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 | |
|---|---|---|---|---|---|---|
601
PUT
Macy's
M
$6.11B
| $13M | 0.01% |
686,700
+677,986
| +7,780% | +$12M |
|
602
CALL
Simon Property Group
SPG
$73.1B
| $13M | 0.01% |
+99,500
| New | +$12.4M |
|
|
NKLA
603
PUT
DELISTED
Nikola Corporation Common Stock
NKLA
| $12.9M | 0.01% |
23,760
+23,514
| +9,559% | +$9.8M |
|
604
PUT
O'Reilly Automotive
ORLY
$71.2B
| $12.7M | 0.01% |
337,500
+336,180
| +25,468% | +$12.1M |
|
605
CALL
Sony
SONY
$121B
| $12.7M | 0.01% |
654,500
+648,015
| +9,993% | +$13.1M |
|
606
CALL
Match Group
MTCH
$8.68B
| $12.7M | 0.01% |
+78,800
| New | +$11.5M |
|
607
Tilray
TLRY
$486M
| $12.7M | 0.01% |
70,116
+70,093
| +304,752% | +$12.3M |
|
608
Delta Air Lines
DAL
$53.6B
| $12.7M | 0.01% |
292,461
+265,663
| +991% | +$12.3M |
|
609
PUT
TripAdvisor
TRIP
$1.56B
| $12.6M | 0.01% |
313,700
+310,671
| +10,257% | +$14M |
|
610
PUT
Xtrackers MSCI Emerging Markets Hedged Equity ETF
DBEM
$107M
| $12.6M | 0.01% |
311,500
+308,300
| +9,634% | +$8.93M |
|
611
PUT
RingCentral
RNG
$3.21B
| $12.6M | 0.01% |
43,300
+42,676
| +6,839% | +$12.2M |
|
612
PUT
Microvision
MVIS
$101M
| $12.6M | 0.01% |
+749,700
| New | +$12.3M |
|
613
CALL
Capri Holdings
CPRI
$1.77B
| $12.5M | 0.01% |
219,100
+217,220
| +11,554% | +$11.8M |
|
614
CALL
PagSeguro Digital
PAGS
$2.62B
| $12.5M | 0.01% |
224,000
+223,029
| +22,969% | +$10.7M |
|
615
PUT
Vertex Pharmaceuticals
VRTX
$120B
| $12.5M | 0.01% |
61,900
+60,899
| +6,084% | +$12.7M |
|
616
CALL
Kroger
KR
$34.2B
| $12.5M | 0.01% |
325,100
+322,984
| +15,264% | +$12.2M |
|
|
SPLK
617
DELISTED
Splunk Inc
SPLK
| $12.4M | 0.01% |
85,999
+12,358
| +17% | +$1.57M |
|
618
CALL
Honeywell
HON
$77.2B
| $12.4M | 0.01% |
+60,053
| New | +$12.7M |
|
619
PUT
Dick's Sporting Goods
DKS
$18.3B
| $12.4M | 0.01% |
123,300
+122,700
| +20,450% | +$11M |
|
|
SCIU
620
PUT
DELISTED
Global X Scientific Beta US ETF
SCIU
| $12.4M | 0.01% |
369,200
+365,961
| +11,299% | +$12.2M |
|
621
CALL
Hilton Worldwide
HLT
$72.5B
| $12.4M | 0.01% |
102,400
+101,144
| +8,053% | +$12.6M |
|
622
CALL
lululemon athletica
LULU
$12.6B
| $12.3M | 0.01% |
33,800
+33,175
| +5,308% | +$10.9M |
|
623
CALL
Crown Castle
CCI
$32.5B
| $12.3M | 0.01% |
63,200
+62,073
| +5,508% | +$11.6M |
|
624
CALL
Dollar Tree
DLTR
$22.7B
| $12.3M | 0.01% |
123,900
+123,424
| +25,929% | +$13.4M |
|
625
Wynn Resorts
WYNN
$10B
| $12.3M | 0.01% |
100,753
+77,260
| +329% | +$9.84M |
|
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.