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 | |
|---|---|---|---|---|---|---|
2501
PUT
FIGS
FIGS
$1.59B
| $1.57M | ﹤0.01% |
+31,300
| New | +$1.17M |
|
|
PR
2502
CALL
Permian Resources
PR
$17.9B
| $1.57M | ﹤0.01% |
231,300
+228,920
| +9,618% | +$1.18M |
|
2503
CALL
Cinemark Holdings
CNK
$3.82B
| $1.57M | ﹤0.01% |
+71,400
| New | +$1.58M |
|
|
RFP
2504
PUT
DELISTED
Resolute Forest Products Inc.
RFP
| $1.56M | ﹤0.01% |
128,300
+127,625
| +18,907% | +$1.79M |
|
2505
PUT
uniQure
QURE
$2.68B
| $1.56M | ﹤0.01% |
50,800
+50,729
| +71,449% | +$1.7M |
|
2506
CALL
Black Stone Minerals
BSM
$3.11B
| $1.56M | ﹤0.01% |
145,400
+144,622
| +18,589% | +$1.46M |
|
2507
PUT
Ternium
TX
$9.29B
| $1.56M | ﹤0.01% |
40,600
+40,514
| +47,109% | +$1.55M |
|
2508
CALL
Coty
COTY
$2.33B
| $1.56M | ﹤0.01% |
167,100
+163,914
| +5,145% | +$1.49M |
|
2509
Invesco Senior Loan ETF
BKLN
$7.1B
| $1.56M | ﹤0.01% |
70,408
+31,396
| +80% | +$696K |
|
|
VISN
2510
Vistance Networks Inc
VISN
$2.66B
| $1.56M | ﹤0.01% |
73,177
-35,834
| -33% | -$668K |
|
2511
PepsiCo
PEP
$186B
| $1.56M | ﹤0.01% |
+10,526
| New | +$1.53M |
|
|
PTR
2512
PUT
DELISTED
PETROCHINA COMPANY LIMITED ADS (REP 100 H SHARES)
PTR
| $1.56M | ﹤0.01% |
31,800
+31,470
| +9,536% | +$1.28M |
|
|
TELL
2513
CALL
DELISTED
Tellurian Inc.
TELL
| $1.55M | ﹤0.01% |
334,500
+332,091
| +13,785% | +$1.02M |
|
|
ZNTE
2514
PUT
DELISTED
Zanite Acquisition Corp. Class A Common Stock
ZNTE
| $1.55M | ﹤0.01% |
154,300
+150,230
| +3,691% | +$1.51M |
|
2515
PUT
Hormel Foods
HRL
$13.9B
| $1.55M | ﹤0.01% |
32,500
+32,263
| +13,613% | +$1.54M |
|
|
QELL
2516
CALL
DELISTED
Qell Acquisition Corp. Class A Ordinary Shares
QELL
| $1.55M | ﹤0.01% |
155,900
+151,864
| +3,763% | +$1.51M |
|
|
SDC
2517
PUT
DELISTED
SmileDirectClub, Inc. Class A Common Stock
SDC
| $1.55M | ﹤0.01% |
178,600
+177,054
| +11,452% | +$1.63M |
|
|
VZIO
2518
CALL
DELISTED
VIZIO Holding Corp.
VZIO
| $1.55M | ﹤0.01% |
+57,300
| New | +$1.35M |
|
2519
CALL
Edison International
EIX
$30.7B
| $1.54M | ﹤0.01% |
26,700
+26,591
| +24,395% | +$1.55M |
|
2520
CALL
SS&C Technologies
SSNC
$17.8B
| $1.54M | ﹤0.01% |
21,400
+20,515
| +2,318% | +$1.5M |
|
|
USCR
2521
CALL
DELISTED
U S Concrete, Inc.
USCR
| $1.54M | ﹤0.01% |
20,900
+20,777
| +16,892% | +$1.34M |
|
|
CTLP
2522
PUT
DELISTED
Cantaloupe
CTLP
| $1.54M | ﹤0.01% |
129,900
+129,681
| +59,215% | +$1.52M |
|
|
HES
2523
DELISTED
Hess
HES
| $1.54M | ﹤0.01% |
17,592
+15,044
| +590% | +$1.21M |
|
|
NOVA
2524
PUT
DELISTED
Sunnova Energy
NOVA
| $1.54M | ﹤0.01% |
40,800
+40,400
| +10,100% | +$1.34M |
|
2525
PUT
Plains GP Holdings
PAGP
$5.23B
| $1.53M | ﹤0.01% |
128,500
+127,471
| +12,388% | +$1.36M |
|
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.