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 | |
|---|---|---|---|---|---|---|
|
GNRS
2226
CALL
DELISTED
Greenrose Acquisition Corp. Common Stock
GNRS
| $1.91M | ﹤0.01% |
190,900
+189,957
| +20,144% | +$1.9M |
|
2227
PNC Financial Services
PNC
$100B
| $1.91M | ﹤0.01% |
+9,994
| New | +$1.88M |
|
2228
McKesson
MCK
$98.5B
| $1.91M | ﹤0.01% |
9,964
+8,003
| +408% | +$1.55M |
|
|
VLDR
2229
CALL
DELISTED
Velodyne Lidar, Inc. Common Stock
VLDR
| $1.9M | ﹤0.01% |
179,000
+177,873
| +15,783% | +$2.1M |
|
2230
PUT
Lakeland Industries
LAKE
$106M
| $1.9M | ﹤0.01% |
85,200
+84,463
| +11,460% | +$2.18M |
|
2231
PUT
OneSpan
OSPN
$562M
| $1.9M | ﹤0.01% |
74,500
+74,499
| +7,449,900% | +$1.95M |
|
2232
PUT
Sun Life Financial
SLF
$45.6B
| $1.9M | ﹤0.01% |
36,900
+36,262
| +5,684% | +$1.92M |
|
2233
PUT
MarketAxess Holdings
MKTX
$4.15B
| $1.9M | ﹤0.01% |
4,100
+4,001
| +4,041% | +$1.9M |
|
|
KSU
2234
PUT
DELISTED
Kansas City Southern
KSU
| $1.9M | ﹤0.01% |
+6,700
| New | +$1.93M |
|
2235
iShares JPMorgan USD Emerging Markets Bond ETF
EMB
$14.9B
| $1.9M | ﹤0.01% |
16,857
+16,657
| +8,329% | +$1.85M |
|
2236
CALL
Gerdau
GGB
$9.44B
| $1.89M | ﹤0.01% |
404,586
+403,250
| +30,183% | +$1.97M |
|
2237
CALL
Weibo
WB
$1.9B
| $1.89M | ﹤0.01% |
+36,000
| New | +$1.78M |
|
|
NCTY
2238
CALL
The9 Ltd
NCTY
$49M
| $1.89M | ﹤0.01% |
13,280
+13,225
| +24,045% | +$2.4M |
|
|
BGFV
2239
PUT
DELISTED
Big 5 Sporting Goods
BGFV
| $1.89M | ﹤0.01% |
+73,700
| New | +$1.81M |
|
2240
PUT
Tanger
SKT
$4.82B
| $1.89M | ﹤0.01% |
+100,400
| New | +$1.76M |
|
|
QVCGA
2241
PUT
DELISTED
QVC Group Inc Series A
QVCGA
| $1.89M | ﹤0.01% |
8,378
+8,287
| +9,107% | +$5.32M |
|
|
CVM.WS
2242
CALL
DELISTED
Cel-Sci Corp Series S
CVM.WS
| $1.89M | ﹤0.01% |
217,800
+217,242
| +38,932% | +$1.89M |
|
|
JJT
2243
CALL
DELISTED
iPath Series B Bloomberg Tin Subindex Total ReturnSM ETN
JJT
| $1.89M | ﹤0.01% |
46,200
+12,296
| +36% | +$1.02M |
|
2244
PUT
Charles River Laboratories
CRL
$10.9B
| $1.89M | ﹤0.01% |
5,100
+5,030
| +7,186% | +$1.68M |
|
2245
PUT
Qfin Holdings
QFIN
$1.61B
| $1.89M | ﹤0.01% |
45,100
+44,470
| +7,059% | +$1.35M |
|
|
CEQP
2246
CALL
DELISTED
Crestwood Equity Partners LP
CEQP
| $1.89M | ﹤0.01% |
62,900
+62,817
| +75,683% | +$1.87M |
|
2247
PUT
8x8 Inc
EGHT
$247M
| $1.88M | ﹤0.01% |
67,900
+67,458
| +15,262% | +$1.91M |
|
2248
Vertex Pharmaceuticals
VRTX
$121B
| $1.88M | ﹤0.01% |
9,340
-8,714
| -48% | -$1.82M |
|
|
SAFE
2249
PUT
Safehold
SAFE
$1.19B
| $1.88M | ﹤0.01% |
18,654
+18,585
| +26,935% | +$1.65M |
|
2250
CALL
Ingersoll Rand
IR
$33B
| $1.88M | ﹤0.01% |
38,500
+38,222
| +13,749% | +$1.88M |
|
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.