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 |
State Street Financial Select Sector SPDR ETF
XLF
|
+$42.6M |
| 2 |
Shopify
SHOP
|
+$39.6M |
| 3 |
iShares China Large-Cap ETF
FXI
|
+$35.4M |
| 4 |
Verizon
VZ
|
+$34.1M |
| 5 |
KraneShares CSI China Internet ETF
KWEB
|
+$34.1M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
AMC Entertainment Holdings
AMC
|
+$49.5M |
| 2 |
GE Aerospace
GE
|
+$35.2M |
| 3 |
Carnival Corporation Ltd
CCL
|
+$30.5M |
| 4 |
Advanced Micro Devices
AMD
|
+$28.8M |
| 5 |
Micron Technology
MU
|
+$23.7M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.61% |
| 2 | Consumer Discretionary | 0.43% |
| 3 | Healthcare | 0.35% |
| 4 | Communication Services | 0.23% |
| 5 | Financials | 0.21% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
PTR
4401
CALL
DELISTED
PETROCHINA COMPANY LIMITED ADS (REP 100 H SHARES)
PTR
| $331K | ﹤0.01% |
7,500
-1,400
| -16% | -$65.9K |
|
|
SC
4402
PUT
DELISTED
SANTANDER CONSUMER USA HOLDINGS INC
SC
| $331K | ﹤0.01% |
7,900
-11,700
| -60% | -$490K |
|
4403
CALL
The Greenbrier Companies
GBX
$1.52B
| $330K | ﹤0.01% |
7,200
-8,600
| -54% | -$373K |
|
4404
PUT
Independence Realty Trust
IRT
$3.92B
| $330K | ﹤0.01% |
12,800
+11,000
| +611% | +$260K |
|
|
MRC
4405
DELISTED
MRC Global
MRC
| $330K | ﹤0.01% |
+47,997
| New | +$376K |
|
4406
PUT
CVR Partners
UAN
$1.36B
| $330K | ﹤0.01% |
4,000
-13,400
| -77% | -$1.06M |
|
|
STOR
4407
PUT
DELISTED
STORE Capital Corporation
STOR
| $330K | ﹤0.01% |
9,600
-13,300
| -58% | -$452K |
|
4408
CALL
Avnet
AVT
$7.29B
| $329K | ﹤0.01% |
8,000
+2,800
| +54% | +$108K |
|
4409
PUT
Carlyle Group
CG
$16.6B
| $329K | ﹤0.01% |
6,000
+500
| +9% | +$27.2K |
|
4410
Payoneer
PAYO
$2.42B
| $329K | ﹤0.01% |
44,775
-9,016
| -17% | -$69.3K |
|
4411
CALL
Companhia Siderúrgica Nacional
SID
$1.31B
| $329K | ﹤0.01% |
74,200
-79,700
| -52% | -$346K |
|
4412
Welltower
WELL
$169B
| $329K | ﹤0.01% |
+3,846
| New | +$321K |
|
|
KLR
4413
PUT
DELISTED
Kaleyra, Inc.
KLR
| $329K | ﹤0.01% |
9,371
+8,200
| +700% | +$312K |
|
4414
Global X FinTech ETF
FINX
$170M
| $328K | ﹤0.01% |
8,198
+7,449
| +995% | +$353K |
|
4415
GameStop
GME
$9.75B
| $328K | ﹤0.01% |
8,844
-73,972
| -89% | -$3.36M |
|
4416
PUT
Veritone
VERI
$101M
| $328K | ﹤0.01% |
14,600
+12,800
| +711% | +$329K |
|
|
CZOO
4417
CALL
DELISTED
Cazoo Group Ltd
CZOO
| $328K | ﹤0.01% |
+27
| New | +$417K |
|
4418
CALL
Brown-Forman Class B
BF.B
$13.2B
| $327K | ﹤0.01% |
4,500
+3,300
| +275% | +$235K |
|
|
CARM
4419
PUT
DELISTED
Carisma Therapeutics
CARM
| $327K | ﹤0.01% |
20,085
+17,900
| +819% | +$360K |
|
4420
CALL
EPR Properties
EPR
$4.75B
| $327K | ﹤0.01% |
6,900
-24,500
| -78% | -$1.22M |
|
4421
Lufax Holding
LU
$1.35B
| $327K | ﹤0.01% |
+14,521
| New | +$380K |
|
4422
CALL
Vail Resorts
MTN
$5.32B
| $327K | ﹤0.01% |
1,000
-1,500
| -60% | -$511K |
|
|
EH
4423
CALL
EHang Holdings
EH
$389M
| $326K | ﹤0.01% |
21,900
-15,900
| -42% | -$334K |
|
4424
PUT
Monster Beverage
MNST
$94.3B
| $326K | ﹤0.01% |
6,800
-5,600
| -45% | -$249K |
|
|
SUPV
4425
CALL
Grupo Supervielle
SUPV
$828M
| $326K | ﹤0.01% |
167,600
+119,900
| +251% | +$257K |
|
Similar funds
Simplex Trading's Q4 2021 Portfolio in Review
As of Q4 2021, Simplex Trading held 12,077 positions worth $99B, down 7.5% from $107B the previous quarter. Its ten largest holdings account for 33% of the portfolio.
Simplex Trading withdrew a net $10.8B in Q4 2021, closing 1,645 positions and reducing 4,258 holdings. Its most notable exit was Carnival Corporation Ltd, an estimated $30.5M position sold in full.
By sector, the portfolio is most concentrated in Technology at 0.61% of assets, up from 0.49% a quarter earlier, followed by Consumer Discretionary and Healthcare.
Against the trend, Simplex Trading opened a new position in iShares China Large-Cap ETF worth $33M.
- Simplex Trading's largest Q4 2021 buy was iShares China Large-Cap ETF: 902,666 shares worth $33M.
- Simplex Trading added most to State Street Financial Select Sector SPDR ETF in Q4 2021, an estimated $42.6M increase.
- Simplex Trading's biggest Q4 2021 reduction was AMC Entertainment Holdings, cutting an estimated $49.5M.
- Simplex Trading fully exited Carnival Corporation Ltd in Q4 2021, selling an estimated $30.5M.
- Simplex Trading's ten largest holdings make up 33% of its $99B portfolio in Q4 2021.
- Simplex Trading opened 2,269 new positions and closed 1,645 in Q4 2021.
- Simplex Trading's portfolio value fell 7.5% quarter-over-quarter to $99B.
Based on Simplex Trading's 13F filing for Q4 2021, filed 4 Feb 2022.