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 | |
|---|---|---|---|---|---|---|
4326
HF Sinclair
DINO
$16.4B
| $351K | ﹤0.01% |
10,730
-17,395
| -62% | -$586K |
|
4327
PUT
Kennametal
KMT
$2.59B
| $351K | ﹤0.01% |
9,800
-6,600
| -40% | -$245K |
|
4328
CALL
Quanterix
QTRX
$164M
| $351K | ﹤0.01% |
8,300
+8,200
| +8,200% | +$383K |
|
4329
CALL
Axcelis
ACLS
$4.01B
| $350K | ﹤0.01% |
4,700
+1,400
| +42% | +$82.9K |
|
4330
PUT
Banco Santander Chile
BSAC
$16.3B
| $350K | ﹤0.01% |
21,500
+21,300
| +10,650% | +$382K |
|
4331
CALL
Tecnoglass
TGLS
$1.95B
| $350K | ﹤0.01% |
+13,400
| New | +$376K |
|
4332
PUT
Bain Capital Specialty
BCSF
$802M
| $348K | ﹤0.01% |
22,900
+22,800
| +22,800% | +$351K |
|
4333
PUT
AdaptHealth
AHCO
$1.45B
| $347K | ﹤0.01% |
14,200
+10,600
| +294% | +$249K |
|
|
DX
4334
CALL
Dynex Capital
DX
$3.14B
| $347K | ﹤0.01% |
20,800
+5,800
| +39% | +$101K |
|
|
FBRT
4335
Franklin BSP Realty Trust
FBRT
$623M
| $347K | ﹤0.01% |
+23,259
| New | +$376K |
|
4336
PUT
Progyny
PGNY
$2.44B
| $347K | ﹤0.01% |
6,900
-4,400
| -39% | -$246K |
|
4337
PUT
Textron
TXT
$14.8B
| $347K | ﹤0.01% |
4,500
-2,600
| -37% | -$193K |
|
|
AGEN
4338
CALL
Agenus
AGEN
$309M
| $346K | ﹤0.01% |
5,477
-5,814
| -51% | -$458K |
|
4339
AdvanSix
ASIX
$538M
| $346K | ﹤0.01% |
+7,337
| New | +$338K |
|
4340
WisdomTree Japan Hedged Equity Fund
DXJ
$7.07B
| $346K | ﹤0.01% |
5,539
+1,220
| +28% | +$76.6K |
|
4341
EVgo
EVGO
$220M
| $346K | ﹤0.01% |
+34,828
| New | +$381K |
|
4342
CALL
Globus Medical
GMED
$10.7B
| $346K | ﹤0.01% |
4,800
-6,900
| -59% | -$501K |
|
4343
Lennox International
LII
$14.6B
| $346K | ﹤0.01% |
+1,067
| New | +$333K |
|
|
BWIN
4344
CALL
Baldwin Insurance Group
BWIN
$2.73B
| $346K | ﹤0.01% |
9,600
+9,500
| +9,500% | +$351K |
|
|
ALPP
4345
CALL
DELISTED
Alpine 4 Holdings Inc
ALPP
| $346K | ﹤0.01% |
+22,538
| New | +$501K |
|
|
LOTZ
4346
CALL
DELISTED
CarLotz, Inc. Class A Common Stock
LOTZ
| $346K | ﹤0.01% |
152,800
-145,400
| -49% | -$476K |
|
4347
PUT
Globant
GLOB
$1.58B
| $345K | ﹤0.01% |
1,100
-1,200
| -52% | -$355K |
|
4348
CALL
Lesaka Technologies
LSAK
$404M
| $345K | ﹤0.01% |
64,900
+56,200
| +646% | +$289K |
|
4349
PUT
Monolithic Power Systems
MPWR
$70.2B
| $345K | ﹤0.01% |
700
-2,700
| -79% | -$1.39M |
|
4350
PUT
Virtu Financial
VIRT
$5.14B
| $345K | ﹤0.01% |
12,000
-51,100
| -81% | -$1.39M |
|
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.