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 | |
|---|---|---|---|---|---|---|
5076
PUT
DigitalOcean
DOCN
$14.1B
| $283K | ﹤0.01% |
+5,100
| New | +$220K |
|
5077
Regis Corp
RGS
$68.5M
| $283K | ﹤0.01% |
1,514
+1,239
| +451% | +$265K |
|
5078
Rush Street Interactive
RSI
$2.76B
| $283K | ﹤0.01% |
23,085
-8,361
| -27% | -$112K |
|
5079
Schwab US Large-Cap Growth ETF
SCHG
$59.1B
| $283K | ﹤0.01% |
+15,536
| New | +$269K |
|
5080
CALL
Viasat
VSAT
$10.7B
| $283K | ﹤0.01% |
+5,700
| New | +$283K |
|
|
AKTS
5081
PUT
DELISTED
Akoustis Technologies Inc
AKTS
| $283K | ﹤0.01% |
26,500
+26,161
| +7,717% | +$276K |
|
|
MDC
5082
PUT
DELISTED
M.D.C. Holdings, Inc.
MDC
| $283K | ﹤0.01% |
5,616
+5,532
| +6,586% | +$317K |
|
|
NATI
5083
CALL
DELISTED
National Instruments Corp
NATI
| $283K | ﹤0.01% |
6,700
+6,457
| +2,657% | +$272K |
|
|
RETA
5084
CALL
DELISTED
Reata Pharmaceuticals, Inc. Class A Common Stock
RETA
| $283K | ﹤0.01% |
2,000
+1,955
| +4,344% | +$221K |
|
5085
PUT
Hims & Hers Health
HIMS
$6.26B
| $282K | ﹤0.01% |
25,900
+25,403
| +5,111% | +$302K |
|
5086
MakeMyTrip
MMYT
$5.37B
| $282K | ﹤0.01% |
9,405
+8,450
| +885% | +$235K |
|
5087
CALL
Pinnacle Financial Partners Inc
PNFP
$15.8B
| $282K | ﹤0.01% |
3,200
+3,111
| +3,496% | +$278K |
|
|
DZSI
5088
CALL
DELISTED
DZS Inc. Common Stock
DZSI
| $282K | ﹤0.01% |
13,600
+13,332
| +4,975% | +$231K |
|
5089
Allegiant Air
ALGT
$2.66B
| $281K | ﹤0.01% |
+1,450
| New | +$325K |
|
|
CIM
5090
PUT
Chimera Investment
CIM
$1.06B
| $281K | ﹤0.01% |
6,233
+6,128
| +5,836% | +$255K |
|
|
DX
5091
CALL
Dynex Capital
DX
$3.18B
| $281K | ﹤0.01% |
15,100
+14,727
| +3,948% | +$289K |
|
5092
PUT
Globalstar
GSAT
$10.3B
| $281K | ﹤0.01% |
10,560
+10,451
| +9,588% | +$205K |
|
5093
IMAX
IMAX
$2.61B
| $281K | ﹤0.01% |
13,087
+7,505
| +134% | +$162K |
|
5094
Range Resources
RRC
$9.24B
| $281K | ﹤0.01% |
16,818
-8,862
| -35% | -$111K |
|
|
ZEPP
5095
Zepp Health
ZEPP
$64.8M
| $281K | ﹤0.01% |
6,004
+1,404
| +31% | +$58.5K |
|
5096
NextTrip
NTRP
$24.3M
| $281K | ﹤0.01% |
3,608
+2,367
| +191% | +$175K |
|
|
RTL
5097
PUT
DELISTED
The Necessity Retail REIT, Inc. Class A Common Stock
RTL
| $281K | ﹤0.01% |
+33,200
| New | +$310K |
|
|
OIG
5098
PUT
DELISTED
Orbital Infrastructure Group, Inc. Common Stock
OIG
| $281K | ﹤0.01% |
1,610
+1,602
| +20,025% | +$280K |
|
|
GRA
5099
DELISTED
W.R. Grace & Co.
GRA
| $281K | ﹤0.01% |
4,068
-3,019
| -43% | -$203K |
|
|
ARI
5100
PUT
Apollo Commercial Real Estate
ARI
$851M
| $280K | ﹤0.01% |
17,600
+17,420
| +9,678% | +$269K |
|
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.