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 | |
|---|---|---|---|---|---|---|
4676
Alto Ingredients
ALTO
$338M
| $171K | ﹤0.01% |
106,528
+49,667
| +87% | +$74.7K |
|
4677
CALL
Phathom Pharmaceuticals
PHAT
$928M
| $171K | ﹤0.01% |
9,500
-23,900
| -72% | -$334K |
|
|
RVPH
4678
CALL
DELISTED
REVIVA PHARMA HLDGS INC
RVPH
| $171K | ﹤0.01% |
5,970
+2,810
| +89% | +$62.4K |
|
|
VOXX
4679
CALL
DELISTED
VOXX International Corporation Class A
VOXX
| $171K | ﹤0.01% |
27,000
+25,600
| +1,829% | +$98.9K |
|
4680
CALL
ACV Auctions
ACVA
$1.41B
| $170K | ﹤0.01% |
8,400
-14,000
| -63% | -$258K |
|
4681
PUT
Antero Midstream
AM
$10.2B
| $170K | ﹤0.01% |
11,300
-13,600
| -55% | -$198K |
|
|
AZUL
4682
DELISTED
Azul
AZUL
| $170K | ﹤0.01% |
+49,546
| New | +$186K |
|
|
BLUE
4683
PUT
DELISTED
bluebird bio
BLUE
| $170K | ﹤0.01% |
16,350
+8,565
| +110% | +$142K |
|
4684
Ceragon Networks
CRNT
$188M
| $170K | ﹤0.01% |
62,113
-9,940
| -14% | -$27.2K |
|
4685
Health Catalyst
HCAT
$160M
| $170K | ﹤0.01% |
20,937
+19,847
| +1,821% | +$143K |
|
4686
CALL
Mueller Industries
MLI
$14.5B
| $170K | ﹤0.01% |
4,600
-200
| -4% | -$6.7K |
|
4687
CALL
NETGEAR
NTGR
$612M
| $170K | ﹤0.01% |
8,500
-13,000
| -60% | -$215K |
|
|
BMTX
4688
CALL
DELISTED
BM Technologies, Inc.
BMTX
| $170K | ﹤0.01% |
50,200
-20,400
| -29% | -$58.1K |
|
|
BORR
4689
CALL
Borr Drilling
BORR
$1.19B
| $169K | ﹤0.01% |
30,800
+4,100
| +15% | +$25.1K |
|
4690
PUT
Inovio Pharmaceuticals
INO
$85.6M
| $169K | ﹤0.01% |
29,300
+13,700
| +88% | +$113K |
|
4691
KLX Energy Services
KLXE
$43.1M
| $169K | ﹤0.01% |
31,013
-3,439
| -10% | -$20.8K |
|
|
VRNT
4692
CALL
DELISTED
Verint Systems
VRNT
| $169K | ﹤0.01% |
6,700
+3,100
| +86% | +$95.4K |
|
4693
Wave Life Sciences
WVE
$1.12B
| $169K | ﹤0.01% |
20,645
+8,434
| +69% | +$50.4K |
|
|
SBDS
4694
PUT
DELISTED
Solo Brands Inc
SBDS
| $169K | ﹤0.01% |
3,000
-23
| -0.8% | -$1.64K |
|
4695
Clover Health Investments
CLOV
$2.23B
| $168K | ﹤0.01% |
59,859
+8,308
| +16% | +$19K |
|
4696
CALL
Extreme Networks
EXTR
$3.8B
| $168K | ﹤0.01% |
11,200
-16,000
| -59% | -$227K |
|
4697
CALL
Humacyte
HUMA
$168M
| $168K | ﹤0.01% |
30,900
-37,500
| -55% | -$247K |
|
4698
PUT
Planet Labs
PL
$6.94B
| $168K | ﹤0.01% |
75,700
+67,700
| +846% | +$150K |
|
4699
CALL
Atlanta Braves Holdings Series B
BATRK
$3.28B
| $167K | ﹤0.01% |
+4,100
| New | +$171K |
|
4700
PUT
Green Brick Partners
GRBK
$3.09B
| $167K | ﹤0.01% |
2,000
-900
| -31% | -$65K |
|
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.