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 | |
|---|---|---|---|---|---|---|
|
CRON
4601
Cronos Group
CRON
$1.06B
| $293K | ﹤0.01% |
74,892
-34,606
| -32% | -$173K |
|
4602
Lithia Motors
LAD
$8.47B
| $293K | ﹤0.01% |
988
-3,968
| -80% | -$1.23M |
|
4603
PUT
Ligand Pharmaceuticals
LGND
$5.76B
| $293K | ﹤0.01% |
3,046
+962
| +46% | +$88.9K |
|
4604
M&T Bank
MTB
$35.7B
| $293K | ﹤0.01% |
1,909
-388
| -17% | -$59.6K |
|
4605
Clearfield
CLFD
$411M
| $292K | ﹤0.01% |
+3,459
| New | +$217K |
|
4606
Precigen
PGEN
$2.24B
| $292K | ﹤0.01% |
78,944
+72,960
| +1,219% | +$314K |
|
4607
PTC
PTC
$15.8B
| $292K | ﹤0.01% |
2,414
+889
| +58% | +$107K |
|
4608
ProShares Ultra Financials
UYG
$828M
| $292K | ﹤0.01% |
4,323
-13,508
| -76% | -$933K |
|
|
SLCA
4609
DELISTED
U.S. SILICA HOLDINGS, INC.
SLCA
| $292K | ﹤0.01% |
31,066
-9,926
| -24% | -$98.9K |
|
|
WLL
4610
PUT
DELISTED
Whiting Petroleum Corporation
WLL
| $292K | ﹤0.01% |
46,500
-70,400
| -60% | -$4.62M |
|
4611
Alamos Gold
AGI
$11.6B
| $291K | ﹤0.01% |
+37,953
| New | +$293K |
|
4612
CALL
Amphastar Pharmaceuticals
AMPH
$879M
| $291K | ﹤0.01% |
+12,500
| New | +$256K |
|
4613
PUT
Blink Charging
BLNK
$74.3M
| $291K | ﹤0.01% |
11,000
-39,200
| -78% | -$1.26M |
|
4614
CALL
Ethan Allen Interiors
ETD
$570M
| $291K | ﹤0.01% |
+11,100
| New | +$271K |
|
4615
PUT
Radian Group
RDN
$5.18B
| $291K | ﹤0.01% |
13,800
+4,500
| +48% | +$99.7K |
|
4616
PUT
Red Rock Resorts
RRR
$3.77B
| $291K | ﹤0.01% |
5,300
-7,700
| -59% | -$400K |
|
4617
Akamai
AKAM
$16.7B
| $290K | ﹤0.01% |
+2,486
| New | +$273K |
|
4618
CALL
Inseego
INSG
$114M
| $290K | ﹤0.01% |
4,980
-3,180
| -39% | -$207K |
|
4619
PUT
NeoGenomics
NEO
$1.96B
| $290K | ﹤0.01% |
8,500
+1,600
| +23% | +$62.7K |
|
4620
CALL
NexGen Energy
NXE
$6.06B
| $290K | ﹤0.01% |
66,500
+10,800
| +19% | +$55.5K |
|
4621
PUT
Cars.com
CARS
$662M
| $289K | ﹤0.01% |
18,000
+15,000
| +500% | +$214K |
|
4622
CALL
Cognyte Software
CGNT
$659M
| $289K | ﹤0.01% |
18,500
+10,800
| +140% | +$218K |
|
4623
CALL
Fidus Investment
FDUS
$749M
| $289K | ﹤0.01% |
16,100
+3,100
| +24% | +$55K |
|
|
DFTX
4624
PUT
Definium Therapeutics
DFTX
$5.78B
| $289K | ﹤0.01% |
13,973
-15,247
| -52% | -$487K |
|
|
4625
NexGen Energy
NXE
$6.06B
| $289K | ﹤0.01% |
66,208
+4,133
| +7% | +$21.3K |
|
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.