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 | |
|---|---|---|---|---|---|---|
6376
Hain Celestial
HAIN
$44.6M
| $29K | ﹤0.01% |
3,458
+1,593
| +85% | +$11.9K |
|
|
HSAI
6377
PUT
Hesai Group
HSAI
$2.57B
| $29K | ﹤0.01% |
6,300
-900
| -13% | -$3.79K |
|
6378
CALL
inTEST
INTT
$143M
| $29K | ﹤0.01% |
4,100
+500
| +14% | +$4.15K |
|
6379
CALL
IPG Photonics
IPGP
$3.4B
| $29K | ﹤0.01% |
400
+300
| +300% | +$22.4K |
|
6380
PUT
Ituran Location and Control
ITRN
$1.08B
| $29K | ﹤0.01% |
1,100
-300
| -21% | -$7.99K |
|
6381
CALL
Kiniksa Pharmaceuticals
KNSA
$6.31B
| $29K | ﹤0.01% |
1,200
+100
| +9% | +$2.44K |
|
6382
CALL
Kite Realty
KRG
$5.86B
| $29K | ﹤0.01% |
1,100
+300
| +38% | +$7.45K |
|
6383
CALL
Lifecore Biomedical
LFCR
$162M
| $29K | ﹤0.01% |
5,900
-6,500
| -52% | -$34K |
|
6384
Loop Industries
LOOP
$34.8M
| $29K | ﹤0.01% |
16,130
+9,075
| +129% | +$15.3K |
|
6385
PUT
NNN REIT
NNN
$9.29B
| $29K | ﹤0.01% |
600
-5,400
| -90% | -$250K |
|
6386
CALL
OmniAb
OABI
$283M
| $29K | ﹤0.01% |
7,000
-6,200
| -47% | -$26.8K |
|
|
ORC
6387
CALL
Orchid Island Capital
ORC
$1.31B
| $29K | ﹤0.01% |
3,600
| – | – |
|
6388
CALL
Pangaea Logistics
PANL
$484M
| $29K | ﹤0.01% |
4,100
-1,200
| -23% | -$8.28K |
|
6389
CALL
Relay Therapeutics
RLAY
$4B
| $29K | ﹤0.01% |
4,200
+3,900
| +1,300% | +$29.1K |
|
|
6390
PUT
Relay Therapeutics
RLAY
$4B
| $29K | ﹤0.01% |
+4,200
| New | +$31.4K |
|
6391
CALL
Rackspace Technology
RXT
$960M
| $29K | ﹤0.01% |
12,100
-31,400
| -72% | -$75.8K |
|
6392
UNIFI
UFI
$114M
| $29K | ﹤0.01% |
3,953
-6,504
| -62% | -$40.9K |
|
6393
CALL
Verrica Pharmaceuticals
VRCA
$89M
| $29K | ﹤0.01% |
2,040
| – | – |
|
6394
CALL
West Fraser Timber
WFG
$5.21B
| $29K | ﹤0.01% |
300
-1,600
| -84% | -$137K |
|
|
EVA
6395
CALL
DELISTED
Enviva Inc.
EVA
| $29K | ﹤0.01% |
309,900
+31,300
| +11% | +$13.6K |
|
6396
GraniteShares 2x Long AAPL Daily ETF
AAPB
$20.1M
| $28K | ﹤0.01% |
949
+500
| +111% | +$14K |
|
6397
PUT
Alkami Technology
ALKT
$1.96B
| $28K | ﹤0.01% |
900
-3,500
| -80% | -$110K |
|
6398
CALL
Blue Ridge Bankshares
BRBS
$312M
| $28K | ﹤0.01% |
10,300
-200
| -2% | -$546 |
|
6399
PUT
Cemex
CX
$16.9B
| $28K | ﹤0.01% |
4,700
-13,700
| -74% | -$86K |
|
|
DRRX
6400
PUT
DELISTED
DURECT Corp
DRRX
| $28K | ﹤0.01% |
20,900
-5,800
| -22% | -$8.25K |
|
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.