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 | |
|---|---|---|---|---|---|---|
976
Vistra
VST
$57B
| $11.1M | 0.01% |
+93,922
| New | +$7.97M |
|
977
CALL
Diamondback Energy
FANG
$57.8B
| $11.1M | 0.01% |
64,400
-52,100
| -45% | -$10M |
|
978
CALL
Canadian Imperial Bank of Commerce
CM
$106B
| $11.1M | 0.01% |
180,500
+67,300
| +59% | +$3.64M |
|
979
CALL
Ally Financial
ALLY
$13.4B
| $11.1M | 0.01% |
310,900
+81,300
| +35% | +$3.25M |
|
980
CALL
Toyota
TM
$209B
| $11.1M | 0.01% |
61,900
+44,800
| +262% | +$8.37M |
|
981
iShares National Muni Bond ETF
MUB
$45B
| $11M | 0.01% |
101,353
+98,770
| +3,824% | +$10.6M |
|
982
CALL
Emerson Electric
EMR
$81.2B
| $11M | 0.01% |
100,500
-55,800
| -36% | -$6M |
|
983
PUT
GoDaddy
GDDY
$11.6B
| $10.9M | 0.01% |
69,800
-36,400
| -34% | -$5.56M |
|
984
CALL
Mobileye
MBLY
$6.29B
| $10.9M | 0.01% |
794,700
+198,100
| +33% | +$3.47M |
|
985
CALL
Baker Hughes
BKR
$55.6B
| $10.8M | 0.01% |
299,300
-68,200
| -19% | -$2.4M |
|
986
CALL
Align Technology
ALGN
$12B
| $10.8M | 0.01% |
42,500
-7,700
| -15% | -$1.82M |
|
987
CALL
Amplify Online Retail ETF
IBUY
$106M
| $10.8M | 0.01% |
791,700
+23,200
| +3% | +$1.29M |
|
988
PUT
ZIM Integrated Shipping Services
ZIM
$3.08B
| $10.8M | 0.01% |
421,100
-146,500
| -26% | -$2.85M |
|
989
PUT
Coupang
CPNG
$28.1B
| $10.8M | 0.01% |
440,000
-81,100
| -16% | -$1.8M |
|
990
PUT
Thor Industries
THO
$3.9B
| $10.8M | 0.01% |
98,200
+58,800
| +149% | +$5.97M |
|
991
PUT
Insulet
PODD
$11B
| $10.8M | 0.01% |
46,200
-2,000
| -4% | -$411K |
|
|
MRSH
992
CALL
Marsh
MRSH
$84.2B
| $10.8M | 0.01% |
48,200
-3,600
| -7% | -$799K |
|
993
CALL
Watsco Inc
WSO
$14.8B
| $10.7M | 0.01% |
21,800
+13,300
| +156% | +$6.39M |
|
994
CALL
CRH
CRH
$65.5B
| $10.7M | 0.01% |
115,600
-128,800
| -53% | -$10.8M |
|
|
FITB
995
CALL
Fifth Third Bancorp
FITB
$51.8B
| $10.7M | 0.01% |
250,000
+59,200
| +31% | +$2.41M |
|
996
CALL
Yum China
YUMC
$14.8B
| $10.7M | 0.01% |
237,800
+150,100
| +171% | +$5M |
|
997
CALL
Novartis
NVS
$297B
| $10.7M | 0.01% |
96,800
-31,700
| -25% | -$3.6M |
|
998
PUT
Globe Life
GL
$13.3B
| $10.6M | 0.01% |
100,500
-24,200
| -19% | -$2.32M |
|
999
CALL
Starwood Property Trust
STWD
$6.05B
| $10.6M | 0.01% |
521,400
+51,700
| +11% | +$1.03M |
|
1000
CALL
Sony
SONY
$122B
| $10.6M | 0.01% |
550,000
-148,000
| -21% | -$2.7M |
|
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.