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 | |
|---|---|---|---|---|---|---|
2526
PUT
Senseonics Holdings Inc
SENS
$254M
| $1.53M | ﹤0.01% |
19,980
+19,831
| +13,309% | +$1M |
|
2527
CALL
Archer Daniels Midland
ADM
$41.4B
| $1.53M | ﹤0.01% |
+25,300
| New | +$1.61M |
|
2528
CALL
Helmerich & Payne
HP
$3.53B
| $1.53M | ﹤0.01% |
47,000
+46,380
| +7,481% | +$1.36M |
|
2529
CALL
Melco Resorts & Entertainment
MLCO
$2.1B
| $1.53M | ﹤0.01% |
+92,500
| New | +$1.68M |
|
|
SUMO
2530
CALL
DELISTED
Sumo Logic, Inc. Common Stock
SUMO
| $1.53M | ﹤0.01% |
74,200
+73,654
| +13,490% | +$1.42M |
|
|
CRHC
2531
CALL
DELISTED
Cohn Robbins Holdings Corp.
CRHC
| $1.53M | ﹤0.01% |
+155,600
| New | +$1.54M |
|
2532
Box
BOX
$4.02B
| $1.53M | ﹤0.01% |
59,888
+56,277
| +1,558% | +$1.31M |
|
|
VTNR
2533
CALL
DELISTED
Vertex Energy, Inc
VTNR
| $1.53M | ﹤0.01% |
115,700
+115,644
| +206,507% | +$479K |
|
|
FINV
2534
CALL
FinVolution Group
FINV
$1.12B
| $1.53M | ﹤0.01% |
160,500
+158,986
| +10,501% | +$1.21M |
|
|
SRG
2535
PUT
Seritage Growth Properties
SRG
$130M
| $1.53M | ﹤0.01% |
83,000
+82,033
| +8,483% | +$1.46M |
|
2536
PUT
Vanguard Total Bond Market
BND
$157B
| $1.53M | ﹤0.01% |
17,800
+17,765
| +50,757% | +$1.52M |
|
2537
NOV
NOV
$7.45B
| $1.53M | ﹤0.01% |
99,672
+84,180
| +543% | +$1.31M |
|
|
SIX
2538
DELISTED
Six Flags Entertainment Corp.
SIX
| $1.53M | ﹤0.01% |
35,281
+28,841
| +448% | +$1.3M |
|
2539
CALL
Equinix
EQIX
$107B
| $1.52M | ﹤0.01% |
1,900
+1,880
| +9,400% | +$1.4M |
|
2540
CALL
Huntsman Corp
HUN
$2.24B
| $1.52M | ﹤0.01% |
57,500
+57,059
| +12,939% | +$1.62M |
|
2541
PUT
Lear
LEA
$7.19B
| $1.52M | ﹤0.01% |
8,700
+8,441
| +3,259% | +$1.56M |
|
2542
PUT
Sensata Technologies
ST
$6.65B
| $1.52M | ﹤0.01% |
26,300
+26,020
| +9,293% | +$1.52M |
|
|
GOL
2543
PUT
DELISTED
Gol Linhas Aéreas Inteligentes S.A. American Depositary Shares (Each representing Ten Preferred Shares)
GOL
| $1.52M | ﹤0.01% |
164,900
+164,795
| +156,948% | +$1.54M |
|
|
RUTH
2544
CALL
DELISTED
Ruth's Hospitality Group, Inc.
RUTH
| $1.52M | ﹤0.01% |
65,900
+65,618
| +23,269% | +$1.6M |
|
2545
CALL
Packaging Corp of America
PKG
$22.7B
| $1.52M | ﹤0.01% |
11,200
+11,091
| +10,175% | +$1.6M |
|
2546
CALL
Regions Financial
RF
$26.3B
| $1.51M | ﹤0.01% |
75,100
+73,697
| +5,253% | +$1.59M |
|
2547
PUT
Fortive
FTV
$19B
| $1.51M | ﹤0.01% |
28,796
+27,903
| +3,125% | +$1.5M |
|
2548
CALL
Green Plains
GPRE
$1.19B
| $1.51M | ﹤0.01% |
45,000
+44,425
| +7,726% | +$1.33M |
|
|
PSXP
2549
CALL
DELISTED
PHILLIPS 66 PARTNERS LP
PSXP
| $1.51M | ﹤0.01% |
+38,300
| New | +$1.42M |
|
|
DFTX
2550
PUT
Definium Therapeutics
DFTX
$5.73B
| $1.51M | ﹤0.01% |
+29,193
| New | +$1.53M |
|
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.