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 | |
|---|---|---|---|---|---|---|
3226
CALL
Designer Brands
DBI
$298M
| $931K | ﹤0.01% |
56,300
+55,830
| +11,879% | +$983K |
|
|
SAGE
3227
CALL
DELISTED
Sage Therapeutics
SAGE
| $931K | ﹤0.01% |
16,400
+16,360
| +40,900% | +$1.16M |
|
|
FUV
3228
PUT
DELISTED
Arcimoto, Inc. Common Stock
FUV
| $931K | ﹤0.01% |
2,710
+2,669
| +6,510% | +$616K |
|
3229
CALL
Mattel
MAT
$4.3B
| $928K | ﹤0.01% |
46,200
+45,241
| +4,718% | +$934K |
|
3230
CALL
CarParts.com
PRTS
$39.7M
| $928K | ﹤0.01% |
4,560
+4,511
| +9,206% | +$755K |
|
|
BTAQ
3231
CALL
DELISTED
Burgundy Technology Acquisition Corporation Class A Ordinary shares
BTAQ
| $928K | ﹤0.01% |
94,300
+93,435
| +10,802% | +$927K |
|
3232
Revvity
RVTY
$12.1B
| $927K | ﹤0.01% |
6,004
+1,660
| +38% | +$233K |
|
3233
HF Sinclair
DINO
$16.4B
| $925K | ﹤0.01% |
28,134
+2,399
| +9% | +$83.4K |
|
3234
CALL
Equinox Gold
EQX
$7.51B
| $923K | ﹤0.01% |
132,900
+131,472
| +9,207% | +$1.12M |
|
3235
PUT
Oshkosh
OSK
$9.66B
| $922K | ﹤0.01% |
7,400
+7,034
| +1,922% | +$889K |
|
|
LFC
3236
CALL
DELISTED
China Life Insurance Company Ltd.
LFC
| $920K | ﹤0.01% |
92,500
+92,154
| +26,634% | +$944K |
|
3237
PUT
Cushman & Wakefield Ltd
CWK
$3.07B
| $917K | ﹤0.01% |
52,500
+52,488
| +437,400% | +$933K |
|
3238
iShares Gold Trust
IAU
$63.4B
| $917K | ﹤0.01% |
27,219
-98,532
| -78% | -$3.41M |
|
3239
PUT
NOV
NOV
$7.35B
| $917K | ﹤0.01% |
59,900
+59,491
| +14,545% | +$926K |
|
|
SNV
3240
CALL
DELISTED
Synovus
SNV
| $917K | ﹤0.01% |
20,900
+20,756
| +14,414% | +$975K |
|
3241
CALL
MSC Industrial Direct
MSM
$7.07B
| $915K | ﹤0.01% |
10,200
+10,181
| +53,584% | +$931K |
|
3242
PUT
Sphere Entertainment
SPHR
$5.01B
| $915K | ﹤0.01% |
10,900
+10,823
| +14,056% | +$958K |
|
3243
PUT
Upwork
UPWK
$1.14B
| $915K | ﹤0.01% |
15,700
+15,513
| +8,296% | +$729K |
|
|
CONE
3244
CALL
DELISTED
CyrusOne Inc Common Stock
CONE
| $915K | ﹤0.01% |
12,800
+12,721
| +16,103% | +$926K |
|
3245
PUT
Madison Square Garden
MSGS
$9.57B
| $914K | ﹤0.01% |
5,300
+5,236
| +8,181% | +$946K |
|
3246
CALL
The Honest Company
HNST
$423M
| $913K | ﹤0.01% |
+56,400
| New | +$943K |
|
3247
CALL
AllianceBernstein
AB
$3.54B
| $912K | ﹤0.01% |
19,600
+19,152
| +4,275% | +$834K |
|
3248
CALL
Arthur J. Gallagher & Co
AJG
$65.1B
| $910K | ﹤0.01% |
6,500
+6,408
| +6,965% | +$906K |
|
3249
Crown Castle
CCI
$32.4B
| $910K | ﹤0.01% |
+4,668
| New | +$874K |
|
3250
GrafTech
EAF
$203M
| $910K | ﹤0.01% |
7,832
+3,786
| +94% | +$475K |
|
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.