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 | |
|---|---|---|---|---|---|---|
5876
CALL
Ceragon Networks
CRNT
$209M
| $126K | ﹤0.01% |
49,200
-26,500
| -35% | -$79.8K |
|
5877
CALL
Dogness International Corp
DOGZ
$13.8M
| $126K | ﹤0.01% |
+750
| New | +$70K |
|
5878
Foghorn Therapeutics
FHTX
$285M
| $126K | ﹤0.01% |
+5,548
| New | +$79.7K |
|
5879
PUT
Mitek Systems
MITK
$800M
| $126K | ﹤0.01% |
7,100
-7,900
| -53% | -$141K |
|
5880
PureCycle Technologies
PCT
$1.45B
| $126K | ﹤0.01% |
+13,210
| New | +$159K |
|
5881
Perdoceo Education
PRDO
$2.06B
| $126K | ﹤0.01% |
10,751
+7,094
| +194% | +$77.3K |
|
5882
CALL
PROG Holdings
PRG
$1.83B
| $126K | ﹤0.01% |
2,800
-31,000
| -92% | -$1.4M |
|
5883
Invesco S&P 500 Pure Growth ETF
RPG
$2.11B
| $126K | ﹤0.01% |
2,990
+2,490
| +498% | +$104K |
|
5884
ProShares Short Russell2000
RWM
$129M
| $126K | ﹤0.01% |
+6,059
| New | +$126K |
|
5885
Sunoco
SUN
$14B
| $126K | ﹤0.01% |
3,090
+1,728
| +127% | +$68.5K |
|
|
SUP
5886
DELISTED
Superior Industries International
SUP
| $126K | ﹤0.01% |
28,202
-72,344
| -72% | -$382K |
|
5887
PUT
Vishay Intertechnology
VSH
$5.96B
| $126K | ﹤0.01% |
5,800
-41,800
| -88% | -$858K |
|
|
QVCGA
5888
PUT
DELISTED
QVC Group Inc Series A
QVCGA
| $126K | ﹤0.01% |
332
-8,064
| -96% | -$3.64M |
|
|
HEP
5889
CALL
DELISTED
Holly Energy Partners, L.P.
HEP
| $126K | ﹤0.01% |
7,700
-6,200
| -45% | -$110K |
|
|
TMX
5890
CALL
DELISTED
Terminix Global Holdings, Inc.
TMX
| $126K | ﹤0.01% |
2,800
+2,100
| +300% | +$85.6K |
|
5891
PUT
Acco Brands
ACCO
$403M
| $125K | ﹤0.01% |
15,200
+12,200
| +407% | +$105K |
|
5892
Federal Agricultural Mortgage
AGM
$2.62B
| $125K | ﹤0.01% |
1,012
+889
| +723% | +$109K |
|
5893
Alzamend Neuro
ALZN
$6.95M
| $125K | ﹤0.01% |
+49
| New | +$152K |
|
5894
CALL
AXIS Capital
AXS
$7.57B
| $125K | ﹤0.01% |
2,300
-100
| -4% | -$5.17K |
|
5895
CALL
Bruker
BRKR
$7.66B
| $125K | ﹤0.01% |
1,500
-32,100
| -96% | -$2.57M |
|
5896
Direxion Daily Aerospace & Defense Bull 3X ETF
DFEN
$438M
| $125K | ﹤0.01% |
6,714
-4,540
| -40% | -$92K |
|
5897
Kamada
KMDA
$423M
| $125K | ﹤0.01% |
19,049
+14,701
| +338% | +$87.6K |
|
5898
Everspin Technologies
MRAM
$408M
| $125K | ﹤0.01% |
+11,093
| New | +$100K |
|
|
5899
CALL
Perdoceo Education
PRDO
$2.06B
| $125K | ﹤0.01% |
10,700
-110,000
| -91% | -$1.2M |
|
5900
PUT
Republic Services
RSG
$63.9B
| $125K | ﹤0.01% |
900
-600
| -40% | -$79.7K |
|
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.