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 | |
|---|---|---|---|---|---|---|
2376
PUT
CoreCivic
CXW
$3.1B
| $1.7M | ﹤0.01% |
162,700
+160,641
| +7,802% | +$1.44M |
|
|
CTRA
2377
DELISTED
Coterra Energy
CTRA
| $1.7M | ﹤0.01% |
97,517
+30,293
| +45% | +$515K |
|
2378
PUT
MP Materials
MP
$7.35B
| $1.7M | ﹤0.01% |
46,200
+44,561
| +2,719% | +$1.38M |
|
2379
CALL
Pultegroup
PHM
$24.5B
| $1.7M | ﹤0.01% |
31,200
+30,895
| +10,130% | +$1.73M |
|
2380
CALL
Five Below
FIVE
$11.2B
| $1.7M | ﹤0.01% |
8,800
+8,528
| +3,135% | +$1.63M |
|
2381
CALL
Flex
FLEX
$43.4B
| $1.7M | ﹤0.01% |
126,198
+123,222
| +4,141% | +$1.67M |
|
2382
CALL
Alamos Gold
AGI
$12.4B
| $1.7M | ﹤0.01% |
222,000
+221,694
| +72,449% | +$1.89M |
|
2383
CALL
DaVita
DVA
$15.1B
| $1.7M | ﹤0.01% |
14,100
+13,951
| +9,363% | +$1.65M |
|
|
AUY
2384
PUT
DELISTED
Yamana Gold, Inc.
AUY
| $1.7M | ﹤0.01% |
402,100
+397,744
| +9,131% | +$1.93M |
|
|
CERN
2385
PUT
DELISTED
Cerner Corp
CERN
| $1.7M | ﹤0.01% |
21,700
+21,577
| +17,542% | +$1.66M |
|
2386
CALL
Red Rock Resorts
RRR
$3.74B
| $1.7M | ﹤0.01% |
39,900
+39,661
| +16,595% | +$1.57M |
|
2387
CALL
SkinHealth Systems
SKIN
$94.9M
| $1.7M | ﹤0.01% |
100,900
+100,113
| +12,721% | +$1.37M |
|
2388
CALL
Abits Group
ABTS
$3.38M
| $1.69M | ﹤0.01% |
+5,067
| New | +$804K |
|
|
BLUE
2389
PUT
DELISTED
bluebird bio
BLUE
| $1.69M | ﹤0.01% |
4,092
+4,007
| +4,714% | +$1.59M |
|
|
CMA
2390
DELISTED
Comerica
CMA
| $1.69M | ﹤0.01% |
23,750
+13,800
| +139% | +$1.02M |
|
2391
CALL
Globalstar
GSAT
$10.2B
| $1.69M | ﹤0.01% |
63,387
+62,859
| +11,905% | +$1.23M |
|
|
KC
2392
Kingsoft Cloud Holdings
KC
$2.84B
| $1.69M | ﹤0.01% |
49,877
+16,268
| +48% | +$651K |
|
2393
PUT
Village Farms International
VFF
$235M
| $1.69M | ﹤0.01% |
158,200
+157,637
| +27,999% | +$1.66M |
|
2394
CALL
American Well
AMWL
$181M
| $1.69M | ﹤0.01% |
6,715
+6,681
| +19,650% | +$1.93M |
|
2395
CALL
Manulife Financial
MFC
$72.6B
| $1.69M | ﹤0.01% |
85,700
+82,982
| +3,053% | +$1.74M |
|
2396
CALL
PureCycle Technologies
PCT
$1.17B
| $1.69M | ﹤0.01% |
+71,400
| New | +$1.54M |
|
2397
CALL
Beam Therapeutics
BEAM
$2.58B
| $1.69M | ﹤0.01% |
13,100
+12,770
| +3,870% | +$1.02M |
|
2398
CALL
Elanco Animal Health
ELAN
$12.4B
| $1.69M | ﹤0.01% |
48,600
+48,342
| +18,737% | +$1.59M |
|
2399
NXP Semiconductors
NXPI
$68B
| $1.69M | ﹤0.01% |
8,191
-16,871
| -67% | -$3.38M |
|
2400
Omeros
OMER
$709M
| $1.69M | ﹤0.01% |
113,601
+66,209
| +140% | +$1.11M |
|
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.