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 | |
|---|---|---|---|---|---|---|
|
GPUS
4676
PUT
Hyperscale Data Inc
GPUS
$52.9M
| $360K | ﹤0.01% |
+1
| New | +$430K |
|
|
TBCH
4677
PUT
Turtle Beach Corp
TBCH
$238M
| $360K | ﹤0.01% |
11,300
+11,073
| +4,878% | +$336K |
|
4678
CALL
Archrock
AROC
$6.16B
| $359K | ﹤0.01% |
40,300
+39,722
| +6,872% | +$371K |
|
4679
PUT
Commault Systems
CVLT
$4.98B
| $359K | ﹤0.01% |
4,600
+4,581
| +24,111% | +$333K |
|
|
NIU
4680
Niu Technologies
NIU
$200M
| $359K | ﹤0.01% |
11,012
+1,006
| +10% | +$33.5K |
|
4681
CALL
Precigen
PGEN
$1.94B
| $359K | ﹤0.01% |
+55,100
| New | +$385K |
|
|
GMBLW
4682
CALL
DELISTED
Esports Entertainment Group Inc. Warrant
GMBLW
| $359K | ﹤0.01% |
33,100
+32,603
| +6,560% | +$261K |
|
|
VWTR
4683
PUT
DELISTED
Vidler Water Resouces, Inc. Common Stock
VWTR
| $359K | ﹤0.01% |
+27,000
| New | +$278K |
|
4684
CALL
American States Water
AWR
$3.44B
| $358K | ﹤0.01% |
4,500
+4,416
| +5,257% | +$351K |
|
4685
PUT
Camden Property Trust
CPT
$11.5B
| $358K | ﹤0.01% |
2,700
+2,679
| +12,757% | +$332K |
|
4686
CALL
Gray Television
GTN
$437M
| $358K | ﹤0.01% |
+15,300
| New | +$332K |
|
4687
CALL
Northern Trust
NTRS
$21.8B
| $358K | ﹤0.01% |
3,100
+2,972
| +2,322% | +$341K |
|
|
RC
4688
CALL
Ready Capital
RC
$260M
| $358K | ﹤0.01% |
22,600
+22,253
| +6,413% | +$329K |
|
4689
PUT
Meritage Homes
MTH
$4.78B
| $357K | ﹤0.01% |
7,600
+7,578
| +34,445% | +$383K |
|
|
VNET
4690
VNET Group
VNET
$1.79B
| $357K | ﹤0.01% |
15,564
+8,333
| +115% | +$212K |
|
|
COUP
4691
DELISTED
Coupa Software Incorporated
COUP
| $357K | ﹤0.01% |
1,363
+473
| +53% | +$117K |
|
|
CADE
4692
CALL
DELISTED
Cadence Bank
CADE
| $356K | ﹤0.01% |
12,600
+12,413
| +6,638% | +$376K |
|
4693
PUT
Nordic American Tanker
NAT
$1.36B
| $356K | ﹤0.01% |
+108,600
| New | +$367K |
|
|
ENLC
4694
PUT
DELISTED
ENLINK MIDSTREAM, LLC
ENLC
| $356K | ﹤0.01% |
+55,800
| New | +$286K |
|
4695
PUT
Alkermes
ALKS
$8.11B
| $355K | ﹤0.01% |
+14,500
| New | +$323K |
|
4696
PUT
Angi Inc
ANGI
$247M
| $355K | ﹤0.01% |
2,630
+2,603
| +9,641% | +$378K |
|
|
NIU
4697
CALL
Niu Technologies
NIU
$200M
| $355K | ﹤0.01% |
10,900
+10,675
| +4,744% | +$356K |
|
|
JJT
4698
PUT
DELISTED
iPath Series B Bloomberg Tin Subindex Total ReturnSM ETN
JJT
| $355K | ﹤0.01% |
11,600
-25,745
| -69% | -$2.14M |
|
|
ENBL
4699
PUT
DELISTED
ENABLE MIDSTREAM PARTNERS, LP
ENBL
| $355K | ﹤0.01% |
39,000
+38,720
| +13,829% | +$317K |
|
4700
CALL
Apple Hospitality REIT
APLE
$3.97B
| $354K | ﹤0.01% |
23,200
+23,129
| +32,576% | +$359K |
|
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.