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 | |
|---|---|---|---|---|---|---|
5451
CALL
MacroGenics
MGNX
$235M
| $166K | ﹤0.01% |
10,400
+3,600
| +53% | +$67.8K |
|
5452
Nordic American Tanker
NAT
$1.38B
| $166K | ﹤0.01% |
98,541
+37,925
| +63% | +$81.5K |
|
5453
Vanguard Morningstar Mid-Cap ETF
VO
$106B
| $166K | ﹤0.01% |
+2,616
| New | +$164K |
|
|
NEUE
5454
DELISTED
NeueHealth
NEUE
| $166K | ﹤0.01% |
+605
| New | +$279K |
|
|
ENV
5455
CALL
DELISTED
ENVESTNET, INC.
ENV
| $166K | ﹤0.01% |
2,100
+700
| +50% | +$57K |
|
5456
Globalstar
GSAT
$10.7B
| $165K | ﹤0.01% |
9,485
+6,846
| +259% | +$150K |
|
5457
PUT
IDEX
IEX
$17B
| $165K | ﹤0.01% |
700
+500
| +250% | +$114K |
|
|
OPLN
5458
CALL
Openlane
OPLN
$4.21B
| $165K | ﹤0.01% |
10,600
-37,100
| -78% | -$568K |
|
5459
CALL
Patterson-UTI
PTEN
$3.98B
| $165K | ﹤0.01% |
19,600
-13,500
| -41% | -$116K |
|
|
FLG
5460
Flagstar Bank National Association
FLG
$5.93B
| $165K | ﹤0.01% |
4,512
-11,710
| -72% | -$446K |
|
|
VZIO
5461
PUT
DELISTED
VIZIO Holding Corp.
VZIO
| $165K | ﹤0.01% |
8,500
-32,400
| -79% | -$639K |
|
5462
Alector
ALEC
$168M
| $164K | ﹤0.01% |
7,943
-5,578
| -41% | -$126K |
|
5463
CALL
InterDigital
IDCC
$7.87B
| $164K | ﹤0.01% |
2,300
-7,500
| -77% | -$523K |
|
5464
Medpace
MEDP
$16.1B
| $164K | ﹤0.01% |
758
-201
| -21% | -$42.1K |
|
5465
RLJ Lodging Trust
RLJ
$1.86B
| $164K | ﹤0.01% |
11,823
+10,762
| +1,014% | +$151K |
|
5466
Sphere Entertainment
SPHR
$5.14B
| $164K | ﹤0.01% |
2,345
-5,676
| -71% | -$398K |
|
5467
PUT
Universal Corp
UVV
$1.31B
| $164K | ﹤0.01% |
3,000
-3,000
| -50% | -$150K |
|
|
WMC
5468
PUT
DELISTED
Western Asset Mortgage Capital Corporation
WMC
| $164K | ﹤0.01% |
7,810
-9,250
| -54% | -$219K |
|
|
BTNB
5469
PUT
DELISTED
Bridgetown 2 Holdings Limited Class A Ordinary Shares
BTNB
| $164K | ﹤0.01% |
16,600
-62,200
| -79% | -$619K |
|
5470
CALL
A.O. Smith
AOS
$8.17B
| $163K | ﹤0.01% |
1,900
-10,800
| -85% | -$823K |
|
5471
PUT
Bally's
BALY
$682M
| $163K | ﹤0.01% |
4,300
-1,300
| -23% | -$56.8K |
|
5472
CALL
Kanzhun
BZ
$7.27B
| $163K | ﹤0.01% |
+4,700
| New | +$165K |
|
5473
PUT
Cullen/Frost Bankers
CFR
$10.3B
| $163K | ﹤0.01% |
1,300
-3,500
| -73% | -$450K |
|
|
DENN
5474
PUT
DELISTED
Denny's
DENN
| $163K | ﹤0.01% |
10,200
-3,100
| -23% | -$47.5K |
|
|
EH
5475
EHang Holdings
EH
$389M
| $163K | ﹤0.01% |
+10,965
| New | +$230K |
|
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.