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 | |
|---|---|---|---|---|---|---|
|
VMEO
4076
CALL
DELISTED
Vimeo
VMEO
| $413K | ﹤0.01% |
23,000
+14,600
| +174% | +$356K |
|
|
CCV
4077
CALL
DELISTED
Churchill Capital Corp V
CCV
| $413K | ﹤0.01% |
42,000
-21,200
| -34% | -$209K |
|
4078
PUT
BeyondSpring
BYSI
$48.1M
| $412K | ﹤0.01% |
+91,000
| New | +$1.03M |
|
4079
W.W. Grainger
GWW
$64.5B
| $412K | ﹤0.01% |
796
+205
| +35% | +$96.7K |
|
|
ETRN
4080
PUT
DELISTED
Equitrans Midstream Corporation Common Stock
ETRN
| $412K | ﹤0.01% |
39,900
-38,000
| -49% | -$394K |
|
4081
PUT
Mirion Technologies
MIR
$3.65B
| $411K | ﹤0.01% |
39,300
-443,200
| -92% | -$4.76M |
|
4082
CALL
Prospect Capital
PSEC
$1.11B
| $411K | ﹤0.01% |
48,900
-23,700
| -33% | -$199K |
|
|
CRON
4083
PUT
Cronos Group
CRON
$1.06B
| $410K | ﹤0.01% |
104,800
-106,900
| -50% | -$534K |
|
4084
Madrigal Pharmaceuticals
MDGL
$12.4B
| $410K | ﹤0.01% |
4,850
-11,364
| -70% | -$934K |
|
|
RDUS
4085
PUT
DELISTED
Radius Recycling
RDUS
| $410K | ﹤0.01% |
7,900
-13,100
| -62% | -$672K |
|
|
JOAN
4086
CALL
DELISTED
JOANN, Inc. Common Stock
JOAN
| $410K | ﹤0.01% |
39,500
+4,700
| +14% | +$49.2K |
|
|
RRD
4087
CALL
DELISTED
RR Donnelley & Sons Co.
RRD
| $410K | ﹤0.01% |
36,500
+16,700
| +84% | +$145K |
|
4088
PUT
Aecom
ACM
$9.4B
| $409K | ﹤0.01% |
5,300
+4,800
| +960% | +$337K |
|
4089
CALL
Curis
CRIS
$9.67M
| $409K | ﹤0.01% |
215
-235
| -52% | -$559K |
|
4090
CALL
Hain Celestial
HAIN
$45.7M
| $409K | ﹤0.01% |
9,600
-1,200
| -11% | -$51.2K |
|
4091
PUT
Toro Company
TTC
$8.87B
| $409K | ﹤0.01% |
4,100
+2,100
| +105% | +$209K |
|
|
LICY
4092
DELISTED
Li-Cycle Holdings Corp.
LICY
| $409K | ﹤0.01% |
+5,143
| New | +$486K |
|
|
ATCO
4093
PUT
DELISTED
Atlas Corp.
ATCO
| $409K | ﹤0.01% |
28,900
-1,300
| -4% | -$18.4K |
|
|
PRPB
4094
DELISTED
CC Neuberger Principal Holdings II Class A Ordinary Shares
PRPB
| $409K | ﹤0.01% |
+41,403
| New | +$409K |
|
4095
CALL
Coca-Cola Europacific Partners
CCEP
$48.9B
| $408K | ﹤0.01% |
7,300
-400
| -5% | -$21.6K |
|
4096
PUT
Magnachip Semiconductor
MX
$111M
| $408K | ﹤0.01% |
19,500
+13,300
| +215% | +$246K |
|
4097
Companhia Siderúrgica Nacional
SID
$1.38B
| $408K | ﹤0.01% |
+92,081
| New | +$400K |
|
4098
Tilray
TLRY
$481M
| $408K | ﹤0.01% |
5,813
-74,780
| -93% | -$7.53M |
|
|
ABB
4099
PUT
DELISTED
ABB Ltd
ABB
| $408K | ﹤0.01% |
10,700
+1,100
| +11% | +$38.6K |
|
4100
PUT
Citi Trends
CTRN
$543M
| $407K | ﹤0.01% |
4,300
+4,000
| +1,333% | +$319K |
|
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.