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 | |
|---|---|---|---|---|---|---|
3926
CALL
Signet Jewelers
SIG
$3.81B
| $461K | ﹤0.01% |
5,300
+2,800
| +112% | +$257K |
|
|
AGCB
3927
CALL
DELISTED
Altimeter Growth Corp 2
AGCB
| $461K | ﹤0.01% |
46,800
+11,500
| +33% | +$115K |
|
|
DOC
3928
CALL
DELISTED
PHYSICIANS REALTY TRUST
DOC
| $461K | ﹤0.01% |
24,500
-1,900
| -7% | -$35K |
|
3929
PUT
ACM Research
ACMR
$4.98B
| $460K | ﹤0.01% |
16,200
+6,000
| +59% | +$190K |
|
3930
PUT
Microvast
MVST
$256M
| $460K | ﹤0.01% |
+81,300
| New | +$642K |
|
|
UNIT
3931
PUT
Uniti Group
UNIT
$2.53B
| $460K | ﹤0.01% |
32,900
-4,500
| -12% | -$59.9K |
|
3932
CleanSpark
CLSK
$3.46B
| $459K | ﹤0.01% |
48,245
+41,119
| +577% | +$657K |
|
|
3933
PUT
CleanSpark
CLSK
$3.46B
| $458K | ﹤0.01% |
48,200
-2,900
| -6% | -$46.3K |
|
3934
CALL
FNB Corp
FNB
$6.81B
| $457K | ﹤0.01% |
37,700
+21,100
| +127% | +$255K |
|
3935
LPL Financial
LPLA
$27.4B
| $457K | ﹤0.01% |
+2,860
| New | +$472K |
|
3936
CALL
Tenet Healthcare
THC
$22.6B
| $457K | ﹤0.01% |
5,600
-12,500
| -69% | -$914K |
|
3937
CALL
VICI Properties
VICI
$29.8B
| $457K | ﹤0.01% |
15,200
-18,800
| -55% | -$545K |
|
|
EVBG
3938
PUT
DELISTED
Everbridge, Inc. Common Stock
EVBG
| $457K | ﹤0.01% |
6,800
+2,100
| +45% | +$254K |
|
3939
CALL
Keros Therapeutics
KROS
$199M
| $456K | ﹤0.01% |
+7,800
| New | +$389K |
|
|
HLTH
3940
DELISTED
Cue Health Inc. Common Stock
HLTH
| $456K | ﹤0.01% |
+34,046
| New | +$375K |
|
|
SDC
3941
PUT
DELISTED
SmileDirectClub, Inc. Class A Common Stock
SDC
| $456K | ﹤0.01% |
194,100
+11,600
| +6% | +$48.5K |
|
3942
ProShares Trust UltraShort Lehman 7-10 Year Treasury
PST
$10.5M
| $455K | ﹤0.01% |
28,332
+6,342
| +29% | +$103K |
|
|
RADA
3943
PUT
DELISTED
Rada Electronic Industries Ltd
RADA
| $455K | ﹤0.01% |
48,400
-163,600
| -77% | -$1.64M |
|
3944
CALL
Canadian National Railway
CNI
$78.3B
| $454K | ﹤0.01% |
3,700
-4,700
| -56% | -$595K |
|
3945
Darden Restaurants
DRI
$23.7B
| $454K | ﹤0.01% |
+3,019
| New | +$446K |
|
3946
CALL
DTE Energy
DTE
$30.4B
| $454K | ﹤0.01% |
3,800
-6,100
| -62% | -$698K |
|
|
3947
Signet Jewelers
SIG
$3.81B
| $454K | ﹤0.01% |
5,224
+4,428
| +556% | +$407K |
|
3948
CALL
Green Dot
GDOT
$758M
| $453K | ﹤0.01% |
12,500
-22,000
| -64% | -$899K |
|
3949
PUT
Stride
LRN
$4.08B
| $453K | ﹤0.01% |
13,600
-5,300
| -28% | -$183K |
|
3950
Vanguard Total World Stock ETF
VT
$76.3B
| $453K | ﹤0.01% |
+4,219
| New | +$448K |
|
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.