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 | |
|---|---|---|---|---|---|---|
3526
CALL
Redwire
RDW
$2.02B
| $614K | ﹤0.01% |
+91,100
| New | +$877K |
|
3527
Wyndham Hotels & Resorts
WH
$5.6B
| $614K | ﹤0.01% |
+6,852
| New | +$573K |
|
|
EBIX
3528
CALL
DELISTED
Ebix Inc
EBIX
| $614K | ﹤0.01% |
20,200
-3,500
| -15% | -$112K |
|
3529
PUT
Century Communities
CCS
$2.05B
| $613K | ﹤0.01% |
7,500
-1,700
| -18% | -$122K |
|
3530
CALL
Commercial Metals
CMC
$7.77B
| $613K | ﹤0.01% |
16,900
-4,100
| -20% | -$136K |
|
3531
Schneider National
SNDR
$6.41B
| $613K | ﹤0.01% |
22,796
+16,701
| +274% | +$419K |
|
|
SP
3532
PUT
DELISTED
SP Plus Corporation
SP
| $612K | ﹤0.01% |
21,700
-21,000
| -49% | -$629K |
|
3533
PUT
HealthEquity
HQY
$8.5B
| $610K | ﹤0.01% |
13,800
+10,100
| +273% | +$588K |
|
3534
Bruker
BRKR
$9.57B
| $609K | ﹤0.01% |
+7,262
| New | +$582K |
|
3535
CALL
Textron
TXT
$15.8B
| $609K | ﹤0.01% |
7,900
+6,600
| +508% | +$490K |
|
|
BCLI
3536
CALL
DELISTED
BRAINSTORM CELL THERAPUTC
BCLI
| $608K | ﹤0.01% |
10,140
-1,147
| -10% | -$56.5K |
|
3537
CALL
DHT Holdings
DHT
$3B
| $608K | ﹤0.01% |
117,200
+52,500
| +81% | +$314K |
|
3538
CALL
Sempra
SRE
$59.6B
| $608K | ﹤0.01% |
9,200
-44,200
| -83% | -$2.8M |
|
3539
CALL
BioXcel Therapeutics
BTAI
$26M
| $607K | ﹤0.01% |
1,869
+1,600
| +595% | +$687K |
|
|
HIVE
3540
CALL
HIVE Digital Technologies
HIVE
$749M
| $607K | ﹤0.01% |
+46,060
| New | +$792K |
|
3541
CALL
Old Republic International
ORI
$10.7B
| $607K | ﹤0.01% |
24,700
+8,900
| +56% | +$221K |
|
3542
PUT
Synaptics
SYNA
$4.33B
| $607K | ﹤0.01% |
2,100
-27,100
| -93% | -$6.47M |
|
3543
CALL
Kartoon Studios
TOON
$34.4M
| $606K | ﹤0.01% |
57,770
-4,110
| -7% | -$53.7K |
|
|
TCS
3544
CALL
DELISTED
THE CONTAINER STORE GROUP, INC.
TCS
| $606K | ﹤0.01% |
4,053
+3,000
| +285% | +$507K |
|
3545
PUT
Alpha and Omega Semiconductor
AOSL
$877M
| $605K | ﹤0.01% |
10,000
-7,600
| -43% | -$329K |
|
3546
CALL
Zentalis Pharmaceuticals
ZNTL
$327M
| $605K | ﹤0.01% |
7,200
+7,000
| +3,500% | +$542K |
|
3547
PUT
Expeditors International
EXPD
$22.4B
| $604K | ﹤0.01% |
4,500
+4,400
| +4,400% | +$551K |
|
3548
CALL
Fortuna Silver Mines
FSM
$2.55B
| $604K | ﹤0.01% |
155,100
+200
| +0.1% | +$823 |
|
3549
ProShares Ultra Bloomberg Natural Gas
BOIL
$327M
| $603K | ﹤0.01% |
116
-55
| -32% | -$575K |
|
3550
ARK Space & Defense Innovation ETF
ARKX
$789M
| $601K | ﹤0.01% |
31,926
+12,656
| +66% | +$250K |
|
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.