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 | |
|---|---|---|---|---|---|---|
2501
CALL
ProShares UltraShort Industrials
SIJ
$5.74M
| $1.31M | ﹤0.01% |
10,475
+3,525
| +51% | +$196K |
|
|
BLU
2502
PUT
DELISTED
BELLUS Health Inc.
BLU
| $1.31M | ﹤0.01% |
+163,200
| New | +$1.08M |
|
2503
CALL
Funko
FNKO
$323M
| $1.31M | ﹤0.01% |
69,700
-35,000
| -33% | -$621K |
|
|
OLPX
2504
CALL
DELISTED
Olaplex Holdings
OLPX
| $1.31M | ﹤0.01% |
+45,000
| New | +$1.19M |
|
|
CUK
2505
PUT
DELISTED
Carnival PLC
CUK
| $1.31M | ﹤0.01% |
70,800
+70,100
| +10,014% | +$1.38M |
|
|
POSH
2506
CALL
DELISTED
Poshmark, Inc. Class A Common Stock
POSH
| $1.31M | ﹤0.01% |
76,900
+61,600
| +403% | +$1.3M |
|
|
VCRA
2507
CALL
DELISTED
VOCERA COMMUNICATIONS, INC.
VCRA
| $1.31M | ﹤0.01% |
20,200
-4,000
| -17% | -$225K |
|
2508
CALL
Sprouts Farmers Market
SFM
$7.04B
| $1.31M | ﹤0.01% |
44,100
+8,900
| +25% | +$223K |
|
|
PVG
2509
CALL
DELISTED
PRETIUM RESOURCES INC.
PVG
| $1.31M | ﹤0.01% |
92,900
-27,900
| -23% | -$355K |
|
|
VSTO
2510
CALL
DELISTED
Vista Outdoor Inc.
VSTO
| $1.31M | ﹤0.01% |
28,400
-14,100
| -33% | -$603K |
|
2511
PUT
Microvision
MVIS
$88.2M
| $1.3M | ﹤0.01% |
260,400
-509,400
| -66% | -$4.05M |
|
2512
PUT
Genco Shipping & Trading
GNK
$1.17B
| $1.3M | ﹤0.01% |
81,300
+69,600
| +595% | +$1.13M |
|
|
RC
2513
PUT
Ready Capital
RC
$265M
| $1.3M | ﹤0.01% |
83,200
+52,840
| +174% | +$823K |
|
2514
Bloomin' Brands
BLMN
$680M
| $1.3M | ﹤0.01% |
61,947
+46,362
| +297% | +$979K |
|
2515
CALL
Kratos Defense & Security Solutions
KTOS
$8.88B
| $1.3M | ﹤0.01% |
66,900
+5,200
| +8% | +$110K |
|
|
ME
2516
CALL
DELISTED
23andMe Holding Co
ME
| $1.3M | ﹤0.01% |
9,735
-8,695
| -47% | -$1.61M |
|
2517
CALL
Transocean
RIG
$5.92B
| $1.29M | ﹤0.01% |
469,500
-351,300
| -43% | -$1.19M |
|
2518
CALL
National Grid
NGG
$82.7B
| $1.29M | ﹤0.01% |
19,899
-9,727
| -33% | -$571K |
|
|
RUTH
2519
CALL
DELISTED
Ruth's Hospitality Group, Inc.
RUTH
| $1.29M | ﹤0.01% |
65,000
-200
| -0.3% | -$3.83K |
|
|
SAFE
2520
PUT
DELISTED
Safehold Inc.
SAFE
| $1.29M | ﹤0.01% |
+16,200
| New | +$1.2M |
|
2521
Motorola Solutions
MSI
$69.4B
| $1.29M | ﹤0.01% |
4,755
+4,184
| +733% | +$1.05M |
|
2522
CALL
Virtu Financial
VIRT
$5.2B
| $1.29M | ﹤0.01% |
44,800
-55,800
| -55% | -$1.52M |
|
2523
CALL
Aramark
ARMK
$15B
| $1.29M | ﹤0.01% |
48,475
-48,337
| -50% | -$1.26M |
|
|
LEV
2524
CALL
DELISTED
The Lion Electric Company
LEV
| $1.29M | ﹤0.01% |
129,700
-85,400
| -40% | -$962K |
|
|
NVO
2525
PUT
Novo Nordisk
NVO
$216B
| $1.29M | ﹤0.01% |
23,000
+8,200
| +55% | +$444K |
|
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.