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 | |
|---|---|---|---|---|---|---|
5426
PUT
Takeda Pharmaceutical
TAK
$54.6B
| $169K | ﹤0.01% |
12,400
-26,000
| -68% | -$365K |
|
5427
CALL
Telephone and Data Systems
TDS
$3.82B
| $169K | ﹤0.01% |
8,400
+1,200
| +17% | +$23.4K |
|
|
VNET
5428
VNET Group
VNET
$2.04B
| $169K | ﹤0.01% |
18,803
+3,289
| +21% | +$44.7K |
|
5429
Brookfield Infrastructure Partners
BIP
$19.2B
| $168K | ﹤0.01% |
+4,169
| New | +$161K |
|
5430
PUT
Cheniere Energy
CQP
$31.9B
| $168K | ﹤0.01% |
4,000
-3,800
| -49% | -$160K |
|
5431
CALL
HealthEquity
HQY
$8.41B
| $168K | ﹤0.01% |
3,800
+1,900
| +100% | +$111K |
|
5432
PUT
HUB Group
HUBG
$2.85B
| $168K | ﹤0.01% |
+4,000
| New | +$159K |
|
5433
InterDigital
IDCC
$7.87B
| $168K | ﹤0.01% |
2,348
-319
| -12% | -$22.2K |
|
5434
CALL
Kennametal
KMT
$2.59B
| $168K | ﹤0.01% |
4,700
-14,300
| -75% | -$532K |
|
5435
PUT
Middlesex Water
MSEX
$1.08B
| $168K | ﹤0.01% |
1,400
-300
| -18% | -$31.9K |
|
5436
ProShares Short S&P500
SH
$927M
| $168K | ﹤0.01% |
3,088
-2,280
| -42% | -$129K |
|
|
MAGN
5437
PUT
Magnera Corp
MAGN
$472M
| $168K | ﹤0.01% |
754
+662
| +720% | +$144K |
|
|
BWAC
5438
CALL
DELISTED
BETTER WORLD ACQUISITION CORP. Common Stock
BWAC
| $168K | ﹤0.01% |
16,600
-100,800
| -86% | -$1.02M |
|
5439
BioAtla
BCAB
$5.46M
| $167K | ﹤0.01% |
+171
| New | +$219K |
|
5440
PUT
Global Industrial
GIC
$1.37B
| $167K | ﹤0.01% |
4,100
+1,500
| +58% | +$61.5K |
|
5441
CALL
Globus Maritime Ltd
GLBS
$61.9M
| $167K | ﹤0.01% |
79,800
-32,700
| -29% | -$87.2K |
|
5442
CALL
Maximus
MMS
$3.17B
| $167K | ﹤0.01% |
2,100
+1,800
| +600% | +$147K |
|
5443
CALL
Sun Communities
SUI
$15.2B
| $167K | ﹤0.01% |
800
+600
| +300% | +$118K |
|
|
CDR
5444
DELISTED
Cedar Realty Trust, Inc
CDR
| $167K | ﹤0.01% |
+6,653
| New | +$150K |
|
|
TPTX
5445
DELISTED
Turning Point Therapeutics, Inc. Common Stock
TPTX
| $167K | ﹤0.01% |
3,516
+3,500
| +21,875% | +$156K |
|
|
PBCT
5446
PUT
DELISTED
People's United Financial Inc
PBCT
| $167K | ﹤0.01% |
9,400
+7,200
| +327% | +$128K |
|
5447
AdaptHealth
AHCO
$1.47B
| $166K | ﹤0.01% |
6,795
+5,076
| +295% | +$119K |
|
5448
CALL
Euronet Worldwide
EEFT
$2.72B
| $166K | ﹤0.01% |
1,400
+1,200
| +600% | +$143K |
|
5449
Green Plains
GPRE
$1.18B
| $166K | ﹤0.01% |
+4,784
| New | +$178K |
|
5450
PUT
Lexicon Pharmaceuticals
LXRX
$1.03B
| $166K | ﹤0.01% |
42,200
+34,500
| +448% | +$168K |
|
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.