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 | |
|---|---|---|---|---|---|---|
|
MTTR
4601
PUT
DELISTED
Matterport, Inc. Class A Common Stock
MTTR
| $183K | ﹤0.01% |
40,700
-19,900
| -33% | -$86.8K |
|
4602
Allot
ALLT
$362M
| $182K | ﹤0.01% |
61,508
+36,250
| +144% | +$109K |
|
4603
PUT
Coty
COTY
$2.4B
| $182K | ﹤0.01% |
19,400
+3,000
| +18% | +$28.6K |
|
4604
CALL
Seres Therapeutics
MCRB
$45M
| $182K | ﹤0.01% |
9,630
-4,045
| -30% | -$82.1K |
|
|
ORGN
4605
CALL
DELISTED
Origin Materials
ORGN
| $182K | ﹤0.01% |
3,940
+763
| +24% | +$27.6K |
|
4606
UFP Technologies
UFPT
$1.97B
| $182K | ﹤0.01% |
575
-629
| -52% | -$201K |
|
|
KNGS
4607
PUT
DELISTED
Roundhill S&P Dividend Monarchs ETF
KNGS
| $182K | ﹤0.01% |
4,200
+3,500
| +500% | +$100K |
|
4608
PUT
AdaptHealth
AHCO
$1.47B
| $181K | ﹤0.01% |
16,200
+300
| +2% | +$3.19K |
|
|
CVSA
4609
PUT
Covista Inc
CVSA
$4.55B
| $181K | ﹤0.01% |
2,400
-8,500
| -78% | -$627K |
|
4610
PUT
CDW
CDW
$18.9B
| $181K | ﹤0.01% |
800
-1,500
| -65% | -$333K |
|
4611
CALL
Gulfport Energy Corp
GPOR
$2.82B
| $181K | ﹤0.01% |
1,200
-1,000
| -45% | -$147K |
|
4612
PUT
Andersons Inc
ANDE
$2.39B
| $180K | ﹤0.01% |
3,600
+3,300
| +1,100% | +$163K |
|
4613
ChargePoint
CHPT
$134M
| $180K | ﹤0.01% |
6,588
-8,830
| -57% | -$307K |
|
4614
PUT
ESAB
ESAB
$5.37B
| $180K | ﹤0.01% |
1,700
+300
| +21% | +$29.7K |
|
4615
GoodRx Holdings
GDRX
$1.09B
| $180K | ﹤0.01% |
26,068
+23,274
| +833% | +$183K |
|
4616
PUT
Sylvamo
SLVM
$1.52B
| $180K | ﹤0.01% |
2,100
-200
| -9% | -$14.9K |
|
4617
TETRA Technologies
TTI
$1.08B
| $180K | ﹤0.01% |
58,068
-127,942
| -69% | -$413K |
|
4618
CALL
Carlisle Companies
CSL
$13.5B
| $179K | ﹤0.01% |
400
-400
| -50% | -$165K |
|
4619
CALL
Jacobs Solutions
J
$16B
| $179K | ﹤0.01% |
12,625
+414
| +3% | +$49.9K |
|
4620
Jefferies Financial Group
JEF
$12.7B
| $179K | ﹤0.01% |
2,909
-21,364
| -88% | -$1.21M |
|
4621
CALL
Leslie's
LESL
$8.33M
| $179K | ﹤0.01% |
2,840
+1,300
| +84% | +$80.2K |
|
4622
PUT
Morgan Stanley Direct Lending Fund
MSDL
$1.25B
| $179K | ﹤0.01% |
+9,100
| New | +$189K |
|
4623
GraniteShares ETF Trust GraniteShares 2x Long NVDA Daily ETF
NVDL
$3B
| $179K | ﹤0.01% |
9,276
-311,022
| -97% | -$6.16M |
|
4624
CALL
Arq
ARQ
$83.3M
| $179K | ﹤0.01% |
30,600
+25,600
| +512% | +$156K |
|
4625
Blend Labs
BLND
$438M
| $178K | ﹤0.01% |
47,630
+44,875
| +1,629% | +$149K |
|
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.