TANG CAPITAL MANAGEMENT LLC — SEC Form 4 filings
SEC reporting owner CIK 1232621. 14 Form 4 filings on record with FilingPulse; latest filed 2026-08-28.
Transaction summary — filings shown
Covers all 14 filings on record, filed 2024-02-02 to 2026-08-28. Counts and totals are arithmetic on values as filed — descriptive data, not a recommendation.
- Open-market purchases (code P, non-derivative): 36 legs across 10 filings — 1,966,007 shares, $17,262,284 total (shares × price as filed).
- Open-market sales (code S, non-derivative): 1 leg across 1 filing — 18,300 shares, $54,351 total (shares × price as filed).
- Other reported legs (grants, option exercises, tax withholding, gifts, derivative-security transactions, …): 4.
- Largest priced transaction: purchase of 343,521 shares @ $15.28 ($5,249,001) in Aurinia Pharmaceuticals Inc., filed 2026-06-02.
By issuer — same filings
Open-market purchase/sale legs on non-derivative securities, grouped by issuer. Role is as filed on the newest filing for that issuer. Dollar totals cover priced legs only (shares × price as filed). Ordered by priced transaction value, largest first.
| Issuer | Role (as filed) | Filings | Purchases (P) | Sales (S) | Other legs |
|---|---|---|---|---|---|
| Aurinia Pharmaceuticals Inc. (AUPH) | 10% owner | 1 | 5 legs · 814,606 sh · $12,455,227 | — | 1 |
| Singular Genomics Systems, Inc. (OMIC) | 10% owner | 2 | 3 legs · 122,416 sh · $1,806,220 | — | 1 |
| Boundless Bio, Inc. (BOLD) | 10% owner | 7 | 22 legs · 611,423 sh · $1,515,094 | 1 leg · 18,300 sh · $54,351 | — |
| Fulcrum Therapeutics, Inc. (FULC) | 10% owner | 2 | 6 legs · 417,562 sh · $1,485,743 | — | — |
| Rain Oncology Inc. (RAIN) | 10% owner | 1 | — | — | 1 |
| TCR2 THERAPEUTICS INC. (TCRR) | 10% owner | 1 | — | — | 1 |
Form 4 filings — TANG CAPITAL MANAGEMENT LLC
| Filed | Form | Issuer | Reported transactions | Source |
|---|---|---|---|---|
| 2026-08-28 | 4 | Boundless Bio, Inc. (BOLD) jointly with TANG KEVIN | Sale (S): 18,300 @ $2.97 | EDGAR |
| 2026-07-21 | 4 | Boundless Bio, Inc. (BOLD) jointly with TANG KEVIN | Purchase (P): 265 @ $2.44 · Purchase (P): 1,623 @ $2.44 · Purchase (P): 2,975 @ $2.44 | EDGAR |
| 2026-07-20 | 4 | Fulcrum Therapeutics, Inc. (FULC) jointly with TANG KEVIN | Purchase (P): 116,671 @ $3.56 · Purchase (P): 50,945 @ $3.52 | EDGAR |
| 2026-07-16 | 4 | Boundless Bio, Inc. (BOLD) jointly with TANG KEVIN | Purchase (P): 43,878 @ $2.43 · Purchase (P): 1,600 @ $2.44 · Purchase (P): 18,491 @ $2.44 | EDGAR |
| 2026-07-15 | 4 | Fulcrum Therapeutics, Inc. (FULC) jointly with TANG KEVIN | Purchase (P): 12,966 @ $3.54 · Purchase (P): 53,651 @ $3.56 · Purchase (P): 75,952 @ $3.58 · Purchase (P): 107,377 @ $3.56 | EDGAR |
| 2026-07-13 | 4 | Boundless Bio, Inc. (BOLD) jointly with TANG KEVIN | Purchase (P): 7 @ $2.48 · Purchase (P): 43,367 @ $2.43 · Purchase (P): 48,211 @ $2.42 | EDGAR |
| 2026-07-08 | 4 | Boundless Bio, Inc. (BOLD) jointly with TANG KEVIN | Purchase (P): 27,062 @ $2.49 · Purchase (P): 15,810 @ $2.48 · Purchase (P): 14,338 @ $2.46 | EDGAR |
| 2026-07-02 | 4 | Boundless Bio, Inc. (BOLD) jointly with TANG KEVIN | Purchase (P): 25,930 @ $2.54 · Purchase (P): 100 @ $2.50 · Purchase (P): 71,612 @ $2.49 · Purchase (P): 9,821 @ $2.49 | EDGAR |
| 2026-06-29 | 4 | Boundless Bio, Inc. (BOLD) jointly with TANG KEVIN | Purchase (P): 145,880 @ $2.48 · Purchase (P): 510 @ $2.56 · Purchase (P): 75,047 @ $2.55 · Purchase (P): 134 @ $2.54 · Purchase (P): 63,985 @ $2.47 · Purchase (P): 777 @ $2.48 | EDGAR |
| 2026-06-02 | 4 | Aurinia Pharmaceuticals Inc. (AUPH) jointly with TANG KEVIN | Purchase (P): 2,299 @ $15.35 · Purchase (P): 262,682 @ $15.31 · Purchase (P): 343,521 @ $15.28 · Purchase (P): 99 @ $15.34 · Purchase (P): 206,005 @ $15.28 · Other (J): 10,000 (derivative) @ $1.65 | EDGAR |
| 2025-02-27 | 4 | Singular Genomics Systems, Inc. (OMIC) jointly with TANG KEVIN, TANG CAPITAL PARTNERS LP | Disposition to issuer (D): 372,000 | EDGAR |
| 2024-09-18 | 4 | Singular Genomics Systems, Inc. (OMIC) jointly with TANG KEVIN, TANG CAPITAL PARTNERS LP | Purchase (P): 50,416 @ $12.74 · Purchase (P): 40,000 @ $15.33 · Purchase (P): 32,000 @ $17.21 | EDGAR |
| 2024-02-14 | 4 | TCR2 THERAPEUTICS INC. (TCRR) jointly with TANG KEVIN C, TANG CAPITAL PARTNERS LP | Other (J): 4,394,800 | EDGAR |
| 2024-02-02 | 4 | Rain Oncology Inc. (RAIN) jointly with TANG KEVIN C, TANG CAPITAL PARTNERS LP | Code (U): 3,850,513 | EDGAR |
FilingPulse's Form 4 archive currently extends back to 2024-01-11 and is expanding backward through EDGAR history — earlier filings by this insider may not be indexed yet. Names and roles are shown as filed.
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