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 | |
|---|---|---|---|---|---|---|
|
SNBR
4651
CALL
DELISTED
Sleep Number
SNBR
| $175K | ﹤0.01% |
9,600
-100
| -1% | -$1.31K |
|
4652
PUT
Syndax Pharmaceuticals
SNDX
$1.7B
| $175K | ﹤0.01% |
9,100
+2,000
| +28% | +$41.3K |
|
4653
CALL
Tyler Technologies
TYL
$13.7B
| $175K | ﹤0.01% |
300
-2,100
| -88% | -$1.18M |
|
4654
CALL
Abeona Therapeutics
ABEO
$355M
| $174K | ﹤0.01% |
27,600
+1,600
| +6% | +$8.35K |
|
4655
CALL
Provident Financial Services
PFS
$3.14B
| $174K | ﹤0.01% |
9,400
+1,100
| +13% | +$19.4K |
|
4656
CALL
POSCO
PKX
$14.7B
| $174K | ﹤0.01% |
2,500
+700
| +39% | +$45.8K |
|
4657
Targa Resources
TRGP
$56.8B
| $174K | ﹤0.01% |
+1,178
| New | +$166K |
|
4658
State Street SPDR Bloomberg 1-3 Month T-Bill ETF
BIL
$47.1B
| $173K | ﹤0.01% |
+1,885
| New | +$173K |
|
4659
CALL
Granite Ridge Resources
GRNT
$621M
| $173K | ﹤0.01% |
29,200
+14,200
| +95% | +$91K |
|
4660
PIMCO 15+ Year US TIPS Index Exchange-Traded Fund
LTPZ
$693M
| $173K | ﹤0.01% |
+2,998
| New | +$169K |
|
4661
CALL
NewtekOne
NEWT
$426M
| $173K | ﹤0.01% |
13,900
+8,300
| +148% | +$105K |
|
4662
Direxion Daily NVDA Bull 2X ETF
NVDU
$495M
| $173K | ﹤0.01% |
1,853
-1,693
| -48% | -$161K |
|
4663
CALL
WPP
WPP
$4.67B
| $173K | ﹤0.01% |
3,400
+3,300
| +3,300% | +$157K |
|
|
CTLT
4664
DELISTED
CATALENT, INC.
CTLT
| $173K | ﹤0.01% |
+2,860
| New | +$169K |
|
|
PETQ
4665
DELISTED
PetIQ, Inc. Class A Common Stock
PETQ
| $173K | ﹤0.01% |
5,636
+5,581
| +10,147% | +$151K |
|
4666
PUT
Brown-Forman Class B
BF.B
$13.5B
| $172K | ﹤0.01% |
3,500
-1,800
| -34% | -$80.9K |
|
|
ESPR
4667
DELISTED
Esperion Therapeutics
ESPR
| $172K | ﹤0.01% |
104,359
+12,515
| +14% | +$25.3K |
|
4668
CALL
Ethan Allen Interiors
ETD
$600M
| $172K | ﹤0.01% |
5,400
+1,700
| +46% | +$51.3K |
|
4669
CALL
Federal Realty Investment Trust
FRT
$10.9B
| $172K | ﹤0.01% |
1,500
-3,700
| -71% | -$413K |
|
4670
HDFC Bank
HDB
$123B
| $172K | ﹤0.01% |
+5,504
| New | +$169K |
|
4671
Larimar Therapeutics
LRMR
$377M
| $172K | ﹤0.01% |
26,262
+1,708
| +7% | +$13.7K |
|
4672
Oppenheimer Holdings
OPY
$1.18B
| $172K | ﹤0.01% |
+3,373
| New | +$172K |
|
4673
Virco
VIRC
$94.8M
| $172K | ﹤0.01% |
12,458
-5,366
| -30% | -$81.8K |
|
4674
CALL
Zentalis Pharmaceuticals
ZNTL
$332M
| $172K | ﹤0.01% |
46,800
+44,700
| +2,129% | +$162K |
|
|
MRX
4675
CALL
Marex Group Limited Ordinary Shares
MRX
$4.54B
| $172K | ﹤0.01% |
7,300
+5,200
| +248% | +$116K |
|
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.