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 | |
|---|---|---|---|---|---|---|
|
TRIL
3276
CALL
DELISTED
Trillium Therapeutics Inc.
TRIL
| $897K | ﹤0.01% |
92,500
+91,274
| +7,445% | +$859K |
|
|
GBT
3277
CALL
DELISTED
Global Blood Therapeutics, Inc.
GBT
| $896K | ﹤0.01% |
25,600
+25,280
| +7,900% | +$987K |
|
|
TRHC
3278
PUT
DELISTED
Tabula Rasa HealthCare, Inc. Common Stock
TRHC
| $895K | ﹤0.01% |
17,900
+17,778
| +14,572% | +$796K |
|
3279
Atossa Therapeutics
ATOS
$23.5M
| $894K | ﹤0.01% |
+9,436
| New | +$500K |
|
3280
PUT
Annaly Capital Management
NLY
$16.9B
| $894K | ﹤0.01% |
25,175
+24,761
| +5,981% | +$899K |
|
3281
PUT
Rigel Pharmaceuticals
RIGL
$692M
| $894K | ﹤0.01% |
20,600
+20,424
| +11,605% | +$771K |
|
3282
CALL
Ligand Pharmaceuticals
LGND
$5.96B
| $892K | ﹤0.01% |
10,900
+10,829
| +15,252% | +$901K |
|
3283
CALL
Q2 Holdings
QTWO
$3.64B
| $892K | ﹤0.01% |
8,700
+8,663
| +23,414% | +$867K |
|
3284
CALL
BorgWarner
BWA
$13.1B
| $891K | ﹤0.01% |
20,874
+20,053
| +2,443% | +$883K |
|
3285
Enova International
ENVA
$6.27B
| $891K | ﹤0.01% |
+26,070
| New | +$918K |
|
3286
iShares MSCI United Kingdom ETF
EWU
$4.05B
| $891K | ﹤0.01% |
27,261
+20,360
| +295% | +$675K |
|
3287
Starbucks
SBUX
$118B
| $891K | ﹤0.01% |
7,975
+7,775
| +3,888% | +$879K |
|
3288
PUT
Henry Schein
HSIC
$9.64B
| $890K | ﹤0.01% |
12,000
+11,703
| +3,940% | +$882K |
|
3289
PUT
Motorola Solutions
MSI
$70.3B
| $889K | ﹤0.01% |
4,100
+4,087
| +31,438% | +$816K |
|
3290
Vuzix
VUZI
$193M
| $889K | ﹤0.01% |
48,491
+16,666
| +52% | +$336K |
|
|
PING
3291
CALL
DELISTED
Ping Identity Holding Corp.
PING
| $888K | ﹤0.01% |
38,800
+38,689
| +34,855% | +$912K |
|
3292
CALL
Canadian National Railway
CNI
$78B
| $886K | ﹤0.01% |
8,400
+8,367
| +25,355% | +$924K |
|
3293
CALL
Vanguard FTSE Developed Markets ETF
VEA
$227B
| $886K | ﹤0.01% |
17,200
+17,183
| +101,076% | +$887K |
|
|
BFX
3294
CALL
DELISTED
BowFlex Inc.
BFX
| $886K | ﹤0.01% |
52,600
+50,235
| +2,124% | +$847K |
|
|
CRON
3295
CALL
Cronos Group
CRON
$1.07B
| $885K | ﹤0.01% |
103,000
+101,211
| +5,657% | +$837K |
|
|
BRSL
3296
PUT
Brightstar Lottery PLC
BRSL
$1.93B
| $884K | ﹤0.01% |
36,900
+36,770
| +28,285% | +$770K |
|
|
HOME
3297
DELISTED
At Home Group Inc.
HOME
| $884K | ﹤0.01% |
23,998
+4,598
| +24% | +$157K |
|
3298
Teradata
TDC
$2.8B
| $881K | ﹤0.01% |
17,634
-32,973
| -65% | -$1.5M |
|
|
BBIG
3299
DELISTED
Vinco Ventures, Inc. Common Stock
BBIG
| $881K | ﹤0.01% |
+16,404
| New | +$706K |
|
|
PPLI
3300
CALL
People Inc
PPLI
$3.15B
| $879K | ﹤0.01% |
11,946
+11,052
| +1,236% | +$1.43M |
|
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.