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 | |
|---|---|---|---|---|---|---|
5351
abrdn Physical Silver Shares ETF
SIVR
$4.11B
| $244K | ﹤0.01% |
9,719
-10,243
| -51% | -$264K |
|
5352
CALL
AgEagle Aerial Systems
UAVS
$41.9M
| $244K | ﹤0.01% |
46
+45
| +4,500% | +$247K |
|
5353
AdvisorShares Pure Cannabis ETF
YOLO
$30M
| $244K | ﹤0.01% |
11,574
-29,478
| -72% | -$620K |
|
|
SMAR
5354
DELISTED
Smartsheet Inc.
SMAR
| $244K | ﹤0.01% |
+3,383
| New | +$211K |
|
5355
Alliance Resource Partners
ARLP
$3.37B
| $243K | ﹤0.01% |
33,778
+6,474
| +24% | +$40.6K |
|
5356
Compugen
CGEN
$220M
| $243K | ﹤0.01% |
29,367
+11,585
| +65% | +$94.1K |
|
5357
Citi Trends
CTRN
$565M
| $243K | ﹤0.01% |
2,804
-94
| -3% | -$8.65K |
|
5358
Gen Digital
GEN
$16.3B
| $243K | ﹤0.01% |
8,934
-48,027
| -84% | -$1.2M |
|
5359
CALL
Marker Therapeutics
MRKR
$18.7M
| $243K | ﹤0.01% |
8,720
+8,694
| +33,438% | +$229K |
|
5360
Omega Healthcare
OHI
$15.1B
| $243K | ﹤0.01% |
+6,700
| New | +$249K |
|
5361
PUT
United States Gasoline Fund
UGA
$142M
| $243K | ﹤0.01% |
6,800
+6,736
| +10,525% | +$228K |
|
|
ZEPP
5362
CALL
Zepp Health
ZEPP
$64.8M
| $243K | ﹤0.01% |
5,175
+5,114
| +8,384% | +$213K |
|
|
ERF
5363
CALL
DELISTED
Enerplus Corporation
ERF
| $243K | ﹤0.01% |
33,900
+33,427
| +7,067% | +$206K |
|
|
ARD
5364
DELISTED
Ardagh Group S.A. Class A Common Shares
ARD
| $243K | ﹤0.01% |
9,928
-4,793
| -33% | -$124K |
|
|
FRSX
5365
CALL
Foresight Autonomous Holdings
FRSX
$3.81M
| $242K | ﹤0.01% |
453
+451
| +22,550% | +$258K |
|
5366
PUT
Viking Therapeutics
VKTX
$3.86B
| $242K | ﹤0.01% |
40,500
+39,929
| +6,993% | +$237K |
|
|
ABK
5367
PUT
DELISTED
Ambac Financial Group
ABK
| $242K | ﹤0.01% |
15,500
+15,141
| +4,218% | +$236K |
|
|
FRMM
5368
PUT
Forum Markets
FRMM
$70.9M
| $241K | ﹤0.01% |
+6
| New | +$211K |
|
5369
PUT
DMC Global
BOOM
$129M
| $241K | ﹤0.01% |
4,300
+4,199
| +4,157% | +$231K |
|
5370
PUT
Nordson
NDSN
$16.4B
| $241K | ﹤0.01% |
1,100
+1,096
| +27,400% | +$232K |
|
5371
CALL
BRC Group Holdings
RILY
$282M
| $241K | ﹤0.01% |
3,200
+3,049
| +2,019% | +$213K |
|
|
XXII
5372
22nd Century Group
XXII
$1.34M
| – | – |
0
| – | – |
|
|
COW
5373
DELISTED
iPath Series B Bloomberg Livestock Subindex Total ReturnSM ETN
COW
| $241K | ﹤0.01% |
6,383
-537
| -8% | -$20.6K |
|
5374
PUT
Atomera
ATOM
$197M
| $240K | ﹤0.01% |
11,200
+11,170
| +37,233% | +$229K |
|
5375
Direxion Daily Healthcare Bull 3X ETF
CURE
$181M
| $240K | ﹤0.01% |
2,296
+1,093
| +91% | +$105K |
|
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.