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 | |
|---|---|---|---|---|---|---|
751
CALL
Align Technology
ALGN
$12B
| $10.6M | 0.01% |
16,100
+1,700
| +12% | +$1.09M |
|
752
PUT
Arista Networks
ANET
$222B
| $10.5M | 0.01% |
293,200
-337,200
| -53% | -$10.1M |
|
753
PUT
AB InBev
BUD
$155B
| $10.5M | 0.01% |
174,000
-71,500
| -29% | -$4.16M |
|
754
Li Auto
LI
$12.3B
| $10.5M | 0.01% |
328,076
+322,238
| +5,520% | +$9.94M |
|
755
PUT
FuboTV Inc
FUBO
$254M
| $10.5M | 0.01% |
56,392
-20,408
| -27% | -$5.74M |
|
756
CALL
Domino's
DPZ
$10.7B
| $10.5M | 0.01% |
18,600
-5,800
| -24% | -$2.95M |
|
757
PUT
Robinhood
HOOD
$91.2B
| $10.5M | 0.01% |
+590,900
| New | +$18.2M |
|
758
CALL
First Trust Natural Gas ETF
FCG
$636M
| $10.4M | 0.01% |
81,700
+6,100
| +8% | +$109K |
|
759
CALL
Sony
SONY
$122B
| $10.4M | 0.01% |
412,500
-266,000
| -39% | -$6.33M |
|
760
Intuitive Surgical
ISRG
$119B
| $10.4M | 0.01% |
28,996
-66,536
| -70% | -$22.9M |
|
761
SPDR Gold Trust
GLD
$130B
| $10.4M | 0.01% |
60,891
+53,344
| +707% | +$8.96M |
|
762
PUT
RingCentral
RNG
$3.24B
| $10.4M | 0.01% |
55,500
+12,200
| +28% | +$2.71M |
|
|
XYZ
763
Block Inc
XYZ
$45.5B
| $10.4M | 0.01% |
64,379
+64,279
| +64,279% | +$13.9M |
|
764
PUT
Mondelez International
MDLZ
$77.1B
| $10.4M | 0.01% |
156,700
+141,600
| +938% | +$8.74M |
|
765
PUT
Agnico Eagle Mines
AEM
$72.3B
| $10.4M | 0.01% |
195,500
+108,100
| +124% | +$5.75M |
|
766
Lockheed Martin
LMT
$131B
| $10.4M | 0.01% |
+29,159
| New | +$10.1M |
|
767
CALL
Waste Management
WM
$95.3B
| $10.3M | 0.01% |
62,000
-39,500
| -39% | -$6.35M |
|
|
K
768
CALL
DELISTED
Kellanova
K
| $10.3M | 0.01% |
170,933
+126,629
| +286% | +$7.47M |
|
769
CALL
Keysight
KEYS
$55.6B
| $10.3M | 0.01% |
50,000
+7,000
| +16% | +$1.31M |
|
770
Novartis
NVS
$297B
| $10.3M | 0.01% |
117,859
+113,384
| +2,534% | +$9.41M |
|
771
PUT
Kraft Heinz
KHC
$30.1B
| $10.3M | 0.01% |
286,900
+95,200
| +50% | +$3.42M |
|
772
CALL
Encompass Health
EHC
$11B
| $10.3M | 0.01% |
198,355
+170,450
| +611% | +$8.79M |
|
773
CALL
Johnson Controls International
JCI
$87.4B
| $10.3M | 0.01% |
126,600
-91,500
| -42% | -$6.92M |
|
774
CALL
Air Products & Chemicals
APD
$65.5B
| $10.3M | 0.01% |
33,800
+3,800
| +13% | +$1.12M |
|
775
PUT
Fortinet
FTNT
$111B
| $10.2M | 0.01% |
142,500
-218,500
| -61% | -$14.4M |
|
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.