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 | |
|---|---|---|---|---|---|---|
6076
CALL
Gentex
GNTX
$5.13B
| $111K | ﹤0.01% |
3,200
-13,400
| -81% | -$475K |
|
6077
PUT
Lincoln Electric
LECO
$15.2B
| $111K | ﹤0.01% |
800
+100
| +14% | +$13.9K |
|
6078
PUT
AEye
LIDR
$59.3M
| $111K | ﹤0.01% |
+770
| New | +$119K |
|
6079
PUT
LG Display
LPL
$3.25B
| $111K | ﹤0.01% |
11,000
+6,600
| +150% | +$56.9K |
|
6080
Magnachip Semiconductor
MX
$135M
| $111K | ﹤0.01% |
+5,303
| New | +$98K |
|
6081
PUT
NerdWallet
NRDS
$603M
| $111K | ﹤0.01% |
+7,200
| New | +$141K |
|
6082
PUT
Spectrum Brands
SPB
$2.12B
| $111K | ﹤0.01% |
1,100
-300
| -21% | -$29.5K |
|
6083
PUT
TriplePoint Venture Growth BDC
TPVG
$189M
| $111K | ﹤0.01% |
6,200
-11,900
| -66% | -$208K |
|
6084
Universal Technical Institute
UTI
$2.31B
| $111K | ﹤0.01% |
14,215
-10,550
| -43% | -$78.8K |
|
|
CELL
6085
DELISTED
PhenomeX Inc. Common Stock
CELL
| $111K | ﹤0.01% |
+6,140
| New | +$133K |
|
|
LOTZ
6086
DELISTED
CarLotz, Inc. Class A Common Stock
LOTZ
| $111K | ﹤0.01% |
48,998
-52,902
| -52% | -$173K |
|
|
ARBK
6087
PUT
Argo Blockchain
ARBK
$42.1M
| $110K | ﹤0.01% |
+42
| New | +$146K |
|
6088
Alphatec Holdings
ATEC
$1.45B
| $110K | ﹤0.01% |
+9,633
| New | +$114K |
|
|
AUTL
6089
CALL
Autolus Therapeutics
AUTL
$500M
| $110K | ﹤0.01% |
+21,300
| New | +$128K |
|
6090
Camtek
CAMT
$7.03B
| $110K | ﹤0.01% |
2,392
-6,141
| -72% | -$262K |
|
6091
Humacyte
HUMA
$197M
| $110K | ﹤0.01% |
+15,203
| New | +$150K |
|
6092
PUT
Hydrofarm Holdings
HYFM
$8.58M
| $110K | ﹤0.01% |
390
-7,860
| -95% | -$2.67M |
|
|
RJET
6093
CALL
Republic Airways Holdings
RJET
$1.03B
| $110K | ﹤0.01% |
1,313
-880
| -40% | -$95.9K |
|
6094
Meta Platforms (Facebook)
META
$1.49T
| $110K | ﹤0.01% |
330
-300
| -48% | -$99.6K |
|
|
ODP
6095
CALL
DELISTED
ODP
ODP
| $110K | ﹤0.01% |
3,100
+1,000
| +48% | +$41.1K |
|
6096
CALL
TTM Technologies
TTMI
$13.9B
| $110K | ﹤0.01% |
7,400
+6,200
| +517% | +$86.4K |
|
6097
CALL
Vivani Medical
VANI
$119M
| $110K | ﹤0.01% |
22,567
+20,634
| +1,067% | +$151K |
|
|
VIVO
6098
VivoPower PLC
VIVO
$118M
| $110K | ﹤0.01% |
3,635
+3,176
| +692% | +$145K |
|
|
ZH
6099
CALL
Zhihu
ZH
$281M
| $110K | ﹤0.01% |
3,333
+766
| +30% | +$36.5K |
|
|
CMBT
6100
CALL
CMB.TECH NV
CMBT
$4.65B
| $110K | ﹤0.01% |
12,400
-22,600
| -65% | -$221K |
|
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.