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 | |
|---|---|---|---|---|---|---|
6451
CALL
Equitable Holdings
EQH
$13B
| $121K | ﹤0.01% |
4,000
+3,743
| +1,456% | +$122K |
|
6452
Helen of Troy
HELE
$644M
| $121K | ﹤0.01% |
+533
| New | +$117K |
|
6453
OR Royalties Inc
OR
$5.58B
| $121K | ﹤0.01% |
8,879
-40,102
| -82% | -$536K |
|
|
FOCS
6454
CALL
DELISTED
Focus Financial Partners Inc. Class A
FOCS
| $121K | ﹤0.01% |
2,500
+2,492
| +31,150% | +$120K |
|
|
WPG
6455
DELISTED
Washington Prime Group Inc.
WPG
| $121K | ﹤0.01% |
55,815
+22,300
| +67% | +$58.4K |
|
|
ADVM
6456
DELISTED
Adverum Biotechnologies
ADVM
| $120K | ﹤0.01% |
3,443
+2,493
| +262% | +$134K |
|
6457
PUT
CBRE Group
CBRE
$42.5B
| $120K | ﹤0.01% |
1,400
+1,357
| +3,156% | +$116K |
|
6458
PUT
Compugen
CGEN
$222M
| $120K | ﹤0.01% |
14,500
+14,338
| +8,851% | +$116K |
|
6459
Core Laboratories
CLB
$488M
| $120K | ﹤0.01% |
+3,095
| New | +$111K |
|
6460
CALL
dLocal
DLO
$4.44B
| $120K | ﹤0.01% |
+2,300
| New | +$88.5K |
|
6461
PUT
DiaMedica Therapeutics
DMAC
$342M
| $120K | ﹤0.01% |
+27,100
| New | +$222K |
|
6462
CALL
MakeMyTrip
MMYT
$5.36B
| $120K | ﹤0.01% |
4,000
+3,875
| +3,100% | +$108K |
|
6463
CALL
Penske Automotive Group
PAG
$14.3B
| $120K | ﹤0.01% |
1,600
+1,593
| +22,757% | +$133K |
|
6464
PUT
Rogers Corp
ROG
$2.21B
| $120K | ﹤0.01% |
600
+597
| +19,900% | +$114K |
|
6465
PUT
Wabash National
WNC
$512M
| $120K | ﹤0.01% |
7,500
+7,487
| +57,592% | +$129K |
|
|
NS
6466
PUT
DELISTED
NuStar Energy L.P.
NS
| $120K | ﹤0.01% |
6,700
+6,574
| +5,217% | +$122K |
|
|
ECOM
6467
CALL
DELISTED
CHANNELADVISOR CORPORATION
ECOM
| $120K | ﹤0.01% |
4,900
+4,783
| +4,088% | +$115K |
|
|
GCP
6468
CALL
DELISTED
GCP Applied Technologies Inc.
GCP
| $120K | ﹤0.01% |
5,200
+5,142
| +8,866% | +$128K |
|
|
GNOG
6469
DELISTED
Golden Nugget Online Gaming, Inc. Class A Common Stock
GNOG
| $120K | ﹤0.01% |
9,458
-27,418
| -74% | -$372K |
|
|
FLXN
6470
CALL
DELISTED
Flexion Therapeutics, Inc.
FLXN
| $120K | ﹤0.01% |
14,600
+14,486
| +12,707% | +$123K |
|
6471
CALL
Buckle
BKE
$2.25B
| $119K | ﹤0.01% |
2,400
+2,380
| +11,900% | +$101K |
|
6472
CALL
Cimpress
CMPR
$2.39B
| $119K | ﹤0.01% |
1,100
+1,094
| +18,233% | +$111K |
|
|
EXK
6473
PUT
Endeavour Silver
EXK
$2.23B
| $119K | ﹤0.01% |
19,600
+18,787
| +2,311% | +$117K |
|
|
XRN
6474
PUT
Chiron Real Estate Inc
XRN
$514M
| $119K | ﹤0.01% |
1,620
+1,607
| +12,362% | +$116K |
|
|
NGD
6475
CALL
DELISTED
New Gold Inc
NGD
| $119K | ﹤0.01% |
66,200
+65,391
| +8,083% | +$123K |
|
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.