc.
ZUO
| $1.47M | ﹤0.01% |
635
+538
| +555% | +$14.3K |
|
1515
PUT
Littelfuse
LFUS
$10.4B
| $1.46M | ﹤0.01% |
74
+35
| +90% | +$7.7K |
|
1516
PUT
SolarEdge
SEDG
$2.62B
| $1.46M | ﹤0.01% |
389
-217
| -36% | -$10.4K |
|
1517
PUT
Raymond James Financial
RJF
$32.4B
| $1.46M | ﹤0.01% |
239
+135
| +130% | +$8.32K |
|
1518
PUT
Trane Technologies
TT
$107B
| $1.46M | ﹤0.01% |
143
-6
| -4% | -$587 |
|
1519
PUT
Sensata Technologies
ST
$6.7B
| $1.46M | ﹤0.01% |
295
+279
| +1,744% | +$14.6K |
|
1520
CALL
MasTec
MTZ
$27.5B
| $1.46M | ﹤0.01% |
327
+316
| +2,873% | +$14.6K |
|
1521
PUT
Tyson Foods
TSN
$20.1B
| $1.46M | ﹤0.01% |
245
-28
| -10% | -$1.75K |
|
1522
PUT
Vail Resorts
MTN
$5.29B
| $1.45M | ﹤0.01% |
53
-7
| -12% | -$2.02K |
|
|
CYBR
1523
CALL
DELISTED
CyberArk
CYBR
| $1.45M | ﹤0.01% |
182
+86
| +90% | +$6.04K |
|
|
ICPT
1524
DELISTED
Intercept Pharmaceuticals, Inc.
ICPT
| $1.45M | ﹤0.01% |
11,502
+5,299
| +85% | +$561K |
|
|
JAG
1525
CALL
DELISTED
Jagged Peak Energy Inc.
JAG
| $1.45M | ﹤0.01% |
1,048
+529
| +102% | +$7.17K |
|
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.