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 | |
|---|---|---|---|---|---|---|
2701
CALL
Public Service Enterprise Group
PEG
$39.8B
| $1.13M | ﹤0.01% |
17,000
-19,800
| -54% | -$1.25M |
|
2702
PUT
AutoNation
AN
$6.97B
| $1.13M | ﹤0.01% |
9,700
-85,800
| -90% | -$10.3M |
|
2703
Playboy Inc
PLBY
$141M
| $1.13M | ﹤0.01% |
42,550
-9,399
| -18% | -$284K |
|
2704
PUT
UDR
UDR
$12.9B
| $1.13M | ﹤0.01% |
18,900
-7,400
| -28% | -$416K |
|
|
CHS
2705
CALL
DELISTED
Chicos FAS, Inc.
CHS
| $1.13M | ﹤0.01% |
210,600
+90,800
| +76% | +$494K |
|
|
FITB
2706
CALL
Fifth Third Bancorp
FITB
$52B
| $1.13M | ﹤0.01% |
26,000
-24,500
| -49% | -$1.07M |
|
2707
PUT
Kulicke & Soffa
KLIC
$5.3B
| $1.13M | ﹤0.01% |
18,700
+11,500
| +160% | +$658K |
|
2708
PUT
Xenon Pharmaceuticals
XENE
$6.32B
| $1.13M | ﹤0.01% |
36,200
+30,600
| +546% | +$914K |
|
2709
Direxion Daily Junior Gold Miners Index Bull 2X ETF
JNUG
$351M
| $1.13M | ﹤0.01% |
17,619
+10,695
| +154% | +$705K |
|
2710
PUT
Varonis Systems
VRNS
$5.25B
| $1.13M | ﹤0.01% |
23,100
-6,500
| -22% | -$370K |
|
2711
Direxion Daily FTSE China Bull 3X ETF
YINN
$667M
| $1.13M | ﹤0.01% |
6,754
+428
| +7% | +$88.6K |
|
2712
CALL
CoreCivic
CXW
$3.1B
| $1.12M | ﹤0.01% |
112,800
-12,400
| -10% | -$123K |
|
|
FLG
2713
CALL
Flagstar Bank National Association
FLG
$5.77B
| $1.12M | ﹤0.01% |
30,633
+6,433
| +27% | +$245K |
|
2714
PUT
RLX Technology
RLX
$2.48B
| $1.12M | ﹤0.01% |
286,900
-27,700
| -9% | -$128K |
|
2715
CALL
OppFi
OPFI
$770M
| $1.12M | ﹤0.01% |
+246,100
| New | +$1.48M |
|
2716
CALL
Televisa
TV
$1.45B
| $1.12M | ﹤0.01% |
119,300
+65,800
| +123% | +$675K |
|
2717
CALL
Corteva
CTVA
$59.7B
| $1.11M | ﹤0.01% |
23,600
-44,200
| -65% | -$2.01M |
|
2718
PUT
Barclays
BCS
$94.1B
| $1.11M | ﹤0.01% |
107,700
+21,800
| +25% | +$229K |
|
2719
iShares Gold Trust
IAU
$63B
| $1.11M | ﹤0.01% |
32,027
+4,808
| +18% | +$164K |
|
|
ACB
2720
PUT
Aurora Cannabis
ACB
$165M
| $1.11M | ﹤0.01% |
22,900
+16,407
| +253% | +$1.1M |
|
2721
iRhythm Holdings
IRTC
$3.59B
| $1.11M | ﹤0.01% |
9,446
-12,864
| -58% | -$1.18M |
|
2722
CALL
Markel Group
MKL
$25B
| $1.11M | ﹤0.01% |
900
-900
| -50% | -$1.14M |
|
2723
CALL
Bionano Genomics
BNGO
$12.7M
| $1.11M | ﹤0.01% |
618
-326
| -35% | -$872K |
|
|
DVAX
2724
DELISTED
Dynavax Technologies
DVAX
| $1.11M | ﹤0.01% |
78,775
-7,082
| -8% | -$117K |
|
|
ETWO
2725
DELISTED
E2open Parent Holdings
ETWO
| $1.11M | ﹤0.01% |
98,333
+65,879
| +203% | +$775K |
|
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.