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 | |
|---|---|---|---|---|---|---|
1276
CALL
Semtech
SMTC
$11.7B
| $4.54M | ﹤0.01% |
51,100
+47,900
| +1,497% | +$4.08M |
|
1277
CALL
PACCAR
PCAR
$69.6B
| $4.54M | ﹤0.01% |
77,100
-67,500
| -47% | -$3.9M |
|
1278
PUT
Agilent Technologies
A
$39.1B
| $4.53M | ﹤0.01% |
28,400
-7,400
| -21% | -$1.15M |
|
1279
PUT
Cameco
CCJ
$38.3B
| $4.53M | ﹤0.01% |
207,600
-133,600
| -39% | -$3.23M |
|
|
HSII
1280
CALL
DELISTED
Heidrick & Struggles
HSII
| $4.52M | ﹤0.01% |
103,300
+103,000
| +34,333% | +$4.69M |
|
1281
CALL
Akamai
AKAM
$16.8B
| $4.51M | ﹤0.01% |
38,500
-77,100
| -67% | -$8.48M |
|
1282
CALL
Universal Display
OLED
$3.71B
| $4.5M | ﹤0.01% |
27,300
+4,300
| +19% | +$709K |
|
1283
Blackrock
BLK
$164B
| $4.5M | ﹤0.01% |
4,915
+1,106
| +29% | +$1.01M |
|
1284
CALL
QuidelOrtho
QDEL
$1.09B
| $4.5M | ﹤0.01% |
33,300
+7,800
| +31% | +$1.09M |
|
|
DM
1285
PUT
DELISTED
Desktop Metal, Inc.
DM
| $4.49M | ﹤0.01% |
90,760
+74,580
| +461% | +$5.02M |
|
1286
BILL Holdings
BILL
$4.33B
| $4.49M | ﹤0.01% |
18,024
+275
| +2% | +$77.8K |
|
|
TSP
1287
CALL
DELISTED
TuSimple Holdings Inc. Class A Common Stock
TSP
| $4.49M | ﹤0.01% |
125,200
+68,200
| +120% | +$2.54M |
|
1288
PUT
GitLab
GTLB
$5.28B
| $4.47M | ﹤0.01% |
+51,400
| New | +$5.26M |
|
|
CPE
1289
CALL
DELISTED
Callon Petroleum Company
CPE
| $4.47M | ﹤0.01% |
141,500
-55,000
| -28% | -$2.94M |
|
|
SBNY
1290
PUT
DELISTED
Signature Bank
SBNY
| $4.46M | ﹤0.01% |
13,800
-29,200
| -68% | -$9.1M |
|
1291
PUT
Coty
COTY
$2.33B
| $4.46M | ﹤0.01% |
424,700
+205,400
| +94% | +$1.93M |
|
|
IPOF
1292
CALL
DELISTED
Social Capital Hedosophia Holdings Corp. VI
IPOF
| $4.46M | ﹤0.01% |
437,500
-79,300
| -15% | -$815K |
|
1293
PUT
Kirby Corp
KEX
$7.95B
| $4.46M | ﹤0.01% |
75,000
+74,300
| +10,614% | +$4.15M |
|
|
BGFV
1294
CALL
DELISTED
Big 5 Sporting Goods
BGFV
| $4.46M | ﹤0.01% |
234,400
+188,200
| +407% | +$4.7M |
|
1295
CALL
Aon
AON
$77.3B
| $4.45M | ﹤0.01% |
14,800
-58,400
| -80% | -$17.5M |
|
1296
PUT
DaVita
DVA
$15.1B
| $4.45M | ﹤0.01% |
39,100
-4,700
| -11% | -$505K |
|
1297
Johnson Controls International
JCI
$87.5B
| $4.45M | ﹤0.01% |
+54,678
| New | +$4.14M |
|
1298
PUT
FIVE9
FIVN
$1.77B
| $4.43M | ﹤0.01% |
32,300
+7,900
| +32% | +$1.17M |
|
|
BTWN
1299
CALL
DELISTED
Bridgetown Holdings Limited Class A Ordinary Shares
BTWN
| $4.43M | ﹤0.01% |
451,500
-87,600
| -16% | -$865K |
|
1300
PUT
Canadian Natural Resources
CNQ
$96.9B
| $4.43M | ﹤0.01% |
214,206
+53,705
| +33% | +$1.09M |
|
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.