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 | |
|---|---|---|---|---|---|---|
6551
Heron Therapeutics
HRTX
$93.4M
| $23K | ﹤0.01% |
11,996
-83,635
| -87% | -$200K |
|
6552
Hawkins
HWKN
$2.9B
| $23K | ﹤0.01% |
187
+31
| +20% | +$3.51K |
|
6553
MeiraGTx Holdings
MGTX
$1.08B
| $23K | ﹤0.01% |
5,741
+985
| +21% | +$4.26K |
|
6554
PUT
Newmark Group
NMRK
$2.64B
| $23K | ﹤0.01% |
1,500
-100
| -6% | -$1.3K |
|
6555
NetSol Technologies
NTWK
$52.1M
| $23K | ﹤0.01% |
+8,327
| New | +$22.8K |
|
6556
OptimizeRx
OPRX
$120M
| $23K | ﹤0.01% |
3,085
-24,949
| -89% | -$222K |
|
6557
CALL
Oric Pharmaceuticals
ORIC
$1.17B
| $23K | ﹤0.01% |
2,300
-100
| -4% | -$989 |
|
6558
CALL
Primoris Services
PRIM
$4.06B
| $23K | ﹤0.01% |
400
-26,800
| -99% | -$1.43M |
|
|
6559
Primoris Services
PRIM
$4.06B
| $23K | ﹤0.01% |
403
-23,193
| -98% | -$1.24M |
|
6560
PUT
Quest Resource Holding
QRHC
$27.6M
| $23K | ﹤0.01% |
3,000
| – | – |
|
6561
Quantum-Si Incorporated
QSI
$153M
| $23K | ﹤0.01% |
+26,499
| New | +$25.7K |
|
6562
PUT
Dr. Reddy's Laboratories
RDY
$9.8B
| $23K | ﹤0.01% |
+1,500
| New | +$24.1K |
|
6563
Rigetti Computing
RGTI
$4.39B
| $23K | ﹤0.01% |
30,288
-32,912
| -52% | -$30K |
|
6564
PUT
Red Robin
RRGB
$139M
| $23K | ﹤0.01% |
5,300
-14,700
| -74% | -$71.9K |
|
6565
PUT
Saratoga Investment
SAR
$309M
| $23K | ﹤0.01% |
1,000
-1,000
| -50% | -$23.1K |
|
6566
CALL
Superior Group of Companies
SGC
$199M
| $23K | ﹤0.01% |
1,500
+500
| +50% | +$8.15K |
|
6567
SkinHealth Systems
SKIN
$83.4M
| $23K | ﹤0.01% |
+16,458
| New | +$27K |
|
6568
SiriusPoint
SPNT
$3.03B
| $23K | ﹤0.01% |
1,659
-816
| -33% | -$11.4K |
|
6569
E.W. Scripps
SSP
$270M
| $23K | ﹤0.01% |
+10,578
| New | +$27.1K |
|
6570
Triple Flag Precious Metals
TFPM
$5.93B
| $23K | ﹤0.01% |
1,430
-313
| -18% | -$5K |
|
6571
PUT
Titan Machinery
TITN
$420M
| $23K | ﹤0.01% |
1,700
-2,600
| -60% | -$39K |
|
6572
iPath Series B S&P 500 VIX Mid-Term Futures ETN
VXZ
$31.6M
| $23K | ﹤0.01% |
444
-38
| -8% | -$1.96K |
|
6573
PUT
Werner Enterprises
WERN
$2.2B
| $23K | ﹤0.01% |
600
-6,900
| -92% | -$255K |
|
6574
PUT
Xperi
XPER
$364M
| $23K | ﹤0.01% |
+2,500
| New | +$20.6K |
|
6575
CALL
Astrana Health
ASTH
$1.81B
| $23K | ﹤0.01% |
400
-7,000
| -95% | -$344K |
|
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.