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 |
Boeing
BA
|
+$55.8M |
| 2 |
Microsoft
MSFT
|
+$42.2M |
| 3 |
Pinduoduo
PDD
|
+$41.3M |
| 4 |
Apple
AAPL
|
+$32M |
| 5 |
Direxion Daily Semiconductor Bull 3X ETF
SOXL
|
+$28.3M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Broadcom
AVGO
|
+$95.2M |
| 2 |
Citigroup
C
|
+$57.2M |
| 3 |
Pfizer
PFE
|
+$56.4M |
| 4 |
TSMC
TSM
|
+$39.7M |
| 5 |
Starbucks
SBUX
|
+$35.5M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.4% |
| 2 | Consumer Discretionary | 0.29% |
| 3 | Healthcare | 0.15% |
| 4 | Industrials | 0.13% |
| 5 | Financials | 0.13% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
3151
PUT
Amylyx Pharmaceuticals
AMLX
$2.12B
| $780K | ﹤0.01% |
240,900
-292,900
| -55% | -$658K |
|
3152
CALL
International Money Express
IMXI
$389M
| $780K | ﹤0.01% |
+42,200
| New | +$805K |
|
3153
Grand Canyon Education
LOPE
$3.82B
| $780K | ﹤0.01% |
5,504
+1,211
| +28% | +$175K |
|
3154
CALL
Jazz Pharmaceuticals
JAZZ
$16B
| $779K | ﹤0.01% |
7,000
-5,900
| -46% | -$647K |
|
3155
CALL
Seadrill
SDRL
$2.71B
| $778K | ﹤0.01% |
19,600
-4,500
| -19% | -$207K |
|
3156
Viking Holdings
VIK
$44.6B
| $777K | ﹤0.01% |
22,284
+20,635
| +1,251% | +$706K |
|
|
JMIA
3157
CALL
Jumia Technologies
JMIA
$754M
| $776K | ﹤0.01% |
145,400
-44,500
| -23% | -$329K |
|
|
NARI
3158
CALL
DELISTED
Inari Medical, Inc. Common Stock
NARI
| $775K | ﹤0.01% |
18,800
-200
| -1% | -$9.6K |
|
|
GRFS
3159
PUT
Grifois
GRFS
$5.29B
| $772K | ﹤0.01% |
87,000
-127,900
| -60% | -$1.04M |
|
|
ZK
3160
DELISTED
Zeekr
ZK
| $772K | ﹤0.01% |
34,660
+33,367
| +2,581% | +$565K |
|
3161
PUT
MINISO
MNSO
$3.74B
| $771K | ﹤0.01% |
44,000
+1,900
| +5% | +$31.2K |
|
3162
PUT
Vermilion Energy
VET
$1.66B
| $770K | ﹤0.01% |
78,900
-17,300
| -18% | -$176K |
|
3163
PUT
BorgWarner
BWA
$12.9B
| $769K | ﹤0.01% |
21,200
-21,400
| -50% | -$706K |
|
3164
CALL
Cullinan Oncology
CGEM
$1.07B
| $768K | ﹤0.01% |
45,900
+18,600
| +68% | +$330K |
|
3165
EPAM Systems
EPAM
$4.86B
| $768K | ﹤0.01% |
3,862
-5,286
| -58% | -$1.06M |
|
3166
PUT
ING
ING
$95.1B
| $768K | ﹤0.01% |
42,300
+20,600
| +95% | +$368K |
|
3167
CALL
Rollins
ROL
$19B
| $768K | ﹤0.01% |
15,200
+5,300
| +54% | +$262K |
|
3168
CALL
Varonis Systems
VRNS
$5.28B
| $768K | ﹤0.01% |
13,600
+5,200
| +62% | +$273K |
|
3169
CALL
Acadia Healthcare
ACHC
$3.07B
| $767K | ﹤0.01% |
12,100
+11,500
| +1,917% | +$830K |
|
3170
PUT
Frontline
FRO
$8.65B
| $767K | ﹤0.01% |
33,600
+10,600
| +46% | +$250K |
|
3171
PUT
Hartford Financial Services
HIG
$38.6B
| $764K | ﹤0.01% |
6,500
-62,300
| -91% | -$6.83M |
|
3172
Progress Software
PRGS
$1.63B
| $764K | ﹤0.01% |
11,349
-5,710
| -33% | -$327K |
|
3173
PUT
Invesco DB US Dollar Index Bullish Fund
UUP
$426M
| $764K | ﹤0.01% |
27,200
+14,600
| +116% | +$416K |
|
|
APLT
3174
PUT
DELISTED
Applied Therapeutics
APLT
| $763K | ﹤0.01% |
89,800
+78,500
| +695% | +$463K |
|
|
LINE
3175
Lineage Inc
LINE
$9.58B
| $763K | ﹤0.01% |
+9,746
| New | +$815K |
|
Similar funds
Simplex Trading's Q3 2024 Portfolio in Review
As of Q3 2024, Simplex Trading held 9,964 positions worth $170B, up 5.3% from $162B the previous quarter. Its ten largest holdings account for 50% of the portfolio.
Simplex Trading's Q3 2024 filing shows 1,185 new, 3,232 increased, 3,829 reduced and 1,476 closed positions. Its largest new stake was Boeing: 325,328 shares worth $49.5M. The largest sale was Broadcom, an estimated $95.2M.
By sector, the portfolio is most concentrated in Technology at 0.4% of assets, down from 0.53% a quarter earlier, followed by Consumer Discretionary and Healthcare.
- Simplex Trading's largest Q3 2024 buy was Boeing: 325,328 shares worth $49.5M.
- Simplex Trading added most to Pinduoduo in Q3 2024, an estimated $41.3M increase.
- Simplex Trading's biggest Q3 2024 reduction was Citigroup, cutting an estimated $57.2M.
- Simplex Trading fully exited Broadcom in Q3 2024, selling an estimated $95.2M.
- Simplex Trading's ten largest holdings make up 50% of its $170B portfolio in Q3 2024.
- Simplex Trading opened 1,185 new positions and closed 1,476 in Q3 2024.
- Simplex Trading's portfolio value rose 5.3% quarter-over-quarter to $170B.
Based on Simplex Trading's 13F filing for Q3 2024, filed 8 Nov 2024.