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 | |
|---|---|---|---|---|---|---|
2201
CALL
Goodyear
GT
$2.07B
| $1.94M | ﹤0.01% |
113,000
+111,018
| +5,601% | +$2.05M |
|
|
PMT
2202
CALL
PennyMac Mortgage Investment
PMT
$849M
| $1.94M | ﹤0.01% |
92,000
+90,737
| +7,184% | +$1.81M |
|
2203
CALL
Protolabs
PRLB
$1.86B
| $1.94M | ﹤0.01% |
21,100
+20,982
| +17,781% | +$2.07M |
|
2204
CALL
Ametek
AME
$55.5B
| $1.94M | ﹤0.01% |
14,500
+14,440
| +24,067% | +$1.93M |
|
|
TPGY
2205
DELISTED
TPG Pace Beneficial Finance Corp.
TPGY
| $1.93M | ﹤0.01% |
+150,291
| New | +$2.18M |
|
|
FITB
2206
CALL
Fifth Third Bancorp
FITB
$52B
| $1.93M | ﹤0.01% |
50,500
+49,939
| +8,902% | +$2M |
|
2207
PUT
LPL Financial
LPLA
$26.3B
| $1.93M | ﹤0.01% |
14,300
+14,205
| +14,953% | +$2.07M |
|
2208
CALL
Halozyme
HALO
$9.72B
| $1.93M | ﹤0.01% |
+42,500
| New | +$1.88M |
|
2209
CALL
SelectQuote
SLQT
$114M
| $1.93M | ﹤0.01% |
100,200
+98,370
| +5,375% | +$2.45M |
|
2210
CALL
Annaly Capital Management
NLY
$16.9B
| $1.93M | ﹤0.01% |
54,300
+53,928
| +14,497% | +$1.96M |
|
2211
Thomson Reuters
TRI
$39.4B
| $1.93M | ﹤0.01% |
18,422
-3,934
| -18% | -$394K |
|
2212
PUT
American Superconductor
AMSC
$1.48B
| $1.92M | ﹤0.01% |
110,600
+110,395
| +53,851% | +$1.77M |
|
2213
PUT
Manchester United
MANU
$3.91B
| $1.92M | ﹤0.01% |
126,600
+126,459
| +89,687% | +$2.03M |
|
2214
CALL
Atomera
ATOM
$201M
| $1.92M | ﹤0.01% |
89,600
+89,058
| +16,431% | +$1.83M |
|
2215
PUT
Hecla Mining
HL
$10.2B
| $1.92M | ﹤0.01% |
258,000
+255,293
| +9,431% | +$1.92M |
|
2216
CALL
Kodak
KODK
$806M
| $1.92M | ﹤0.01% |
+230,400
| New | +$1.81M |
|
|
SRNE
2217
PUT
DELISTED
Sorrento Therapeutics, Inc.
SRNE
| $1.92M | ﹤0.01% |
+197,800
| New | +$1.58M |
|
2218
ARK Autonomous Technology & Robotics ETF
ARKQ
$1.88B
| $1.92M | ﹤0.01% |
22,223
+4,500
| +25% | +$370K |
|
2219
CALL
FMC
FMC
$1.42B
| $1.92M | ﹤0.01% |
17,700
+17,531
| +10,373% | +$2.03M |
|
|
IRBT
2220
CALL
DELISTED
iRobot
IRBT
| $1.91M | ﹤0.01% |
+20,500
| New | +$2.1M |
|
|
PPL
2221
PUT
PPL Corp
PPL
$27.3B
| $1.91M | ﹤0.01% |
68,400
+68,030
| +18,386% | +$1.97M |
|
|
JNPR
2222
PUT
DELISTED
Juniper Networks
JNPR
| $1.91M | ﹤0.01% |
69,800
+69,006
| +8,691% | +$1.84M |
|
2223
CALL
LivePerson
LPSN
$18.9M
| $1.91M | ﹤0.01% |
2,013
+2,002
| +18,200% | +$1.69M |
|
|
FRC
2224
CALL
DELISTED
First Republic Bank
FRC
| $1.91M | ﹤0.01% |
10,200
+10,053
| +6,839% | +$1.85M |
|
|
LKFT
2225
CALL
Lakefront Biotherapeutics American Depositary Shares
LKFT
$1.82B
| $1.91M | ﹤0.01% |
27,700
+27,471
| +11,996% | +$2.1M |
|
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.