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 | |
|---|---|---|---|---|---|---|
|
SLNO
2676
CALL
DELISTED
Soleno Therapeutics
SLNO
| $1.3M | ﹤0.01% |
25,700
+15,500
| +152% | +$742K |
|
2677
PUT
PureCycle Technologies
PCT
$1.17B
| $1.3M | ﹤0.01% |
136,500
-800
| -0.6% | -$5.36K |
|
2678
Timken Company
TKR
$9.82B
| $1.3M | ﹤0.01% |
+15,379
| New | +$1.26M |
|
2679
CALL
Coty
COTY
$2.33B
| $1.29M | ﹤0.01% |
137,800
+4,100
| +3% | +$39.1K |
|
|
TDAY
2680
USA Today Co
TDAY
$1.23B
| $1.29M | ﹤0.01% |
229,867
+28,661
| +14% | +$139K |
|
2681
CALL
Bumble
BMBL
$367M
| $1.29M | ﹤0.01% |
202,200
-29,100
| -13% | -$219K |
|
2682
PUT
NETGEAR
NTGR
$669M
| $1.29M | ﹤0.01% |
64,300
+19,800
| +44% | +$327K |
|
2683
PUT
Quest Diagnostics
DGX
$25.1B
| $1.29M | ﹤0.01% |
8,300
-15,800
| -66% | -$2.36M |
|
2684
PUT
Comfort Systems
FIX
$61B
| $1.29M | ﹤0.01% |
3,300
+2,200
| +200% | +$725K |
|
2685
Kimberly-Clark
KMB
$36.4B
| $1.29M | ﹤0.01% |
+9,059
| New | +$1.28M |
|
2686
CALL
Praxis Precision Medicines
PRAX
$9.07B
| $1.29M | ﹤0.01% |
22,400
+20,800
| +1,300% | +$1.12M |
|
|
ACLX
2687
PUT
DELISTED
Arcellx
ACLX
| $1.29M | ﹤0.01% |
+15,400
| New | +$1.03M |
|
2688
CALL
First Financial Bancorp
FFBC
$3.55B
| $1.29M | ﹤0.01% |
51,000
+44,800
| +723% | +$1.12M |
|
|
GPGI
2689
PUT
GPGI Inc
GPGI
$4.06B
| $1.28M | ﹤0.01% |
110,407
-71,397
| -39% | -$605K |
|
2690
DigitalOcean
DOCN
$14.4B
| $1.28M | ﹤0.01% |
+31,836
| New | +$1.14M |
|
2691
CALL
AvalonBay Communities
AVB
$27.1B
| $1.28M | ﹤0.01% |
5,700
-300
| -5% | -$64.8K |
|
|
JBTM
2692
CALL
JBT Marel
JBTM
$7.14B
| $1.28M | ﹤0.01% |
13,000
+12,600
| +3,150% | +$1.16M |
|
2693
B2Gold
BTG
$5.16B
| $1.28M | ﹤0.01% |
414,717
-308,922
| -43% | -$897K |
|
2694
JD.com
JD
$40.8B
| $1.27M | ﹤0.01% |
31,863
-552,060
| -95% | -$15.2M |
|
2695
CALL
Vaalco Energy
EGY
$594M
| $1.27M | ﹤0.01% |
221,900
-50,300
| -18% | -$317K |
|
2696
CALL
American Water Works
AWK
$26.3B
| $1.27M | ﹤0.01% |
8,700
-7,700
| -47% | -$1.09M |
|
2697
CALL
Hycroft Mining Holding Corp
HYMC
$1.85B
| $1.27M | ﹤0.01% |
508,200
-15,000
| -3% | -$36.2K |
|
|
JBTM
2698
PUT
JBT Marel
JBTM
$7.14B
| $1.27M | ﹤0.01% |
12,900
+12,800
| +12,800% | +$1.18M |
|
2699
McCormick & Company Non-Voting
MKC
$13.4B
| $1.27M | ﹤0.01% |
+15,406
| New | +$1.2M |
|
2700
ProShares Short VIX Short-Term Futures ETF
SVXY
$220M
| $1.26M | ﹤0.01% |
25,189
+13,423
| +114% | +$726K |
|
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.