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 | Miscellaneous | 97.43% |
| 2 | Technology | 0.63% |
| 3 | Consumer Discretionary | 0.43% |
| 4 | Healthcare | 0.36% |
| 5 | Communication Services | 0.23% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
926
CALL
Under Armour Class C
UA
$2.2B
| $7.85M | 0.01% |
407,800
-74,700
| -15% | -$1.45M |
|
|
FTCH
927
PUT
DELISTED
Farfetch Limited Class A Ordinary Shares
FTCH
| $7.85M | 0.01% |
234,900
-3,400
| -1% | -$125K |
|
928
PUT
Allstate
ALL
$65.6B
| $7.83M | 0.01% |
66,600
-20,300
| -23% | -$2.4M |
|
929
CALL
BHP
BHP
$230B
| $7.82M | 0.01% |
145,170
-93,043
| -39% | -$4.65M |
|
930
CALL
Fidelity National Information Services
FIS
$21.6B
| $7.82M | 0.01% |
71,600
+9,900
| +16% | +$1.12M |
|
931
PUT
Citizens Financial Group
CFG
$29.8B
| $7.8M | 0.01% |
207,400
+105,700
| +104% | +$5.09M |
|
932
PUT
Doximity
DOCS
$4.7B
| $7.79M | 0.01% |
+155,300
| New | +$10.1M |
|
933
CALL
MP Materials
MP
$9.71B
| $7.78M | 0.01% |
171,400
+61,000
| +55% | +$2.4M |
|
934
PUT
HDFC Bank
HDB
$119B
| $7.78M | 0.01% |
239,200
+162,800
| +213% | +$5.7M |
|
935
CALL
UiPath
PATH
$7.87B
| $7.76M | 0.01% |
180,000
+94,500
| +111% | +$4.66M |
|
936
PUT
APA Corp
APA
$15B
| $7.74M | 0.01% |
287,900
-228,600
| -44% | -$6.07M |
|
937
CALL
Ericsson
ERIC
$33B
| $7.74M | 0.01% |
711,900
+402,900
| +130% | +$4.4M |
|
|
CTXS
938
DELISTED
Citrix Systems Inc
CTXS
| $7.74M | 0.01% |
81,775
+77,630
| +1,873% | +$7.09M |
|
939
Coinbase
COIN
$48.7B
| $7.73M | 0.01% |
30,635
-26,737
| -47% | -$7.77M |
|
|
PARA
940
DELISTED
Paramount Global Class B
PARA
| $7.73M | 0.01% |
256,096
+124,181
| +94% | +$4.28M |
|
941
CALL
Teradyne
TER
$55.8B
| $7.72M | 0.01% |
47,200
-23,600
| -33% | -$3.32M |
|
|
NKLA
942
PUT
DELISTED
Nikola Corporation Common Stock
NKLA
| $7.71M | 0.01% |
26,037
-96
| -0.4% | -$32K |
|
943
PUT
Capri Holdings
CPRI
$1.54B
| $7.64M | 0.01% |
117,700
-111,800
| -49% | -$6.62M |
|
944
CALL
Acadia Pharmaceuticals
ACAD
$4.83B
| $7.61M | 0.01% |
326,100
+278,900
| +591% | +$5.61M |
|
945
CALL
Lightspeed Commerce
LSPD
$1.36B
| $7.6M | 0.01% |
188,000
+170,300
| +962% | +$11.6M |
|
946
CALL
Progressive
PGR
$127B
| $7.6M | 0.01% |
74,000
+26,400
| +55% | +$2.52M |
|
947
CALL
Energy Transfer Partners
ET
$74B
| $7.57M | 0.01% |
920,100
-63,200
| -6% | -$574K |
|
|
FL
948
PUT
DELISTED
Foot Locker
FL
| $7.57M | 0.01% |
173,500
+45,700
| +36% | +$2.17M |
|
949
PUT
First Trust Natural Gas ETF
FCG
$688M
| $7.55M | 0.01% |
37,800
+16,300
| +76% | +$292K |
|
950
PUT
HCA Healthcare
HCA
$87.7B
| $7.53M | 0.01% |
29,300
-15,200
| -34% | -$3.72M |
|
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's Q4 2021 filing shows 2,268 new, 3,786 increased, 4,257 reduced and 1,643 closed positions. Its largest new stake was iShares China Large-Cap ETF: 902,666 shares worth $33M. The largest sale was AMC Entertainment Holdings, an estimated $49.5M.
By sector, the portfolio is most concentrated in Miscellaneous at 97% of assets, down from 98% a quarter earlier, followed by Technology and Consumer Discretionary.
- 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 2,268 new positions and closed 1,643 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.