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 | |
|---|---|---|---|---|---|---|
676
CALL
KE Holdings
BEKE
$17.8B
| $18.6M | 0.01% |
936,500
-146,000
| -13% | -$2.15M |
|
677
PUT
GE Vernova
GEV
$275B
| $18.5M | 0.01% |
125,000
+10,500
| +9% | +$2.02M |
|
678
VanEck Gold Miners ETF
GDX
$22.8B
| $18.4M | 0.01% |
+463,105
| New | +$17.5M |
|
679
CALL
Cummins
CMI
$91.8B
| $18.4M | 0.01% |
56,700
-16,300
| -22% | -$4.83M |
|
680
CALL
Sunrun
RUN
$2.46B
| $18.3M | 0.01% |
1,015,400
-16,100
| -2% | -$286K |
|
681
PUT
Zillow
Z
$6.78B
| $18.3M | 0.01% |
287,500
-290,400
| -50% | -$15.6M |
|
682
CALL
MetLife
MET
$59.5B
| $18.2M | 0.01% |
221,200
-23,400
| -10% | -$1.75M |
|
683
PUT
International Paper
IP
$19.9B
| $18.2M | 0.01% |
373,300
-482,200
| -56% | -$22.5M |
|
684
PUT
Stryker
SYK
$121B
| $18.2M | 0.01% |
50,400
-6,900
| -12% | -$2.38M |
|
685
Visa
V
$667B
| $18.2M | 0.01% |
+66,210
| New | +$17.9M |
|
686
PUT
BP
BP
$114B
| $18.2M | 0.01% |
578,800
-191,600
| -25% | -$6.48M |
|
687
Bristol-Myers Squibb
BMY
$126B
| $18.2M | 0.01% |
351,086
-206,925
| -37% | -$9.71M |
|
688
PUT
AGNC Investment
AGNC
$12.2B
| $18.1M | 0.01% |
1,732,100
-180,800
| -9% | -$1.84M |
|
689
Walt Disney
DIS
$162B
| $18.1M | 0.01% |
188,224
+128,708
| +216% | +$11.8M |
|
|
690
Citigroup
C
$220B
| $18.1M | 0.01% |
288,926
-924,321
| -76% | -$57.2M |
|
|
691
CALL
International Paper
IP
$19.9B
| $18.1M | 0.01% |
369,500
-6,400
| -2% | -$298K |
|
692
PUT
Chewy
CHWY
$8.36B
| $18M | 0.01% |
616,200
-906,800
| -60% | -$24.2M |
|
693
CALL
UBS Group
UBS
$169B
| $18M | 0.01% |
583,500
-26,800
| -4% | -$805K |
|
694
PUT
United States Oil Fund
USO
$2.55B
| $18M | 0.01% |
257,900
+134,800
| +110% | +$10.1M |
|
695
CALL
Xtrackers MSCI Emerging Markets Hedged Equity ETF
DBEM
$107M
| $18M | 0.01% |
629,800
+220,100
| +54% | +$5.51M |
|
696
CALL
Clorox
CLX
$11.3B
| $18M | 0.01% |
110,400
+15,600
| +16% | +$2.31M |
|
697
PUT
Futu Holdings
FUTU
$13.8B
| $17.9M | 0.01% |
187,100
+20,200
| +12% | +$1.29M |
|
698
PUT
Novartis
NVS
$297B
| $17.9M | 0.01% |
167,600
-117,400
| -41% | -$13.3M |
|
699
CALL
EQT Corp
EQT
$33.6B
| $17.9M | 0.01% |
488,000
+58,400
| +14% | +$1.99M |
|
|
MRO
700
PUT
DELISTED
Marathon Oil Corporation
MRO
| $17.9M | 0.01% |
670,700
-207,400
| -24% | -$5.74M |
|
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.