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 | |
|---|---|---|---|---|---|---|
4451
CALL
Sonos
SONO
$2.09B
| $215K | ﹤0.01% |
17,500
+9,000
| +106% | +$114K |
|
4452
CALL
STAAR Surgical
STAA
$1.19B
| $215K | ﹤0.01% |
5,800
-3,900
| -40% | -$145K |
|
4453
PUT
Wrap Technologies
WRAP
$90.9M
| $215K | ﹤0.01% |
143,600
-4,200
| -3% | -$6.8K |
|
4454
PUT
Assured Guaranty
AGO
$3.73B
| $214K | ﹤0.01% |
2,700
-4,000
| -60% | -$315K |
|
4455
HighPeak Energy
HPK
$838M
| $214K | ﹤0.01% |
15,454
-14,241
| -48% | -$217K |
|
|
WCN
4456
PUT
Waste Connections
WCN
$43.6B
| $214K | ﹤0.01% |
1,200
+700
| +140% | +$127K |
|
4457
Revolve Group
RVLV
$1.85B
| $213K | ﹤0.01% |
+8,622
| New | +$181K |
|
|
STKL
4458
DELISTED
SunOpta
STKL
| $213K | ﹤0.01% |
33,517
-59,831
| -64% | -$351K |
|
|
TPIC
4459
CALL
DELISTED
TPI Composites
TPIC
| $213K | ﹤0.01% |
47,000
+44,100
| +1,521% | +$180K |
|
4460
PUT
BellRing Brands
BRBR
$1.55B
| $212K | ﹤0.01% |
3,500
+2,500
| +250% | +$139K |
|
4461
PUT
Coca-Cola Europacific Partners
CCEP
$49.1B
| $212K | ﹤0.01% |
2,700
+1,800
| +200% | +$138K |
|
4462
CALL
Denali Therapeutics
DNLI
$3.79B
| $212K | ﹤0.01% |
7,300
+6,900
| +1,725% | +$171K |
|
4463
MicroSectors FANG+ ETNs due Jan 8 2038
FNGS
$532M
| $212K | ﹤0.01% |
4,300
-14,501
| -77% | -$702K |
|
|
LAND
4464
CALL
Gladstone Land Corp
LAND
$365M
| $212K | ﹤0.01% |
15,300
+8,200
| +115% | +$115K |
|
4465
Magnolia Oil & Gas
MGY
$5.93B
| $212K | ﹤0.01% |
8,692
+4,914
| +130% | +$124K |
|
|
PSTL
4466
CALL
Postal Realty Trust
PSTL
$703M
| $212K | ﹤0.01% |
14,500
-1,200
| -8% | -$17.2K |
|
4467
CALL
Skywest
SKYW
$4.35B
| $212K | ﹤0.01% |
2,500
-2,200
| -47% | -$173K |
|
4468
CALL
Twist Bioscience
TWST
$5.32B
| $212K | ﹤0.01% |
4,700
+2,100
| +81% | +$99.9K |
|
4469
W&T Offshore
WTI
$525M
| $211K | ﹤0.01% |
98,386
+52,845
| +116% | +$117K |
|
4470
PUT
Brookfield Infrastructure Partners
BIP
$19.6B
| $210K | ﹤0.01% |
6,000
-19,400
| -76% | -$609K |
|
4471
CALL
Heritage Insurance Holdings
HRTG
$903M
| $210K | ﹤0.01% |
17,200
-7,600
| -31% | -$88.1K |
|
4472
PUT
Itaú Unibanco
ITUB
$89.8B
| $210K | ﹤0.01% |
35,916
-331,063
| -90% | -$1.86M |
|
4473
LifeMD
LFMD
$176M
| $210K | ﹤0.01% |
40,141
+3,502
| +10% | +$20.2K |
|
4474
PUT
Napco Security Technologies
NSSC
$1.3B
| $210K | ﹤0.01% |
5,200
+4,900
| +1,633% | +$240K |
|
4475
PUT
Omeros
OMER
$845M
| $210K | ﹤0.01% |
53,000
-17,500
| -25% | -$74.7K |
|
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.