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 | |
|---|---|---|---|---|---|---|
1376
CALL
MACOM Technology Solutions
MTSI
$20.4B
| $5.92M | ﹤0.01% |
53,200
+41,500
| +355% | +$4.35M |
|
|
FL
1377
CALL
DELISTED
Foot Locker
FL
| $5.91M | ﹤0.01% |
228,700
-36,300
| -14% | -$1M |
|
1378
PUT
United States Natural Gas Fund
UNG
$470M
| $5.91M | ﹤0.01% |
361,700
+55,600
| +18% | +$806K |
|
1379
CALL
Astera Labs
ALAB
$50B
| $5.9M | ﹤0.01% |
112,700
+48,700
| +76% | +$2.29M |
|
1380
CALL
Bath & Body Works
BBWI
$4.01B
| $5.9M | ﹤0.01% |
184,900
+83,600
| +83% | +$2.77M |
|
1381
Core Scientific
CORZ
$7.23B
| $5.89M | ﹤0.01% |
+496,450
| New | +$5.14M |
|
1382
CALL
Mativ Holdings
MATV
$448M
| $5.88M | ﹤0.01% |
346,200
+86,700
| +33% | +$1.52M |
|
1383
CALL
Madrigal Pharmaceuticals
MDGL
$12.6B
| $5.88M | ﹤0.01% |
27,700
-11,700
| -30% | -$2.99M |
|
1384
PUT
ArcBest
ARCB
$3.44B
| $5.88M | ﹤0.01% |
54,200
| – | – |
|
|
1385
PUT
Astera Labs
ALAB
$50B
| $5.86M | ﹤0.01% |
111,800
+28,900
| +35% | +$1.36M |
|
1386
PUT
Kinross Gold
KGC
$28.5B
| $5.83M | ﹤0.01% |
623,400
+167,500
| +37% | +$1.5M |
|
|
HES
1387
PUT
DELISTED
Hess
HES
| $5.83M | ﹤0.01% |
42,900
+1,600
| +4% | +$223K |
|
1388
PUT
JB Hunt Transport Services
JBHT
$27.1B
| $5.82M | ﹤0.01% |
33,800
+1,700
| +5% | +$286K |
|
1389
PUT
Hyatt Hotels
H
$17.6B
| $5.8M | ﹤0.01% |
38,100
| – | – |
|
1390
CALL
Avantor
AVTR
$7.81B
| $5.78M | ﹤0.01% |
223,600
+43,200
| +24% | +$1.06M |
|
1391
BioNTech
BNTX
$22.6B
| $5.78M | ﹤0.01% |
48,687
+13,051
| +37% | +$1.2M |
|
1392
CALL
Bloom Energy
BE
$52.6B
| $5.76M | ﹤0.01% |
545,700
-196,800
| -27% | -$2.33M |
|
|
SPR
1393
PUT
DELISTED
Spirit AeroSystems
SPR
| $5.75M | ﹤0.01% |
176,800
-138,800
| -44% | -$4.76M |
|
1394
PUT
Zoetis
ZTS
$31.6B
| $5.74M | ﹤0.01% |
29,400
-25,300
| -46% | -$4.66M |
|
1395
PUT
Burlington
BURL
$22B
| $5.74M | ﹤0.01% |
21,800
-72,400
| -77% | -$18.7M |
|
1396
CALL
DigitalBridge
DBRG
$2.94B
| $5.74M | ﹤0.01% |
406,200
+141,800
| +54% | +$1.88M |
|
1397
CALL
AES
AES
$10.6B
| $5.74M | ﹤0.01% |
285,900
-165,800
| -37% | -$2.93M |
|
1398
CALL
Universal Display
OLED
$3.71B
| $5.73M | ﹤0.01% |
27,300
| – | – |
|
1399
Clorox
CLX
$11.6B
| $5.72M | ﹤0.01% |
35,124
+14,436
| +70% | +$2.14M |
|
1400
PUT
Bank of Montreal
BMO
$125B
| $5.71M | ﹤0.01% |
63,300
-47,800
| -43% | -$4.08M |
|
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.