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 | |
|---|---|---|---|---|---|---|
651
Rocket Companies
RKT
$36B
| $11.7M | 0.01% |
606,486
+325,936
| +116% | +$6.6M |
|
652
PUT
Becton Dickinson
BDX
$42.2B
| $11.5M | 0.01% |
48,483
+48,234
| +19,371% | +$11.6M |
|
|
PPLC
653
PUT
DELISTED
PortfolioPlus S&P 500 ETF
PPLC
| $11.5M | 0.01% |
156,900
+155,902
| +15,621% | +$11.4M |
|
654
CALL
MGM Resorts International
MGM
$11.5B
| $11.5M | 0.01% |
268,700
+266,639
| +12,937% | +$11M |
|
655
CALL
Toyota
TM
$209B
| $11.5M | 0.01% |
65,500
+64,739
| +8,507% | +$10.6M |
|
656
CALL
Paycom
PAYC
$6.42B
| $11.4M | 0.01% |
31,500
+31,319
| +17,303% | +$11.1M |
|
657
PUT
KLA
KLAC
$279B
| $11.4M | 0.01% |
352,000
+350,830
| +29,985% | +$11.2M |
|
658
CALL
Domino's
DPZ
$10.5B
| $11.4M | 0.01% |
+24,400
| New | +$10.3M |
|
659
CALL
SoFi Technologies
SOFI
$21.4B
| $11.3M | 0.01% |
592,100
+590,217
| +31,345% | +$10.9M |
|
660
PUT
Allstate
ALL
$65.3B
| $11.3M | 0.01% |
86,900
+86,523
| +22,950% | +$11.2M |
|
661
PUT
Dollar General
DG
$25.3B
| $11.3M | 0.01% |
52,300
+51,665
| +8,136% | +$10.9M |
|
662
PUT
Capri Holdings
CPRI
$1.77B
| $11.3M | 0.01% |
197,600
+196,395
| +16,298% | +$10.7M |
|
663
CALL
Paysafe
PSFE
$400M
| $11.3M | 0.01% |
+77,733
| New | +$11.7M |
|
664
iShares Silver Trust
SLV
$27.7B
| $11.3M | 0.01% |
465,610
-374,322
| -45% | -$9.27M |
|
665
PUT
Canadian Pacific Kansas City
CP
$81.5B
| $11.2M | 0.01% |
146,200
+145,655
| +26,726% | +$11.3M |
|
|
DISH
666
CALL
DELISTED
DISH Network Corp.
DISH
| $11.2M | 0.01% |
268,700
+267,322
| +19,399% | +$11.2M |
|
667
PUT
Ulta Beauty
ULTA
$20.6B
| $11.2M | 0.01% |
+32,400
| New | +$10.6M |
|
668
CALL
Invesco DB US Dollar Index Bullish Fund
UUP
$434M
| $11.2M | 0.01% |
453,300
+449,812
| +12,896% | +$11M |
|
669
PUT
APA Corp
APA
$13B
| $11.2M | 0.01% |
+515,600
| New | +$10.6M |
|
|
CPE
670
CALL
DELISTED
Callon Petroleum Company
CPE
| $11.2M | 0.01% |
+193,300
| New | +$8.13M |
|
671
PUT
Toronto Dominion Bank
TD
$196B
| $11.1M | 0.01% |
159,100
+158,464
| +24,916% | +$11.1M |
|
672
CALL
PNC Financial Services
PNC
$99.3B
| $11.1M | 0.01% |
58,300
+57,442
| +6,695% | +$10.8M |
|
673
PUT
Aon
AON
$75.4B
| $11.1M | 0.01% |
+46,400
| New | +$11.3M |
|
674
CALL
Kraft Heinz
KHC
$29.9B
| $11.1M | 0.01% |
271,100
+268,757
| +11,471% | +$11.3M |
|
675
CALL
Gaotu Techedu
GOTU
$386M
| $11M | 0.01% |
747,700
+742,212
| +13,524% | +$16.5M |
|
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.