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 | |
|---|---|---|---|---|---|---|
5026
CALL
loanDepot
LDI
$532M
| $223K | ﹤0.01% |
+46,500
| New | +$272K |
|
|
ORC
5027
CALL
Orchid Island Capital
ORC
$1.3B
| $223K | ﹤0.01% |
9,940
+5,340
| +116% | +$128K |
|
5028
CALL
TC Energy
TRP
$70.2B
| $223K | ﹤0.01% |
4,800
-6,960
| -59% | -$344K |
|
|
CND
5029
PUT
DELISTED
Concord Acquisition Corp.
CND
| $223K | ﹤0.01% |
+21,500
| New | +$235K |
|
|
PIPP
5030
PUT
DELISTED
Pine Island Acquisition Corp.
PIPP
| $223K | ﹤0.01% |
22,700
-37,000
| -62% | -$368K |
|
|
ACC
5031
DELISTED
American Campus Communities, Inc.
ACC
| $223K | ﹤0.01% |
+3,894
| New | +$208K |
|
5032
Citigroup
C
$222B
| $222K | ﹤0.01% |
3,690
-218,237
| -98% | -$14.5M |
|
5033
CALL
Century Casinos
CNTY
$34M
| $222K | ﹤0.01% |
18,300
+15,300
| +510% | +$215K |
|
5034
Huntsman Corp
HUN
$1.71B
| $222K | ﹤0.01% |
+6,369
| New | +$208K |
|
5035
Molson Coors Class B
TAP
$7.79B
| $222K | ﹤0.01% |
4,800
| – | – |
|
5036
U-Haul Holding Co
UHAL
$13.9B
| $222K | ﹤0.01% |
3,070
-13,870
| -82% | -$999K |
|
5037
CALL
W.R. Berkley
WRB
$26.9B
| $222K | ﹤0.01% |
6,075
+4,725
| +350% | +$168K |
|
|
MRNS
5038
CALL
DELISTED
Marinus Pharmaceuticals, Inc
MRNS
| $222K | ﹤0.01% |
18,700
+700
| +4% | +$8.08K |
|
5039
PUT
Arvinas
ARVN
$518M
| $221K | ﹤0.01% |
2,700
-10,000
| -79% | -$814K |
|
5040
PUT
Popular Inc
BPOP
$11.2B
| $221K | ﹤0.01% |
2,700
-1,500
| -36% | -$122K |
|
5041
PUT
Manulife Financial
MFC
$73.9B
| $221K | ﹤0.01% |
11,600
-71,200
| -86% | -$1.38M |
|
5042
Veritone
VERI
$101M
| $221K | ﹤0.01% |
9,857
+4,167
| +73% | +$107K |
|
|
ACCD
5043
CALL
DELISTED
Accolade Inc
ACCD
| $221K | ﹤0.01% |
8,400
-13,400
| -61% | -$439K |
|
5044
PUT
Ardagh Metal Packaging
AMBP
$2.83B
| $220K | ﹤0.01% |
+24,400
| New | +$232K |
|
5045
CALL
AMC Global Media
AMCX
$492M
| $220K | ﹤0.01% |
6,400
-4,000
| -38% | -$167K |
|
|
ASRT
5046
DELISTED
Assertio
ASRT
| $220K | ﹤0.01% |
6,730
+6,458
| +2,374% | +$132K |
|
5047
CALL
BWX Technologies
BWXT
$15.5B
| $220K | ﹤0.01% |
4,600
+400
| +10% | +$20.9K |
|
5048
CALL
Century Communities
CCS
$1.91B
| $220K | ﹤0.01% |
2,700
-5,900
| -69% | -$422K |
|
5049
Ondas Inc
ONDS
$4.27B
| $220K | ﹤0.01% |
+32,831
| New | +$281K |
|
5050
CALL
OR Royalties Inc
OR
$5.58B
| $220K | ﹤0.01% |
18,000
+1,400
| +8% | +$17.1K |
|
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.