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 | |
|---|---|---|---|---|---|---|
5576
Annovis Bio
ANVS
$74.4M
| $69K | ﹤0.01% |
+8,605
| New | +$80.6K |
|
5577
CALL
Atmos Energy
ATO
$28.8B
| $69K | ﹤0.01% |
500
-3,600
| -88% | -$463K |
|
5578
Extreme Networks
EXTR
$3.94B
| $69K | ﹤0.01% |
4,632
-13,238
| -74% | -$188K |
|
5579
PUT
Inter&Co
INTR
$2.47B
| $69K | ﹤0.01% |
10,500
+200
| +2% | +$1.38K |
|
5580
CALL
Monro
MNRO
$383M
| $69K | ﹤0.01% |
2,400
+500
| +26% | +$12.9K |
|
5581
CALL
Microvision
MVIS
$6.21M
| $69K | ﹤0.01% |
60,900
+2,100
| +4% | +$2.18K |
|
5582
CALL
Red Cat Holdings
RCAT
$1.15B
| $69K | ﹤0.01% |
+27,300
| New | +$65K |
|
5583
CALL
Regenxbio
RGNX
$620M
| $69K | ﹤0.01% |
6,600
-8,800
| -57% | -$107K |
|
|
RWT
5584
PUT
Redwood Trust
RWT
$574M
| $69K | ﹤0.01% |
9,000
-7,900
| -47% | -$57.6K |
|
5585
CALL
Saic
SAIC
$4.95B
| $69K | ﹤0.01% |
500
-6,800
| -93% | -$859K |
|
|
SOL
5586
CALL
DELISTED
Emeren Group
SOL
| $69K | ﹤0.01% |
+25,700
| New | +$47.9K |
|
5587
CALL
TriplePoint Venture Growth BDC
TPVG
$184M
| $69K | ﹤0.01% |
9,900
+1,700
| +21% | +$13.3K |
|
5588
CALL
Mammoth Energy Services
TUSK
$128M
| $69K | ﹤0.01% |
17,000
+2,800
| +20% | +$10.2K |
|
5589
CALL
Vishay Intertechnology
VSH
$5.25B
| $69K | ﹤0.01% |
3,700
-400
| -10% | -$8.33K |
|
5590
VistaGen Therapeutics
VTGN
$9.89M
| $69K | ﹤0.01% |
23,000
+5,893
| +34% | +$20.1K |
|
|
BCOV
5591
CALL
DELISTED
Brightcove, Inc.
BCOV
| $69K | ﹤0.01% |
+32,100
| New | +$71.7K |
|
|
RCM
5592
CALL
DELISTED
R1 RCM Inc. Common Stock
RCM
| $69K | ﹤0.01% |
4,900
| – | – |
|
|
AISP
5593
Airship AI Holdings
AISP
$60.3M
| $68K | ﹤0.01% |
+29,778
| New | +$96.5K |
|
5594
CALL
AerSale
ASLE
$293M
| $68K | ﹤0.01% |
13,500
-200
| -1% | -$1.16K |
|
5595
CALL
Cognex
CGNX
$10.9B
| $68K | ﹤0.01% |
1,700
-600
| -26% | -$25.6K |
|
|
CHX
5596
DELISTED
ChampionX
CHX
| $68K | ﹤0.01% |
2,279
-5,893
| -72% | -$186K |
|
5597
CALL
FirstCash
FCFS
$8.85B
| $68K | ﹤0.01% |
600
-2,000
| -77% | -$226K |
|
5598
Global Net Lease
GNL
$1.84B
| $68K | ﹤0.01% |
8,096
+3,132
| +63% | +$26.3K |
|
5599
CALL
Harmony Biosciences
HRMY
$2.04B
| $68K | ﹤0.01% |
1,700
+1,300
| +325% | +$45.7K |
|
5600
Hyliion Holdings
HYLN
$635M
| $68K | ﹤0.01% |
27,495
+12,078
| +78% | +$24.3K |
|
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.