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 | |
|---|---|---|---|---|---|---|
651
Direxion Daily Financial Bull 3x ETF
FAS
$2.34B
| $20M | 0.01% |
153,903
+22,513
| +17% | +$2.66M |
|
652
CALL
Marriott International
MAR
$95.8B
| $20M | 0.01% |
80,300
-16,800
| -17% | -$3.91M |
|
653
CALL
Lamb Weston
LW
$6.79B
| $20M | 0.01% |
308,300
+212,900
| +223% | +$14.1M |
|
654
PUT
Hilton Worldwide
HLT
$72.7B
| $19.9M | 0.01% |
86,500
+23,300
| +37% | +$5.04M |
|
655
PUT
Novavax
NVAX
$1.28B
| $19.9M | 0.01% |
1,575,900
-294,400
| -16% | -$3.8M |
|
656
CALL
Deckers Outdoor
DECK
$13.4B
| $19.9M | 0.01% |
124,800
+88,200
| +241% | +$13.5M |
|
657
CALL
Chubb
CB
$136B
| $19.9M | 0.01% |
69,000
-34,000
| -33% | -$9.32M |
|
658
PUT
Cleveland-Cliffs
CLF
$6.35B
| $19.8M | 0.01% |
1,553,500
+434,200
| +39% | +$5.9M |
|
659
CALL
Welltower
WELL
$174B
| $19.8M | 0.01% |
154,600
+82,700
| +115% | +$9.65M |
|
660
PUT
PNC Financial Services
PNC
$99.3B
| $19.5M | 0.01% |
105,700
-80,400
| -43% | -$14.1M |
|
661
PUT
NXP Semiconductors
NXPI
$69.8B
| $19.5M | 0.01% |
81,300
+43,500
| +115% | +$10.9M |
|
662
PUT
iPath Series B S&P 500 VIX Short-Term Futures ETN
VXX
$164M
| $19.3M | 0.01% |
389,500
+295,750
| +315% | +$14.5M |
|
663
PUT
Centene
CNC
$31.6B
| $19.3M | 0.01% |
256,300
+121,800
| +91% | +$8.93M |
|
664
CALL
Jabil
JBL
$33.6B
| $19.3M | 0.01% |
160,700
+71,800
| +81% | +$7.8M |
|
665
CALL
Dynatrace
DT
$11.8B
| $19.2M | 0.01% |
360,000
+163,300
| +83% | +$7.77M |
|
666
CALL
Kenvue
KVUE
$36.1B
| $19.2M | 0.01% |
828,700
+592,900
| +251% | +$12.3M |
|
667
CALL
Tapestry
TPR
$28.3B
| $19.2M | 0.01% |
408,000
+206,800
| +103% | +$8.53M |
|
668
CALL
Keurig Dr Pepper
KDP
$40.5B
| $19.2M | 0.01% |
511,300
+166,500
| +48% | +$5.85M |
|
669
Constellation Energy
CEG
$99.1B
| $19.1M | 0.01% |
73,453
+36,327
| +98% | +$7.22M |
|
670
PUT
NRG Energy
NRG
$30.1B
| $19M | 0.01% |
208,900
-221,000
| -51% | -$17.6M |
|
671
CALL
Pultegroup
PHM
$23.6B
| $19M | 0.01% |
132,300
+34,500
| +35% | +$4.39M |
|
672
PUT
Trip.com Group
TCOM
$27B
| $18.9M | 0.01% |
317,700
+227,500
| +252% | +$10.5M |
|
673
CALL
ProShares Ether Strategy ETF
EETH
$54.6M
| $18.9M | 0.01% |
527,200
+32,300
| +7% | +$1.85M |
|
674
PUT
Medtronic
MDT
$105B
| $18.7M | 0.01% |
207,400
-89,000
| -30% | -$7.49M |
|
675
PUT
Hershey
HSY
$34.8B
| $18.7M | 0.01% |
97,300
-100,900
| -51% | -$19.6M |
|
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.