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 | |
|---|---|---|---|---|---|---|
2876
PUT
SEI Investments
SEIC
$12.2B
| $1.17M | ﹤0.01% |
18,900
+18,893
| +269,900% | +$1.18M |
|
|
SGEN
2877
DELISTED
Seagen Inc. Common Stock
SGEN
| $1.17M | ﹤0.01% |
7,411
+3,302
| +80% | +$491K |
|
2878
Ball Corp
BALL
$17.2B
| $1.17M | ﹤0.01% |
14,440
+8,652
| +149% | +$749K |
|
2879
Kinder Morgan
KMI
$70.7B
| $1.17M | ﹤0.01% |
+64,074
| New | +$1.14M |
|
2880
CALL
Kartoon Studios
TOON
$34.9M
| $1.17M | ﹤0.01% |
63,370
+62,784
| +10,714% | +$1.1M |
|
2881
PUT
Innovative Industrial Properties
IIPR
$1.78B
| $1.17M | ﹤0.01% |
6,100
+5,768
| +1,737% | +$1.06M |
|
2882
PUT
Olin
OLN
$2.49B
| $1.17M | ﹤0.01% |
+25,200
| New | +$1.13M |
|
2883
PUT
Taylor Morrison
TMHC
| $1.17M | ﹤0.01% |
44,100
+43,659
| +9,900% | +$1.3M |
|
2884
CALL
uniQure
QURE
$2.63B
| $1.16M | ﹤0.01% |
37,800
+37,542
| +14,551% | +$1.26M |
|
2885
PUT
Kimco Realty
KIM
$17.8B
| $1.16M | ﹤0.01% |
55,800
+55,364
| +12,698% | +$1.15M |
|
2886
Aurinia Pharmaceuticals
AUPH
$1.96B
| $1.16M | ﹤0.01% |
89,599
+59,213
| +195% | +$754K |
|
2887
Baker Hughes
BKR
$60.1B
| $1.16M | ﹤0.01% |
+50,732
| New | +$1.17M |
|
|
DADA
2888
CALL
DELISTED
Dada Nexus
DADA
| $1.16M | ﹤0.01% |
40,000
+39,382
| +6,372% | +$1.02M |
|
2889
PUT
MarineMax
HZO
$799M
| $1.16M | ﹤0.01% |
23,800
+23,739
| +38,916% | +$1.24M |
|
|
MMAT
2890
PUT
DELISTED
Meta Materials Inc. Common Stock
MMAT
| $1.16M | ﹤0.01% |
+2,558
| New | +$1.43M |
|
2891
CoreCivic
CXW
$3.09B
| $1.16M | ﹤0.01% |
110,403
+22,588
| +26% | +$203K |
|
|
PVG
2892
CALL
DELISTED
PRETIUM RESOURCES INC.
PVG
| $1.15M | ﹤0.01% |
120,800
+119,209
| +7,493% | +$1.3M |
|
2893
CALL
Acadia Pharmaceuticals
ACAD
$4.35B
| $1.15M | ﹤0.01% |
47,300
+46,460
| +5,531% | +$1.05M |
|
2894
CALL
Canadian Natural Resources
CNQ
$93.4B
| $1.15M | ﹤0.01% |
+64,936
| New | +$1.07M |
|
2895
Lithia Motors
LAD
$7.88B
| $1.15M | ﹤0.01% |
3,356
+1,123
| +50% | +$406K |
|
2896
United Rentals
URI
$70.2B
| $1.15M | ﹤0.01% |
3,616
-828
| -19% | -$267K |
|
|
ZEV
2897
CALL
DELISTED
Lightning eMotors, Inc.
ZEV
| $1.15M | ﹤0.01% |
6,940
+6,779
| +4,211% | +$1.16M |
|
2898
CALL
IonQ
IONQ
$13.4B
| $1.15M | ﹤0.01% |
107,800
+107,119
| +15,730% | +$1.11M |
|
|
GES
2899
CALL
DELISTED
Guess Inc
GES
| $1.15M | ﹤0.01% |
43,600
+43,320
| +15,471% | +$1.2M |
|
2900
PUT
American Electric Power
AEP
$72.7B
| $1.15M | ﹤0.01% |
13,600
+13,520
| +16,900% | +$1.16M |
|
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.