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 | |
|---|---|---|---|---|---|---|
|
VLTA
2601
DELISTED
Volta Inc.
VLTA
| $1.46M | ﹤0.01% |
+145,590
| New | +$1.48M |
|
|
AVYA
2602
PUT
DELISTED
Avaya Holdings Corp. Common Stock
AVYA
| $1.46M | ﹤0.01% |
54,200
+53,965
| +22,964% | +$1.52M |
|
2603
AvePoint
AVPT
$2.6B
| $1.45M | ﹤0.01% |
118,738
+61,316
| +107% | +$670K |
|
2604
PUT
Magna International
MGA
$17.9B
| $1.45M | ﹤0.01% |
15,700
+15,540
| +9,713% | +$1.48M |
|
2605
CALL
IQVIA
IQV
$34.7B
| $1.45M | ﹤0.01% |
6,000
+5,905
| +6,216% | +$1.36M |
|
2606
PUT
Lattice Semiconductor
LSCC
$17.6B
| $1.45M | ﹤0.01% |
25,800
+25,583
| +11,789% | +$1.31M |
|
2607
Global X Silver Miners ETF NEW
SIL
$4.08B
| $1.45M | ﹤0.01% |
33,936
+14,902
| +78% | +$671K |
|
|
DVAX
2608
PUT
DELISTED
Dynavax Technologies
DVAX
| $1.45M | ﹤0.01% |
+146,900
| New | +$1.34M |
|
2609
PUT
EQT Corp
EQT
$33.2B
| $1.44M | ﹤0.01% |
64,900
+64,448
| +14,258% | +$1.3M |
|
|
TTM.RT
2610
CALL
DELISTED
TATA MOTORS LIMITED RT PUR ADR
TTM.RT
| $1.44M | ﹤0.01% |
63,400
+62,254
| +5,432% | +$1.42M |
|
2611
PUT
Hyliion Holdings
HYLN
$663M
| $1.44M | ﹤0.01% |
123,800
+123,048
| +16,363% | +$1.29M |
|
|
NVTA
2612
DELISTED
Invitae Corporation
NVTA
| $1.44M | ﹤0.01% |
42,713
+4,784
| +13% | +$156K |
|
|
HOME
2613
PUT
DELISTED
At Home Group Inc.
HOME
| $1.44M | ﹤0.01% |
39,100
+38,450
| +5,915% | +$1.31M |
|
2614
CALL
Lightspeed Commerce
LSPD
$1.3B
| $1.44M | ﹤0.01% |
17,200
+17,180
| +85,900% | +$1.21M |
|
2615
PUT
Aurinia Pharmaceuticals
AUPH
$1.97B
| $1.44M | ﹤0.01% |
+110,800
| New | +$1.41M |
|
2616
CALL
Brunswick
BC
$5.19B
| $1.43M | ﹤0.01% |
14,400
+14,240
| +8,900% | +$1.45M |
|
2617
Wabtec
WAB
$51.1B
| $1.43M | ﹤0.01% |
17,429
+11,108
| +176% | +$902K |
|
|
HAAC
2618
PUT
DELISTED
Health Assurance Acquisition Corp. Class A Common Stock
HAAC
| $1.43M | ﹤0.01% |
143,300
+142,227
| +13,255% | +$1.45M |
|
2619
TG Therapeutics
TGTX
$8.58B
| $1.43M | ﹤0.01% |
36,947
+28,743
| +350% | +$1.13M |
|
2620
PUT
UBS Group
UBS
$170B
| $1.43M | ﹤0.01% |
93,300
+92,926
| +24,847% | +$1.47M |
|
2621
CALL
AngloGold Ashanti
AU
$40.3B
| $1.43M | ﹤0.01% |
+77,000
| New | +$1.69M |
|
|
EMBJ
2622
PUT
Embraer S.A. ADS
EMBJ
$11.6B
| $1.43M | ﹤0.01% |
+94,500
| New | +$1.22M |
|
|
MASI
2623
PUT
DELISTED
Masimo
MASI
| $1.43M | ﹤0.01% |
5,900
+5,898
| +294,900% | +$1.35M |
|
2624
AST SpaceMobile
ASTS
$16.8B
| $1.43M | ﹤0.01% |
+110,501
| New | +$995K |
|
2625
CALL
Enovis
ENOV
$1.56B
| $1.43M | ﹤0.01% |
18,127
+18,111
| +113,194% | +$1.39M |
|
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.