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 |
Invesco QQQ Trust
QQQ
|
+$86.9M |
| 2 |
Walt Disney
DIS
|
+$25.5M |
| 3 |
Baidu
BIDU
|
+$12.3M |
| 4 |
Alphabet (Google) Class A
GOOGL
|
+$12.3M |
| 5 |
RHT
Red Hat Inc
RHT
|
+$11.4M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Amazon
AMZN
|
+$66M |
| 2 |
iShares Russell 2000 ETF
IWM
|
+$60.3M |
| 3 |
Alphabet (Google) Class C
GOOG
|
+$33.9M |
| 4 |
Apple
AAPL
|
+$21.1M |
| 5 |
State Street Financial Select Sector SPDR ETF
XLF
|
+$18.2M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Communication Services | 0.58% |
| 2 | Technology | 0.42% |
| 3 | Healthcare | 0.34% |
| 4 | Consumer Discretionary | 0.29% |
| 5 | Industrials | 0.21% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
2651
PUT
Stewart Information Services
STC
$2.05B
| $508K | ﹤0.01% |
119
+99
| +495% | +$4.25K |
|
2652
CALL
Titan International
TWI
$516M
| $508K | ﹤0.01% |
+852
| New | +$4.8K |
|
2653
CALL
Beazer Homes USA
BZH
$907M
| $507K | ﹤0.01% |
441
+417
| +1,738% | +$4.99K |
|
|
UFS
2654
PUT
DELISTED
DOMTAR CORPORATION (New)
UFS
| $506K | ﹤0.01% |
102
+93
| +1,033% | +$4.42K |
|
2655
CALL
Brink's
BCO
$5.02B
| $505K | ﹤0.01% |
67
+63
| +1,575% | +$4.68K |
|
2656
Caesarstone
CSTE
$72.3M
| $504K | ﹤0.01% |
32,295
-46,176
| -59% | -$723K |
|
2657
CALL
Bank OZK
OZK
$5.49B
| $504K | ﹤0.01% |
174
+94
| +118% | +$2.85K |
|
|
ASXC
2658
CALL
DELISTED
Asensus Surgical, Inc.
ASXC
| $504K | ﹤0.01% |
163
+45
| +38% | +$1.51K |
|
|
TCP
2659
CALL
DELISTED
TC Pipelines LP
TCP
| $504K | ﹤0.01% |
135
+46
| +52% | +$1.54K |
|
2660
PUT
Fortive
FTV
$19B
| $503K | ﹤0.01% |
95
+74
| +352% | +$3.6K |
|
|
DNKN
2661
PUT
DELISTED
Dunkin' Brands Group, Inc.
DNKN
| $503K | ﹤0.01% |
67
+2
| +3% | +$140 |
|
|
APU
2662
CALL
DELISTED
AmeriGas Partners, L.P.
APU
| $503K | ﹤0.01% |
163
-19
| -10% | -$556 |
|
2663
BGC Group
BGC
$5.58B
| $502K | ﹤0.01% |
94,667
+50,202
| +113% | +$299K |
|
2664
PUT
Invesco Equal Weight 0-30 Year Treasury ETF
GOVI
$1.22B
| $502K | ﹤0.01% |
100
+75
| +300% | +$2.4K |
|
2665
CALL
Warrior Met Coal
HCC
$4.23B
| $501K | ﹤0.01% |
+165
| New | +$4.51K |
|
2666
Crown Castle
CCI
$32.7B
| $499K | ﹤0.01% |
3,899
+1,023
| +36% | +$120K |
|
2667
Enovis
ENOV
$1.56B
| $499K | ﹤0.01% |
+9,781
| New | +$429K |
|
2668
CALL
Essent Group
ESNT
$6.06B
| $499K | ﹤0.01% |
+115
| New | +$4.74K |
|
2669
PUT
Polaris
PII
$4.15B
| $498K | ﹤0.01% |
59
-18
| -23% | -$1.53K |
|
2670
PUT
Tenaris
TS
$29.1B
| $497K | ﹤0.01% |
176
+170
| +2,833% | +$4.39K |
|
2671
CALL
Bilibili
BILI
$7.18B
| $496K | ﹤0.01% |
262
+89
| +51% | +$1.56K |
|
2672
PUT
Everest Group
EG
$15.2B
| $496K | ﹤0.01% |
+23
| New | +$5.01K |
|
2673
CALL
Qualys
QLYS
$4.84B
| $496K | ﹤0.01% |
60
+49
| +445% | +$4.08K |
|
|
CORR
2674
CALL
DELISTED
CorEnergy Infrastructure Trust, Inc.
CORR
| $496K | ﹤0.01% |
135
+130
| +2,600% | +$4.68K |
|
|
PVTL
2675
PUT
DELISTED
Pivotal Software, Inc.
PVTL
| $496K | ﹤0.01% |
238
+196
| +467% | +$3.83K |
|
Similar funds
Simplex Trading's Q1 2019 Portfolio in Review
As of Q1 2019, Simplex Trading held 8,479 positions worth $36B, up 5.5% from $34.1B the previous quarter. Its ten largest holdings account for 35% of the portfolio.
Simplex Trading's Q1 2019 filing shows 1,472 new, 3,049 increased, 2,419 reduced and 1,324 closed positions. Its largest new stake was Walt Disney: 228,471 shares worth $25.4M. The largest sale was Amazon, an estimated $66M.
By sector, the portfolio is most concentrated in Communication Services at 0.58% of assets, up from 0.49% a quarter earlier, followed by Technology and Healthcare.
- Simplex Trading's largest Q1 2019 buy was Walt Disney: 228,471 shares worth $25.4M.
- Simplex Trading added most to Invesco QQQ Trust in Q1 2019, an estimated $86.9M increase.
- Simplex Trading's biggest Q1 2019 reduction was iShares Russell 2000 ETF, cutting an estimated $60.3M.
- Simplex Trading fully exited Amazon in Q1 2019, selling an estimated $66M.
- Simplex Trading's ten largest holdings make up 35% of its $36B portfolio in Q1 2019.
- Simplex Trading opened 1,472 new positions and closed 1,324 in Q1 2019.
- Simplex Trading's portfolio value rose 5.5% quarter-over-quarter to $36B.
Based on Simplex Trading's 13F filing for Q1 2019, filed 18 Apr 2019.