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 | |
|---|---|---|---|---|---|---|
6151
Cato Corp
CATO
$68.3M
| $148K | ﹤0.01% |
8,816
+2,962
| +51% | +$43.8K |
|
6152
PUT
OFG Bancorp
OFG
$2.23B
| $148K | ﹤0.01% |
6,700
+6,680
| +33,400% | +$159K |
|
6153
ProShares Ultra 7-10 Year Treasury
UST
$15.7M
| $148K | ﹤0.01% |
2,174
+2,053
| +1,697% | +$138K |
|
|
GOEV
6154
DELISTED
Canoo Inc. Class A Common Stock
GOEV
| $148K | ﹤0.01% |
+32
| New | +$129K |
|
|
GERM
6155
DELISTED
Amplify Treatments, Testing and Advancements ETF
GERM
| $148K | ﹤0.01% |
3,702
-160
| -4% | -$5.97K |
|
|
KBAL
6156
PUT
DELISTED
Kimball International
KBAL
| $148K | ﹤0.01% |
11,300
+11,249
| +22,057% | +$153K |
|
|
SWI
6157
DELISTED
SolarWinds Corporation Common Stock
SWI
| $148K | ﹤0.01% |
8,325
+2,883
| +53% | +$52.1K |
|
|
AIV
6158
PUT
Aimco
AIV
$387M
| $147K | ﹤0.01% |
23,500
+22,730
| +2,952% | +$156K |
|
6159
CALL
Alector
ALEC
$168M
| $147K | ﹤0.01% |
7,100
+7,064
| +19,622% | +$133K |
|
6160
PUT
Crane NXT
CXT
$2.99B
| $147K | ﹤0.01% |
4,606
+4,571
| +13,060% | +$149K |
|
6161
PUT
Golar LNG
GLNG
$5B
| $147K | ﹤0.01% |
11,100
+10,915
| +5,900% | +$130K |
|
6162
PUT
Immunic
IMUX
$190M
| $147K | ﹤0.01% |
1,200
+1,194
| +19,900% | +$165K |
|
6163
PUT
Magnachip Semiconductor
MX
$119M
| $147K | ﹤0.01% |
6,200
+5,914
| +2,068% | +$145K |
|
6164
PUT
Ouster
OUST
$2.63B
| $147K | ﹤0.01% |
1,180
+1,140
| +2,850% | +$122K |
|
6165
Skillsoft
SKIL
$63.7M
| $147K | ﹤0.01% |
750
-1,138
| -60% | -$228K |
|
6166
CALL
Cambria Tail Risk ETF
TAIL
$147M
| $147K | ﹤0.01% |
7,900
+7,897
| +263,233% | +$148K |
|
6167
CALL
TriplePoint Venture Growth BDC
TPVG
$184M
| $147K | ﹤0.01% |
9,700
+9,665
| +27,614% | +$149K |
|
6168
CALL
Trustmark
TRMK
$2.76B
| $147K | ﹤0.01% |
4,800
+4,749
| +9,312% | +$157K |
|
6169
CALL
Voya Financial
VOYA
$9.01B
| $147K | ﹤0.01% |
2,400
+2,322
| +2,977% | +$153K |
|
|
VER
6170
CALL
DELISTED
VEREIT, Inc.
VER
| $147K | ﹤0.01% |
5,600
+5,321
| +1,907% | +$241K |
|
6171
PUT
Bakkt Inc
BKKT
$321M
| $146K | ﹤0.01% |
584
+576
| +7,200% | +$158K |
|
6172
CALL
United States Brent Oil Fund
BNO
$781M
| $146K | ﹤0.01% |
7,600
+7,571
| +26,107% | +$133K |
|
6173
Compañía de Minas Buenaventura
BVN
$7.69B
| $146K | ﹤0.01% |
16,196
+10,741
| +197% | +$113K |
|
6174
Lineage Cell Therapeutics
LCTX
$269M
| $146K | ﹤0.01% |
51,383
-20,227
| -28% | -$52.3K |
|
6175
CALL
Murphy USA
MUSA
$11.2B
| $146K | ﹤0.01% |
1,100
+1,099
| +109,900% | +$152K |
|
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.