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 | |
|---|---|---|---|---|---|---|
|
CRESY
6776
Cresud
CRESY
$799M
| $96K | ﹤0.01% |
+16,726
| New | +$99.8K |
|
6777
EQT Corp
EQT
$33.2B
| $96K | ﹤0.01% |
+4,342
| New | +$87.7K |
|
6778
CALL
Evertec
EVTC
$1.88B
| $96K | ﹤0.01% |
+2,200
| New | +$92.9K |
|
6779
Global Partners
GLP
$1.68B
| $96K | ﹤0.01% |
3,734
-4,364
| -54% | -$107K |
|
6780
Genprex
GNPX
$3.05M
| $96K | ﹤0.01% |
1
-1
| -50% | -$164K |
|
6781
PUT
Heron Therapeutics
HRTX
$93.5M
| $96K | ﹤0.01% |
6,200
+5,960
| +2,483% | +$94.8K |
|
6782
iShares Core S&P US Value ETF
IUSV
$27.2B
| $96K | ﹤0.01% |
+1,346
| New | +$96.8K |
|
6783
Nomura Holdings
NMR
$28.2B
| $96K | ﹤0.01% |
18,905
+11,395
| +152% | +$61.3K |
|
6784
CALL
Photronics
PLAB
$1.79B
| $96K | ﹤0.01% |
7,300
+7,093
| +3,427% | +$92.8K |
|
|
SHOE
6785
Shoe Station Group
SHOE
$417M
| $96K | ﹤0.01% |
+2,688
| New | +$87K |
|
6786
Sea Limited
SE
$65.4B
| $96K | ﹤0.01% |
350
-20,454
| -98% | -$5.19M |
|
6787
Schneider National
SNDR
$6.31B
| $96K | ﹤0.01% |
+4,433
| New | +$107K |
|
|
SUPV
6788
CALL
Grupo Supervielle
SUPV
$830M
| $96K | ﹤0.01% |
46,600
+46,408
| +24,171% | +$90.3K |
|
6789
PUT
Turning Point Brands
TPB
$1.46B
| $96K | ﹤0.01% |
2,100
+1,930
| +1,135% | +$89.2K |
|
|
TPIC
6790
PUT
DELISTED
TPI Composites
TPIC
| $96K | ﹤0.01% |
2,000
+1,969
| +6,352% | +$96.8K |
|
6791
PUT
VolitionRx Ltd
VNRX
$8.56M
| $96K | ﹤0.01% |
+1,465
| New | +$99.1K |
|
6792
CALL
ADMA Biologics
ADMA
$1.95B
| $95K | ﹤0.01% |
59,700
+58,977
| +8,157% | +$104K |
|
6793
CALL
Anterix
ATEX
$1.82B
| $95K | ﹤0.01% |
1,600
+1,426
| +820% | +$71.4K |
|
|
COOP
6794
DELISTED
Mr. Cooper
COOP
| $95K | ﹤0.01% |
2,883
-1,653
| -36% | -$55.2K |
|
6795
Energizer
ENR
$1.44B
| $95K | ﹤0.01% |
2,221
-8,644
| -80% | -$405K |
|
6796
PUT
Energy Recovery
ERII
$440M
| $95K | ﹤0.01% |
+4,200
| New | +$82.8K |
|
6797
PUT
Global Industrial
GIC
$1.36B
| $95K | ﹤0.01% |
+2,600
| New | +$98.9K |
|
6798
PUT
Globe Life
GL
$14.2B
| $95K | ﹤0.01% |
1,000
+997
| +33,233% | +$102K |
|
|
SNBR
6799
DELISTED
Sleep Number
SNBR
| $95K | ﹤0.01% |
867
-1,267
| -59% | -$144K |
|
6800
CALL
BlackRock TCP Capital
TCPC
$269M
| $95K | ﹤0.01% |
6,900
+6,857
| +15,947% | +$99.1K |
|
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.