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 | |
|---|---|---|---|---|---|---|
|
TTOO
7751
CALL
DELISTED
T2 Biosystems, Inc
TTOO
| $46K | ﹤0.01% |
+8
| New | +$51.7K |
|
|
VIA
7752
PUT
DELISTED
Via Renewables, Inc. Class A Common Stock
VIA
| $46K | ﹤0.01% |
820
+796
| +3,317% | +$42.5K |
|
|
VNTR
7753
PUT
DELISTED
Venator Materials PLC
VNTR
| $46K | ﹤0.01% |
9,800
+9,696
| +9,323% | +$46.5K |
|
|
PLXP
7754
DELISTED
PLx Pharma Inc. Common Stock
PLXP
| $46K | ﹤0.01% |
+3,374
| New | +$40K |
|
|
SJR
7755
PUT
DELISTED
Shaw Communications Inc.
SJR
| $46K | ﹤0.01% |
1,600
+1,583
| +9,312% | +$45.7K |
|
|
CVET
7756
DELISTED
Covetrus, Inc. Common Stock
CVET
| $46K | ﹤0.01% |
1,728
-11,155
| -87% | -$312K |
|
|
QTS
7757
PUT
DELISTED
QTS REALTY TRUST, INC.
QTS
| $46K | ﹤0.01% |
600
+597
| +19,900% | +$40.6K |
|
|
BHR
7758
PUT
Braemar Hotels & Resorts
BHR
$163M
| $45K | ﹤0.01% |
7,300
+7,176
| +5,787% | +$44.2K |
|
7759
PUT
Cato Corp
CATO
$65.7M
| $45K | ﹤0.01% |
2,700
+2,659
| +6,485% | +$39.4K |
|
7760
CALL
Cabot Corp
CBT
$4.72B
| $45K | ﹤0.01% |
800
+783
| +4,606% | +$46K |
|
7761
PUT
CNA Financial
CNA
$14.9B
| $45K | ﹤0.01% |
1,000
+983
| +5,782% | +$46.1K |
|
7762
CALL
CRH
CRH
$66.6B
| $45K | ﹤0.01% |
900
+884
| +5,525% | +$44.2K |
|
7763
Evogene
EVGN
$5.83M
| $45K | ﹤0.01% |
1,318
-525
| -28% | -$20.6K |
|
|
FENG
7764
CALL
Phoenix New Media
FENG
$17.5M
| $45K | ﹤0.01% |
4,850
+4,788
| +7,723% | +$47.6K |
|
7765
PUT
Genpact
G
$6.22B
| $45K | ﹤0.01% |
1,000
+919
| +1,135% | +$41.6K |
|
7766
Gladstone Capital
GLAD
$427M
| $45K | ﹤0.01% |
+1,997
| New | +$44.1K |
|
7767
PUT
InflaRx
IFRX
$243M
| $45K | ﹤0.01% |
15,200
+15,151
| +30,920% | +$50.2K |
|
7768
PUT
Inspired Entertainment
INSE
$183M
| $45K | ﹤0.01% |
+3,600
| New | +$36.2K |
|
|
KZIA
7769
Kazia Therapeutics
KZIA
$137M
| $45K | ﹤0.01% |
+92
| New | +$48.5K |
|
7770
CALL
Lands' End
LE
$378M
| $45K | ﹤0.01% |
1,100
+1,045
| +1,900% | +$28.5K |
|
7771
PUT
Dorian LPG
LPG
$1.96B
| $45K | ﹤0.01% |
3,200
+3,109
| +3,416% | +$43.5K |
|
|
PGRE
7772
DELISTED
Paramount Group
PGRE
| $45K | ﹤0.01% |
4,487
-7,124
| -61% | -$75.8K |
|
7773
PUT
SITE Centers
SITC
$236M
| $45K | ﹤0.01% |
3,845
+3,778
| +5,639% | +$43.3K |
|
7774
PUT
Bio-Techne
TECH
$11.2B
| $45K | ﹤0.01% |
400
+396
| +9,900% | +$41.7K |
|
7775
PUT
Vanda Pharmaceuticals
VNDA
$304M
| $45K | ﹤0.01% |
2,100
+2,005
| +2,111% | +$35.9K |
|
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.