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 | |
|---|---|---|---|---|---|---|
5001
Century Aluminum
CENX
$4.43B
| $227K | ﹤0.01% |
13,759
-15,814
| -53% | -$231K |
|
5002
CALL
First Bancorp
FBP
$4.42B
| $227K | ﹤0.01% |
16,500
-43,100
| -72% | -$593K |
|
5003
Helios Technologies
HLIO
$2.57B
| $227K | ﹤0.01% |
+2,163
| New | +$210K |
|
|
JMIA
5004
Jumia Technologies
JMIA
$737M
| $227K | ﹤0.01% |
19,943
-78,303
| -80% | -$1.22M |
|
5005
Sprouts Farmers Market
SFM
$8.13B
| $227K | ﹤0.01% |
7,652
-43,282
| -85% | -$1.08M |
|
|
TPIC
5006
CALL
DELISTED
TPI Composites
TPIC
| $227K | ﹤0.01% |
15,200
+12,000
| +375% | +$294K |
|
5007
CALL
Thomson Reuters
TRI
$42.8B
| $227K | ﹤0.01% |
1,803
-4,366
| -71% | -$544K |
|
5008
PUT
Western Midstream Partners
WES
$19.2B
| $227K | ﹤0.01% |
10,200
-24,000
| -70% | -$513K |
|
|
WMC
5009
CALL
DELISTED
Western Asset Mortgage Capital Corporation
WMC
| $227K | ﹤0.01% |
10,760
+5,170
| +92% | +$123K |
|
5010
Ardelyx
ARDX
$1.22B
| $226K | ﹤0.01% |
205,664
+178,643
| +661% | +$212K |
|
5011
CALL
SunCoke Energy
SXC
$720M
| $226K | ﹤0.01% |
34,300
+18,000
| +110% | +$119K |
|
|
EVOP
5012
DELISTED
EVO Payments, Inc. Class A Common Stock
EVOP
| $226K | ﹤0.01% |
+8,867
| New | +$203K |
|
|
LOTZ
5013
PUT
DELISTED
CarLotz, Inc. Class A Common Stock
LOTZ
| $226K | ﹤0.01% |
99,700
-31,300
| -24% | -$103K |
|
|
FRTA
5014
DELISTED
Forterra, Inc
FRTA
| $226K | ﹤0.01% |
9,528
+1,794
| +23% | +$42.7K |
|
5015
CALL
Federated Hermes
FHI
$4.55B
| $225K | ﹤0.01% |
6,000
+5,300
| +757% | +$184K |
|
5016
CALL
PLAYSTUDIOS Inc
MYPS
$77.9M
| $225K | ﹤0.01% |
57,200
+300
| +0.5% | +$1.3K |
|
5017
PUT
NMI Holdings
NMIH
$3.33B
| $225K | ﹤0.01% |
10,300
-6,300
| -38% | -$140K |
|
5018
PUT
STAG Industrial
STAG
$7.38B
| $225K | ﹤0.01% |
4,700
-900
| -16% | -$39.2K |
|
|
DNMR
5019
DELISTED
Danimer Scientific, Inc.
DNMR
| $225K | ﹤0.01% |
663
-96
| -13% | -$52.9K |
|
5020
CALL
ASE Group
ASX
$77.3B
| $224K | ﹤0.01% |
+28,700
| New | +$211K |
|
5021
PUT
Celldex Therapeutics
CLDX
$2.99B
| $224K | ﹤0.01% |
5,800
+5,600
| +2,800% | +$244K |
|
5022
ICICI Bank
IBN
$108B
| $224K | ﹤0.01% |
11,362
-19,493
| -63% | -$385K |
|
|
KZR
5023
CALL
DELISTED
Kezar Life Sciences
KZR
| $224K | ﹤0.01% |
1,340
+840
| +168% | +$94.8K |
|
|
PEO
5024
PUT
Adams Natural Resources Fund
PEO
$739M
| $224K | ﹤0.01% |
+14,137
| New | +$227K |
|
|
KL
5025
CALL
DELISTED
Kirkland Lake Gold Ltd Ordinary
KL
| $224K | ﹤0.01% |
157,100
-18,800
| -11% | -$793K |
|
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.