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 | |
|---|---|---|---|---|---|---|
|
MODV
6751
DELISTED
ModivCare
MODV
| $98K | ﹤0.01% |
581
-446
| -43% | -$66.8K |
|
6752
PUT
BRC Group Holdings
RILY
$289M
| $98K | ﹤0.01% |
1,300
+1,219
| +1,505% | +$85.3K |
|
6753
PUT
Solid Biosciences
SLDB
$795M
| $98K | ﹤0.01% |
1,787
+1,766
| +8,410% | +$117K |
|
6754
Telecom Argentina
TEO
$6.03B
| $98K | ﹤0.01% |
+18,464
| New | +$97.2K |
|
6755
Twist Bioscience
TWST
$5.68B
| $98K | ﹤0.01% |
740
-56
| -7% | -$6.51K |
|
6756
Vivani Medical
VANI
$111M
| $98K | ﹤0.01% |
6,624
+5,826
| +730% | +$113K |
|
6757
Vanguard Russell 2000 Growth ETF
VTWG
$1.48B
| $98K | ﹤0.01% |
+432
| New | +$94.6K |
|
6758
PUT
WaFd
WAFD
$2.71B
| $98K | ﹤0.01% |
3,100
+3,070
| +10,233% | +$100K |
|
|
RNLX
6759
CALL
DELISTED
Renalytix plc American Depositary Shares
RNLX
| $98K | ﹤0.01% |
3,200
+3,158
| +7,519% | +$94.5K |
|
|
PACW
6760
PUT
DELISTED
PacWest Bancorp
PACW
| $98K | ﹤0.01% |
2,400
+2,303
| +2,374% | +$98.5K |
|
|
ACC
6761
PUT
DELISTED
American Campus Communities, Inc.
ACC
| $98K | ﹤0.01% |
2,100
+2,038
| +3,287% | +$94.4K |
|
6762
Carlisle Companies
CSL
$14.4B
| $97K | ﹤0.01% |
+512
| New | +$95.2K |
|
6763
PUT
Civeo
CVEO
$345M
| $97K | ﹤0.01% |
+5,500
| New | +$92K |
|
6764
PUT
Vaalco Energy
EGY
$574M
| $97K | ﹤0.01% |
30,000
+29,647
| +8,399% | +$81.6K |
|
6765
PUT
Franklin Covey
FC
$240M
| $97K | ﹤0.01% |
+3,000
| New | +$92.5K |
|
6766
CALL
Fortis
FTS
$29.1B
| $97K | ﹤0.01% |
2,200
+2,190
| +21,900% | +$98.7K |
|
6767
Hormel Foods
HRL
$13.8B
| $97K | ﹤0.01% |
2,047
-16,818
| -89% | -$801K |
|
6768
Myriad Genetics
MYGN
$267M
| $97K | ﹤0.01% |
3,177
+2,712
| +583% | +$78.4K |
|
6769
PUT
Companhia Siderúrgica Nacional
SID
$1.31B
| $97K | ﹤0.01% |
11,100
+11,009
| +12,098% | +$95.3K |
|
|
INFI
6770
CALL
DELISTED
Infinity Pharmaceuticals, Inc.
INFI
| $97K | ﹤0.01% |
32,500
+32,168
| +9,689% | +$102K |
|
|
VIVO
6771
DELISTED
Meridian Bioscience Inc
VIVO
| $97K | ﹤0.01% |
4,392
-3,395
| -44% | -$72K |
|
|
ADAP
6772
DELISTED
Adaptimmune Therapeutics
ADAP
| $96K | ﹤0.01% |
22,680
-11,594
| -34% | -$56.3K |
|
6773
Beam Global
BEEM
$23.3M
| $96K | ﹤0.01% |
+2,527
| New | +$83.3K |
|
|
BPMC
6774
CALL
DELISTED
Blueprint Medicines
BPMC
| $96K | ﹤0.01% |
1,100
+1,085
| +7,233% | +$99.4K |
|
6775
PUT
Brixmor Property Group
BRX
$9.65B
| $96K | ﹤0.01% |
4,200
+4,166
| +12,253% | +$92.8K |
|
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.