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 | |
|---|---|---|---|---|---|---|
7851
PUT
Cars.com
CARS
$723M
| $42K | ﹤0.01% |
3,000
+2,877
| +2,339% | +$40K |
|
7852
PUT
Custom Truck One Source
CTOS
$2.21B
| $42K | ﹤0.01% |
+4,500
| New | +$44.2K |
|
7853
CALL
DarioHealth
DRIO
$51.3M
| $42K | ﹤0.01% |
+100
| New | +$38.1K |
|
7854
CALL
Flotek Industries
FTK
$795M
| $42K | ﹤0.01% |
4,050
+4,012
| +10,558% | +$43.2K |
|
7855
CALL
Gladstone Capital
GLAD
$432M
| $42K | ﹤0.01% |
1,850
+1,811
| +4,644% | +$40K |
|
7856
CALL
Hawaiian Electric Industries
HE
$2.26B
| $42K | ﹤0.01% |
1,000
+688
| +221% | +$29.8K |
|
7857
CALL
Huazhu Hotels Group
HTHT
$13.3B
| $42K | ﹤0.01% |
800
+778
| +3,536% | +$43.9K |
|
7858
PUT
Kirby Corp
KEX
$7.16B
| $42K | ﹤0.01% |
700
+631
| +914% | +$40.7K |
|
7859
PUT
Liberty Latin America Class C
LILAK
$1.64B
| $42K | ﹤0.01% |
3,410
+3,386
| +14,108% | +$43.5K |
|
|
NGD
7860
DELISTED
New Gold Inc
NGD
| $42K | ﹤0.01% |
23,366
-27,389
| -54% | -$51.6K |
|
7861
PUT
Northwest Natural Holdings
NWN
$2.16B
| $42K | ﹤0.01% |
800
+767
| +2,324% | +$41.5K |
|
7862
CALL
OppFi
OPFI
$816M
| $42K | ﹤0.01% |
72,100
+72,090
| +720,900% | +$733K |
|
7863
CALL
Pacira BioSciences
PCRX
$1.04B
| $42K | ﹤0.01% |
700
+692
| +8,650% | +$43.8K |
|
7864
Invesco NASDAQ 100 ETF
QQQM
$94B
| $42K | ﹤0.01% |
294
+122
| +71% | +$16.9K |
|
7865
CALL
Rogers Communications
RCI
$19B
| $42K | ﹤0.01% |
800
+531
| +197% | +$26.8K |
|
|
7866
PUT
Rogers Communications
RCI
$19B
| $42K | ﹤0.01% |
800
+756
| +1,718% | +$38.1K |
|
7867
PUT
RCM Technologies
RCMT
$206M
| $42K | ﹤0.01% |
10,300
+10,186
| +8,935% | +$37.4K |
|
|
REVG
7868
PUT
DELISTED
REV Group
REVG
| $42K | ﹤0.01% |
2,700
+2,699
| +269,900% | +$48.9K |
|
7869
CALL
Vericel Corp
VCEL
$2.34B
| $42K | ﹤0.01% |
800
+770
| +2,567% | +$43.9K |
|
7870
PUT
Vicor
VICR
$8.29B
| $42K | ﹤0.01% |
400
+377
| +1,639% | +$33.5K |
|
7871
CALL
ZipRecruiter
ZIP
$348M
| $42K | ﹤0.01% |
+1,700
| New | +$38.5K |
|
|
ERF
7872
DELISTED
Enerplus Corporation
ERF
| $42K | ﹤0.01% |
+5,916
| New | +$36.5K |
|
|
CCLP
7873
CALL
DELISTED
CSI Compressco LP
CCLP
| $42K | ﹤0.01% |
23,200
+22,968
| +9,900% | +$41K |
|
|
FGH
7874
CALL
DELISTED
FG Group Holdings Inc.
FGH
| $42K | ﹤0.01% |
+8,900
| New | +$41K |
|
|
CORR
7875
PUT
DELISTED
CorEnergy Infrastructure Trust, Inc.
CORR
| $42K | ﹤0.01% |
6,400
+6,265
| +4,641% | +$40.1K |
|
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.