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 | |
|---|---|---|---|---|---|---|
701
CALL
J.M. Smucker
SJM
$12.3B
| $17.8M | 0.01% |
147,100
-2,000
| -1% | -$236K |
|
702
CALL
Cognizant
CTSH
$20.2B
| $17.8M | 0.01% |
230,700
+5,800
| +3% | +$432K |
|
703
PUT
Vale
VALE
$63B
| $17.8M | 0.01% |
1,524,200
-304,900
| -17% | -$3.27M |
|
704
CALL
Lyft
LYFT
$5.33B
| $17.8M | 0.01% |
1,394,300
+292,300
| +27% | +$3.49M |
|
705
CALL
Phillips 66
PSX
$83.6B
| $17.8M | 0.01% |
135,100
-61,900
| -31% | -$8.36M |
|
706
CALL
Trip.com Group
TCOM
$27B
| $17.7M | 0.01% |
298,500
+85,300
| +40% | +$3.95M |
|
707
PUT
Colgate-Palmolive
CL
$71.4B
| $17.7M | 0.01% |
170,700
-119,900
| -41% | -$12.2M |
|
708
CALL
VanEck Durable High Dividend ETF
DURA
$38.3M
| $17.7M | 0.01% |
86,300
-25,100
| -23% | -$837K |
|
709
Nike
NKE
$60.7B
| $17.6M | 0.01% |
199,564
+195,749
| +5,131% | +$15.4M |
|
710
CALL
Abercrombie & Fitch
ANF
$4.03B
| $17.6M | 0.01% |
125,800
+30,100
| +31% | +$4.58M |
|
711
iShares 7-10 Year Treasury Bond ETF
IEF
$47B
| $17.6M | 0.01% |
+179,259
| New | +$17.3M |
|
712
CALL
Skyworks Solutions
SWKS
$9.02B
| $17.6M | 0.01% |
177,900
+73,300
| +70% | +$7.77M |
|
|
BNY
713
CALL
Bank of New York Mellon
BNY
$109B
| $17.5M | 0.01% |
243,500
+63,200
| +35% | +$4.16M |
|
714
PUT
British American Tobacco
BTI
$128B
| $17.5M | 0.01% |
478,300
+8,800
| +2% | +$314K |
|
715
PUT
Jabil
JBL
$33.6B
| $17.5M | 0.01% |
145,900
+47,200
| +48% | +$5.13M |
|
716
PUT
Simon Property Group
SPG
$73.1B
| $17.4M | 0.01% |
103,000
-9,100
| -8% | -$1.44M |
|
717
CALL
APA Corp
APA
$12.9B
| $17.4M | 0.01% |
711,400
+60,800
| +9% | +$1.71M |
|
718
CALL
iShares Core MSCI Emerging Markets ETF
IEMG
$152B
| $17.4M | 0.01% |
284,800
-102,100
| -26% | -$5.53M |
|
719
PUT
Domino's
DPZ
$10.6B
| $17.3M | 0.01% |
40,200
+16,700
| +71% | +$7.26M |
|
720
CALL
Twilio
TWLO
$27.9B
| $17.3M | 0.01% |
265,000
+40,900
| +18% | +$2.45M |
|
721
PUT
Ally Financial
ALLY
$13.3B
| $17.3M | 0.01% |
485,200
+51,500
| +12% | +$2.06M |
|
722
PUT
Cogent Communications
CCOI
$649M
| $17.3M | 0.01% |
227,400
+124,700
| +121% | +$8.59M |
|
723
CALL
ZIM Integrated Shipping Services
ZIM
$3.08B
| $17.2M | 0.01% |
671,800
+18,800
| +3% | +$365K |
|
724
CALL
Quanta Services
PWR
$97.2B
| $17.2M | 0.01% |
57,800
+6,400
| +12% | +$1.69M |
|
|
X
725
DELISTED
US Steel
X
| $17.2M | 0.01% |
+487,266
| New | +$18.6M |
|
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.