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 | |
|---|---|---|---|---|---|---|
1226
Ford
F
$57.3B
| $7.41M | ﹤0.01% |
701,646
+609,031
| +658% | +$6.97M |
|
1227
PUT
Oneok
OKE
$58.7B
| $7.37M | ﹤0.01% |
80,900
-18,000
| -18% | -$1.57M |
|
1228
PUT
EPAM Systems
EPAM
$4.69B
| $7.36M | ﹤0.01% |
37,000
+700
| +2% | +$140K |
|
1229
PUT
Nextpower Inc
NXT
$15.2B
| $7.36M | ﹤0.01% |
196,500
+104,800
| +114% | +$4.37M |
|
1230
PUT
GE HealthCare
GEHC
$27.6B
| $7.34M | ﹤0.01% |
78,200
+2,700
| +4% | +$227K |
|
1231
PUT
LPL Financial
LPLA
$26.3B
| $7.33M | ﹤0.01% |
31,500
+27,900
| +775% | +$6.29M |
|
|
APLS
1232
CALL
DELISTED
Apellis Pharmaceuticals
APLS
| $7.32M | ﹤0.01% |
253,700
-3,400
| -1% | -$126K |
|
1233
CALL
Kohl's
KSS
$2.03B
| $7.3M | ﹤0.01% |
345,900
+143,700
| +71% | +$2.93M |
|
1234
PUT
Vornado Realty Trust
VNO
$7.47B
| $7.29M | ﹤0.01% |
185,100
+94,100
| +103% | +$3.03M |
|
1235
Palo Alto Networks
PANW
$264B
| $7.28M | ﹤0.01% |
42,596
-31,736
| -43% | -$5.34M |
|
1236
PUT
Boot Barn
BOOT
$4.55B
| $7.28M | ﹤0.01% |
43,500
+30,100
| +225% | +$4.14M |
|
1237
NIO
NIO
$11.3B
| $7.27M | ﹤0.01% |
1,088,972
+226,195
| +26% | +$1.04M |
|
1238
CALL
PureCycle Technologies
PCT
$1.17B
| $7.27M | ﹤0.01% |
765,700
+241,900
| +46% | +$1.62M |
|
1239
PUT
Archer Daniels Midland
ADM
$41.4B
| $7.25M | ﹤0.01% |
121,400
-195,600
| -62% | -$11.9M |
|
1240
PUT
Vaxcyte
PCVX
$7.89B
| $7.24M | ﹤0.01% |
63,400
+63,000
| +15,750% | +$5.68M |
|
1241
Stanley Black & Decker
SWK
$14.2B
| $7.22M | ﹤0.01% |
65,606
+58,757
| +858% | +$5.64M |
|
1242
CALL
MP Materials
MP
$7.35B
| $7.22M | ﹤0.01% |
409,000
+78,900
| +24% | +$1.07M |
|
1243
CALL
Bank of Montreal
BMO
$125B
| $7.22M | ﹤0.01% |
80,000
-53,400
| -40% | -$4.56M |
|
1244
AST SpaceMobile
ASTS
$16.8B
| $7.2M | ﹤0.01% |
275,492
+139,491
| +103% | +$3.15M |
|
1245
PUT
Fastenal
FAST
$54B
| $7.2M | ﹤0.01% |
201,600
-97,000
| -32% | -$3.28M |
|
1246
PUT
Dominion Energy
D
$62.5B
| $7.17M | ﹤0.01% |
124,100
+21,100
| +20% | +$1.15M |
|
1247
PUT
Transocean
RIG
$5.92B
| $7.15M | ﹤0.01% |
1,683,300
-60,100
| -3% | -$296K |
|
1248
CALL
Klaviyo
KVYO
$4.91B
| $7.1M | ﹤0.01% |
200,600
+155,400
| +344% | +$4.5M |
|
1249
PUT
Ameren
AEE
$31.5B
| $7.08M | ﹤0.01% |
80,900
-1,800
| -2% | -$144K |
|
1250
PUT
Planet Fitness
PLNT
$4.23B
| $7.07M | ﹤0.01% |
87,100
-121,100
| -58% | -$9.49M |
|
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.