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 | |
|---|---|---|---|---|---|---|
2576
PUT
Groupon
GRPN
$980M
| $1.24M | ﹤0.01% |
55,200
+31,900
| +137% | +$744K |
|
2577
CALL
Shutterstock
SSTK
$205M
| $1.24M | ﹤0.01% |
11,200
+3,400
| +44% | +$396K |
|
2578
Vanguard Mid-Cap Growth ETF
VOT
$19B
| $1.24M | ﹤0.01% |
4,874
+2,504
| +106% | +$631K |
|
2579
PUT
Fossil Group
FOSL
$239M
| $1.24M | ﹤0.01% |
120,500
+84,800
| +238% | +$1.03M |
|
2580
Cencora
COR
$60.3B
| $1.24M | ﹤0.01% |
9,317
-412
| -4% | -$50.7K |
|
2581
PUT
Quanta Services
PWR
$93.9B
| $1.24M | ﹤0.01% |
10,800
-300
| -3% | -$34.6K |
|
2582
PUT
C.H. Robinson
CHRW
$22B
| $1.24M | ﹤0.01% |
11,500
+8,700
| +311% | +$845K |
|
|
CTLP
2583
CALL
DELISTED
Cantaloupe
CTLP
| $1.24M | ﹤0.01% |
139,100
-6,300
| -4% | -$62.7K |
|
|
FL
2584
CALL
DELISTED
Foot Locker
FL
| $1.23M | ﹤0.01% |
28,300
-900
| -3% | -$42.8K |
|
2585
PUT
BlackLine
BL
$1.69B
| $1.23M | ﹤0.01% |
11,900
+1,200
| +11% | +$139K |
|
2586
CALL
Concentrix
CNXC
$1.36B
| $1.23M | ﹤0.01% |
6,900
+4,100
| +146% | +$732K |
|
2587
CALL
Invesco CurrencyShares Canadian Dollar Trust
FXC
$69.2M
| $1.23M | ﹤0.01% |
15,900
-42,700
| -73% | -$3.32M |
|
2588
CALL
Universal Health Services
UHS
$9.43B
| $1.23M | ﹤0.01% |
9,500
+4,000
| +73% | +$514K |
|
2589
CALL
Equinox Gold
EQX
$7.32B
| $1.23M | ﹤0.01% |
182,100
+47,300
| +35% | +$345K |
|
2590
PUT
Infosys
INFY
$45B
| $1.23M | ﹤0.01% |
48,600
-57,000
| -54% | -$1.32M |
|
2591
Qiagen
QGEN
$8.53B
| $1.23M | ﹤0.01% |
20,883
+16,282
| +354% | +$933K |
|
2592
PUT
Winnebago Industries
WGO
$870M
| $1.23M | ﹤0.01% |
16,400
-43,800
| -73% | -$3.15M |
|
2593
PUT
Snap-on
SNA
$20.9B
| $1.23M | ﹤0.01% |
5,700
+3,900
| +217% | +$833K |
|
2594
CALL
Zevra Therapeutics
ZVRA
$563M
| $1.23M | ﹤0.01% |
140,900
+12,600
| +10% | +$112K |
|
2595
PUT
Sprout Social
SPT
$455M
| $1.22M | ﹤0.01% |
13,500
+12,200
| +938% | +$1.38M |
|
2596
Blackstone
BX
$104B
| $1.22M | ﹤0.01% |
9,454
-63,673
| -87% | -$8.49M |
|
2597
PUT
Sasol
SSL
$7.58B
| $1.22M | ﹤0.01% |
74,600
+11,400
| +18% | +$197K |
|
|
IMGN
2598
CALL
DELISTED
Immunogen Inc
IMGN
| $1.22M | ﹤0.01% |
164,900
-28,100
| -15% | -$175K |
|
2599
CALL
Popular Inc
BPOP
$11B
| $1.22M | ﹤0.01% |
14,900
+14,600
| +4,867% | +$1.18M |
|
2600
CALL
Celsius Holdings
CELH
$6.93B
| $1.22M | ﹤0.01% |
49,200
-87,900
| -64% | -$2.43M |
|
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.