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 | |
|---|---|---|---|---|---|---|
|
ATHX
5851
DELISTED
Athersys, Inc. Common Stock
ATHX
| $180K | ﹤0.01% |
5,003
-8,150
| -62% | -$335K |
|
|
TREC
5852
PUT
DELISTED
Trecora Resources
TREC
| $180K | ﹤0.01% |
21,700
+21,444
| +8,377% | +$172K |
|
|
INFO
5853
CALL
DELISTED
IHS Markit Ltd. Common Shares
INFO
| $180K | ﹤0.01% |
1,600
+1,386
| +648% | +$147K |
|
5854
Gaotu Techedu
GOTU
$434M
| $179K | ﹤0.01% |
12,152
-38,489
| -76% | -$858K |
|
5855
PUT
The Honest Company
HNST
$402M
| $179K | ﹤0.01% |
+11,100
| New | +$186K |
|
5856
IZEA Worldwide
IZEA
$60.6M
| $179K | ﹤0.01% |
17,594
-2,433
| -12% | -$31.9K |
|
|
LOVE
5857
DELISTED
LoveSac
LOVE
| $179K | ﹤0.01% |
2,251
-9,433
| -81% | -$702K |
|
5858
News Corp Class A
NWSA
$14.9B
| $179K | ﹤0.01% |
6,959
+1,612
| +30% | +$42.5K |
|
|
PRPH
5859
CALL
DELISTED
ProPhase Labs
PRPH
| $179K | ﹤0.01% |
+2,900
| New | +$163K |
|
5860
PUT
Pixelworks
PXLW
$38.2M
| $179K | ﹤0.01% |
4,383
+4,338
| +9,640% | +$170K |
|
5861
PUT
Repligen
RGEN
$7.96B
| $179K | ﹤0.01% |
+900
| New | +$175K |
|
5862
CALL
Rapid7
RPD
$645M
| $179K | ﹤0.01% |
1,900
+1,815
| +2,135% | +$153K |
|
|
SHYF
5863
CALL
DELISTED
The Shyft Group
SHYF
| $179K | ﹤0.01% |
4,800
+4,691
| +4,304% | +$177K |
|
5864
CALL
Accel Entertainment
ACEL
$978M
| $178K | ﹤0.01% |
15,000
+14,844
| +9,515% | +$184K |
|
5865
PUT
Capital Southwest
CSWC
$1.47B
| $178K | ﹤0.01% |
7,700
+7,648
| +14,708% | +$190K |
|
|
GPMT
5866
PUT
Granite Point Mortgage Trust
GPMT
$69M
| $178K | ﹤0.01% |
12,100
+11,838
| +4,518% | +$163K |
|
5867
Innovative Industrial Properties
IIPR
$1.71B
| $178K | ﹤0.01% |
936
-2,292
| -71% | -$420K |
|
|
LAND
5868
CALL
Gladstone Land Corp
LAND
$350M
| $178K | ﹤0.01% |
7,400
+7,354
| +15,987% | +$166K |
|
5869
CALL
Turning Point Brands
TPB
$1.45B
| $178K | ﹤0.01% |
3,900
+3,823
| +4,965% | +$177K |
|
5870
CALL
UFP Industries
UFPI
$4.9B
| $178K | ﹤0.01% |
2,400
+2,371
| +8,176% | +$187K |
|
|
VRTV
5871
CALL
DELISTED
VERITIV CORPORATION
VRTV
| $178K | ﹤0.01% |
2,900
+2,884
| +18,025% | +$151K |
|
5872
Cushman & Wakefield Ltd
CWK
$3.14B
| $177K | ﹤0.01% |
10,165
+9,720
| +2,184% | +$173K |
|
5873
CALL
Fusion Fuel Green
HTOO
$18.7M
| $177K | ﹤0.01% |
+351
| New | +$161K |
|
5874
CALL
Kemper
KMPR
$1.67B
| $177K | ﹤0.01% |
2,400
+2,399
| +239,900% | +$185K |
|
|
SVM
5875
CALL
Silvercorp Metals
SVM
$2.07B
| $177K | ﹤0.01% |
32,300
+31,996
| +10,525% | +$186K |
|
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.