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 | |
|---|---|---|---|---|---|---|
8676
Kaixin Holdings
KXIN
$8.93M
| – | – |
0
| – | – |
|
8677
LiveOne
LVO
$65.1M
| $15K | ﹤0.01% |
1,184
+1,158
| +4,454% | +$25.4K |
|
|
8678
PUT
LiveOne
LVO
$65.1M
| $15K | ﹤0.01% |
1,200
-3,120
| -72% | -$68.4K |
|
8679
Medifast
MED
$108M
| $15K | ﹤0.01% |
73
-1,365
| -95% | -$282K |
|
8680
MarketAxess Holdings
MKTX
$4.34B
| $15K | ﹤0.01% |
37
-2,792
| -99% | -$1.1M |
|
8681
Motorcar Parts of America
MPAA
$267M
| $15K | ﹤0.01% |
+898
| New | +$16.9K |
|
|
NGD
8682
DELISTED
New Gold Inc
NGD
| $15K | ﹤0.01% |
10,389
-12,977
| -56% | -$18.7K |
|
8683
Oceaneering
OII
$4.78B
| $15K | ﹤0.01% |
1,369
-19,733
| -94% | -$256K |
|
8684
CALL
Olema Pharmaceuticals
OLMA
$1.01B
| $15K | ﹤0.01% |
+1,700
| New | +$35.2K |
|
|
OPI
8685
DELISTED
Office Properties Income Trust
OPI
| $15K | ﹤0.01% |
+608
| New | +$15.6K |
|
8686
PUT
Portland General Electric
POR
$5.92B
| $15K | ﹤0.01% |
300
+100
| +50% | +$4.99K |
|
8687
CALL
Primerica
PRI
$10B
| $15K | ﹤0.01% |
+100
| New | +$15.9K |
|
8688
Personalis
PSNL
$1.27B
| $15K | ﹤0.01% |
+1,108
| New | +$18.5K |
|
8689
PUT
Quest Resource Holding
QRHC
$28.3M
| $15K | ﹤0.01% |
2,200
+1,900
| +633% | +$11.4K |
|
8690
CALL
RE/MAX Holdings
RMAX
$206M
| $15K | ﹤0.01% |
+500
| New | +$15.3K |
|
8691
Recursion Pharmaceuticals
RXRX
$1.62B
| $15K | ﹤0.01% |
882
-6,084
| -87% | -$114K |
|
8692
CALL
Singularity Future Technology
SGLY
$4M
| $15K | ﹤0.01% |
79
-262
| -77% | -$123K |
|
8693
CALL
abrdn Physical Gold Shares ETF
SGOL
$6.87B
| $15K | ﹤0.01% |
900
-900
| -50% | -$15.5K |
|
8694
SiriusXM
SIRI
$10.7B
| $15K | ﹤0.01% |
239
-8,099
| -97% | -$507K |
|
8695
CALL
Turning Point Brands
TPB
$1.56B
| $15K | ﹤0.01% |
400
-3,500
| -90% | -$142K |
|
|
TRIB
8696
CALL
Trinity Biotech
TRIB
$8.4M
| $15K | ﹤0.01% |
71
-20
| -22% | -$5.67K |
|
8697
Mammoth Energy Services
TUSK
$125M
| $15K | ﹤0.01% |
8,347
+2,656
| +47% | +$6.93K |
|
|
8698
PUT
Mammoth Energy Services
TUSK
$125M
| $15K | ﹤0.01% |
8,400
-3,900
| -32% | -$10.2K |
|
8699
Upwork
UPWK
$1.21B
| $15K | ﹤0.01% |
+453
| New | +$20K |
|
8700
PUT
WPP
WPP
$4.59B
| $15K | ﹤0.01% |
200
-1,600
| -89% | -$114K |
|
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.