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 | |
|---|---|---|---|---|---|---|
2276
Electronic Arts
EA
$52.4B
| $1.83M | ﹤0.01% |
12,765
-50,892
| -80% | -$7.22M |
|
|
XIFR
2277
CALL
XPLR Infrastructure LP
XIFR
$1.18B
| $1.83M | ﹤0.01% |
24,000
+23,767
| +10,200% | +$1.7M |
|
2278
CALL
Lattice Semiconductor
LSCC
$17.6B
| $1.83M | ﹤0.01% |
32,600
+32,326
| +11,798% | +$1.66M |
|
|
MOMO
2279
Hello Group
MOMO
$869M
| $1.83M | ﹤0.01% |
119,656
+54,794
| +84% | +$807K |
|
|
ATIP
2280
CALL
DELISTED
ATI Physical Therapy, Inc.
ATIP
| $1.83M | ﹤0.01% |
3,838
+3,786
| +7,281% | +$1.87M |
|
|
AGNT
2281
CALL
AGNT Inc
AGNT
$665M
| $1.83M | ﹤0.01% |
47,200
+46,340
| +5,388% | +$1.6M |
|
2282
3D Systems Corp
DDD
$420M
| $1.83M | ﹤0.01% |
45,722
+21,596
| +90% | +$571K |
|
|
DM
2283
PUT
DELISTED
Desktop Metal, Inc.
DM
| $1.83M | ﹤0.01% |
15,890
+15,646
| +6,412% | +$2.05M |
|
2284
PUT
Banco Santander
SAN
$194B
| $1.83M | ﹤0.01% |
467,100
+462,598
| +10,275% | +$1.79M |
|
|
DNMR
2285
CALL
DELISTED
Danimer Scientific, Inc.
DNMR
| $1.82M | ﹤0.01% |
1,820
+1,802
| +10,011% | +$1.8M |
|
2286
CALL
Zumiez
ZUMZ
$320M
| $1.82M | ﹤0.01% |
37,200
+36,711
| +7,507% | +$1.65M |
|
2287
CALL
Banco Bradesco
BBD
$38.1B
| $1.82M | ﹤0.01% |
390,577
+388,270
| +16,830% | +$1.69M |
|
2288
Renaissance IPO ETF
IPO
$154M
| $1.82M | ﹤0.01% |
27,471
+25,951
| +1,707% | +$1.61M |
|
2289
Linde
LIN
$237B
| $1.82M | ﹤0.01% |
6,287
-2,718
| -30% | -$792K |
|
2290
CALL
Noodles & Co
NDLS
$90.5M
| $1.82M | ﹤0.01% |
18,200
+17,996
| +8,822% | +$1.67M |
|
2291
CALL
Eastern Bankshares
EBC
$5.25B
| $1.82M | ﹤0.01% |
88,300
+87,332
| +9,022% | +$1.85M |
|
2292
CALL
Innovative Industrial Properties
IIPR
$1.78B
| $1.81M | ﹤0.01% |
9,500
+9,211
| +3,187% | +$1.69M |
|
|
MRSH
2293
PUT
Marsh
MRSH
$86.3B
| $1.81M | ﹤0.01% |
12,900
+12,692
| +6,102% | +$1.7M |
|
2294
PUT
Sempra
SRE
$60.8B
| $1.81M | ﹤0.01% |
27,400
+27,090
| +8,739% | +$1.85M |
|
2295
PUT
Aflac
AFL
$63.9B
| $1.81M | ﹤0.01% |
33,800
+33,413
| +8,634% | +$1.82M |
|
2296
Corteva
CTVA
$59.7B
| $1.81M | ﹤0.01% |
40,854
-3,512
| -8% | -$162K |
|
2297
PUT
Travelers Companies
TRV
$80.8B
| $1.81M | ﹤0.01% |
12,100
+11,882
| +5,450% | +$1.84M |
|
2298
CALL
Brookfield
BN
$102B
| $1.8M | ﹤0.01% |
65,685
+65,293
| +16,656% | +$1.67M |
|
2299
CALL
Keurig Dr Pepper
KDP
$40.4B
| $1.8M | ﹤0.01% |
51,200
+50,166
| +4,852% | +$1.79M |
|
2300
PUT
Bank OZK
OZK
$5.49B
| $1.8M | ﹤0.01% |
42,800
+42,493
| +13,841% | +$1.77M |
|
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.