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 | |
|---|---|---|---|---|---|---|
926
CALL
Waste Management
WM
$95.3B
| $11.9M | 0.01% |
57,500
-10,500
| -15% | -$2.19M |
|
927
PUT
NetApp
NTAP
$32.3B
| $11.9M | 0.01% |
96,300
-4,600
| -5% | -$574K |
|
928
CALL
Carpenter Technology
CRS
$29.9B
| $11.9M | 0.01% |
74,500
+55,500
| +292% | +$7.52M |
|
929
PUT
Mondelez International
MDLZ
$77.1B
| $11.9M | 0.01% |
161,300
-30,300
| -16% | -$2.13M |
|
930
CALL
Zoetis
ZTS
$31.3B
| $11.8M | 0.01% |
60,500
-33,100
| -35% | -$6.1M |
|
931
CALL
Antero Resources
AR
$10.9B
| $11.8M | 0.01% |
412,000
-4,600
| -1% | -$130K |
|
932
CALL
Wingstop
WING
$3.67B
| $11.8M | 0.01% |
28,300
-18,700
| -40% | -$7.27M |
|
933
PUT
L3Harris
LHX
$55.8B
| $11.8M | 0.01% |
49,500
+11,600
| +31% | +$2.68M |
|
934
PUT
HP
HPQ
$22.4B
| $11.8M | 0.01% |
328,000
-60,600
| -16% | -$2.14M |
|
935
CALL
Transocean
RIG
$5.89B
| $11.7M | 0.01% |
2,762,800
-152,600
| -5% | -$752K |
|
936
CALL
Ciena
CIEN
$57.7B
| $11.7M | 0.01% |
190,500
-31,800
| -14% | -$1.68M |
|
937
CALL
Sweetgreen
SG
$718M
| $11.7M | 0.01% |
330,800
+101,200
| +44% | +$3.07M |
|
938
CALL
Hasbro
HAS
$12.4B
| $11.7M | 0.01% |
162,100
-108,800
| -40% | -$7.06M |
|
939
Pinterest
PINS
$12.3B
| $11.7M | 0.01% |
+362,130
| New | +$12.3M |
|
940
PUT
Valley National Bancorp
VLY
$8.01B
| $11.7M | 0.01% |
1,292,000
+584,800
| +83% | +$4.75M |
|
941
Valero Energy
VLO
$90.6B
| $11.7M | 0.01% |
86,473
-11,197
| -11% | -$1.63M |
|
942
PUT
Hewlett Packard
HPE
$63.1B
| $11.7M | 0.01% |
569,700
-509,400
| -47% | -$9.73M |
|
|
CYBR
943
CALL
DELISTED
CyberArk
CYBR
| $11.6M | 0.01% |
39,900
-40,600
| -50% | -$11M |
|
944
CALL
VeriSign
VRSN
$23.8B
| $11.6M | 0.01% |
61,100
+53,300
| +683% | +$9.61M |
|
945
PUT
Williams-Sonoma
WSM
$25.7B
| $11.6M | 0.01% |
74,900
-102,300
| -58% | -$14.7M |
|
946
Carnival Corporation Ltd
CCL
$34.6B
| $11.6M | 0.01% |
627,189
-321,128
| -34% | -$5.44M |
|
947
PUT
Kohl's
KSS
$2.06B
| $11.6M | 0.01% |
549,000
-65,100
| -11% | -$1.33M |
|
948
PUT
Franco-Nevada
FNV
$41.3B
| $11.6M | 0.01% |
93,200
+1,500
| +2% | +$186K |
|
949
CALL
Unilever
UL
$130B
| $11.5M | 0.01% |
157,511
+2,844
| +2% | +$197K |
|
950
PUT
MasTec
MTZ
$28.4B
| $11.5M | 0.01% |
93,500
+6,100
| +7% | +$666K |
|
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.