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 | |
|---|---|---|---|---|---|---|
|
RMO
3901
CALL
DELISTED
Romeo Power, Inc.
RMO
| $468K | ﹤0.01% |
128,300
-23,500
| -15% | -$101K |
|
|
KYNB
3902
Kyntra Bio
KYNB
$28.2M
| $467K | ﹤0.01% |
1,326
-2,255
| -63% | -$702K |
|
3903
CALL
MBIA
MBI
$278M
| $467K | ﹤0.01% |
29,600
-34,900
| -54% | -$461K |
|
3904
CALL
Spero Therapeutics
SPRO
$69.5M
| $467K | ﹤0.01% |
29,200
+23,700
| +431% | +$376K |
|
3905
EPAM Systems
EPAM
$5.25B
| $466K | ﹤0.01% |
+698
| New | +$449K |
|
|
FLG
3906
PUT
Flagstar Bank National Association
FLG
$5.83B
| $466K | ﹤0.01% |
12,733
-17,634
| -58% | -$672K |
|
|
CONE
3907
PUT
DELISTED
CyrusOne Inc Common Stock
CONE
| $466K | ﹤0.01% |
5,200
-1,600
| -24% | -$136K |
|
3908
Coherent
COHR
$47.6B
| $465K | ﹤0.01% |
+6,807
| New | +$428K |
|
3909
CALL
HF Sinclair
DINO
$16.1B
| $465K | ﹤0.01% |
14,200
-12,700
| -47% | -$428K |
|
3910
PUT
Houlihan Lokey
HLI
$10.2B
| $465K | ﹤0.01% |
4,500
-2,300
| -34% | -$246K |
|
3911
Southern Copper
SCCO
$140B
| $465K | ﹤0.01% |
8,138
-13,141
| -62% | -$733K |
|
3912
PUT
Uranium Energy
UEC
$4.67B
| $465K | ﹤0.01% |
138,900
+4,600
| +3% | +$17.7K |
|
3913
Amneal Pharmaceuticals
AMRX
$5.99B
| $464K | ﹤0.01% |
+96,998
| New | +$484K |
|
3914
PUT
Safe Bulkers
SB
$761M
| $464K | ﹤0.01% |
123,200
-36,700
| -23% | -$150K |
|
3915
Bio-Techne
TECH
$11.2B
| $464K | ﹤0.01% |
+3,592
| New | +$440K |
|
|
SUNL
3916
CALL
DELISTED
Sunlight Financial Holdings, Inc.
SUNL
| $464K | ﹤0.01% |
+4,855
| New | +$467K |
|
|
TEN
3917
PUT
DELISTED
Tenneco Inc. Class A Voting Common Stock
TEN
| $464K | ﹤0.01% |
41,100
-26,200
| -39% | -$327K |
|
3918
CALL
AdvanSix
ASIX
$551M
| $463K | ﹤0.01% |
9,800
+1,300
| +15% | +$59.9K |
|
3919
JB Hunt Transport Services
JBHT
$26.1B
| $463K | ﹤0.01% |
+2,266
| New | +$436K |
|
3920
State Street SPDR S&P Bank ETF
KBE
$1.66B
| $463K | ﹤0.01% |
+8,490
| New | +$470K |
|
3921
CALL
Performance Food Group
PFGC
$18.1B
| $463K | ﹤0.01% |
10,100
-6,500
| -39% | -$296K |
|
3922
PUT
Xponential Fitness
XPOF
$282M
| $463K | ﹤0.01% |
+22,700
| New | +$421K |
|
|
LTHM
3923
CALL
DELISTED
Livent Corporation
LTHM
| $463K | ﹤0.01% |
19,000
+15,000
| +375% | +$407K |
|
3924
CALL
IAMGOLD
IAG
$8.24B
| $461K | ﹤0.01% |
147,600
+113,900
| +338% | +$334K |
|
|
NVNO
3925
CALL
enVVeno Medical
NVNO
$6.94M
| $461K | ﹤0.01% |
+2,000
| New | +$563K |
|
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.