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 | |
|---|---|---|---|---|---|---|
2801
PUT
Kamada
KMDA
$402M
| $1.04M | ﹤0.01% |
158,400
+138,300
| +688% | +$824K |
|
|
NBIS
2802
Nebius Group N.V.
NBIS
$47.7B
| $1.04M | ﹤0.01% |
+17,223
| New | +$1.27M |
|
2803
PUT
BCE
BCE
$20B
| $1.04M | ﹤0.01% |
20,000
+7,000
| +54% | +$358K |
|
|
FINV
2804
CALL
FinVolution Group
FINV
$1.13B
| $1.04M | ﹤0.01% |
211,000
+50,300
| +31% | +$293K |
|
|
TEN
2805
CALL
DELISTED
Tenneco Inc. Class A Voting Common Stock
TEN
| $1.04M | ﹤0.01% |
92,000
-43,700
| -32% | -$546K |
|
|
ADVM
2806
CALL
DELISTED
Adverum Biotechnologies
ADVM
| $1.04M | ﹤0.01% |
58,930
+53,390
| +964% | +$1.07M |
|
2807
PUT
Alcon
ALC
$33.2B
| $1.04M | ﹤0.01% |
11,900
-42,100
| -78% | -$3.47M |
|
2808
CALL
Beazer Homes USA
BZH
$915M
| $1.03M | ﹤0.01% |
44,600
+29,900
| +203% | +$601K |
|
2809
CALL
ESS Tech
GWH
$22.6M
| $1.03M | ﹤0.01% |
+6,020
| New | +$1.33M |
|
2810
PUT
Western Alliance Bancorporation
WAL
$9.25B
| $1.03M | ﹤0.01% |
9,600
+3,600
| +60% | +$405K |
|
|
WOW
2811
PUT
DELISTED
WideOpenWest
WOW
| $1.03M | ﹤0.01% |
48,000
+29,800
| +164% | +$594K |
|
2812
PUT
Bloomin' Brands
BLMN
$705M
| $1.03M | ﹤0.01% |
49,000
-37,300
| -43% | -$787K |
|
2813
Louisiana-Pacific
LPX
$5.24B
| $1.03M | ﹤0.01% |
13,129
+9,468
| +259% | +$649K |
|
2814
CALL
Prothena Corp
PRTA
$466M
| $1.03M | ﹤0.01% |
20,800
+5,500
| +36% | +$305K |
|
|
VNET
2815
CALL
VNET Group
VNET
$2.07B
| $1.03M | ﹤0.01% |
113,800
+43,900
| +63% | +$597K |
|
2816
Kinsale Capital Group
KNSL
$8.16B
| $1.02M | ﹤0.01% |
+4,312
| New | +$849K |
|
2817
CALL
Kodiak Sciences
KOD
$2.64B
| $1.02M | ﹤0.01% |
12,100
+10,500
| +656% | +$1.07M |
|
2818
American Outdoor Brands
AOUT
$160M
| $1.02M | ﹤0.01% |
51,400
+40,580
| +375% | +$912K |
|
|
EFOR
2819
PUT
Everforth Inc
EFOR
$889M
| $1.02M | ﹤0.01% |
8,300
+5,100
| +159% | +$624K |
|
|
SJR
2820
DELISTED
Shaw Communications Inc.
SJR
| $1.02M | ﹤0.01% |
33,781
-1,273
| -4% | -$37.2K |
|
2821
PUT
Tandem Diabetes Care
TNDM
$1.17B
| $1.02M | ﹤0.01% |
6,800
-15,700
| -70% | -$2.12M |
|
2822
PUT
GoodRx Holdings
GDRX
$1.02B
| $1.02M | ﹤0.01% |
31,300
-129,500
| -81% | -$5.21M |
|
2823
PUT
IonQ
IONQ
$13.3B
| $1.02M | ﹤0.01% |
61,200
+7,800
| +15% | +$130K |
|
2824
Mid-America Apartment Communities
MAA
$15.7B
| $1.02M | ﹤0.01% |
+4,449
| New | +$920K |
|
2825
PUT
OneMain Financial
OMF
$7.06B
| $1.02M | ﹤0.01% |
20,400
-81,700
| -80% | -$4.32M |
|
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.