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 |
AMC Entertainment Holdings
AMC
|
+$39.3M |
| 2 |
AT&T
T
|
+$29.8M |
| 3 |
NVIDIA
NVDA
|
+$28.3M |
| 4 |
Micron Technology
MU
|
+$22.9M |
| 5 |
Baidu
BIDU
|
+$22.3M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Invesco QQQ Trust
QQQ
|
+$36.1M |
| 2 |
Tesla
TSLA
|
+$35.2M |
| 3 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$25.9M |
| 4 |
Palantir
PLTR
|
+$25.7M |
| 5 |
Wells Fargo
WFC
|
+$20.4M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.47% |
| 2 | Consumer Discretionary | 0.39% |
| 3 | Communication Services | 0.27% |
| 4 | Healthcare | 0.26% |
| 5 | Financials | 0.25% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1101
PUT
AvalonBay Communities
AVB
$27B
| $5.49M | 0.01% |
26,300
+26,018
| +9,226% | +$5.2M |
|
1102
CALL
Yum! Brands
YUM
$40.9B
| $5.49M | 0.01% |
47,700
+47,265
| +10,866% | +$5.57M |
|
|
MMP
1103
CALL
DELISTED
Magellan Midstream Partners, L.P.
MMP
| $5.48M | 0.01% |
112,000
+110,815
| +9,351% | +$5.37M |
|
1104
CALL
Teck Resources
TECK
$29.8B
| $5.48M | 0.01% |
237,700
+233,290
| +5,290% | +$5.31M |
|
1105
CALL
Vanguard Consumer Discretionary ETF
VCR
$5.85B
| $5.47M | 0.01% |
21,600
+21,322
| +7,670% | +$6.54M |
|
|
RETA
1106
PUT
DELISTED
Reata Pharmaceuticals, Inc. Class A Common Stock
RETA
| $5.46M | 0.01% |
38,600
+38,185
| +9,201% | +$4.31M |
|
1107
CALL
Dick's Sporting Goods
DKS
$18.5B
| $5.46M | 0.01% |
54,500
+53,863
| +8,456% | +$4.83M |
|
1108
PUT
Envista
NVST
$4.33B
| $5.46M | 0.01% |
126,300
+126,291
| +1,403,233% | +$5.48M |
|
1109
PUT
New Oriental
EDU
$7.86B
| $5.45M | 0.01% |
66,530
+66,210
| +20,691% | +$8.04M |
|
1110
CALL
AutoNation
AN
$7.01B
| $5.42M | 0.01% |
57,200
+57,111
| +64,170% | +$5.6M |
|
1111
PUT
Gaotu Techedu
GOTU
$377M
| $5.42M | 0.01% |
367,200
+359,289
| +4,542% | +$8.01M |
|
1112
CALL
Genius Sports
GENI
$1.77B
| $5.42M | 0.01% |
+288,500
| New | +$5.72M |
|
1113
Editas Medicine
EDIT
$410M
| $5.41M | 0.01% |
95,453
+16,805
| +21% | +$621K |
|
1114
PUT
Hasbro
HAS
$12.5B
| $5.41M | 0.01% |
57,200
+56,555
| +8,768% | +$5.43M |
|
1115
CALL
Diageo
DEO
$46.2B
| $5.41M | 0.01% |
28,200
+27,878
| +8,658% | +$5.19M |
|
1116
iShares iBoxx $ High Yield Corporate Bond ETF
HYG
$16.3B
| $5.4M | 0.01% |
+61,307
| New | +$5.35M |
|
1117
PUT
HP
HPQ
$23.7B
| $5.39M | 0.01% |
+178,700
| New | +$5.71M |
|
|
AVLR
1118
PUT
DELISTED
Avalara, Inc.
AVLR
| $5.39M | 0.01% |
33,300
+32,986
| +10,505% | +$4.6M |
|
1119
CALL
International Paper
IP
$20.3B
| $5.38M | 0.01% |
92,717
+90,939
| +5,115% | +$5.19M |
|
1120
PUT
Qorvo
QRVO
$7.67B
| $5.38M | 0.01% |
+27,500
| New | +$5.07M |
|
1121
Lam Research
LRCX
$389B
| $5.37M | 0.01% |
82,590
-250,880
| -75% | -$15.8M |
|
1122
CALL
Canadian Pacific Kansas City
CP
$81.8B
| $5.37M | 0.01% |
69,800
+69,445
| +19,562% | +$5.38M |
|
1123
GE Aerospace
GE
$368B
| $5.36M | 0.01% |
79,876
-64,567
| -45% | -$4.31M |
|
|
MNDT
1124
CALL
DELISTED
Mandiant, Inc. Common Stock
MNDT
| $5.35M | 0.01% |
264,800
+263,432
| +19,257% | +$5.4M |
|
1125
PUT
Zoetis
ZTS
$31.5B
| $5.35M | 0.01% |
+28,700
| New | +$4.98M |
|
Similar funds
Simplex Trading's Q2 2021 Portfolio in Review
As of Q2 2021, Simplex Trading held 11,184 positions worth $104B, up 86% from $55.7B the previous quarter. Its ten largest holdings account for 40% of the portfolio.
Simplex Trading deployed $97.5B of net new capital in Q2 2021, opening 2,250 new positions and adding to 6,673 existing holdings. Its largest new stake was AT&T: 1,311,180 shares worth $28.5M.
By sector, the portfolio is most concentrated in Technology at 0.47% of assets, down from 0.65% a quarter earlier, followed by Consumer Discretionary and Communication Services.
On the sell side, the largest reduction was State Street SPDR Dow Jones Industrial Average ETF Trust, an estimated $25.9M trimmed.
- Simplex Trading's largest Q2 2021 buy was AT&T: 1,311,180 shares worth $28.5M.
- Simplex Trading added most to AMC Entertainment Holdings in Q2 2021, an estimated $39.3M increase.
- Simplex Trading's biggest Q2 2021 reduction was State Street SPDR Dow Jones Industrial Average ETF Trust, cutting an estimated $25.9M.
- Simplex Trading fully exited Invesco QQQ Trust in Q2 2021, selling an estimated $36.1M.
- Simplex Trading's ten largest holdings make up 40% of its $104B portfolio in Q2 2021.
- Simplex Trading opened 2,250 new positions and closed 1,197 in Q2 2021.
- Simplex Trading's portfolio value rose 86% quarter-over-quarter to $104B.
Based on Simplex Trading's 13F filing for Q2 2021, filed 12 Aug 2021.