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 | |
|---|---|---|---|---|---|---|
|
CVGW
3601
CALL
DELISTED
Calavo Growers
CVGW
| $580K | ﹤0.01% |
13,700
+9,800
| +251% | +$401K |
|
|
UCTT
3602
PUT
Ultra Clean Holdings
UCTT
$3.47B
| $579K | ﹤0.01% |
10,100
+1,300
| +15% | +$67.6K |
|
3603
PUT
Jack in the Box
JACK
$308M
| $577K | ﹤0.01% |
6,600
-21,700
| -77% | -$2.02M |
|
3604
PUT
MPLX
MPLX
$60.1B
| $577K | ﹤0.01% |
19,500
-8,600
| -31% | -$258K |
|
3605
PUT
NOV
NOV
$7.11B
| $577K | ﹤0.01% |
42,600
-17,300
| -29% | -$237K |
|
|
BBBY
3606
DELISTED
Bed Bath & Beyond Inc
BBBY
| $577K | ﹤0.01% |
39,600
-114,838
| -74% | -$2.01M |
|
3607
Crinetics Pharmaceuticals
CRNX
$8.88B
| $576K | ﹤0.01% |
+20,280
| New | +$500K |
|
|
ETWO
3608
PUT
DELISTED
E2open Parent Holdings
ETWO
| $576K | ﹤0.01% |
51,200
-25,900
| -34% | -$305K |
|
3609
CALL
LPL Financial
LPLA
$27.4B
| $576K | ﹤0.01% |
3,600
-1,600
| -31% | -$264K |
|
3610
PUT
Werner Enterprises
WERN
$2.3B
| $576K | ﹤0.01% |
12,100
+10,200
| +537% | +$467K |
|
3611
CALL
MarketAxess Holdings
MKTX
$4.34B
| $575K | ﹤0.01% |
1,400
-1,800
| -56% | -$710K |
|
|
JPGE
3612
PUT
DELISTED
JPMorgan Diversified Return Global Equity ETF
JPGE
| $575K | ﹤0.01% |
9,100
+6,100
| +203% | +$385K |
|
|
ABMD
3613
PUT
DELISTED
Abiomed Inc
ABMD
| $574K | ﹤0.01% |
1,600
-900
| -36% | -$304K |
|
3614
CALL
WisdomTree US Total Dividend Fund
DTD
$1.66B
| $573K | ﹤0.01% |
13,900
-27,700
| -67% | -$1.72M |
|
3615
CALL
Pembina Pipeline
PBA
$29B
| $573K | ﹤0.01% |
18,900
-39,400
| -68% | -$1.26M |
|
|
DNMR
3616
CALL
DELISTED
Danimer Scientific, Inc.
DNMR
| $573K | ﹤0.01% |
1,683
-70
| -4% | -$38.6K |
|
|
BLU
3617
CALL
DELISTED
BELLUS Health Inc.
BLU
| $573K | ﹤0.01% |
+71,200
| New | +$473K |
|
3618
CALL
Invesco CurrencyShares Swiss Franc Trust
FXF
$409M
| $572K | ﹤0.01% |
5,800
+3,200
| +123% | +$313K |
|
3619
Genesco
GCO
$432M
| $572K | ﹤0.01% |
8,924
+6,090
| +215% | +$387K |
|
|
JPGE
3620
CALL
DELISTED
JPMorgan Diversified Return Global Equity ETF
JPGE
| $572K | ﹤0.01% |
9,200
+7,400
| +411% | +$460K |
|
3621
PUT
B&G Foods
BGS
$297M
| $571K | ﹤0.01% |
18,600
-25,500
| -58% | -$780K |
|
3622
CALL
Buckle
BKE
$2.35B
| $571K | ﹤0.01% |
13,500
+11,100
| +463% | +$503K |
|
|
GOGL
3623
PUT
DELISTED
Golden Ocean Group
GOGL
| $571K | ﹤0.01% |
61,400
+28,300
| +85% | +$257K |
|
3624
Chewy
CHWY
$9.38B
| $570K | ﹤0.01% |
9,675
-73,427
| -88% | -$4.8M |
|
3625
PUT
American Well
AMWL
$185M
| $568K | ﹤0.01% |
4,710
-3,090
| -40% | -$471K |
|
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.