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 | |
|---|---|---|---|---|---|---|
4901
PUT
Enova International
ENVA
$6.33B
| $241K | ﹤0.01% |
5,900
-3,500
| -37% | -$133K |
|
4902
Gartner
IT
$10.1B
| $241K | ﹤0.01% |
721
-5,152
| -88% | -$1.66M |
|
|
VLTA
4903
PUT
DELISTED
Volta Inc.
VLTA
| $241K | ﹤0.01% |
+32,900
| New | +$289K |
|
|
WLL
4904
DELISTED
Whiting Petroleum Corporation
WLL
| $241K | ﹤0.01% |
3,736
+2,308
| +162% | +$151K |
|
4905
CALL
Ameren
AEE
$30.3B
| $240K | ﹤0.01% |
2,700
-28,100
| -91% | -$2.39M |
|
4906
Aurora
AUR
$12.6B
| $240K | ﹤0.01% |
+21,402
| New | +$237K |
|
4907
PUT
BBVA Argentina
BBAR
$3.87B
| $240K | ﹤0.01% |
76,400
-54,400
| -42% | -$193K |
|
4908
PUT
ING
ING
$99.8B
| $240K | ﹤0.01% |
17,300
-31,800
| -65% | -$462K |
|
|
NGD
4909
CALL
DELISTED
New Gold Inc
NGD
| $240K | ﹤0.01% |
160,500
+93,900
| +141% | +$135K |
|
|
ORGN
4910
DELISTED
Origin Materials
ORGN
| $240K | ﹤0.01% |
1,241
+232
| +23% | +$45.9K |
|
4911
Constellation Brands
STZ
$22.2B
| $240K | ﹤0.01% |
+959
| New | +$219K |
|
4912
CALL
Tradeweb Markets
TW
$21.4B
| $240K | ﹤0.01% |
2,400
-9,700
| -80% | -$895K |
|
|
MDC
4913
PUT
DELISTED
M.D.C. Holdings, Inc.
MDC
| $240K | ﹤0.01% |
4,300
-1,316
| -23% | -$67K |
|
4914
PUT
CubeSmart
CUBE
$9.39B
| $239K | ﹤0.01% |
4,200
+3,800
| +950% | +$204K |
|
4915
PUT
Insulet
PODD
$11.5B
| $239K | ﹤0.01% |
900
+700
| +350% | +$203K |
|
4916
PUT
Retractable Technologies
RVP
$19.8M
| $239K | ﹤0.01% |
34,600
-55,900
| -62% | -$483K |
|
|
CLR
4917
DELISTED
CONTINENTAL RESOURCES INC.
CLR
| $239K | ﹤0.01% |
+5,356
| New | +$255K |
|
|
FYBR
4918
PUT
DELISTED
Frontier Communications
FYBR
| $238K | ﹤0.01% |
8,100
+6,300
| +350% | +$195K |
|
4919
CALL
IDT Corp
IDT
$1.64B
| $238K | ﹤0.01% |
5,400
+3,100
| +135% | +$158K |
|
4920
Puma Biotechnology
PBYI
$404M
| $238K | ﹤0.01% |
78,512
+75,870
| +2,872% | +$329K |
|
4921
Vanguard Total International Stock ETF
VXUS
$155B
| $238K | ﹤0.01% |
3,759
+2,411
| +179% | +$155K |
|
|
CNR
4922
CALL
Core Natural Resources Inc
CNR
$4.02B
| $238K | ﹤0.01% |
10,500
-11,500
| -52% | -$298K |
|
|
DBD
4923
PUT
DELISTED
Diebold Nixdorf Incorporated
DBD
| $238K | ﹤0.01% |
26,400
+2,100
| +9% | +$19.5K |
|
4924
CALL
Brinker International
EAT
$9.17B
| $237K | ﹤0.01% |
6,500
-53,700
| -89% | -$2.22M |
|
4925
PUT
JFrog
FROG
$9.66B
| $237K | ﹤0.01% |
8,000
-700
| -8% | -$23.1K |
|
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.