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 | |
|---|---|---|---|---|---|---|
5676
American Resources Corp
AREC
$217M
| $142K | ﹤0.01% |
79,108
-25,262
| -24% | -$52.7K |
|
5677
Brinker International
EAT
$9.66B
| $142K | ﹤0.01% |
3,889
-5,079
| -57% | -$210K |
|
5678
CALL
EnerSys
ENS
$6.88B
| $142K | ﹤0.01% |
1,800
+900
| +100% | +$70.3K |
|
|
CBIO
5679
Crescent Biopharma
CBIO
$552M
| $142K | ﹤0.01% |
+993
| New | +$180K |
|
5680
PUT
Ingersoll Rand
IR
$34.4B
| $142K | ﹤0.01% |
2,300
-500
| -18% | -$28.5K |
|
5681
PUT
Kinsale Capital Group
KNSL
$8.21B
| $142K | ﹤0.01% |
600
+100
| +20% | +$19.7K |
|
5682
loanDepot
LDI
$586M
| $142K | ﹤0.01% |
+29,655
| New | +$174K |
|
5683
CALL
MSC Industrial Direct
MSM
$6.98B
| $142K | ﹤0.01% |
1,700
-8,800
| -84% | -$736K |
|
|
SVM
5684
PUT
Silvercorp Metals
SVM
$2.11B
| $142K | ﹤0.01% |
38,000
-23,300
| -38% | -$94.4K |
|
5685
CALL
Teekay Tankers
TNK
$2.79B
| $142K | ﹤0.01% |
13,100
-13,100
| -50% | -$166K |
|
|
AKTS
5686
DELISTED
Akoustis Technologies Inc
AKTS
| $142K | ﹤0.01% |
21,359
-10,073
| -32% | -$75.2K |
|
|
VCRA
5687
PUT
DELISTED
VOCERA COMMUNICATIONS, INC.
VCRA
| $142K | ﹤0.01% |
2,200
+700
| +47% | +$39.4K |
|
5688
PUT
Amplify Energy
AMPY
$166M
| $141K | ﹤0.01% |
45,600
+45,100
| +9,020% | +$151K |
|
|
APLS
5689
CALL
DELISTED
Apellis Pharmaceuticals
APLS
| $141K | ﹤0.01% |
3,000
-14,400
| -83% | -$567K |
|
|
APLS
5690
PUT
DELISTED
Apellis Pharmaceuticals
APLS
| $141K | ﹤0.01% |
3,000
-2,100
| -41% | -$82.7K |
|
5691
PUT
MidCap Financial Investment
MFIC
$801M
| $141K | ﹤0.01% |
11,100
-14,800
| -57% | -$194K |
|
|
OPI
5692
PUT
DELISTED
Office Properties Income Trust
OPI
| $141K | ﹤0.01% |
5,700
+5,200
| +1,040% | +$134K |
|
5693
State Street SPDR Dow Jones REIT ETF
RWR
$1.99B
| $141K | ﹤0.01% |
+1,159
| New | +$133K |
|
|
TEN
5694
PUT
Tsakos Energy Navigation Ltd
TEN
$1.19B
| $141K | ﹤0.01% |
19,500
+11,900
| +157% | +$101K |
|
|
NS
5695
PUT
DELISTED
NuStar Energy L.P.
NS
| $141K | ﹤0.01% |
8,900
+2,200
| +33% | +$34.2K |
|
|
GLOP
5696
CALL
DELISTED
GASLOG PARTNERS LP
GLOP
| $141K | ﹤0.01% |
33,300
+25,700
| +338% | +$123K |
|
5697
Agios Pharmaceuticals
AGIO
$1.82B
| $140K | ﹤0.01% |
4,260
-1,455
| -25% | -$58.6K |
|
5698
PUT
American Vanguard Corp
AVD
$70.4M
| $140K | ﹤0.01% |
8,600
+6,500
| +310% | +$102K |
|
5699
PUT
Cohu
COHU
$2.3B
| $140K | ﹤0.01% |
3,700
-1,200
| -24% | -$41.1K |
|
5700
PUT
Imperial Oil
IMO
$61.1B
| $140K | ﹤0.01% |
3,900
-31,600
| -89% | -$1.09M |
|
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.