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 | |
|---|---|---|---|---|---|---|
3326
PUT
FirstEnergy
FE
$28.5B
| $863K | ﹤0.01% |
23,200
+22,785
| +5,490% | +$847K |
|
3327
CALL
Nabors Industries
NBR
$1.16B
| $863K | ﹤0.01% |
18,800
+18,735
| +28,823% | +$1.88M |
|
3328
Invesco DB US Dollar Index Bearish Fund
UDN
$107M
| $863K | ﹤0.01% |
40,974
-5,562
| -12% | -$119K |
|
|
AUY
3329
DELISTED
Yamana Gold, Inc.
AUY
| $863K | ﹤0.01% |
204,611
-51,071
| -20% | -$247K |
|
3330
Outfront Media
OUT
$5.68B
| $861K | ﹤0.01% |
+36,423
| New | +$844K |
|
|
SUP
3331
DELISTED
Superior Industries International
SUP
| $861K | ﹤0.01% |
99,946
+91,339
| +1,061% | +$627K |
|
3332
Fluor
FLR
$7.22B
| $860K | ﹤0.01% |
48,631
-65,095
| -57% | -$1.34M |
|
3333
GFL Environmental
GFL
$14.1B
| $860K | ﹤0.01% |
26,965
+21,228
| +370% | +$695K |
|
3334
PUT
Leslie's
LESL
$10.8M
| $860K | ﹤0.01% |
1,565
+1,560
| +31,200% | +$856K |
|
|
RPT
3335
CALL
DELISTED
RPT Realty Common Shares of Beneficial Interest (MD)
RPT
| $860K | ﹤0.01% |
+66,300
| New | +$842K |
|
3336
CALL
Fortuna Silver Mines
FSM
$2.59B
| $859K | ﹤0.01% |
154,900
+153,952
| +16,240% | +$1.02M |
|
|
BBL
3337
DELISTED
BHP Group Plc American Depositary Shares (Each representing two Ordinary Shares)
BBL
| $859K | ﹤0.01% |
14,401
-1,468
| -9% | -$89.7K |
|
3338
PUT
Axos Financial
AX
$5.45B
| $858K | ﹤0.01% |
18,500
+18,254
| +7,420% | +$853K |
|
3339
CALL
Ball Corp
BALL
$17.2B
| $858K | ﹤0.01% |
10,600
+10,213
| +2,639% | +$885K |
|
3340
PUT
CleanSpark
CLSK
$3.6B
| $858K | ﹤0.01% |
51,600
+50,504
| +4,608% | +$927K |
|
|
SHLX
3341
CALL
DELISTED
Shell Midstream Partners, L.P.
SHLX
| $858K | ﹤0.01% |
58,100
+57,697
| +14,317% | +$865K |
|
|
FMAC
3342
PUT
DELISTED
FirstMark Horizon Acquisition Corp.
FMAC
| $858K | ﹤0.01% |
86,500
+84,132
| +3,553% | +$838K |
|
|
AZEK
3343
PUT
DELISTED
The AZEK Co
AZEK
| $857K | ﹤0.01% |
20,200
+20,033
| +11,996% | +$898K |
|
3344
CALL
Bakkt Inc
BKKT
$338M
| $857K | ﹤0.01% |
3,428
+3,358
| +4,797% | +$924K |
|
|
EFC
3345
CALL
Ellington Financial
EFC
$1.68B
| $857K | ﹤0.01% |
44,800
+43,909
| +4,928% | +$812K |
|
|
ONC
3346
PUT
BeOne Medicines Ltd
ONC
$33.8B
| $857K | ﹤0.01% |
2,500
+2,458
| +5,852% | +$814K |
|
|
KUST
3347
CALL
Kustom Entertainment Inc
KUST
$721K
| $856K | ﹤0.01% |
+1
| New | +$1.07M |
|
3348
Root
ROOT
$944M
| $856K | ﹤0.01% |
+4,399
| New | +$831K |
|
3349
CALL
HF Sinclair
DINO
$16.4B
| $855K | ﹤0.01% |
26,000
+25,832
| +15,376% | +$898K |
|
3350
Madison Square Garden
MSGS
$9.57B
| $855K | ﹤0.01% |
4,959
-778
| -14% | -$141K |
|
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.