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 | |
|---|---|---|---|---|---|---|
|
BRG
2876
CALL
DELISTED
Bluerock Residential Growth REIT, Inc.
BRG
| $979K | ﹤0.01% |
37,100
+7,300
| +24% | +$116K |
|
2877
PUT
Vicor
VICR
$9.07B
| $977K | ﹤0.01% |
7,700
+7,300
| +1,825% | +$1.03M |
|
2878
CALL
Penumbra
PEN
$12.6B
| $976K | ﹤0.01% |
3,400
-1,700
| -33% | -$449K |
|
2879
PUT
Williams Companies
WMB
$87.8B
| $976K | ﹤0.01% |
37,500
-113,600
| -75% | -$3.14M |
|
2880
CALL
Hayward Holdings
HAYW
$3.15B
| $975K | ﹤0.01% |
37,200
+32,400
| +675% | +$786K |
|
2881
CALL
Sun Life Financial
SLF
$45.8B
| $974K | ﹤0.01% |
17,500
-22,400
| -56% | -$1.24M |
|
2882
CALL
Xenon Pharmaceuticals
XENE
$6.3B
| $974K | ﹤0.01% |
31,200
+30,000
| +2,500% | +$896K |
|
2883
CALL
Ameris Bancorp
ABCB
$5.79B
| $973K | ﹤0.01% |
19,600
+9,900
| +102% | +$512K |
|
2884
CALL
Gevo
GEVO
$382M
| $973K | ﹤0.01% |
227,500
-73,800
| -24% | -$452K |
|
2885
PUT
Madison Square Garden
MSGS
$9.53B
| $972K | ﹤0.01% |
5,600
+300
| +6% | +$54.5K |
|
2886
CALL
RLX Technology
RLX
$2.49B
| $972K | ﹤0.01% |
249,300
-39,700
| -14% | -$183K |
|
2887
Woodward
WWD
$24.8B
| $972K | ﹤0.01% |
8,883
+8,531
| +2,424% | +$958K |
|
2888
CALL
On Holding
ONON
$12.4B
| $971K | ﹤0.01% |
+25,700
| New | +$943K |
|
2889
CALL
United Microelectronic
UMC
$47.3B
| $971K | ﹤0.01% |
83,000
-112,100
| -57% | -$1.25M |
|
2890
PUT
Darling Ingredients
DAR
$9.52B
| $970K | ﹤0.01% |
14,000
-21,600
| -61% | -$1.57M |
|
2891
CALL
Mercury Insurance
MCY
$5.99B
| $970K | ﹤0.01% |
18,300
+17,400
| +1,933% | +$935K |
|
2892
CALL
Ouster
OUST
$2.33B
| $970K | ﹤0.01% |
18,670
+11,730
| +169% | +$762K |
|
2893
CALL
Tronox
TROX
$964M
| $970K | ﹤0.01% |
40,400
+16,600
| +70% | +$397K |
|
2894
PUT
Empire State Realty Trust
ESRT
$971M
| $969K | ﹤0.01% |
108,900
-14,200
| -12% | -$140K |
|
|
GPMT
2895
Granite Point Mortgage Trust
GPMT
$64.7M
| $969K | ﹤0.01% |
+82,771
| New | +$1.06M |
|
|
PLYA
2896
CALL
DELISTED
Playa Hotels & Resorts
PLYA
| $969K | ﹤0.01% |
121,500
+57,500
| +90% | +$461K |
|
2897
CALL
TE Connectivity
TEL
$59.5B
| $968K | ﹤0.01% |
6,000
+500
| +9% | +$77.3K |
|
|
CPUH
2898
CALL
DELISTED
Compute Health Acquisition Corp.
CPUH
| $967K | ﹤0.01% |
99,400
+86,800
| +689% | +$849K |
|
|
IPG
2899
CALL
DELISTED
Interpublic Group of Companies
IPG
| $966K | ﹤0.01% |
25,800
-4,500
| -15% | -$164K |
|
2900
CALL
Xerox
XRX
$360M
| $966K | ﹤0.01% |
42,700
+9,900
| +30% | +$201K |
|
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.