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 | |
|---|---|---|---|---|---|---|
1926
PUT
Inseego
INSG
$108M
| $2.4M | ﹤0.01% |
+23,790
| New | +$2.18M |
|
1927
CALL
Fortive
FTV
$19B
| $2.4M | ﹤0.01% |
45,649
+45,223
| +10,616% | +$2.44M |
|
1928
CALL
Vanguard Dividend Appreciation ETF
VIG
$111B
| $2.4M | ﹤0.01% |
15,500
+15,420
| +19,275% | +$2.37M |
|
1929
United Parks & Resorts
PRKS
$2.11B
| $2.4M | ﹤0.01% |
+48,045
| New | +$2.55M |
|
1930
Pultegroup
PHM
$24.5B
| $2.4M | ﹤0.01% |
43,948
+5,461
| +14% | +$305K |
|
|
SUM
1931
CALL
DELISTED
Summit Materials, Inc. Class A Common Stock
SUM
| $2.4M | ﹤0.01% |
+69,970
| New | +$2.21M |
|
1932
PUT
Wendy's
WEN
$1.33B
| $2.4M | ﹤0.01% |
102,300
+101,928
| +27,400% | +$2.34M |
|
1933
CALL
Bank OZK
OZK
$5.49B
| $2.39M | ﹤0.01% |
56,800
+56,283
| +10,886% | +$2.35M |
|
1934
CALL
Williams-Sonoma
WSM
$26.7B
| $2.39M | ﹤0.01% |
+30,000
| New | +$2.55M |
|
|
NVTA
1935
CALL
DELISTED
Invitae Corporation
NVTA
| $2.39M | ﹤0.01% |
71,000
+69,705
| +5,383% | +$2.27M |
|
1936
CRISPR Therapeutics
CRSP
$4.58B
| $2.39M | ﹤0.01% |
14,774
+12,794
| +646% | +$1.56M |
|
1937
PUT
Invesco Mortgage Capital
IVR
$776M
| $2.39M | ﹤0.01% |
61,310
+60,582
| +8,322% | +$2.3M |
|
1938
Cedar Fair
FUN
$1.78B
| $2.39M | ﹤0.01% |
53,329
+16,886
| +46% | +$800K |
|
1939
CALL
XP
XP
$8.62B
| $2.39M | ﹤0.01% |
54,900
+54,649
| +21,773% | +$2.26M |
|
1940
NovoCure
NVCR
$2.04B
| $2.38M | ﹤0.01% |
10,748
+2,488
| +30% | +$484K |
|
1941
PUT
Ross Stores
ROST
$76.6B
| $2.38M | ﹤0.01% |
19,200
+18,950
| +7,580% | +$2.36M |
|
|
HAAC
1942
CALL
DELISTED
Health Assurance Acquisition Corp. Class A Common Stock
HAAC
| $2.38M | ﹤0.01% |
237,800
+237,703
| +245,055% | +$2.43M |
|
1943
CALL
Senseonics Holdings Inc
SENS
$254M
| $2.38M | ﹤0.01% |
30,955
+30,732
| +13,781% | +$1.56M |
|
|
P
1944
CALL
Everpure Inc
P
$24.8B
| $2.38M | ﹤0.01% |
121,700
+119,816
| +6,360% | +$2.36M |
|
|
CAN
1945
CALL
Canaan Creative
CAN
$176M
| $2.38M | ﹤0.01% |
+291,500
| New | +$3.31M |
|
1946
PUT
TC Energy
TRP
$73.5B
| $2.37M | ﹤0.01% |
47,950
+47,038
| +5,158% | +$2.35M |
|
1947
Advanced Micro Devices
AMD
$851B
| $2.37M | ﹤0.01% |
+25,265
| New | +$2.04M |
|
|
CAI
1948
PUT
DELISTED
CAI International, Inc.
CAI
| $2.37M | ﹤0.01% |
42,300
+42,165
| +31,233% | +$1.87M |
|
1949
PUT
Vornado Realty Trust
VNO
$7.47B
| $2.37M | ﹤0.01% |
50,700
+50,408
| +17,263% | +$2.36M |
|
1950
PUT
W.W. Grainger
GWW
$65.3B
| $2.37M | ﹤0.01% |
5,400
+5,355
| +11,900% | +$2.36M |
|
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.